What is a BRUSHLESS MOTOR and how it works - Torque - Hall effect - 3D animation
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- เผยแพร่เมื่อ 4 มิ.ย. 2019
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In this video we will talk about a DC motor which is the ideal choice for many applications where it’s needed: reliabilit, low maintenance, less noise, speed control and low cost
In the specific, we are going to see how does a brushless DC motor works.
We can assume already by its name, that this type of electric motor has no brushes.
As we have already seen in our previous video about the working priciple of DC motors, the brushes are sliding devices which allow the electricity to flow into the copper coil of the engine.
The brushless motor have no sliding elements on the collector, so, this completely solves the problem of maintenance and replacement of brushes and other electrical contacts.
Unlike the common DC motors, that use brushes for their functioning, brushless motors do not produce sparking or friction noises within them.
This is a very interesting feature of brushless motors, becouse allows them to be suitable for use in environments where sparks are dangerous. For example in environments where ignitable gases are present.
This type of motor has a rotor with permanent magnets, it could not be otherwise, since there are no contacts on the rotor, as we already said.
Its stator has electromagnets excited by windings in coils.
This is an important difference compared to the traditional brushes DC motor, since the latter can have both stator and rotor composed of electromagnets, to increase the magnetic fields and therefore have an higher mechanical power density by unit of weight of the motor.
The torque of the brushless motor is due to the magnetic interaction imposed by the electromagnets on the permanent magnets.
There is a precise sequence of excitation of the electromagnets which imposes to the permanent magnets an angular movement, which is always in the same direction, and it is as constant as possible under the same excitation.
When electricity flows into coil 1, the opposite poles of the rotor and stator are attracted to each other.
When the rotor is getting closed to the coil 1, the electricity flows in the coil 2. When the rotor is getting closed to the coil 2, the electricity flows in the coil 3. Later in the coil 1 the electricity will flow again, but with opposite polarity. This process is repeated continuously inside the engine ensuring a constant rotation of the rotor.
Obviously the sequence is cyclical and the rotor continues its rotation until it is powered, repeating the sequence, from time to time.
To be more specific: the sequence of excitation of the electromagnets inside the stator is such that the magnets of the rotor are attracted to the electromagnets without never reaching them, as the excitation is always and only of those coils "not yet reached".
An example to better understand this principle is represented by the dog race in which a hare is placed in front of the greyhounds at such a distance to be seen but never reached.
In this metaphor, the dogs represent the rotor that follows the magnetic flux generated in exact sequence in the coils of the stator.
In the case of more coils, always multiples of 2, it makes sense to use a sequence that uses them all, to increase the magnetic flux to which the permanent magnets are subjected, and turning off only the opposite electromagnets.
This simple foresight increases the torque, that is the power that the motor can supply, without substantially modifying its design criteria.
The greater the number of coils, the smoother is the rotation of the rotor, which will thus have a constant torque.
But how does our brushless motor know the precise moment in which to excite the correct sequence of electromagnets which allow continuity of the rotary motion?
For this purpose, an electronic controller is typically used. This controller has a sensor to detect the exact position of the rotor magnets and thus decide which coil energize by following the right excitation sequence.
The modern brushless motor sensors uses the Hall effect.
In this animation we can observe the configuration of a standard sensor.
This is a simple 2-pole device that can drive 2 or 4 or 8 or more electromagnets in the just seen sequence.
This, is instead the representation of a classic circuit layout with protection diodes. The presence of diodes is necessary to protect the sensor from negative self inductance, in case we need to suddently block the power supply from one of the coils.
There are basically 2 families of brushless motors. Those with external stator and those with internal stator.
We can summarize the main strength points of the brushless DC motor... - วิทยาศาสตร์และเทคโนโลยี
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Its worth noting since the introduction of Neodymium magnets on brushless (Digital motors) they have become massively more efficient!
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JAES Company machine or human?
@@stevesloan6775 Synth
@@JAEScompany Damn . . . . AI much?
@@victoreous626 lol
i literally watched this video 10 times and could not convince my mind to pay attention because the monotone voice kept convincing me to take a knap. we are human. enjoy what you do. and we will enjoy too.
Dear Jonny thank you for your comment the voice is made from a human, do you think is like robotic?please let us know how we can improve, you have italian surname wheere are you from ?
Hey Jonny, how about being appreciative instead of negative for the -free- education on motors they offer. Sorry if you can't stay awake and pay attention??
@@JAEScompany I think it was fine. Though the voice changes due to corrections probably were a bit distracting
true dat. robot voice is pure soporific. if they could can the essence of it, they could sell it to people who have problems sleeping
th-cam.com/video/3nouCs4sSSch/w-d-xo.htmlttps://th-cam.com/video/3nouCs4sSSc/w-d-xo.html
Enjoyed learning about brushless motors but i must admit I will have to watch it numerous times to have a good hold on what's going on. Thanks for the lesson~!
