There are two more ways to check which one is the best generator: - By shorting motor wires and manually spinning the shaft, the more resistance you have turning it, the more power it generates. - The electroboom way: just put motor wires in your mouth and spin the shaft, the more painful motor is the best generator : )
I find electroboom to be too cynical and a bit of an ass. He claims everything is fake even when the basic principles behind some ideas are legit if not fully functioning. The guy may know some stuff but personally I find he talks out of his ass to inflate his own ego versus trying to educate people.
@@TeamFortress2Iscool Someday we may find a way to take energy from the atmosphere and get close to free energy but like I said just because it aint likely doesnt mean these guys arent onto something and Electroboom is the same type of cynical that holds back breakthroughs
Enjoyable experiment, but I disagree with your conclusion. A gearbox is rarely a good option for a generator project, it wastes power and makes noise. The real answer is to disassemble and re-wind the BDLC motor for a much lower kV and this also opens the possibility of changing from star to delta winding, which may suit a charge controller for a wind turbine better. Idea for your next video perhaps..??!
Solution is motor multipole rotor. Low-RPM generators are often multipole, including automotive alternator, which has about 10 poles. That's reason why stepper works so well, because it's basically multipole BLDC motor
The general conclusion might be right, but what the biggest flaw was in this analysis is that you did not use a variable load. All these motor types want to put out a certain voltage according to their speed and a certain current according to their torque. If you dont draw the appropriate current for a given rotation speed, you are either drawing too little current and not much of the available energy is really converted into electrical power whereas mechanical friction is not reduced. Or you are drawing too much current and your winding losses are bigger than they should be. Each motor has an optimal current draw depending on speed en motor constant, but if you use a power resistor you effectively fix the current for each voltage, meaning that this is partially an experiment testing what motor constant is best suited for using with the fixed resistor. Therefore you should ideally have a dc-dc converter in order to transform your load to that of the optimal value as seen by your generator.
Great Scott! I made some discoveries after watching your video and playing around with a DIY windmill for driving garden lights. The efficiency of a stepper as a generator, can be somewhat improved by using a three-phase rectifier instead of a double full diode bridge. This is because a three phase rectifier uses 6 diodes instead of 8! Other than that I found that DIY diode bridges do not perform as well as packaged ones, maybe im just using some bad diodes...
you should do a whole vide on the Odrive. the things it is capable of are insane. The idea of using a BLDC motor as a stepper with the accuracy of a stepper and the torque of a BLDC is pretty cool.
Hey, I think that the DC motor is easiest to use in a beginner's project simply because it already outputs DC and that parts to couple the shaft are easy to find.
Its strange to see the BLDC having such a low efficiency, since they are basicly the same type of generators used in big power stations. They should be able to reach efficiencies up to 99%. Here are 2 Ideas what when wrong: 1) The rectifier diodes give a huge loss due to their forward bias voltage. Around 1.4V lost on the diodes. If we go with the 2V Output Voltage that means roughly 3.4V were at the input, which gives a huge efficiency boost. But its still relatively low. why? 2) The mechanical losses are huge in this system, especially with a gearbox. A good test to see how big these losses are is to disconnect the electrical load and then record the power consumed. If you put 6.8W in with the electric load attached, but say 4W without the load, you have mostly mechanical losses which needs to be taken into account. In principle most motors can be modelled to a good approximation with an a friction element which power loss is proportional to the shaft speed, an ideal generator which converts the rotational power to electrical power (to be precise: it generates an output voltage based in the input speed and generates an input breaking torque based on the output current) and an internal resistance to model the electrical losses, mostly only depending on current. If you vary the load while keeping the shaft speed constant you can estimate this internal resistance (by taking measurements at different currents and recording the voltage). Same goes for the mechanical losses by using a fixed electrical current sink (to keep the electric losses constant, even zero current aka open circuit works here) and looking at the input power. By performing all these steps in various configurations (with generator, without generator, with load, without load, etc) you should be able to get all parameters (mechanical losses P/w, motor constant k, electrical losses R) for both motors/generators. Also it might be possible to get a "dumb" esc (one which does not measure current but just uses the BEMF) to trick it into behaving as a generator-controller. So instead of taking current from the supply to turn the motor it would slow down the motor but feeding back current into the supply. That way you eleminate the diode losses and have a more reasonable DC voltage level.
a VESC can actually act as an Active MOSFET rectifier. The only downside is that the VESC needs initial Bus voltage to power up before the generator is producing power. I've done some experiments on my TH-cam channel
@@gotbread2 those aren't getting that high efficiency either. Best you are getting is around 90-96%, depending on the system. And that's a really well designed system
I use the Gimbal brushless motors as these range in the 30-50kV range. I use these on my Lenz2 3D printed wind turbine, and at 150rpm with a 5:1 belt drive I get something in the order of 30 Volts. I am currently using the Hobbyking 6508 Gimbal motor which is about 30 euros. If I want more it gets quite a bit more expensive at 50-90 euros for a 85 or 90mm stator. I also drive these with a full bridge rectifier for 3 phase into a grid tie inverter. The drawback of the gimbal motors is the high resistance of ~10 Ohm, so you need more then 20 Volts to get decent power out. So far I've seen a peak of 34Watts.
