Hey All! I drew the winner for the Lulzbot Mini Printer between all patrons and viewers who signed up AND a patron with the name of "Beautiful Machines" won! Thanks everyone for being around!
Nope, he said "...I'll give away one of them to my Patreons... ...as well as you, the viewers..." meaning everyone was in the same pool. If there were more than one being given away, he would have specified how many there were.
Cody, you do much the same thing. I told you once that you reminded me of "Mr. Wizard", a Saturday morning b/w TV show of the 50's. He was always coming up with weird experiments that would dazzle us. Thanks to you both....
I got a degree in electrical and electronic engineering many years ago but the theory wasn't backed up with much practice or demonstration. You've not only demonstrated the concept but injected your wonderful enthusiasm for the subject. Thank you!
I also got a master degree and must admit i didnt get so much Important Background theory, i just calculated what my Professor wanted me to, without understanding what im really doing... Thats why Love this channel
Classes did me no good, same. The teaching fails in part because they use the term EMF (electromotive force) for voltage as if it were some sort of mysterious thing, they should be calling it EP, electrical pressure, from electron crowding, electrons aren't comfortable being crammed together, not unlike air molecules in a balloon. It's possible that electrons actually have no charge and instead it's simply this: When a bunch of them are crowded together, we call that negative, and when they have been sucked away, similar to a vacuum, we call that positive charge. The difference between electrons flowing in a wire because there's a crowded area and less crowded area for them to move to versus water or air in a hose trying to move from a pressurized area to one less pressurized ... is the magnetic field electrons cause when they move. That's pretty much all there is to it. But moving water, air or even light might also have a field we just haven't discovered yet. Like you guys are saying, it wasn't until I started working with actual stuff that I got it, one day, bam, it clicked, a eureka moment, and I also felt betrayed by the teachers at the same time. So then I looked up a 7th grade school book on electricity. And as I suspected, if you know, it is written to sound somewhat ok, but if you're trying to learn, you would never get it from what they say. And that might be intentional.
I have three degrees and none in electrical engineering but I"m pretty sure touching a 3 phase circuit will help you to get a afro and a heart murmur if you are lucky and lots of sleep if you aren't.
Physics (electricity year 2) , what's 3 phase, lecturer just jumped in like we new everything already and used a lot of math which got me confused more.
@@A_I_N_P My major is Information Science Engineering (basically computer science). In the the first 2 semesters we are taught the basic concepts of different branches like civil, mechanical, electrical etc.
Mehdi's explosive demonstrations are not only extremely entertaining, but also serve as a very tangible warning about common errors. It also makes me really afraid of messing with electricity, unless I know exactly what I'm doing, and I'm still using all possible failsafes and protection I can. Just brilliant!
Little tip&trick. We use the paper masking tape (used for painting rooms) and apply it on the printerboard. After printing it can be pulled off a lot easier and the tape discarded.
Also letting the part to cool helps to pop it off. Sometimes popping it in the freezer can pop it off. Just let any glass plates cool to room temperature before throwing them in the freezer. Unless you want to buy a new printbed
I remember one farmer who could work on electric fences while they were live. I don’t know how he was able to take it. Another guy contracts to change a famous brand light bulb and had gotten shocked so many times it done something to his nerves and now he can’t hardly feel getting shocked. Good thing his company retired him!
A truly excellent explanation. I wish this kind of thing was available 30 years ago when I was lecturing this stuff. To be honest, it is even clearer in my mind now. Well done.
Sir I started watching your videos lately. I am a student of engineering and your videos are beyond any measures. Thanks for your hard work sir, you inspire us and keep our interest firm for electronics.
I went through a school for electrical engineering, and i found this to be one of the best lessons on the subject i have ever had the honor to consume.
In Germany all houses have a 3 phase power supply. It is splitted in 3 single phases, but if you are any enthusiast and have for example a CNC machine or car lift in the garage, you can use all 3 phases by making a 3 phase outlet.
cokefridger it's a shame houses are only wired for single phase in the states. Probably too expensive for contractors and the power companies to implement
What about the play on the name ElectroBOOM - the "boom" in shouting caps as in OUCH? Was ist mit dem Spiel auf den Namen ElectroBOOM - der "boom" beim Schreien von Mützen wie in AUTSCH?
I am a retied electrician and at one time I was lead electrician/engineer for the third highest building in Washington state. With few exceptions, almost every heavy electrical load ran on 3-phase power. We used many VFD's in our air-conditioning plants. I really liked you lecture on 3-phase power and how it works. I have been out of the electrical field for years but your videos are a refreshing reminder of my happy days as a practicing electrician!
You've explained this so much better than they did at my school many years ago. The advantage of not needing the neutral wires for the combined 0 volts is definitely interesting, I wish they had explained it in this way so it might have stuck. I like your visualisation with the coaster, a simple explanation of a potentially complex subject.
In fact, it's a little more complicated. The circuit is closed through a winding that does not currently have an "amplitude" (popularly speaking). However, we have other influences, such as hysteresis in the case of inductive loads. Note the case where the fan motor was rotated directly by the three-phase current from the motor. He winced and spun slowly. The fourth wire (zero) is often used in similar applications that have a "star" connection. Of course, the sum of currents or voltages in this three-phase network diagram is 0, but this does not mean the absolute cancellation of the fourth conductor. Very high voltage pylons have this conductor at the very top ...
I have a degree in electrical technology, but I feel like I understand this even better now. You explain things much more clearly than any of my professors did.
Same here, I finished college last year and have worked in a power plant ever since, my colleagues are good at explaining things but the way electroBOOM explains and demonstrates also helps alot with understanding what is going on in the machinery at work.
08:17 small correction. Three sets of electromagnets placed Mechanically out of phase by 120deg. Very informative and beautifully explained. Can't imagine how much effort you put into making these wonderful material. Thanks a ton. Lots of love🙏
This is the 1st video of your's that I've seen, and I can't believe I haven't heard of you before. Very good content, and I think you have a very likable personality. Very funny, and very fun to watch! Thank you!
I came here from a compilation of abruptly cut screams. I couldn't find the other original clips but this guy's clip had the channel name and I found him. I can't believe I was so lucky.
I always wondered why doubling up 120 made 208 and not 240 but this makes perfect sense because when the phases shift 120 degrees the peaks and valleys aren’t directly over each other so you don’t get the full peak and valley of the wavelength that you would get at 180 degrees
Just to know - in Europe you have 3 phases at home not only in industrial areas and the voltage is higher - 230V one phase and 400V 3-phase. The higher voltage got a benefit if you have a fixed power-requirement. You need with 115V a wire with the double width because of the line loss the copper wire has. One interesting history fact about transmission lines - 1882 the first transmission line was built with 2 kV DC over 57km. The efficiency was 25%. And in 1891 the first transmission line with 10kV AC over 176km was built. The efficiency was 75%. Today we use in Europe depending on the distance and economy AC transmission lines between 110kV and 1000kV. The most common used are 3 phase 400kV. Because of the weight transmission lines are out of aluminium. In comparison the weight is 55% of a comparable copper-wire with the same AC resistance and line loss.
@@petehiggins33I understand all these things but what is more important is the wattage so you can use higher voltage but you should in that case give a lot less current (amperage), the most important thing that you should never change the wattage
No joke, I'm using this video to learn about 3 phase AC currents before my college starts. I've known about Electroboom before college but now, I'm totally hooked! Thank you so much for the videos Mehdi!
Damn…I LOVE your presentation! I went to electronics tech school for two years, studied on my own and worked a a tech. I never quite felt at ease with three phase, the why, the how, and we NEVER had any teacher that was so much fun while still being incredibly informative and even with the joking, there is a very high signal to noise ratio in your teaching! Definitely going to check out your other videos! Thanks!
I've been a master electrician for 40 years and this is one of my favorite subjects to explain to laymen. 3 phase solves the problem of zero voltage potential and no work being done that occurs twice every cycle of single phase, with 3 phase there is always work being done because the phases overlap by 120 degrees, thereby massively increasing efficiency. Many years ago there also was 2 phase systems where there were 4 current carrying conductors arranged in 2 sets of two that had to be paired properly, it proved to be more expensive than 3 phase, wasn't as efficient and it was a pain in the posterior so it never caught on. We had an old factory in our city that had ancient machines that ran off of a 3 phase to 2 phase motor/generator converter, I hated working on them but just my luck, I was the only person they could find that understood how the electrical parts worked. The only reason they kept them going was because they were specialized machines that couldn't be replaced.