Hello Rickarama and thank you for your comment! You'll probably find this video about the working principle of induction motors very interesting th-cam.com/video/EcbHEOIVGcg/w-d-xo.html Please let us know what do you think about it. If you want to learn more about our projects, please visit our website www.jaescompany.com/
Rickarama Trama the dog race anology was great
Wow i now know it , thanks , very high speed switching is how i understand it. 😊
You're not alone there
The two inactive coils in your animation could also be energized in reverse polarity to "repel" the magnets as they have already passed, thus giving the motor even greater torque.
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the question of efficiency must also be considered in real world application, then theres heat
thank you for showing the video, it emphasizes the technical details, functions and the advantages of a brushless DC motor. it gets my interest in it since I intend to design an electric driven Bike.
Daddy, what is a brushless motor? Son, its a motor without brushes.
Joke of the year😂😂😂😂
@@rajithamahanthu3470 Daddy, what are blueberries?
They're berries that are blue.
It is what it is
I like this kind of information. Not too much, no stupid dominating music, a calm yet firm narrator.
Thanks.
I do HVAC and a lot of equipment is switching over to DC motors / inverters and freq drives. This is very informative. Thank you.
Thanks for this video. I love my Ryobi brushless cordless saw. Blows away the old brushed saw motors.
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That was very in depth and easy to learn. I'm pretty good with electronics and tech and I've wondered for years why some motors have 3 posts and how to power them. now I know.
Hello! thank you for your comment! We're glad you like this video. If you're interested in electric motors you might find our video about induction motor very interesting th-cam.com/video/EcbHEOIVGcg/w-d-xo.html please let us know what do you think. If you want to learn more about our projects, please visit our website www.jaescompany.com/
I'm hugely grateful for your friendly form to explain and speak in English. I'm keeping try to understand more about that formidable mechanism.
Thank you so much Juba for your kind words! We are really happy to share some knowlege about these incredible devices since we are personally involved in industrial supply everyday. We would like to know your opinion about this video we made, in which we explain the working principle of transformers th-cam.com/video/fbu1Xji27vc/w-d-xo.html What do you think?
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My doubts got cleared. Very informative video. Thanks
Thanks, guys, I am working with a motor control system right now and this helped a lot.
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I really enjoy this video, I am learning automation/instrumentation (U of H) and goes way beyond the basics presented in the training program in this specific topic. Good job JAE
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University of Houston?
Great job on the discriptions of the details of terms and motions of comply
This helped a lot! I entered my first R/C car with a Brushed motor race a couple weeks ago. I watched the pro guys racing their cars with Brushless motors and wondered why the noise the cars made was super low!! I thought it was because of the cars were going so fast that the sound decimated. But the explanation of a brushed vs. a brushless motor sound made a lot of sense! Thank you!
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So which is faster??? Brushless rc cars? Or brushes?
Thank you for your video I have learned a lot I actually played it for my children so they could understand the motor so we all learned a lot thank you again
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This is why Making Brushless motor is very Hard.
Thanks for the detailing of the brushless motor.
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Making a brushless motor is easier than making a brushed one,AC or DC no difference.
Slammin info my bros. Enjoyed the full and careful use of nomenclature throughout the video. Bravo!
Was thinking about this the other day, thanks for clarifying
It would be the ideal choice in ALL applications that it was "needed"...
Haha
Self-looped
The water is wet
Finally , simple logical explanation!
Good job 👍
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Yes very helpful in understanding how the brushless motor works
I use an E-bike and am going to motorize one myself. You were a big part of my learning curve. Thank you, Joe
Ciao Prelas thank you for your message good luck please let me know if other our video can be interesting for you
Ya, an effective tutorial in short time.
SCIENCE! Thanks for posting this great tutorial Your dog race metaphor worked really well for me.
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@@JAEScompany Hie... How can i get this brushless motor... I'm in Zimbabwe, my whatsapp number 263777920262...but a far much larger one... How do i get some magnets or how magnets are made.. Please help me especially on a big brushless DC motor..
Thank you! I've worked with DC motors but never had a problem with them (except changing one thermistor on the control) so I never really understood what was going on in there!
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Thank you for your clear explanation.
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Seeing how you can Energize two coils instead of one blew my mind but it makes sense and it's very cool!
Exact perfect clear explanation. Fully understood the entire video.
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Great video. I have a cordless drill that is brushless. This explained why it seems to have more torque. I'm sold on this design.