I did some tests many years ago with brushed tape drive motors, and simply connecting one to the other allowed one to drive the other at better than 10:8 rpm, so ten turns of the generator gave 8 turns of the identical motor from close to zero rpm, higher than 100rpm it reached 9:1. Those motors were about as good a any brushed motor can get, and I didn't measure torque loss, but it still proved the efficiency to be close to perfect. I also made a small charger system for a stationary engine using a BLDC motor, and got surprisingly good current and voltage (~60 watts) with 3600 rpm speed.
I had a little play with stepper motors as generators. The best circuit for a motor with 2 coils i figured out is one bridge rectifier with both the coils in series connected instead of one. At the middle node of the coils connect a relative big, low esr, low voltage loss capacitor and connect the other end of that capacitor to plus or minus of the battery, depending on what you prefer. Instead of a full bridge rectifier for one coil (and then maybe putting the outputs in series), now each coil has its own two seperate pair of half bridge rectifiers (Delon circuit), what is somehow paralleled to each other. A pair of half bridge rectifiers puts the positive and negative part of the ac input in series and creates a virtual mass, while a full bridge rectifier puts them in parallel. That also means, if seperate diodes are used,... two coils of a stepper, each with a pair of half bridge rectifiers and caps and that in series, we can even reach >=4 times the voltage of a single full bridge rectified coil, reduce losses and parts we need. by using 6 diodes and 3 caps, it is possible to have two Delon circuits in series and parallel at the same time to make maximum usage of the two coils of a stepper. something to draw...
Thanks for this!... I was just about to run the same kind of testing for my wind turbine project. Now I don't need to! One thing I have discovered about stepper motors (which I've been using... was considering a BLDC but after your video, no need) is that a NEMA23 generates a lot more power than a NEMA17 at low RPM's. I'm getting 9 watts from my wind turbine at the moment in field tests. I believe the reason that steppers work so well is because they have a kind of "magnetic gearing" because of the 'teeth' on the stator and poles that effectively multiplies the number of real coils. It's all about the dB/dt. (change in magnetic flux over time)
Thanks for doing this, I don't have an oscilloscope. Looks like getting much energy out of these small motors is difficult. I will look to my solar panel for trying to generate DC power.
Luka Voglar Because there are usually no sources, just STL so it's pretty hard to change it. 10 seconds of drilling vs 20 mins of developing own coupler, basic economics.
@@HungrysitesRu It's literally a cylinder with a central hole and 4 lateral holes.. Even without downloading anything you can do it in 3 minutes in any CAD software, it's literally that simple :/
I don't longer go to school, but im still learning from the new generations at 50 years i keep asking myself how come i didn't think about the Joule thief before lol thats one the best thing of the human been NEVER STOP LEARNING, NEVER STOP DISCOVERING WHILE INVENTING.
I don't understand some of these staff because i am commerce student. But i love your every video and your experiment. I have so much interest in electronics.
This is perfect just what I needed to see! I am putting a motor on a wind turbine I am designing and spinning the motor with the turbine will turn it into a generator and I wanted to know what motor to use! Perfect timing
Why do you go to church? Some dude from out of this world wrote a love letter to all men with guidelines on how to not fudge up our lives and find the source of life itself, Jesus Christ. God born as man, to live a sinless life, to be an alter sacrifice, to pay for all the sin in the world. To save all mankind from evil, death suffering. Also to learn love and spread this message of hope to the world, Jesus died on the cross for our sins. We are free to know God now, personally.
I don’t know how I got here. I was a chemE major. I like physics. I like making things. Now all I do is watch videos on TH-cam about electricity and motors.
I honestly think that DC Motors are the best option because its simple and I think well constructed. I would use a DC motor for a wind turbine to generate electricity easily.
I've done similar experiments and reached about the same conclusion, BUT there is a problem with the stepper that I found. Try spinning the stepper under load and you will notice that the faster you spin it, the more breaking torque it produces. This is to be expected and is great as it fights over-spinning of your wind turbine for example...... however if you keep increasing the speed, there seems to be a point at which the breaking torque greatly reduces and the stepper generator spins out of control. I'm not sure how to explain it, but I think it has something to do with how the steppers are limited in max speed. I don't know at what rpm that happens, but it happens and it's weird. Just food for thought and further experimentation.