Great video, a couple of points. 1 The input power of 3 phase motor with a current of I amp per phase and a phase to is is not 3VI but (sqr rt 3) VI 2 The reason why the motor generator set had a low efficiency was because the magnetic field was just the residual field in the laminations. Full size generator either have a rotating rectifier or slip ring to supply a dc current to the rotor.
In my school we learned about 3 phases current , sometimes paper and pencil can't do that much to make you understand how it works in detail, now I know how it works :) Love and respect for you🙏
I like working with 3 phase motors as they are much easier to start. Thank you for posting on this very important topic. This subject is something that is used in most businesses as it makes for smoother power output with smaller capacitors on the output of a bridge rectifier.
this has become one of my favorite channels on YT. Very informative but at the same time super funny and keeps me guessing each time a connection is made or wires touch
The best reason for 3 phase is the fact that when the 3 loads are equal then the power from the system is a constant. In other words the power is NOT modulating at 60Hz like a single phase motor. Rather, the power is not modulating at all. It is a constant. This means that for a single phase motor you can hear it humming at 60Hz. But for a 3 phase motor (if it was perfectly constructed) you won't hear any hum. This means nearly no 60Hz vibration and thus the motor lasts longer. And the torque output of the motor is also a constant which induces less vibration into the load so the load lasts longer. Some math. Power is a function of the square of the voltage. Single Phase Power=SIN(alpha)^2 = SIN(2*alpha) which varies with alpha Three Phase Power=SIN(alpha)^2 + SIN(alpha+120)^2 + SIN(alpha-120)^2 = 1.5 for any alpha
I heard a sawmill operator say exactly what you're talking about with a grinder that used a 300 horsepower electric motor. He said someone was running frozen wood through the grinder, and the force involved caused the ground to shake, but "ou can't hear anything from the motor, so "you can't tell whether or not it's working hard, but it must've been".
You will still get Lorentz attractions in the end windings and magnetostriction in the stator core, both of which can cause humming at twice the electrical frequency.
Sooo his entire channel shows him failing and them has him showing you why he failed and then how to do it properly. Just like when he shocks himself he broke the 3d printed object ON PURPOSE
Very interesting video, I am an electrician on a USCG cutter, we use a wye configuration like all ships. Funny story: in trouble shooting a generator we took current and voltage readings on the governor actuator control circuit... I did exactly what you did at 3:05 thinking my meter was set for voltage and killed the governor thus killing the generator and the entire ship's power... That's one way to learn a lesson about checking your meter XD
Seems to me you add the slap-stick comedy for effect... I love it... it works on several levels, as a warning, as a safety briefing, as a “shtick” for comedy, and as a common leveling tool, “see it happens to mee also”... great stuff! The entire video is great... thanks!!!!
LOL@mishaps. But another reason 3-phase systems got expanded a great deal in the early 1900s is because there was an efficient way to rectify the 3-phase current back to DC: the mercury cathode rectifier. These don't work too well with 1-phase AC (the arc gets extinguished on the reverse half of the cycle and is hard to reignite, whereas in a 3-phase rectifier the arc never extinguishes). Remember, there were no high-power silicon diodes back then.
@3:05 too late with the tip. It already happened to me... But I was standing on a ladder measuring the light point in the sealing. It was quite the scare... If only I had a camera and a unibrow, it would have made for a nice video.
when i was 14 we had a problem in the house and i tried to measure current in parallel on the main house switch, it was scary as hell. I knew how to do it properly but i was so fed up that i just forgot
I have been worrying about my third technical term for my apprenticeship for a good while. You managed to oversimplify the entire intake with one vieo. Thank you.
Not everyone has 3 phase power in Poland. It's common in houses, but in older flats it was common to just have one phase installation for each apartment, but it's last mile problem. Usually every building has 3 phase source available. Although 3 phase is common, there's really no big use for most of us. Only instant water heaters are a common consumer devices that use 3 phases and only high powered ones. There are many 1 or 2 phase heaters. Induction cookers are probably the main reason why most people needs 3 phase installation, but those cookers only use 2 phases anyway. I myself have pretty much an industrial installation and I have a few of big 3 phase motors. Just starting them makes you nervous. Loud and powerful.
That isn't true. The OP is correct. Few countries get all 3 phases to every house. It is most common in Europe. Some houses in 120v countries get 2 phases.
Power companies can even supply single phase, and neutral is tied to earth ground. For small houses in the middle of nowhere. So much for the GFCI protection on a hair dryer in a home wired this way.
240 AC in Canada (and US) is delivered to the house with the neutral tapped from centre of a local transformer (aka split phase). Having a voltage of 203V suggests there is an apartment building transformer taking in 3 ph and and splitting off 2 phases to apartments. (apt A is red-blue, B is blue black, C is black blue, etc), nominally 208V. In my kitchen, measuring both hots gives 240AC (house), and all single phase.
i know its just a joke (mostly lol) but don't be too hard on teachers. they have to do it live, and they have to do it again and again. Usually to an audience that isn't super stoked to be there. It's a very different animal
Frosty. You are right, teachers have to explain the same, again and again, but that is their job, if they are going to be a assholes then don’t choose to be a teacher
What does that tell you about high school or even Canadian universities. We are teaching kids and adults the wrong things with horrible robot teachers.
Again, golden material. well explained. I was aware of a 3-phase motor. Your explanation was better, i wasn't aware the degree of phase impacted the voltage. Thank you for this!!
Now I suddenly understand the Y configuration. sin(x) + sin(x+2pi/3) + sin(x+4pi/3) = 0. Wow! Now I know why the return wire is often left off the diagrams. Decades of confusion cleared up in a few minutes. Subscribed!
It was an excellent refresher even for seasoned electrical engineers.....we learned so much so quickly that it was hard to retain the basics from time to time.........After 25 years working i also found the online HAM radio training to be avtremendous refresher of first two engineering terms. But the learning never stops......three years wrestling with $13000 ETAP software even after three training session proves electrical engineering has no end in sight.
@@solomonthell7589 what are the perks of a ham license how does it teach electrical engineering, arent they 2 different things? They teach igbt no way...?
I am in Australia and the houses either side of me have 3 phase. I have one phase so I am limited to about 100A maximum, and it makes me sad sometimes. New houses commonly have central A/C system so will have 3 phase as standard - you'd be crazy to only have 1 phase installed.
That was a great video man. I'm a electrical engineer and It helped me refresh some of the concepts I learnt in college, and also I learn some other things too. It's also crazy how you make a shortcircuit almost every 2 minutes 😅
4 year of electrical engineering yet I forgot everything and had to come here to refresh :( if the eligibility for jobs/higher-studies have an emphasis on practical knowledge rather than marks; I would be working in an actual engineering lab rather than developing e-commerce websites for undergarments :p now I come here, watch a couple of videos and smile and then go to sleep :D :D
@@kahuna1247 i had a very good understanding of electricity from a very young age :) Not everyone can afford higher studies nor all house hold are rich.
If anyone is confused why he has 208 volts but you have 240, houses get 240 volts across a single phase. We get 120 by tapping in the middle of the transformer's secondary winding and that's the neutral wire. Apartments and other large buildings usually bring all 3 phases in, each 120 degrees apart. In each individual apartment only 2 of the phases are used and since they're 120 degrees apart the resulting voltage is 208 volts.
This video really made me appreciate how much of a genius tesla was, with a modern perspective it's easy to see 3-phase ac is the way to go, but to conceptualize these ideas over 100 years ago, and then make them a reality is truly amazing. Truly a genius and a very creative thinker
Alright, let's not get carried away. His wife has some hot shot cake decorating skills for sure. But NOTHING rivals the majesty of that glorious forehead moustache.
My only regret is that I didn't come across this channel sooner. Really great content and excellent delivery. Plus, the "accidents" definitely help to show the dangers of electricity.
7:27 It sounds like a printer motor. Because of the sine waves, and at 7:36, this is why it reminds me of "Crazy Machines - Die Erfinderwerkstatt or Warsztat Wynalazcy". It reminds me of Lasko and SMC oscillating fans with my favorite parts that match when some fan parts are different. SMC oscillating fan motor covers are my favorite when they have teardrop shaped vents in a circle, and the Lasko fan motor covers are my favorite when they have arched vents on top and horizontal vents on the bottom. The guard nuts, rectangular mountain slanted oscillating knobs, and if applicable, the "0-3-2-1" marking on the mechanical speed control on top of the motor cover unless it has a remote, which in that case, it'll be on the front of the fan (and may have a timer) are also my favorite, but it depends on what parts are intact.