Thank you Mike for your comment! Let's not forget that brushless motors are better adapted, generate no friction, produce less heating and provide better performance. Plus the maintenance is significantly reduced, which comes down to dusting and there is no need to replace worn brushes. Did you have a chance to watch our video about INDUCTION MOTORS? th-cam.com/video/EcbHEOIVGcg/w-d-xo.html We would like to know your opinion about it. If you want to learn more about our projects, please visit our website www.jaescompany.com/
Thank you for a very informative clip, which in itself was very well made.
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Nice. They are amazing, powerful, durable and make my batteries last a long time on my RC vehicles.50+ MPH no problem!
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That's because the magnets and not the bldc. If you put NdFeB magnets in a brush motor they would blow the doors off a bldc efficiency.
Thank you for this video. I really appreciate how much detail you put into this. Please make many more insightful videos as I will be learning a lot from you🙏🏻thank you and have an amazing New Years🎄🎁❤️
thank you Calero where are you from ?
@@JAEScompany 🇺🇸, what about yourself ?
I like the analogy of the dog race with the motor's rotation. It's helpful.
Great video, didn't get to technical in a technical. Good place to start learning more about brushless motors and motor controllers.
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This video was very well done! The best I have seen on this subject so far. Everything is explained in great detail at just the right pace. Thank You. Great job
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Thank you. Great explanation.
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Amazing information about Brushless Motors thank you!
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Bardzo ładnie zrobiona animacja . Film dużo nauczy .
great explanation of brushless motors!!!
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Thanks for sharing your knowledge very informative, it inspired me to focus more making electrical video
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Thank you for posting this video clip on TH-cam.
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Thanks for making such a good video on brushless motor
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This is interesting. Thank you for the knowledge. Subscribed!
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What a legend. thanks for simplifying your explanation
Thank you so much for an informative video
So in layman’s terms, it’s a fancy electromagnetic “carrot on a stick”. Got it. 👍🏼
Thanks mate , this saved me 10 mins & 2 ads
@@queenslander954 henetime! 😁
U r athw GOAt
Best comment ever
I wish I knew this analogy earlier tbh
Best CG voice I've heard so far.
Still annoying though.
Wait... it was a cg voice?
same thing your girlfriend says about you when you moan
It has some weird fluctuation of amplitude.
@@charliedsurf1267 Human voice pushed through a vocoder or something for that special 'techy' sound?
But the bit I didn't quite follow was how did they get a mechanical rabbit into the motor.
(And why did the greyhounds care anyway?)
wait fr? if this is a CG i *need* to know where and how to get it.
Very great video explaining how a brushless DC motor works....
Thank you, very understandable
Ohw lovely good knowledge about latest technology thanks a lot dear sir
Greatly informative, thank you. Are there any specifications for RPMs and horsepower? Or do you use a different rating system?
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Great video! My understanding of brushless motors has become clearer.
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Thank you for sharing valuable information
I started buying the XR versions of my dewalt 20V tools, and noticed they dont overheat like the brushed motor versions. For homeowners the brushed is fine, but if you need it for work in a factory or trade get the brushless.
Dear Alex thanks for your comment If you are interested give a look to our website :www.jaescompany.com and please let us know what do you think about our video induction motor th-cam.com/video/EcbHEOIVGcg/w-d-xo.html
I would still recommend brushless for home owners since they tend to be treacherous on tools. For one, if they get wet, it's not an automatic death sentence for the tool. Second, they are less susceptible to over torquing And, when the tool gets dusty, a quick squeezes on the trigger seems to clear out the debris without affecting the tool itself. The only problem I found is sudden stops can wrench your arm and hurt like crazy.
Yea my personal XR Dewalt tools have been completely reliable in commercial construction applications since 2014. The DC motors are the best.
@@fwingebritson I would recommend brushless for homeowners as well, but if you put a dewalt or Milwaukee brushless drill in front of someone just looking to wall mount their TV or repair furniture once a month they might be intimidated by the increased price. Homeowners are also less likely to be forced to work outside or in dirty areas.
@@AlexFlockhart That would depend on the home owner. Now if we are talking apartment/condo dwellers, you have a solid point, but the average home owner sees themselves as "weekend warriors" and doing things around the house is part of their work out.
I have a brushless motor on my front load washer, I couldn't believe how small it was, especially compared to a standard brushed motor!
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www.fisherpaykeltechnologies.com/products/direct-drive-motors/
great video! thanks, it definitely gives better understanding of the brushless motors
thanks you. Can you please give a feedback even for th-cam.com/video/Tt_g39njvdw/w-d-xo.html
just what I was looking for! thanks
can I use 12 volt 2500 watt DC brushless motor as a generator then what could me the voltage and watt i get
Thank you for the animation.But @5.30,it must be higher MTBF-Mean Time Between Failures.Higher value of MTBF indicates reliability.
Excellent video! Well done. Thank you!