Just wanted to let you know GreatScott, I ordered my first PCB's recently and of course immediately thought of JLCPCB from your videos, im glad to say they shipped within 2 days and and arrived very quickly. The quality is fantastic! I had a few different designs and they are all flawless! Im so glad your sponsored by a company that actually has really good products. Thanks agagin and keep up the good content
Just completed the break-in period and so far the unit is operating perfectly th-cam.com/users/postUgkxOTeIs0vv4_9B5hsmnLsk9r930uDQLu_Y . I was amazed by just how quiet this little guy is. I kept having to walk down the driveway to the generator to make sure it was still running. In fact, the most annoying noise coming from the set-up is a high-pitched chirping coming from the pressure regulator on the propane line. I suppose it's possible my other propane-powered generator's pressure regulator is making the same noise, but the generator itself is so loud I've never noticed it. Build quality so far is excellent. My only nit is the service panel is a little tricky to remove. I feel like I might break off one of the plastic tabs when bending it back. I probably just need to work out the technique, so will not hold it against Champion.Next week I intend to fully load the unit to charge a large battery pack and will update this review if there's any problem (3000W continuous load vs a rated 3100W capacity while using propane). Absent any trouble there, I'm 100% pleased with this purchase.
Hi Scott, seeing this, btw a great video as always, I was wondering: how could you control the output of a generator in a DIY project? What if the load isn't constant?
I just got an idea. Building a pedal powered ebike with a generator in the crank, instead of a chain drive, derailleurs and freewheeling mechanism. Could this be more efficient, since there would be fewer mechanical parts? It would also be really interesting to try to build an electronic substitute for a gearbox using a VFD.
Thank you for this great video. The shaft coupling made by 3D printing is not suitable cause it does not help when the two motors axes are not aligned, while the original metal one does because it has these cracks. Because of this the vibration happens when you connected the brushless motor.
It would have been nice to see induction (3ph) motors tested. They are about equal to BLDC motors but may require being energized before producing energy.
I agree with the conclusion, but your testing with a geared DC motor was a bad example, so the whole experiment was kinda unrelated to your final opinion...
Hadinos Sanosam yes, that muddied the waters. The other systems have losses from conversion to dc which the brushed motor doesn't. It's performance here was surprisingly bad.
:) I like your videos alot. Only a little tip I'm also a seckond language english speaker so I'm really not bullying you about language skill but I think its always good to work on vocabulary so I suggest you try to find some synonyms for words like thus and utilize to use. Keep up the good work!
It is unfair to ignore the mechanical loss of the gearbox. Stepper motor looks like a winner because it operates at low speed and virtually no mechanical loss. Perhaps you can use 2 identical motors, one as motor and another one as generator. If both shares the same energy conversion efficiency, x/100 and x/100, the total efficiency will be like n = (x/100)*(x/100) and x = √(10000n), ignoring rectifier loss. That way will be much more accurate.
best generator is the drain pump from your washing machine, can get 1000volts turning with a small dc motor. check it out. its puts out a weird power that flows on the outside of the insulation during some of my builds, but a fairly friendly power unlike the wall socket.
Though I have learned a lot from your channel, love watching all of your videos but now your videos are becoming more about failures and less of completed projects. I appreciate the effort though. Good for beginner hobbyist though.
BLDC motors are a special form of synchronous motor (permanent magnet). Most industrial generators are some form of doubly fed synchronous motor/generator. That's why cars use an alternator, it's a specialized form of a doubly fed synchronous motor/generator.
if you made a free energy generator, send it to me so i can prove you it's false, OR, send it to electroboom, then you will feel humiliated for your whole life lol
agreed but it gives rise to a more indepth question , i would have thought a dc motor direct drive would be the least resistance , least electronic / highest output
Can you make a whole video on the application of a stepper motor as a generator? And what do you think are the advantages and disadvantages of it on a proper generator?
I understand the complication if spinning al 3 motors at the same RPM so you can get apples-apples comparisons, but once you discovered that the DC motor was a gear motor, you should have scrapped the results and started over again because your results were wildly off due to the gear multiplication of the brushed motor.
Can you do video about lamp types and their components like balasts starters and other stuff. Maybe compare lamps? Like Sodium vs Mercury or something similar?
Low KV brushless motors ranges around $100... the cheap brushless motors with gearboxes require 20-30lbs of brute force to turn the 100kv brushless motors......
It would have been quite interesting to see what happens if the BDLC Motor(Generator) was connected with the other motor more permanently, so that it would be possible to run it on higher speeds
Power measurement should have been done by using an optical tachometer and putting the motors on a reaction torque-arm with a scale to measure the torque. Otherwise, really appreciate the video and the work you put in here !
I'd say it also depends on the application, there's people here in TH-cam that do wind turbines with LEDs, in that case the size, weight and less torque makes small DC motors ideal for the job.
i just use 24 pedal assist and gears with chain then i connect motor to motor so i watched your video for motor efficiency but it doesn't matter as long as it make more then the original 24 volts i am happy. i win. i got 32 volts with two not so good ones.
try an induction generator experiment, get an induction motor, get it running, apply more torque to the shaft that essentially forces the motor to have a positive slip, this makes the motor output real power and take in reactive power, large wind turbines use this
So on bldc perhaps the efficency is somewhat proportional to the rpm. I use regenerative braking and the controller handles the rectification and dc conversion. On average my output current is between 50-75% of the input for a similar speed.