I've once been in the Museum of Electrotechnics in Budapest, Hungary(Yea, I'm Hungarian), where I've seen an interesting experiment with rotating magnetic fields. They had a circular plate with a frame, where they put an egg made of copper(or iron?), then they applied the rotating field, and the egg started spinning, and stud up on its top. Also it could turn a watches pointer, when placed in the filed. Maybe you should try making something like this.
Small error at 9:55 - the BLDC motor is in fact a three-phase synchronous motor and NOT an induction motor. The rotor field is the result of magnets and NOT induced from the stator.
Studied AC theory and LRC stuff in A level phys many years ago. Now I get it. Especially the redundancy of earth wire and how induction motor field orientation drives the rotor spindle.
in canada we run 2 phases to each home???? No, its a single phase. A split phase to be precise. Every other breaker on the CB panel is the opposite side of that single phase. To get 240v you simply run tap across 2 consecutive breakers instead of using one and a neutral. Maybe in apartments it is different, but in houses it a single phase.
Yes: He's probably in an apartment or condo building that is wired up with commercial 3-phase power. Every unit would be handed out 2 phases in a round-robin fashion to try and keep it balanced. 208 volts across the two legs is a dead giveaway for 3 phase power since if he were on split-phase it'd be 240.
Ah, I thought it was split phase for the home as well. Thanks to Mike Pepe i'm starting to get my head around to understanding 208 volts we use at work, kinda!
@@glennfrancis9031 In the US and Canada there is a wide variety of domestic and light industrial electrical supplies, so you can't assume anything in particular. The 'most common' domestic setup is that each household gets a single 240V phase, via a centre-tapped-and-grounded transformer so it looks like two 120V supplies. The full 240V is then available by connecting a load across the two live conductors, instead of between live and neutral. Some place instead get actual three-phase - more common out of the city where farmers etc want to run bigger kit like welders. But wait! There's two types of three-phase - star (wye) and delta. Star/Wye has a neutral at the centre, as described in the video - 'nominal volts' (120V) between any Live and Neutral, and a higher voltage (208V) between any two lives. Delta has no neutral, and is instead nominal volts between lives. You connect your load between the two lives. In the US it's generally either 120V or 240V phase-to-phase. But wait! There's a third type of three-phase - "wild leg" In "wild leg", you start with a normal delta three-phase, but centre-tap one of the phases (and usually ground it). In the US, this is used to give 120V, 240 and 208V supplies from the same transformer: Centre-tap between L1 and L2, call that tap the 'neutral'. If L1 to L2 is 240V, L1 to 'neutral' is 120V, L2 to N is 120V, L3 to L1 is 240V, L3 to L2 is 240V, L3 to neutral is 208V. So just because you've got a 208V phase, it doesn't mean you've got 3-phase Star/Wye
Beware, brushless DC is not the same as induction AC. Both work with 3 phase AC but one use permanent magnet and the other use ferromagnetic bars that are polarised with the coils when the motor starts. That's why when you use induction motor, you have to use a good electric variator to polarise your bars with minimum power loss. That is also why we talk about synchronic and asynchronic motors
In Sweden we have 3 phase AC to every single house (and many apartments too). That way we can install 3 phase motors in the house. For example, the heater and boiler is 3 phase, and the pump in our spa bath is 3 phase. Some ovens with stove are also 3 phase. Many electric car chargers are 3 phase as well.
Very well explained that - for energy transmission 3 phase is - while using only 3 wires for balanced load between phases- is most energy and cost (copper use) effective! And there is more: single phase driven motors have torque variation during each turn while 3 phase motor have constant torque resulting in less noise and wear! Another advantage is you don't need one or 2 capacitors to create a rotating field which makes 3 phase systems much more reliable as capacitors break down much faster than any copper wire or steel core. Add permanent magnet rotor and you have synchronous motor even more accurate to control RPM. or use motor as synchronous capacitor to improve cos phi..Several 3 phase asynchronous motors born before the 2nd worldwar still work perfectly which is testiment for the reliability of the 3 phase system without electronics.(to reduce in rush current for big moters star/triangle switches were used. To change rotation direction just swap any 2 of the 3 phases. Switching 3 phase is easy as each phase has it zero crossings albeit 120 degrees after eachother. And if you really need a DC voltage you just need 6 diodes - good for charging EVs- as you get much less ripple than a rectified single phase which - without stupid capacitor - touches zero twice per period (100 times per second at 50Hz).. civilized Europe (and many other regions) has standardised its consumer voltages to 3 phase 240V (single phase to neutral) and 400V between any 2 of the 3 phases.. just some more advantages of 3 phase systems, Wessel Furthermore: If you want speed control nowadays 3 phase frequency inverters from 10Hz to 200Hz are easily available allowing decent torque control from start up at 10 Hz to above 10000 RPM for the very reliable 3 phase asynchronous motors...
I think a correction is required here: 3 phases electricity on 3 wires HAS NOT BEEN INVENTED BY TESLA. Tesla invented a 3 phases motor using 6 wires and never thought about using only 3 wires. That invention has been made by Dolivo-Dobrovsky. He is also the one who designed the wye and delta arrangements and figured out a easy way to raise and lower the voltage for long distance transportation of electricity. Definitely not Tesla.
Maybe it's too late to ask, but could you eventually make a video explaining why we stop at 3 phases? It feels intuitive to think (although I know it's wrong) that adding more phases, all equally lagging or leading each other, could improve power transmission even more than with a 3 phase system. I know it envolves the math behind it, because the voltage behaves as a sine wave, and it peaks at a certain degree, but I'd love to hear the full explanation with the charisma and sparks of THE RECTIFIER
Nicola Tesla actually designed 2,3,4,6 phase systems (I can't remember if 5 and 7 phase were tried as well but it seems like it) but settled on the 3 phase system I believe because the math works out better . Large AC generators have the stator windings arranged around the stator frame in series to increase output voltage with duplicate parallel windings to increase KVA output capacity instead of adding additional phases .
3,6,9 might be possible. By theory if 3 phase added up to 0V. Then adding up another 3 phase with the same shifted phase time at any starting point should be ok. But the need to calculate the imbalance neutral line to support peak voltage if a number of the load are turned off (disconnected) or any imbalanced load.
Apparently my proffessor in electronics says that the real inventor of the 3 phase AC was actually a guy from Riga Technical University, his name is Mikhail Dolivo-Dobrovolsky, he had run different prototypes and tests before this discovery blew up, check out. As an article from my university says: The globally known engineer and inventor Mikhail Dolivo-Dobrovolsky studied chemistry at the Riga Polytechnicum for 3 years. Later, he went to Germany and worked for AEG company. During that time, he has invented and constructed the first three-phase alternating current generator with rotating magnet field capacity of 2.2 kW. During the World Electrotechnical Exhibition in Frankfurt, in 1891, for the first time ever he demonstrated transfer of three-phase electric power on long distances. The demonstration of the effectiveness of three-phase power marked the end of discussions about most suitable currents. This invention marked a significant turning point in the history of technology and was one of the most important events in the history of electricity.
Three phase AC was not invented by any single person, but by Mikhail Dolivo-Dobrovolsky, Nikola Tesla, Galileo Ferraris, and Jonas Wenström. All of them supplied an important part to the creation of polyphase power. Wenström's name is famous because hes the guy that Edison stole the carbon bulb filament idea from (neither of them invented the light bulb), and Ferraris is the guy that invented the alternator. Tesla's biggest contribution to 3 phase AC may be, in fact, making sure Edison stole 3 phase AC and claimed it as his own (after being thoroughly embarrassed after the whole AC vs DC showdown between Tesla and Edison years earlier) , thus popularizing it worldwide. None of the four had the resources to make this a commercially viable system ready for mass adoption.
@@Diablo-D3 Ferraris was the first to invent the induction wire-wound motor, Tesla copied it two year later and was so cheeky, that he sued Ferraris for patent rights (trial finished after Ferraris death with verdict satisfactionary for Tesla). Single-phase AC was used in Europe - although in small scale - in 1878. Tesla's AC generator was built with slip rings to collect the current - while the other design (Dobrovolsky) used modern approach witch stator winding fed to step-up three-leg transformer. probably the greatest invention of Dobrovolsky was neither generator, transformer nor squirell-cage rotor (which ironically powers most "Tesla" cars) but phasemeter, that allowed to easily synchronise many generators and create coordinated electric grid as we know it nowadays.
@@brylozketrzyn I wonder if Mehdi should make an entire video about the history of electricity and cover all of this. I'm pretty sure he couldn't blow anything up in it. Reasonably sure.