Really clear
*_...pre-electronic-age drivers maybe used sealed reeds, rollamite reeds, mercury-magnetite reeds..._*
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I need a motor strong enough to convert my 88 Bronco to electric.
Excellent, Added To My Research Library.
Nice content but I still fart in my own mouth without the proper magnet configurations and multiple anthology terms. Any chance on feedback? My friend put me up to this.
Sir we need your co operation to make law cost BLDC motor
sir entire world is buying bldc motor from world terrorist country China.. they killed many innocent
lets start isolate them from global business
It is tesla motor
Nikola Tesla motor
Serbijan inventor geniys
Out of the blue I wanted to know what the difference was between brushless and brushed motors and this video genuinely helped me understand how a brushless motor works thank you very much
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Excellent! Thank you for this video uploader. 🤗
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What software did you use to make that illustration?
Not the same one used for translating to Engrish is my best guess.
Good explanation, I've been curious about the distinction. Excellent graphics.
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when, rotor is close to coil 1, the electricity flow is coil 2, when rotor is close to coil 2, the electricity flow is coil 3..................
Just perfect explanation 👌
Thanks, very informative
It’s funny, I just finished a 3 hour electrical science final and this is what I choose to watch.
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Was always interested on how the motors worked for a drone, now I kinda know
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Nice presentation! Understandable and relatable. Thank you!
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Thanks for the video and can you please explain about how to control its speed.. really need to know either by reducing voltage or changing it poles.
I learned more from this that all of my 15 years of school combined.
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I learned a lot from your video! I had no idea what the term "brushless motor meant"!
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Very useful, thank you!
I think this is an excellent explanation. Some viewers have noted minor translation issues, but I think everything is easy to understand.
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A "low MTBF" actually means that the device is LESS reliable.
That Thumbnail is definitely made to look like real engineering's thumbnails
that's why I clicked on it
Very informative video, thank you!
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broo thanks, you helped me pass my electromagnetism exam❤😊
do yall have any that work under water
As long as all the wiring and boards are insulated from the water, there shouldn't be any reason why not. You will want to make sure the motor bearings are well sealed as well.
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Even though I learned a lot from this video, I decided to scroll down for sarcastic comments....
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Wonderful explanation
Thanks a lot.
It was very informative.
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Milwaukee M18 Fuel.
Not so sure on the lower cost statement. Usually BL tools are pricier.
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Enjoyed the video. Thank you.
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Very informative, thank you.
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No engine in a motor and it's HALL effect not HAL effect (as in a hallway)
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I figured it was simply because it was a synthesized voice.
Yeah, a little slip. I caught it but understood everything anyhow. Just needed some proofreading.
Super ji
How is this DC motor when you need to use AC pulses to move it? Just because we use transistors mosfet and create square wave to power coils we use alternating currents so it should be AC nod DC motor.
I believe it's due to the DC control. Even though any brushless motor is going to be AC powered.
You could use the term AC induction both for synchronous and asynchronous types. Both BLDC and AC induction is correct. In forklifts it's advertised as an AC motor, though some have the cheap option of using DC hydraulic motors 🤮
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Right. The science in this video is completely not accurate. Modern day brushless motors are not DC motors at all. They are actually very closely related to a typical three-phase AC motor. We use a speed controller it takes DC voltage it converts it to a three phase voltage at a frequency desired for the RPM wanted. It's actually very closely related to a synchronous AC motor. What was described in this video would require at least six Leeds coming out of the motor to do what he explained. Might want to go back to school
I'm pretty sure the use of DC is in terms of application. If someone has a DC supply and needs a motor they will buy a motor listed as DC. They don't care that the motor is running on AC they only care that their DC supply voltage will work.
I believe it is a DC motor because the pulses are controlled DC. If you throw raw ac at it, it wont work at all. The output from the controller may look AC, but its not. The pulses only go from positive to negative because its chasing the magnets that have a north and south. if there were only two magnets it would be + - + - + -. But if there are six magnets, its + + + - - -
Thank you 🙏 ✔️
Very helpful 💯 👍
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never too old to learn something new every day!
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5:27 You said, “It is reliable & has a very low MTBF parameter”. Shouldn’t that be a; *_HIGH_* MTBF parameter? MTBF - Mean Time Between Failure. Or the average time from one failure to the next, or a measure of reliability. In general, MTBF is the "up-time" between two failure states of a repairable system during operation. Therefore a _Lower_ MTBF is less desirable than a *_Higher_* MTBF...
Yup. I noticed that too. I'd guess he mixed up low-failure-rate; sort of the opposite of high MTBF.
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Low time between failure is not a good selling point.
I'm just glad I had my teeth converted to brushless teeth. Thank God, no more brushing required.
Amazing
Well I learned something today.