I think the best stays the BLDC, because it produces a three phase output, which can be more easily transported and used by asynchronous motors, but of course I'm placed in industrial and mass electric production context
so if not mistaken. more RPM is favored over high torque? you only want enough torque to overcome the magnetic attraction as the magnets pass the coils. perhaps slightly more to maybe steady the voltage supply?
A simple permanent magnet synchronous machine (which is pretty much exactly the same thing as a BLDC motor) is best for simple and small generator applications. It has the least losses and the best frequency stability.
Anybody got a good source for BLDC Motor gearboxes?
no
GreatScott! I made 220v dc with a printer stepper motor and a full bridge rectifier
GreatScott! I shall say Aliexpress
3d printer / einfach drucken
how does an AC get infinite power?
As a mechanical engineer, I love your videos. Just simple enough to make sense to my little brain, but complicated enough to give me new ideas.
There are two more ways to check which one is the best generator:
- By shorting motor wires and manually spinning the shaft, the more resistance you have turning it, the more power it generates.
- The electroboom way: just put motor wires in your mouth and spin the shaft, the more painful motor is the best generator : )
That's definitely something Mehdi would actually do. 😂
after the second step either you are dead or lost your sense of taste
@mabedinia4 If you manually turn the shaft, the risk is almost null to get hurt
I hear 'Full bridge rectifier' as 'FOOL BRIDGE RECTIFIER' lol that too in caps :P thanks electro boom :D
Nah, Big Clive has it right, Full Bridge Rectum Fryer
Tech Guy Charlie hi
I find electroboom to be too cynical and a bit of an ass. He claims everything is fake even when the basic principles behind some ideas are legit if not fully functioning. The guy may know some stuff but personally I find he talks out of his ass to inflate his own ego versus trying to educate people.
@@joepoelmans5910 sounds like this guy believes in free energy
@@TeamFortress2Iscool Someday we may find a way to take energy from the atmosphere and get close to free energy but like I said just because it aint likely doesnt mean these guys arent onto something and Electroboom is the same type of cynical that holds back breakthroughs
4:12 FULL BRIDGE RECTIFIAA!!!!!!!!
great rectiifireee
it will burn your ass...LOL
ABID Inc. It‘s not a single diode...
It's not a single diode rectifia,it's a Fool bridge Rectifiaa
Full bridge rectumfryer
Wrong channel broo
_FUULLLLL BRID..._ *sechspuls Brückenschaltung*
@@Adventures_EC He is
Jo
EVEN FULLER BRIDGE RECTIFIER
...ᵒʳ 'ᵉᶠᵇʳ' ᶠᵒʳ ˢʰᵒʳᵗ.
Enjoyable experiment, but I disagree with your conclusion. A gearbox is rarely a good option for a generator project, it wastes power and makes noise. The real answer is to disassemble and re-wind the BDLC motor for a much lower kV and this also opens the possibility of changing from star to delta winding, which may suit a charge controller for a wind turbine better. Idea for your next video perhaps..??!
I'm a little confused on how the gearbox works in reverse.
so that's the only reason why the dc had a higher output?
LoL... wind turbines uses gearbox as well :/
Solution is motor multipole rotor. Low-RPM generators are often multipole, including automotive alternator, which has about 10 poles.
That's reason why stepper works so well, because it's basically multipole BLDC motor
I disagree, rewinding a Bldc by hand is not worth the minuscule efficiency difference between stepper motors.
The general conclusion might be right, but what the biggest flaw was in this analysis is that you did not use a variable load. All these motor types want to put out a certain voltage according to their speed and a certain current according to their torque. If you dont draw the appropriate current for a given rotation speed, you are either drawing too little current and not much of the available energy is really converted into electrical power whereas mechanical friction is not reduced. Or you are drawing too much current and your winding losses are bigger than they should be. Each motor has an optimal current draw depending on speed en motor constant, but if you use a power resistor you effectively fix the current for each voltage, meaning that this is partially an experiment testing what motor constant is best suited for using with the fixed resistor. Therefore you should ideally have a dc-dc converter in order to transform your load to that of the optimal value as seen by your generator.
You are right!
Great Scott! I made some discoveries after watching your video and playing around with a DIY windmill for driving garden lights.
The efficiency of a stepper as a generator, can be somewhat improved by using a three-phase rectifier instead of a double full diode bridge. This is because a three phase rectifier uses 6 diodes instead of 8!
Other than that I found that DIY diode bridges do not perform as well as packaged ones, maybe im just using some bad diodes...
jaja, die sechs-puls-brückenschaltung.
wer kenns sie nicht...😂👍
but as always: fantasic video!
mine ing hab ich auch bemerkt
#aura
@@thedavidcraft8033 :D
Moin
Ich kenns
you should do a whole vide on the Odrive. the things it is capable of are insane. The idea of using a BLDC motor as a stepper with the accuracy of a stepper and the torque of a BLDC is pretty cool.