@@brylozketrzyn Your italian hero looked at the induction motor as a mere curiosity, when he saw the cash potential he tried to have a grab. So, don't bullshit us with Tesla being cheeky ! They where both inventors and must be grateful that they even existed. Tesla went the extra mile to prove his ideas, Ferraris stayed in Italy. Big difference !
This is the very 1st video I watch from this channel which I get A LOT of informtion, very technical. Hope to have more detailed videos in the future from this channel. Today I sub to your channel 😁.
He knows what he's doing...Those are not accidents....they are staged to make the video funny. Like "reality TV"....everything is fake.....nothing about reality.
Outstanding video!!!!! You can work an oscilloscope as well as a DVM and still look respectable! :) In every apartment I have ever lived in before finally becoming a homeowner here in the United States, the "hot to hot" voltage was *always* 205-210 (which reflects the 120 degree phase difference) instead of 230-240 volts (which reflects the 180 degree phase difference almost always seen in standalone residential houses). The reason why builders do this for apartments is that to supply center-tapped 120/240 volts from a common single phase transformer for, say, 300 apartment units spread across 10 or more separate buildings requires significantly more cable (number of plus size of conductors plus the associated labor) than the equivalent three phase system to deliver the same power. Installation costs alone would be $100,000 or more difference. A second reason is that the local utility company *encourages* three phase usage to keep the phases balanced. Without this, using a large 1000 kVA single phase transformer would require *two* additional apartment complexes each using the other phases on the same circuit (often on the same street) all running at equivalent power levels. So our 300-apartment complex example will still have its two phase load center in each apartment. First group of 100 apartments would be Phase A and Phase B hot-to-hot. The second group - Phase B and Phase C. The third group would be Phase A and Phase C. Nominal voltage is 120 * 1.732 = 208 volts. Most of the smaller ranges and dryers marketed for apartment use are designed to function at either voltage but the lower voltage when applied means the oven will not get nearly as warm since you have 25% less power going to the oven. [The surface heating elements on most smaller and older ranges still use 120 anyway so no loss there.] If electric heat is a factor, all that means is either a 208-volt rated baseboard heater or install 240-volt heaters and the customer will wait longer for the room to warm up using the lower voltage. The thermostat works the same way either way.
I'm not sure - but in comments on Technology connections channel someone said that in reality on 208V you have like 86.7% of power of 240V. Which would make sense given that 208/240 = 86.7%. Then again I'm not sure if there isn't something that would reduce it (current? Should be the same, but 120 degree shifted phases don't cancel each other out - so there might be some losses there). Now I have to go and rewatch that video.
Of course - this depends on whether the appliance was designed originally for 208V or is just a 240V appliance that can work with 208V. In first case you're closer to 86.7% in latter to 75% - because wattage goes with the square of Voltage. But if you optimize - you can regain some of efficiency (not in terms of raw power of course) - so it mostly depends if what you need more is power or current.
![BOWKYLION - วิงวอน (ex-change) [Official MV]](http://i.ytimg.com/vi/cLdnZWDaO-w/mqdefault.jpg)
Hey All!
I drew the winner for the Lulzbot Mini Printer between all patrons and viewers who signed up AND a patron with the name of "Beautiful Machines" won!
Thanks everyone for being around!
ElectroBOOM HI
Thought you were giving away one for patreon and one for TH-cam.
Nope, he said "...I'll give away one of them to my Patreons... ...as well as you, the viewers..." meaning everyone was in the same pool. If there were more than one being given away, he would have specified how many there were.
plzz give it to me
No! Too late :(((
I hold my breath every time he connects something.
Same here
lmao
same
Haha, or at least prepare mentally so that you don't have to be quite as startled, huh?
Yes
I appreciate how you intentionally mess up and make sparks to show us what not to do.
Cody: Hey! Don't ruin the illusion :(
i almost shit my pants
Cody, you do much the same thing. I told you once that you reminded me of "Mr. Wizard", a Saturday morning b/w TV show of the 50's. He was always coming up with weird experiments that would dazzle us. Thanks to you both....
Hey man long time no see did you ever get your channel straightened out?. Love your vids man!.
:D I don't suppose you can intentionally mess up your experiments, you could lose a finger or two!
I got a degree in electrical and electronic engineering many years ago but the theory wasn't backed up with much practice or demonstration. You've not only demonstrated the concept but injected your wonderful enthusiasm for the subject. Thank you!
I also got a master degree and must admit i didnt get so much Important Background theory, i just calculated what my Professor wanted me to, without understanding what im really doing... Thats why Love this channel
It's because the professors at the universities don't really understand what they are teaching. Those who can do....
@@t07minas so do you work at KFC
Classes did me no good, same. The teaching fails in part because they use the term EMF (electromotive force) for voltage as if it were some sort of mysterious thing, they should be calling it EP, electrical pressure, from electron crowding, electrons aren't comfortable being crammed together, not unlike air molecules in a balloon. It's possible that electrons actually have no charge and instead it's simply this: When a bunch of them are crowded together, we call that negative, and when they have been sucked away, similar to a vacuum, we call that positive charge. The difference between electrons flowing in a wire because there's a crowded area and less crowded area for them to move to versus water or air in a hose trying to move from a pressurized area to one less pressurized ... is the magnetic field electrons cause when they move. That's pretty much all there is to it. But moving water, air or even light might also have a field we just haven't discovered yet. Like you guys are saying, it wasn't until I started working with actual stuff that I got it, one day, bam, it clicked, a eureka moment, and I also felt betrayed by the teachers at the same time.
So then I looked up a 7th grade school book on electricity. And as I suspected, if you know, it is written to sound somewhat ok, but if you're trying to learn, you would never get it from what they say. And that might be intentional.
I have three degrees and none in electrical engineering but I"m pretty sure touching a 3 phase circuit will help you to get a afro and a heart murmur if you are lucky and lots of sleep if you aren't.
I worked at Siemens Electric for 12 years and you explained 3 phase systems better than anyone I worked with, that job was the best job I ever had.
I currently work there!
Did you cringe at 6:44?
That is so sad, 12 years 🤔😅
What was the pay though? Was it good pay or great pay?
@@waldolemmer What's to cringe at that timestamp?
An electrician with a sense of humour... A true blessing...
Walter Messines check out AvE
Engineer*
Electrical engineer*
How would you know Walter?
I really love to see him with all those fireworks, can't wait to see him sticking wet fingers into the mains sockets. 😆
I learnt about this 1.5 years back in my 2nd semester of Engineering but I understood it today.
TH-cam >> All engineering universities combined
Physics (electricity year 2) , what's 3 phase, lecturer just jumped in like we new everything already and used a lot of math which got me confused more.
@@A_I_N_P My major is Information Science Engineering (basically computer science).
In the the first 2 semesters we are taught the basic concepts of different branches like civil, mechanical, electrical etc.
@@A_I_N_P meh it sometimes takes time for concepts to sink in, especially if he's doing his degree in 4 years.
Same lol
In 11 minutes, you've taught me what an entire semester of electrical engineering couldn't.
Entire semester ,i spend 4 years on electical engineering and this video told me more than that of my whole collage studies
@@koalabear8953 lmao same
Power electronics!
dam
You must have been sleeping all the semester. 3 times the power???? Come on....
Mehdi's explosive demonstrations are not only extremely entertaining, but also serve as a very tangible warning about common errors. It also makes me really afraid of messing with electricity, unless I know exactly what I'm doing, and I'm still using all possible failsafes and protection I can.
Just brilliant!
Little tip&trick.
We use the paper masking tape (used for painting rooms) and apply it on the printerboard. After printing it can be pulled off a lot easier and the tape discarded.
thanks man
Claudy ? Toi, ici ?
Also letting the part to cool helps to pop it off. Sometimes popping it in the freezer can pop it off.
Just let any glass plates cool to room temperature before throwing them in the freezer. Unless you want to buy a new printbed
His knowledge about electricity is soo high, he became immune to it. Lol
He gets high off electricity.
@Xieq-Jimmy- he is immune to death not shock damage
The man has thick rubber shoes for balls
When he gets electrocuted , Electricity apologizes 😂
I remember one farmer who could work on electric fences while they were live. I don’t know how he was able to take it.
Another guy contracts to change a famous brand light bulb and had gotten shocked so many times it done something to his nerves and now he can’t hardly feel getting shocked. Good thing his company retired him!
A truly excellent explanation. I wish this kind of thing was available 30 years ago when I was lecturing this stuff. To be honest, it is even clearer in my mind now. Well done.
Sir I started watching your videos lately. I am a student of engineering and your videos are beyond any measures. Thanks for your hard work sir, you inspire us and keep our interest firm for electronics.