Hey, I think that the DC motor is easiest to use in a beginner's project simply because it already outputs DC and that parts to couple the shaft are easy to find.
4:37 if you see as German an English video and hear there suddenly a German word :)
Its strange to see the BLDC having such a low efficiency, since they are basicly the same type of generators used in big power stations. They should be able to reach efficiencies up to 99%. Here are 2 Ideas what when wrong:
1) The rectifier diodes give a huge loss due to their forward bias voltage. Around 1.4V lost on the diodes. If we go with the 2V Output Voltage that means roughly 3.4V were at the input, which gives a huge efficiency boost. But its still relatively low. why?
2) The mechanical losses are huge in this system, especially with a gearbox. A good test to see how big these losses are is to disconnect the electrical load and then record the power consumed. If you put 6.8W in with the electric load attached, but say 4W without the load, you have mostly mechanical losses which needs to be taken into account.
In principle most motors can be modelled to a good approximation with an a friction element which power loss is proportional to the shaft speed, an ideal generator which converts the rotational power to electrical power (to be precise: it generates an output voltage based in the input speed and generates an input breaking torque based on the output current) and an internal resistance to model the electrical losses, mostly only depending on current. If you vary the load while keeping the shaft speed constant you can estimate this internal resistance (by taking measurements at different currents and recording the voltage). Same goes for the mechanical losses by using a fixed electrical current sink (to keep the electric losses constant, even zero current aka open circuit works here) and looking at the input power. By performing all these steps in various configurations (with generator, without generator, with load, without load, etc) you should be able to get all parameters (mechanical losses P/w, motor constant k, electrical losses R) for both motors/generators.
Also it might be possible to get a "dumb" esc (one which does not measure current but just uses the BEMF) to trick it into behaving as a generator-controller. So instead of taking current from the supply to turn the motor it would slow down the motor but feeding back current into the supply. That way you eleminate the diode losses and have a more reasonable DC voltage level.
I think it's because the rpm he span it at was was too slow. It was no way near its maximum efficency point
a VESC can actually act as an Active MOSFET rectifier. The only downside is that the VESC needs initial Bus voltage to power up before the generator is producing power. I've done some experiments on my TH-cam channel
You are not getting a BLDC to 99% efficiency
@@btoiscool The big generators in power plants might disagree
@@gotbread2 those aren't getting that high efficiency either. Best you are getting is around 90-96%, depending on the system. And that's a really well designed system
I use the Gimbal brushless motors as these range in the 30-50kV range. I use these on my Lenz2 3D printed wind turbine, and at 150rpm with a 5:1 belt drive I get something in the order of 30 Volts. I am currently using the Hobbyking 6508 Gimbal motor which is about 30 euros. If I want more it gets quite a bit more expensive at 50-90 euros for a 85 or 90mm stator.
I also drive these with a full bridge rectifier for 3 phase into a grid tie inverter.
The drawback of the gimbal motors is the high resistance of ~10 Ohm, so you need more then 20 Volts to get decent power out. So far I've seen a peak of 34Watts.
I did some tests many years ago with brushed tape drive motors, and simply connecting one to the other allowed one to drive the other at better than 10:8 rpm, so ten turns of the generator gave 8 turns of the identical motor from close to zero rpm, higher than 100rpm it reached 9:1. Those motors were about as good a any brushed motor can get, and I didn't measure torque loss, but it still proved the efficiency to be close to perfect. I also made a small charger system for a stationary engine using a BLDC motor, and got surprisingly good current and voltage (~60 watts) with 3600 rpm speed.
Fantastic, dude! Hand crank project coming? 🤔
Maybe
try it with supercaps
GreatScott! i will watch that or maybe you can use a bike with a big heavy flywheel so the load won't slow you down easily.
I had a little play with stepper motors as generators. The best circuit for a motor with 2 coils i figured out is one bridge rectifier with both the coils in series connected instead of one. At the middle node of the coils connect a relative big, low esr, low voltage loss capacitor and connect the other end of that capacitor to plus or minus of the battery, depending on what you prefer. Instead of a full bridge rectifier for one coil (and then maybe putting the outputs in series), now each coil has its own two seperate pair of half bridge rectifiers (Delon circuit), what is somehow paralleled to each other. A pair of half bridge rectifiers puts the positive and negative part of the ac input in series and creates a virtual mass, while a full bridge rectifier puts them in parallel. That also means, if seperate diodes are used,... two coils of a stepper, each with a pair of half bridge rectifiers and caps and that in series, we can even reach >=4 times the voltage of a single full bridge rectified coil, reduce losses and parts we need. by using 6 diodes and 3 caps, it is possible to have two Delon circuits in series and parallel at the same time to make maximum usage of the two coils of a stepper. something to draw...
Brother you are really greatman
He is really German
Thanks for this!... I was just about to run the same kind of testing for my wind turbine project. Now I don't need to! One thing I have discovered about stepper motors (which I've been using... was considering a BLDC but after your video, no need) is that a NEMA23 generates a lot more power than a NEMA17 at low RPM's. I'm getting 9 watts from my wind turbine at the moment in field tests. I believe the reason that steppers work so well is because they have a kind of "magnetic gearing" because of the 'teeth' on the stator and poles that effectively multiplies the number of real coils. It's all about the dB/dt. (change in magnetic flux over time)
4:39 sorry, but I think you pronounced the full bridge rectifier wrong.. it‘s called „ *FUUUULL BRIDGE RECTIFIERRR* “. Anyways... great video!
Lol
The moment ElectroBOOM liked the video
Felix kfm why do I not get this lmao
Thanks for doing this, I don't have an oscilloscope. Looks like getting much energy out of these small motors is difficult. I will look to my solar panel for trying to generate DC power.
GreatScott!
I would like an episode of DIY or buy generators.
Thanks Scott! Your explanations are clear, accurate and really help in understanding what's going on. Much appreciated! Love your channel.
5:10 Dude, why not just enlarge the hole to 8mm in software lol
Luka Voglar Because there are usually no sources, just STL so it's pretty hard to change it. 10 seconds of drilling vs 20 mins of developing own coupler, basic economics.
@@HungrysitesRu looks like someone forgot to take printing time into account.
@@HungrysitesRu It's literally a cylinder with a central hole and 4 lateral holes.. Even without downloading anything you can do it in 3 minutes in any CAD software, it's literally that simple :/
@@DarkQwerzar maybe he wanted to let us know that these types of 3d printer files are available on the internet or maybe sponsored.
I cant thank you enough, this is going to help me pass my DT gcse this is so helpful thank you sosososososooo much i love this video!
I don't longer go to school, but im still learning from the new generations at 50 years i keep asking myself how come i didn't think about the Joule thief
before lol thats one the best thing of the human been NEVER STOP LEARNING, NEVER STOP DISCOVERING WHILE INVENTING.
Love how we all also watch ElectroBoom.
lol
I don't understand some of these staff because i am commerce student.
But i love your every video and your experiment. I have so much interest in electronics.
I think a 2 phase AC motor would be the best. It is simple like a DC motor, but without mechanical losses or wear and tear.
6 Plus Brückenschaltung 😊 die Aussage war schon überraschend bin ja nur englisch von dir gewohnt. Sehr schön weiter so machen 👍
"would have rotated with an rpm of around 7310" thats quite specific
This is perfect just what I needed to see! I am putting a motor on a wind turbine I am designing and spinning the motor with the turbine will turn it into a generator and I wanted to know what motor to use! Perfect timing
How is this video 22 hours old and it only showed now on notifications I'M SHOOK
Patreon supporters can watch the video a bit earlier.
André Páscoa patreon
Ohh interesting thanks xs
Love these videos GreatScott. Keep up the good work 😀
Your videos safe me from the bordom of church 💯💯💯
David my parents
Why do you go to church? Some dude from out of this world wrote a love letter to all men with guidelines on how to not fudge up our lives and find the source of life itself, Jesus Christ. God born as man, to live a sinless life, to be an alter sacrifice, to pay for all the sin in the world. To save all mankind from evil, death suffering. Also to learn love and spread this message of hope to the world, Jesus died on the cross for our sins. We are free to know God now, personally.
@@RBlatch4d I never said church was bad there is a lot of people at the church didn't go to church when they were a teen....
Love the videos! Although I have no idea what's going on most of the time, you were still able to keep me interested and entertained! Good work!
I don’t know how I got here.
I was a chemE major.
I like physics.
I like making things.
Now all I do is watch videos on TH-cam about electricity and motors.
I honestly think that DC Motors are the best option because its simple and I think well constructed. I would use a DC motor for a wind turbine to generate electricity easily.
Gimme da meetaa
Oh wait,wrong channel,
by the way ,great and clear explanation ,thumbs up from me
M Ram Aneeshwar FUUUULL BRIDGEE RECTIIIIFIERRRRR
Ask this to electroboom
I've done similar experiments and reached about the same conclusion, BUT there is a problem with the stepper that I found.
Try spinning the stepper under load and you will notice that the faster you spin it, the more breaking torque it produces. This is to be expected and is great as it fights over-spinning of your wind turbine for example...... however if you keep increasing the speed, there seems to be a point at which the breaking torque greatly reduces and the stepper generator spins out of control. I'm not sure how to explain it, but I think it has something to do with how the steppers are limited in max speed. I don't know at what rpm that happens, but it happens and it's weird.
Just food for thought and further experimentation.
Maybe,Because-speedIncrease,FrequencyIncrease,ReactanceIncrease,AmperageDecrease,ThenTheBreakingDecrease.So,MaybeAtHighSpeedsTheProducedPowerIsLower.