His 11 min video about 3 phase AC made me understand it better than when I took it for 2 months at school.
at school, most of the teacher spend time on calculations
Same, only mine is for the whole semester.
it took me 20 years from the time i first saw 3 phase, to see this video, to actually understand it. and it is clear as day.
Just like sex ed at school. Learnt nothing in 12 weeks but 1 night with the school slut, I was educated :)
I went through a school for electrical engineering, and i found this to be one of the best
lessons on the subject i have ever had the honor to consume.
In Germany all houses have a 3 phase power supply. It is splitted in 3 single phases, but if you are any enthusiast and have for example a CNC machine or car lift in the garage, you can use all 3 phases by making a 3 phase outlet.
Vorteil von unseren Installationen :)
That's freaking awesome.
We have that too at my parent's house. And I think our solar panels output three phased power, not sure about that...
That's genius, things like that are what make Germany awesome, aside from the food.
cokefridger it's a shame houses are only wired for single phase in the states. Probably too expensive for contractors and the power companies to implement
ElectroBOOM shorting something never gets old :D
Techtastisch | Experimente und Lifehacks Oh Hi Techie, wusste Garnicht das du auch ElectroBoom guckst ^^
What about the play on the name ElectroBOOM - the "boom" in shouting caps as in OUCH?
Was ist mit dem Spiel auf den Namen ElectroBOOM - der "boom" beim Schreien von Mützen wie in AUTSCH?
Techtastisch | Experimente und Lifehacks oh ich dachte ich bin der einzige der bei seinen videos an einem lachflash stirbt
LOL du hier ;D
Techtastisch | Experimente und Lifehacks auch hier😅
Had this guy been my teacher in electrical engineering , I wouldn't have missed a single lecture.
We would have made make up classes even on weekends bro
I am a retied electrician and at one time I was lead electrician/engineer for the third highest building in Washington state. With few exceptions, almost every heavy electrical load ran on 3-phase power. We used many VFD's in our air-conditioning plants. I really liked you lecture on 3-phase power and how it works. I have been out of the electrical field for years but your videos are a refreshing reminder of my happy days as a practicing electrician!
You've explained this so much better than they did at my school many years ago.
The advantage of not needing the neutral wires for the combined 0 volts is definitely interesting, I wish they had explained it in this way so it might have stuck.
I like your visualisation with the coaster, a simple explanation of a potentially complex subject.
In fact, it's a little more complicated. The circuit is closed through a winding that does not currently have an "amplitude" (popularly speaking). However, we have other influences, such as hysteresis in the case of inductive loads. Note the case where the fan motor was rotated directly by the three-phase current from the motor. He winced and spun slowly. The fourth wire (zero) is often used in similar applications that have a "star" connection. Of course, the sum of currents or voltages in this three-phase network diagram is 0, but this does not mean the absolute cancellation of the fourth conductor. Very high voltage pylons have this conductor at the very top ...
I have a degree in electrical technology, but I feel like I understand this even better now. You explain things much more clearly than any of my professors did.
You see, college degrees are being phased out. Especially in Washington DC.
@@gyrgrls xD
@@gyrgrls the puns!
I try.
Same here, I finished college last year and have worked in a power plant ever since, my colleagues are good at explaining things but the way electroBOOM explains and demonstrates also helps alot with understanding what is going on in the machinery at work.
08:17 small correction. Three sets of electromagnets placed Mechanically out of phase by 120deg.
Very informative and beautifully explained. Can't imagine how much effort you put into making these wonderful material. Thanks a ton. Lots of love🙏
Good point
Agreed
This is the 1st video of your's that I've seen, and I can't believe I haven't heard of you before. Very good content, and I think you have a very likable personality. Very funny, and very fun to watch! Thank you!
You are in for an electrifying treat.
That's correct... I can't believe that I haven't heard of him before....
Same here, except I just discovered him through the AC vs DC video
yours*
I came here from a compilation of abruptly cut screams. I couldn't find the other original clips but this guy's clip had the channel name and I found him.
I can't believe I was so lucky.
every time you plug or touch something I close my eyes. LOL
bluetorch13 i’m a bit 320m far from laptop while watching tho 😂
bluetorch13 lol same
Yeaa cz it has a 90% chance of exploding
Lol funniest comment
Don't do that, you might miss something hilarious!
I always wondered why doubling up 120 made 208 and not 240 but this makes perfect sense because when the phases shift 120 degrees the peaks and valleys aren’t directly over each other so you don’t get the full peak and valley of the wavelength that you would get at 180 degrees
Just to know - in Europe you have 3 phases at home not only in industrial areas and the voltage is higher - 230V one phase and 400V 3-phase. The higher voltage got a benefit if you have a fixed power-requirement. You need with 115V a wire with the double width because of the line loss the copper wire has. One interesting history fact about transmission lines - 1882 the first transmission line was built with 2 kV DC over 57km. The efficiency was 25%. And in 1891 the first transmission line with 10kV AC over 176km was built. The efficiency was 75%. Today we use in Europe depending on the distance and economy AC transmission lines between 110kV and 1000kV. The most common used are 3 phase 400kV. Because of the weight transmission lines are out of aluminium. In comparison the weight is 55% of a comparable copper-wire with the same AC resistance and line loss.
im in the states... i always thought if i doubled the voltage to everything in my house ut would lower the load and my electric bill!!!!!
@@sdrake74 If you doubled the voltage to everything in your house you would get higher electric bill
@@Nobody-eg4bi And an even higher bill from the fire department.
@@petehiggins33I understand all these things but what is more important is the wattage so you can use higher voltage but you should in that case give a lot less current (amperage), the most important thing that you should never change the wattage
I also have 3 phase connection but noticed not all homes have
No joke, I'm using this video to learn about 3 phase AC currents before my college starts. I've known about Electroboom before college but now, I'm totally hooked! Thank you so much for the videos Mehdi!
Damn…I LOVE your presentation! I went to electronics tech school for two years, studied on my own and worked a a tech. I never quite felt at ease with three phase, the why, the how, and we NEVER had any teacher that was so much fun while still being incredibly informative and even with the joking, there is a very high signal to noise ratio in your teaching! Definitely going to check out your other videos! Thanks!
3:54 I've been trying to explain this with words and graphs and math to some apprentices. Your finger graphic makes so much sense! Thanks.
I dont know why but this is the only implementation of a dab that doesn't sicken me.
What is a dab?
@@spaceghost8995 I refuse to enlighten you and ruin your blissful ignorance.
Hahahaha, 100 percent agree!
I've been a master electrician for 40 years and this is one of my favorite subjects to explain to laymen.
3 phase solves the problem of zero voltage potential and no work being done that occurs twice every cycle of single phase, with 3 phase there is always work being done because the phases overlap by 120 degrees, thereby massively increasing efficiency.
Many years ago there also was 2 phase systems where there were 4 current carrying conductors arranged in 2 sets of two that had to be paired properly, it proved to be more expensive than 3 phase, wasn't as efficient and it was a pain in the posterior so it never caught on. We had an old factory in our city that had ancient machines that ran off of a 3 phase to 2 phase motor/generator converter, I hated working on them but just my luck, I was the only person they could find that understood how the electrical parts worked. The only reason they kept them going was because they were specialized machines that couldn't be replaced.
Can you write my IP exam for me??
@@knowledgegod2635 Love to but I'm a master electrician not an IP expert.
@@MichaelClark-uw7ex we don't have master electricians in canada. only apprentice, journeyman and foreman.
Love the work but hate the schooling.
Hey wait a minute... Maybe we should use DC!
@@knowledgegod2635 uhhh yes we do
Great video, a couple of points.
1 The input power of 3 phase motor with a current of I amp per phase and a phase to is is not 3VI but (sqr rt 3) VI
2 The reason why the motor generator set had a low efficiency was because the magnetic field was just the residual field in the laminations. Full size generator either have a rotating rectifier or slip ring to supply a dc current to the rotor.
In my school we learned about 3 phases current , sometimes paper and pencil can't do that much to make you understand how it works in detail, now I know how it works :)
Love and respect for you🙏
I like working with 3 phase motors as they are much easier to start. Thank you for posting on this very important topic. This subject is something that is used in most businesses as it makes for smoother power output with smaller capacitors on the output of a bridge rectifier.
Nice motors until you connect them out of phase.😅
7:16. Noises made by the driver ... That’s AMAZING!
10:03 😂. The motor was drawing 3 Amps at 10 volts. That was awesome to watch! Mehdi:"aaaaaaaaaa!!!"
this has become one of my favorite channels on YT. Very informative but at the same time super funny and keeps me guessing each time a connection is made or wires touch
The best reason for 3 phase is the fact that when the 3 loads are equal then the power from the system is a constant. In other words the power is NOT modulating at 60Hz like a single phase motor. Rather, the power is not modulating at all. It is a constant.
This means that for a single phase motor you can hear it humming at 60Hz. But for a 3 phase motor (if it was perfectly constructed) you won't hear any hum.
This means nearly no 60Hz vibration and thus the motor lasts longer.
And the torque output of the motor is also a constant which induces less vibration into the load so the load lasts longer.
Some math. Power is a function of the square of the voltage.
Single Phase Power=SIN(alpha)^2 = SIN(2*alpha) which varies with alpha
Three Phase Power=SIN(alpha)^2 + SIN(alpha+120)^2 + SIN(alpha-120)^2 = 1.5 for any alpha
I heard a sawmill operator say exactly what you're talking about with a grinder that used a 300 horsepower electric motor. He said someone was running frozen wood through the grinder, and the force involved caused the ground to shake, but "ou can't hear anything from the motor, so "you can't tell whether or not it's working hard, but it must've been".
It doesent matter *dab on haters.
You will still get Lorentz attractions in the end windings and magnetostriction in the stator core, both of which can cause humming at twice the electrical frequency.
ElectroBOOM: Promotes 3d printer
*breaks*
Sooo his entire channel shows him failing and them has him showing you why he failed and then how to do it properly.
Just like when he shocks himself he broke the 3d printed object ON PURPOSE
Finally a new video! You are the only channel whose videos worth likes before even watching them, because you know good content is coming.
israel24961 , so do yours, but that was not the point.
Very interesting video, I am an electrician on a USCG cutter, we use a wye configuration like all ships.
Funny story: in trouble shooting a generator we took current and voltage readings on the governor actuator control circuit... I did exactly what you did at 3:05 thinking my meter was set for voltage and killed the governor thus killing the generator and the entire ship's power... That's one way to learn a lesson about checking your meter XD
Fantastic ! Your lesson on 3 phase power is 10 times more engaging and 10 times clearer than instruction we had in college.
Seems to me you add the slap-stick comedy for effect... I love it... it works on several levels, as a warning, as a safety briefing, as a “shtick” for comedy, and as a common leveling tool, “see it happens to mee also”... great stuff! The entire video is great... thanks!!!!
LOL@mishaps. But another reason 3-phase systems got expanded a great deal in the early 1900s is because there was an efficient way to rectify the 3-phase current back to DC: the mercury cathode rectifier. These don't work too well with 1-phase AC (the arc gets extinguished on the reverse half of the cycle and is hard to reignite, whereas in a 3-phase rectifier the arc never extinguishes). Remember, there were no high-power silicon diodes back then.
Glass ignitrons like this th-cam.com/video/x-0b-wQnDWY/w-d-xo.html look pretty nice.
(But looking at them will fry your eyes)
Friedrich August Haselwander (3 phase synchonous machines)，Mikhail Dolivo-Dobrovolsky (squirrel cage motor)，Oskar von Miller，John Hopkinson (3 phase distribution).
@10:31 "It's like a self-healing device"🤣🤣🤣🤣
2:36 Ah yes comrade, Distribute equally and balanced
Rayman34128 But that’s not the Soviet Union national anthem, that is the Russian national anthem.
This load belongs to the workers.
@3:05 too late with the tip. It already happened to me... But I was standing on a ladder measuring the light point in the sealing. It was quite the scare... If only I had a camera and a unibrow, it would have made for a nice video.
I did the same but not with main power outlet...it was close...
when i was 14 we had a problem in the house and i tried to measure current in parallel on the main house switch, it was scary as hell. I knew how to do it properly but i was so fed up that i just forgot
Chris Wesseling me too.
Next time don't stick a fork into the plug!
Chris Wesseling I've done it too when i was 14 and got my first multimeter and the meter exploded. I think this thing has happened to everyone.
I have been worrying about my third technical term for my apprenticeship for a good while. You managed to oversimplify the entire intake with one vieo. Thank you.
Here in Poland, we get 240 volt 3 phase in every home. This way wiring can be much thinner and cheaper.
Is that line voltage or phase voltage?
Phase to neutral is 230V, Phase to Phase is 400V, this is common through the most of the Europe
Is it also 50Hz? North America for houses is center tapped 240v 60Hz. 208v 3 phase is used for the apartment/condo buildings.
Yes it is, but the actual parameters of electricity in Poland is like Tesco Value XD
Not everyone has 3 phase power in Poland. It's common in houses, but in older flats it was common to just have one phase installation for each apartment, but it's last mile problem. Usually every building has 3 phase source available.
Although 3 phase is common, there's really no big use for most of us. Only instant water heaters are a common consumer devices that use 3 phases and only high powered ones. There are many 1 or 2 phase heaters.
Induction cookers are probably the main reason why most people needs 3 phase installation, but those cookers only use 2 phases anyway.
I myself have pretty much an industrial installation and I have a few of big 3 phase motors. Just starting them makes you nervous. Loud and powerful.
In Germany we get all 3 phases at every house. So we can power devices which needs 400V. It is pretty neat.
Every country has 3 phases at most houses. It's nothing special in Germany.
That isn't true. The OP is correct. Few countries get all 3 phases to every house. It is most common in Europe. Some houses in 120v countries get 2 phases.
Same in Finland, 3 phases in every house.
Same in czech rep.
Power companies can even supply single phase, and neutral is tied to earth ground. For small houses in the middle of nowhere. So much for the GFCI protection on a hair dryer in a home wired this way.
8:58 "change" was inconspicuous added 😂✌
Was finding Your comment...
@@djsaimkhan Haha cool 😄
@@keinennamen8458 haha
240 AC in Canada (and US) is delivered to the house with the neutral tapped from centre of a local transformer (aka split phase). Having a voltage of 203V suggests there is an apartment building transformer taking in 3 ph and and splitting off 2 phases to apartments. (apt A is red-blue, B is blue black, C is black blue, etc), nominally 208V. In my kitchen, measuring both hots gives 240AC (house), and all single phase.
MOST EPIC DAB ON TH-cam 2:09
10:08 ”I was able to print anything I imagined or wanted. Like my wife!”
I didn't catch that hahahah
That could explain why we never see her, for lots of reasons!
Don't take ite out of context, He said: Like my wife wanted a roof[...] 🤣
First one to say three phase needs 3 FULL BRIDGE RECTIFIER.
There is a special full bridge rectifier design for 3-phase systems. The pulses on them are much nicer
you need only 6 diodes and a lot less caps for three phase. the output voltage is also higher.
how do you get from 1 day ago
The flux capacitor
B6
Understanding 3 phase is an incremental process and your presentation has helped me enormously thank you
1000% better than my teacher
Perhaps get your lecturersto create some sparks or stick wet fingers into mains socket for some laughs.
10000999999990900900.....to infinity times better than my teacher
absolutely
i know its just a joke (mostly lol) but don't be too hard on teachers.
they have to do it live, and they have to do it again and again. Usually to an audience that isn't super stoked to be there.
It's a very different animal
Frosty. You are right, teachers have to explain the same, again and again, but that is their job, if they are going to be a assholes then don’t choose to be a teacher
I've learned more watching this channel than I did in high school.
What does that tell you about high school or even Canadian universities. We are teaching kids and adults the wrong things with horrible robot teachers.
I live in America.
MakoRuu you miss spelled "America" its spelled Merica
advan zvornicanin // You miss spelled school shootings
No shit you didn’t learn this in high school. This is college level material. I learned about this stuff my second year in college.
Again, golden material. well explained. I was aware of a 3-phase motor. Your explanation was better, i wasn't aware the degree of phase impacted the voltage. Thank you for this!!
Now I suddenly understand the Y configuration. sin(x) + sin(x+2pi/3) + sin(x+4pi/3) = 0. Wow! Now I know why the return wire is often left off the diagrams. Decades of confusion cleared up in a few minutes. Subscribed!
It was an excellent refresher even for seasoned electrical engineers.....we learned so much so quickly that it was hard to retain the basics from time to time.........After 25 years working i also found the online HAM radio training to be avtremendous refresher of first two engineering terms. But the learning never stops......three years wrestling with $13000 ETAP software even after three training session proves electrical engineering has no end in sight.
Aye to the Ham radio training; amplifier circuits -> IGBTs etc. I am going for my Ham license soon too.
@@solomonthell7589 what are the perks of a ham license how does it teach electrical engineering, arent they 2 different things? They teach igbt no way...?