Thank you electro boom;)
No problem ;-)
Y thank you
Just wanted to let you know GreatScott, I ordered my first PCB's recently and of course immediately thought of JLCPCB from your videos, im glad to say they shipped within 2 days and and arrived very quickly. The quality is fantastic! I had a few different designs and they are all flawless! Im so glad your sponsored by a company that actually has really good products. Thanks agagin and keep up the good content
Just completed the break-in period and so far the unit is operating perfectly th-cam.com/users/postUgkxOTeIs0vv4_9B5hsmnLsk9r930uDQLu_Y . I was amazed by just how quiet this little guy is. I kept having to walk down the driveway to the generator to make sure it was still running. In fact, the most annoying noise coming from the set-up is a high-pitched chirping coming from the pressure regulator on the propane line. I suppose it's possible my other propane-powered generator's pressure regulator is making the same noise, but the generator itself is so loud I've never noticed it. Build quality so far is excellent. My only nit is the service panel is a little tricky to remove. I feel like I might break off one of the plastic tabs when bending it back. I probably just need to work out the technique, so will not hold it against Champion.Next week I intend to fully load the unit to charge a large battery pack and will update this review if there's any problem (3000W continuous load vs a rated 3100W capacity while using propane). Absent any trouble there, I'm 100% pleased with this purchase.
Your an absolute savage with a highlighter pen...
Nice video!
Hi Scott,
seeing this, btw a great video as always, I was wondering: how could you control the output of a generator in a DIY project? What if the load isn't constant?
Voltage Regulator?
Thanks for a comparison test of the three kind of motor to find the most efficient generator
9:33 Yup, that is the right one!
I just got an idea. Building a pedal powered ebike with a generator in the crank, instead of a chain drive, derailleurs and freewheeling mechanism. Could this be more efficient, since there would be fewer mechanical parts? It would also be really interesting to try to build an electronic substitute for a gearbox using a VFD.
Less efficient but has other benefits, I'm about to give it a go.
So basically, go big(in rpm) , or go home.
The Stepper motor seems to be the best option simply due It's sheer number of poles.
Thank you for this great video.
The shaft coupling made by 3D printing is not suitable cause it does not help when the two motors axes are not aligned, while the original metal one does because it has these cracks. Because of this the vibration happens when you connected the brushless motor.
Yeah! I love your videos! Keep up the good work dude
Thanks mate
GreatScott! Anytime matey
It would have been nice to see induction (3ph) motors tested. They are about equal to BLDC motors but may require being energized before producing energy.
I wanted to keep this experiment to hobbyist motors for now. Maybe there will be another video about induction motors.
GreatScott! I would be looking forward to it. Great video otherwise! Have you made any further progress on the DIY ESC?
No big improvements. I am currently working on too many projects and there is a lot going on behind the scenes. Not sure when I get to the ESC again.
I agree with the conclusion, but your testing with a geared DC motor was a bad example, so the whole experiment was kinda unrelated to your final opinion...
Hadinos Sanosam yes, that muddied the waters. The other systems have losses from conversion to dc which the brushed motor doesn't. It's performance here was surprisingly bad.
Another advantage of steppers is that they output AC which can have it's voltage easily raised or lowered.
"so I downloaded another shaft coupler"
Future is really here guys
In 2040:
Mom: what are you doing son?
Me: I'm downloading a new CPU, I'll print it later
:) I like your videos alot. Only a little tip I'm also a seckond language english speaker so I'm really not bullying you about language skill but I think its always good to work on vocabulary so I suggest you try to find some synonyms for words like thus and utilize to use. Keep up the good work!
Lol ich verstehe fast kaum was (nicht weil du Englisch redest) aber es ist interessant was du da machst :D
Nice and informative. I'm really surprised to see how much power was generated from the stepper!
It is unfair to ignore the mechanical loss of the gearbox. Stepper motor looks like a winner because it operates at low speed and virtually no mechanical loss. Perhaps you can use 2 identical motors, one as motor and another one as generator. If both shares the same energy conversion efficiency, x/100 and x/100, the total efficiency will be like n = (x/100)*(x/100) and x = √(10000n), ignoring rectifier loss. That way will be much more accurate.
This was something i was really curious about, thanks!
Nice video like always, but why you can not use the regenerative breaking of the vesc to calculate the power that produce?
Alberto cornejo yep I too had that question
Alberto cornejo It’s a nice video, no doubt about it but, maybe he’s not a fan, most probably due to efficiency.
Sir! Your Handwriting Is Owsom
5:14 *uses a drill to enlarge the holes instead of doing it in Tinkercad
*Me : NO GOD PLS NO NO.... NOOOOOOOOOOOOO
At work we call that "manual CAD"
@@jhwblender the issue it's that he doesnt know how to do it properly
Another Great Project😍😍😍
5:05 is me dealing with life problems
best generator is the drain pump from your washing machine, can get 1000volts turning with a small dc motor. check it out. its puts out a weird power that flows on the outside of the insulation during some of my builds, but a fairly friendly power unlike the wall socket.