Why didnt someone tell me about this guy?
he is ***ZAP**** owwww!
Awesome.
Some homes in Croatia have 3 phases installed. It is used for those water heaters with no tank.
P4 P1 I'm from Croatia. I also have 3 phase installed for my oven
Lol most of European countries uses 3 Phases system, or rather the system is provided but not often used in home-use
Tesla gave it to Croatia first!
I'm in Australia. I have 3 phase to my home to power my well pump
I am in Australia and the houses either side of me have 3 phase. I have one phase so I am limited to about 100A maximum, and it makes me sad sometimes. New houses commonly have central A/C system so will have 3 phase as standard - you'd be crazy to only have 1 phase installed.
That was a great video man. I'm a electrical engineer and It helped me refresh some of the concepts I learnt in college, and also I learn some other things too. It's also crazy how you make a shortcircuit almost every 2 minutes 😅
4 year of electrical engineering yet I forgot everything and had to come here to refresh :(
if the eligibility for jobs/higher-studies have an emphasis on practical knowledge rather than marks; I would be working in an actual engineering lab rather than developing e-commerce websites for undergarments :p
now I come here, watch a couple of videos and smile and then go to sleep :D :D
@@kahuna1247 i had a very good understanding of electricity from a very young age :)
Not everyone can afford higher studies nor all house hold are rich.
If anyone is confused why he has 208 volts but you have 240, houses get 240 volts across a single phase. We get 120 by tapping in the middle of the transformer's secondary winding and that's the neutral wire. Apartments and other large buildings usually bring all 3 phases in, each 120 degrees apart. In each individual apartment only 2 of the phases are used and since they're 120 degrees apart the resulting voltage is 208 volts.
3:06 I did that once, that was the first and that was the last. I am in heaven now.
nice
youtube facilities is available there .
Wow they have internet there too? 😮😮
Thanks for the laugh man made my day
This video really made me appreciate how much of a genius tesla was, with a modern perspective it's easy to see 3-phase ac is the way to go, but to conceptualize these ideas over 100 years ago, and then make them a reality is truly amazing. Truly a genius and a very creative thinker
A good book about Tesla is titled "Telsa , a man out of time " I was amazed at what he created and most times gets no credit it seems .
WOW! Your wife has cake decorating skills that rival the majesty of your unibrow. Impressive!
Alright, let's not get carried away. His wife has some hot shot cake decorating skills for sure. But NOTHING rivals the majesty of that glorious forehead moustache.
3:06 I jumped. Seems I forgot I was watching an ElectroBOOM video.
Don't feel bad I did to I wasn't expecting it
That's his magic
Dude, you make me love being an electrician. Thank you!
I love your way of explaining things. It makes sense, because youre not using fancy words.
My only regret is that I didn't come across this channel sooner. Really great content and excellent delivery. Plus, the "accidents" definitely help to show the dangers of electricity.
7:27 It sounds like a printer motor. Because of the sine waves, and at 7:36, this is why it reminds me of "Crazy Machines - Die Erfinderwerkstatt or Warsztat Wynalazcy". It reminds me of Lasko and SMC oscillating fans with my favorite parts that match when some fan parts are different. SMC oscillating fan motor covers are my favorite when they have teardrop shaped vents in a circle, and the Lasko fan motor covers are my favorite when they have arched vents on top and horizontal vents on the bottom. The guard nuts, rectangular mountain slanted oscillating knobs, and if applicable, the "0-3-2-1" marking on the mechanical speed control on top of the motor cover unless it has a remote, which in that case, it'll be on the front of the fan (and may have a timer) are also my favorite, but it depends on what parts are intact.
Hello fam! Dab on haters!! Sub to the ElectroBOOM subreddit: www.reddit.com/r/electroboom
ElectroBOOM hey Mehdi, what about your other channel? That you were going to make?
I've once been in the Museum of Electrotechnics in Budapest, Hungary(Yea, I'm Hungarian), where I've seen an interesting experiment with rotating magnetic fields. They had a circular plate with a frame, where they put an egg made of copper(or iron?), then they applied the rotating field, and the egg started spinning, and stud up on its top. Also it could turn a watches pointer, when placed in the filed. Maybe you should try making something like this.
Almost there!
Hey Mehdi can you give me a 3D printer
Hey please giveaway those brushless motors to me😁😁
Small error at 9:55 - the BLDC motor is in fact a three-phase synchronous motor and NOT an induction motor. The rotor field is the result of magnets and NOT induced from the stator.
I came to comment section just to make sure this comment excists.
Studied AC theory and LRC stuff in A level phys many years ago. Now I get it. Especially the redundancy of earth wire and how induction motor field orientation drives the rotor spindle.
in canada we run 2 phases to each home????
No, its a single phase. A split phase to be precise. Every other breaker on the CB panel is the opposite side of that single phase. To get 240v you simply run tap across 2 consecutive breakers instead of using one and a neutral.
Maybe in apartments it is different, but in houses it a single phase.
Yes: He's probably in an apartment or condo building that is wired up with commercial 3-phase power. Every unit would be handed out 2 phases in a round-robin fashion to try and keep it balanced. 208 volts across the two legs is a dead giveaway for 3 phase power since if he were on split-phase it'd be 240.
And over here, if I want 240v, I just use any outlet that i want to.
Ah, I thought it was split phase for the home as well. Thanks to Mike Pepe i'm starting to get my head around to understanding 208 volts we use at work, kinda!
@@glennfrancis9031 In the US and Canada there is a wide variety of domestic and light industrial electrical supplies, so you can't assume anything in particular.
The 'most common' domestic setup is that each household gets a single 240V phase, via a centre-tapped-and-grounded transformer so it looks like two 120V supplies.
The full 240V is then available by connecting a load across the two live conductors, instead of between live and neutral.
Some place instead get actual three-phase - more common out of the city where farmers etc want to run bigger kit like welders.
But wait! There's two types of three-phase - star (wye) and delta.
Star/Wye has a neutral at the centre, as described in the video - 'nominal volts' (120V) between any Live and Neutral, and a higher voltage (208V) between any two lives.
Delta has no neutral, and is instead nominal volts between lives. You connect your load between the two lives. In the US it's generally either 120V or 240V phase-to-phase.
But wait! There's a third type of three-phase - "wild leg"
In "wild leg", you start with a normal delta three-phase, but centre-tap one of the phases (and usually ground it).
In the US, this is used to give 120V, 240 and 208V supplies from the same transformer: Centre-tap between L1 and L2, call that tap the 'neutral'.
If L1 to L2 is 240V, L1 to 'neutral' is 120V, L2 to N is 120V, L3 to L1 is 240V, L3 to L2 is 240V, L3 to neutral is 208V.
So just because you've got a 208V phase, it doesn't mean you've got 3-phase Star/Wye
Beware, brushless DC is not the same as induction AC. Both work with 3 phase AC but one use permanent magnet and the other use ferromagnetic bars that are polarised with the coils when the motor starts. That's why when you use induction motor, you have to use a good electric variator to polarise your bars with minimum power loss. That is also why we talk about synchronic and asynchronic motors
In Sweden we have 3 phase AC to every single house (and many apartments too). That way we can install 3 phase motors in the house. For example, the heater and boiler is 3 phase, and the pump in our spa bath is 3 phase. Some ovens with stove are also 3 phase. Many electric car chargers are 3 phase as well.
Very well explained that - for energy transmission 3 phase is - while using only 3 wires for balanced load between phases- is most energy and cost (copper use) effective!
And there is more: single phase driven motors have torque variation during each turn while 3 phase motor have constant torque resulting in less noise and wear! Another advantage is you don't need one or 2 capacitors to create a rotating field which makes 3 phase systems much more reliable as capacitors break down much faster than any copper wire or steel core. Add permanent magnet rotor and you have synchronous motor even more accurate to control RPM. or use motor as synchronous capacitor to improve cos phi..Several 3 phase asynchronous motors born before the 2nd worldwar still work perfectly which is testiment for the reliability of the 3 phase system without electronics.(to reduce in rush current for big moters star/triangle switches were used. To change rotation direction just swap any 2 of the 3 phases. Switching 3 phase is easy as each phase has it zero crossings albeit 120 degrees after eachother. And if you really need a DC voltage you just need 6 diodes - good for charging EVs- as you get much less ripple than a rectified single phase which - without stupid capacitor - touches zero twice per period (100 times per second at 50Hz).. civilized Europe (and many other regions) has standardised its consumer voltages to 3 phase 240V (single phase to neutral) and 400V between any 2 of the 3 phases.. just some more advantages of 3 phase systems, Wessel
Furthermore:
If you want speed control nowadays 3 phase frequency inverters from 10Hz to 200Hz are easily available allowing decent torque control from start up at 10 Hz to above 10000 RPM for the very reliable 3 phase asynchronous motors...