Though I have learned a lot from your channel, love watching all of your videos but now your videos are becoming more about failures and less of completed projects. I appreciate the effort though. Good for beginner hobbyist though.
Jawwad Sabir his basics videos are better than some of his project videos
BLDC motors are a special form of synchronous motor (permanent magnet).
Most industrial generators are some form of doubly fed synchronous motor/generator.
That's why cars use an alternator, it's a specialized form of a doubly fed synchronous motor/generator.
I always laugh when people think they discovered something, like attaching a motor to a generator and power back to motor for free energy.
listen bro you are not able to do thes things
if you made a free energy generator, send it to me so i can prove you it's false, OR, send it to electroboom, then you will feel humiliated for your whole life lol
Clearly no one understood what you said
Bro it just the prototype of what he want to do....are you expecting to built a windmill for a TH-cam video?
no, because it's physically IMPOSSIBLE to build a "free energy generator"
go watch electroboom's video on it ffs
Many thanks for making this video..which motor works best for grinder & grass cutter?
The motors, windings, magnets ate too dissimilar for comparison.
agreed but it gives rise to a more indepth question , i would have thought a dc motor direct drive would be the least resistance , least electronic / highest output
Can you make a whole video on the application of a stepper motor as a generator? And what do you think are the advantages and disadvantages of it on a proper generator?
I can put it on my to do list
That would be wonderful. Thanks!
What did you say at 4:36?
6 Puls Brückenschaltung
GreatScott! Any english name of it please?
6 pulse bridge rectifier?
Thanks :)
Hast du auch ein Deutschen Kanal?
I understand the complication if spinning al 3 motors at the same RPM so you can get apples-apples comparisons, but once you discovered that the DC motor was a gear motor, you should have scrapped the results and started over again because your results were wildly off due to the gear multiplication of the brushed motor.
4:12 you pronounced it wrong, it is FFFUUUULL BRIDGE RECTIFAYAAAA!!!!
Can you do video about lamp types and their components like balasts starters and other stuff. Maybe compare lamps? Like Sodium vs Mercury or something similar?
Ich Habs mir schon bei deinem Akzent gedacht...
German engeneer 🤗
Exactly the type of video I was looking for! Thanks
SECHS PULS BRÜCKENSCHALTUNG
*RECHT - E - FIRE INTENSIFIES* 🔥
Thanks buddy. Very helpful as usual
Gimme da scope plz
I liked how you said "but of course that would fit the BLDC motor shaft."
Thank you for the demonstration. I need to charge large lithium ion battery packs. A bldc generator with gearbox is what I had in mind.
Low KV brushless motors ranges around $100... the cheap brushless motors with gearboxes require 20-30lbs of brute force to turn the 100kv brushless motors......
It would have been quite interesting to see what happens if the BDLC Motor(Generator) was connected with the other motor more permanently, so that it would be possible to run it on higher speeds
Power measurement should have been done by using an optical tachometer and putting the motors on a reaction torque-arm with a scale to measure the torque.
Otherwise, really appreciate the video and the work you put in here !
Great video sir! Informative and direct! Love it!
Great video as always.
I would love to see you make a cheap DIY Arduino based handheld console.
For me: Stepper motor + Gearbox
Believe me, you will amaze by durability and energy produced by rotation!
🔥🔥🔥
4:36: BLDC motor with 3-phase output uses 6 diodes to convert to DC, just like a car alternator! Nice!
Loving the outro enthusiasm!
I'd say it also depends on the application, there's people here in TH-cam that do wind turbines with LEDs, in that case the size, weight and less torque makes small DC motors ideal for the job.
i just use 24 pedal assist and gears with chain then i connect motor to motor so i watched your video for motor efficiency but it doesn't matter as long as it make more then the original 24 volts i am happy. i win. i got 32 volts with two not so good ones.
try an induction generator experiment, get an induction motor, get it running, apply more torque to the shaft that essentially forces the motor to have a positive slip, this makes the motor output real power and take in reactive power, large wind turbines use this
So on bldc perhaps the efficency is somewhat proportional to the rpm. I use regenerative braking and the controller handles the rectification and dc conversion. On average my output current is between 50-75% of the input for a similar speed.
Die Sechspuls-Brückenschaltung dazwischen ist voll unerwartet gewesen😂
I think the best stays the BLDC, because it produces a three phase output, which can be more easily transported and used by asynchronous motors, but of course I'm placed in industrial and mass electric production context
Finally, a video that I've waiting for so long!!
so if not mistaken. more RPM is favored over high torque? you only want enough torque to overcome the magnetic attraction as the magnets pass the coils. perhaps slightly more to maybe steady the voltage supply?
I wish you would of come out with this video before I finished the gravity light video. You explain things a bit better than me.
A simple permanent magnet synchronous machine (which is pretty much exactly the same thing as a BLDC motor) is best for simple and small generator applications. It has the least losses and the best frequency stability.