I am a simple man.
I see a EBoom video, I click I smile and I get shocked.
Quit watching this and make Half-Life 3.
I see EBoom video, I click I make EBoom project I get shocked and I smile. :)
Here in Brazil some houses with larger need for load, can use 3 phases system!
How is this guy still alive?
College Education, thats how :D
Because he isn't doing it in Europe. In NA they only have kiddy power in the outlets.
He's Electro-Man!
He knows what he's doing.
Gods cannot die
I think a correction is required here: 3 phases electricity on 3 wires HAS NOT BEEN INVENTED BY TESLA. Tesla invented a 3 phases motor using 6 wires and never thought about using only 3 wires. That invention has been made by Dolivo-Dobrovsky. He is also the one who designed the wye and delta arrangements and figured out a easy way to raise and lower the voltage for long distance transportation of electricity. Definitely not Tesla.
Maybe it's too late to ask, but could you eventually make a video explaining why we stop at 3 phases? It feels intuitive to think (although I know it's wrong) that adding more phases, all equally lagging or leading each other, could improve power transmission even more than with a 3 phase system. I know it envolves the math behind it, because the voltage behaves as a sine wave, and it peaks at a certain degree, but I'd love to hear the full explanation with the charisma and sparks of THE RECTIFIER
Three phase is the most cost effective option, and at the same time efficient
Nicola Tesla actually designed 2,3,4,6 phase systems (I can't remember if 5 and 7 phase were tried as well but it seems like it) but settled on the 3 phase system I believe because the math works out better . Large AC generators have the stator windings arranged around the stator frame in series to increase output voltage with duplicate parallel windings to increase KVA output capacity instead of adding additional phases .
3,6,9 might be possible. By theory if 3 phase added up to 0V. Then adding up another 3 phase with the same shifted phase time at any starting point should be ok. But the need to calculate the imbalance neutral line to support peak voltage if a number of the load are turned off (disconnected) or any imbalanced load.
4:10 see in the batter maker reflection
he runs away
Apparently my proffessor in electronics says that the real inventor of the 3 phase AC was actually a guy from Riga Technical University, his name is Mikhail Dolivo-Dobrovolsky, he had run different prototypes and tests before this discovery blew up, check out. As an article from my university says:
The globally known engineer and inventor Mikhail Dolivo-Dobrovolsky studied chemistry at the Riga Polytechnicum for 3 years. Later, he went to Germany and worked for AEG company. During that time, he has invented and constructed the first three-phase alternating current generator with rotating magnet field capacity of 2.2 kW. During the World Electrotechnical Exhibition in Frankfurt, in 1891, for the first time ever he demonstrated transfer of three-phase electric power on long distances. The demonstration of the effectiveness of three-phase power marked the end of discussions about most suitable currents. This invention marked a significant turning point in the history of technology and was one of the most important events in the history of electricity.
fake
Three phase AC was not invented by any single person, but by Mikhail Dolivo-Dobrovolsky, Nikola Tesla, Galileo Ferraris, and Jonas Wenström. All of them supplied an important part to the creation of polyphase power.
Wenström's name is famous because hes the guy that Edison stole the carbon bulb filament idea from (neither of them invented the light bulb), and Ferraris is the guy that invented the alternator. Tesla's biggest contribution to 3 phase AC may be, in fact, making sure Edison stole 3 phase AC and claimed it as his own (after being thoroughly embarrassed after the whole AC vs DC showdown between Tesla and Edison years earlier) , thus popularizing it worldwide. None of the four had the resources to make this a commercially viable system ready for mass adoption.
@@Diablo-D3 Ferraris was the first to invent the induction wire-wound motor, Tesla copied it two year later and was so cheeky, that he sued Ferraris for patent rights (trial finished after Ferraris death with verdict satisfactionary for Tesla). Single-phase AC was used in Europe - although in small scale - in 1878. Tesla's AC generator was built with slip rings to collect the current - while the other design (Dobrovolsky) used modern approach witch stator winding fed to step-up three-leg transformer. probably the greatest invention of Dobrovolsky was neither generator, transformer nor squirell-cage rotor (which ironically powers most "Tesla" cars) but phasemeter, that allowed to easily synchronise many generators and create coordinated electric grid as we know it nowadays.
@@brylozketrzyn I wonder if Mehdi should make an entire video about the history of electricity and cover all of this. I'm pretty sure he couldn't blow anything up in it. Reasonably sure.
@@brylozketrzyn Your italian hero looked at the induction motor as a mere curiosity, when he saw the cash potential he tried to have a grab. So, don't bullshit us with Tesla being cheeky ! They where both inventors and must be grateful that they even existed. Tesla went the extra mile to prove his ideas, Ferraris stayed in Italy. Big difference !
This guy is hilarious. Using his videos for my new ebook on how to power a coffee truck. Love his work!
did you forget to say "change" here 8:57 !?
Yes he...... did.....
I was going to comment this, it sounds like he probably said "moved" but wanted change instead, or something.
Save The Rohingya lol
I love how I can learn and laugh at the same time. 👍
3:15 .. haha, happened to me..more than once ;) At least in the 20A setting, so the meter's fuse is still intact ;p
I love how you leave all the mistakes made in the videos. I highly respect that genuinity
its the first time I fully understood the concept behind it..............thank you
You are cool bro.... full of energy... your students will never get bored..
And they'll leave full anxiety wondering when the teacher will finally fry himself.
If you knock yourself out one day, who's going to upload the video??? 😮😉
This is the very 1st video I watch from this channel which I get A LOT of informtion, very technical. Hope to have more detailed videos in the future from this channel. Today I sub to your channel 😁.
Hello. Finally a new awesome video. I almost forgot about this channel until I saw a notifications also good graphics.
I am subscribing because your just too funny. THANKS
His too funny what?
@@CsharpPreza when he gets electrocuted, scared, etc.
@@alfa-psi ????
He knows what he's doing...Those are not accidents....they are staged to make the video funny. Like "reality TV"....everything is fake.....nothing about reality.
@Joe Casson "They are completely different words." not "There are completely different words."
“Its like a self healing device” hahaha
Outstanding video!!!!! You can work an oscilloscope as well as a DVM and still look respectable! :)
In every apartment I have ever lived in before finally becoming a homeowner here in the United States, the "hot to hot" voltage was *always* 205-210 (which reflects the 120 degree phase difference) instead of 230-240 volts (which reflects the 180 degree phase difference almost always seen in standalone residential houses).
The reason why builders do this for apartments is that to supply center-tapped 120/240 volts from a common single phase transformer for, say, 300 apartment units spread across 10 or more separate buildings requires significantly more cable (number of plus size of conductors plus the associated labor) than the equivalent three phase system to deliver the same power. Installation costs alone would be $100,000 or more difference.
A second reason is that the local utility company *encourages* three phase usage to keep the phases balanced. Without this, using a large 1000 kVA single phase transformer would require *two* additional apartment complexes each using the other phases on the same circuit (often on the same street) all running at equivalent power levels.
So our 300-apartment complex example will still have its two phase load center in each apartment. First group of 100 apartments would be Phase A and Phase B hot-to-hot. The second group - Phase B and Phase C. The third group would be Phase A and Phase C. Nominal voltage is 120 * 1.732 = 208 volts. Most of the smaller ranges and dryers marketed for apartment use are designed to function at either voltage but the lower voltage when applied means the oven will not get nearly as warm since you have 25% less power going to the oven. [The surface heating elements on most smaller and older ranges still use 120 anyway so no loss there.]
If electric heat is a factor, all that means is either a 208-volt rated baseboard heater or install 240-volt heaters and the customer will wait longer for the room to warm up using the lower voltage. The thermostat works the same way either way.
I'm not sure - but in comments on Technology connections channel someone said that in reality on 208V you have like 86.7% of power of 240V. Which would make sense given that 208/240 = 86.7%. Then again I'm not sure if there isn't something that would reduce it (current? Should be the same, but 120 degree shifted phases don't cancel each other out - so there might be some losses there). Now I have to go and rewatch that video.
Of course - this depends on whether the appliance was designed originally for 208V or is just a 240V appliance that can work with 208V. In first case you're closer to 86.7% in latter to 75% - because wattage goes with the square of Voltage. But if you optimize - you can regain some of efficiency (not in terms of raw power of course) - so it mostly depends if what you need more is power or current.