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How to rewind a BLDC Motor (as a Generator)
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- čas přidán 3. 11. 2018
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In this video I will show you how you can disassemble a BLDC Motor and in which manner you have to rewind its copper wires (motor phases) in order to lower the kV rating of the Motor. This way the motor features a lower maximum RPM and thus can be easier utilized as a generator. Along the way you will also learn a bit about the delta and star wiring of such a motor and their advantages.
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Music:
2011 Lookalike by Bartlebeats
Ecstatic Wave, Jens Kiilstofte
machinimasound.com/music
I know virtually nothing about electronics but you describe things in a way that's easy(ish) to understand. A lot of things you say goes over my head though but still it is enjoyable to watch. You speak English extremely well. You did make me smile when you called your vise a "wise". Thanks for the videos.
Sechspulsbrückenschaltung
Dreiphasenbrückengleichrichter AMK
@Max German compound words... gotta love 'em
Sixphasebridgecircuit. (aka Threephasebridgerectifiercircuit )
That is actually 3 phase rectifier to get DC voltage for the LED in this case
I was about to comment the same :D German compound words are amazing!
The electronics, mathematics and mechanics ratio in is video is the best. Thank you for the great content Scott, appreciate your videos.
9:15 "SECHSPULSBRÜCKENSCHALTUNG"
My brain: _"Windows XP shutdown sound"_
brains.exe encountered an error and needs to close. (0xE=MCwft) - file comprehension.dll is corrupt or missing.
@@RinksRides lol
Hi,
Just spotted a slight mistake that might be relevant in future videos. 26 wires with a diameter of 0.2mm do not equate to a 5.2mm diameter wire. You need to multiply the cross section area, not the diameter. In this case, it would be the equivalent of a 1.02mm diameter wire.
@Robert Slackware Hey, why not platinum, or Rhubidium?... >
@Robert Slackware Here is an opportunity to triple down on stupid... Go for it... By the way, what your ignorance is talking about is NOT silver, it is in fact, MOSTLY copper, probably coated in silver to get the lower resistance of silver used via skin effects, but the hardness of copper as silver is TOO ductile a material to be used for much of anything.
@Robert Slackware Ah, you did triple down, excellent. That "silver" wire, I guarantee you is less than 50% silver if sold for electrical purposes. Silver is too soft and if used for windings, as you are talking about MUST have an insulating coating on it anyways. Pure silver would not help you any compared to partial. Probably less than 30% silver. And yes, it is Hella expensive.
@@w8stral Now you got me wondering why airplanes use Silver wiring. Off to google I go. I'm sure theres a Quora about this somewhere.
@@ChristopherJones16 Why silver plated wiring? Same reason people gold plate wiring, corrosion mostly. Also in Aerospace you silver plate your wiring and other surfaces as it effectively stops dendrite growth which causes short circuits AND gives skin effect dampening from EMP for space based sattelites though gold is used usually.
2 years until i go to college and just because of your videos i want to be an electrical enginner
did you go there ?
9:15, don't you mean an EVEN FUUUULLER BRIDGE RECTIFIER?
did you mean , MOTHER OF ALL BRIDGE RECTIFIER
No, I said: "SECHSPULSBRÜCKENSCHALTUNG!"
Six Pulse Bridge Switching
MOAFBR XD
You should use acetone for removing stator. Works well for me.
Love the way your native language has ways of putting complete ideas, even processes into one word. @9:50 I see there's a word that you say on the Patreon page means the 6 pulse bridge rectifier, but similarly Schadenfreude, or even better, Backpfeifengesicht and Verschlimmbessern
Interesting project, I used to make tiny motors for RC planes by rewinding the motors from old computer CD drives.
Apart from the tedium of actually winding them, the different results that were obtained by the number of turns on the windings, diameter of wire etc was quite interesting.
Antisocial Engineering how the fuck did you comment 1 day ago if this was uploaded 3 minutes ago?????!!!!!
He/she uses time machine, jk, it's because of patreon
So that's the German for what Electroboom calls an Even Fuller Bridge Rectifier
I love the German language. Agglutination is fascinating.
After hearing 👂 this guy in all his videos my mind is blown. He sounds like a professer that knows what hes doing. Keep up the good work man
I literally just came to CZcams to search how to rewind a motor... Great timing, lol
You're welcome ;-)
It happens to me everytime with specific CZcamsrs (including GreatScott) It's crazy
Rhodexa Art they *know* what you’re thinking!
(And they don’t approve of it, so stoppit!)
Great Video as always! Man I love the moment when u suddenly change to german when u say ,, Brückenschaltung" just sounds funny 😂😂
I would like to see a esc driving a car alternator hooked up to a bike or something. Great job man, you're the best!
I rewound quite a few motors for my quadcopters. When removing stator you need to heat it, cooling motor base is fine, but sometimes there is adhesive which will give up with higher temperatures. Also threading is common, so you always need to twist it and not just pull. Avoid stator damage by wrapping it in some cloth, leather or just paper. You want to avoid any sharp edges on stator and layer separation. For anyone trying it, consider double lacquered wire, since its more resistant to damage when hand winding. If you need winding scheme for different slots and pole counts calculator on www.bavaria-direct.co.za/scheme/calculator/ can be really helpful. Also use some heat shrink on wires exiting motor. With vibrations motor base can "bite" through enamel and short your phase to metal base. That starts to be problem when you attach your motor to grounded metal frame or something. Simple trick for removing enamel from wire is to use pill of aspirin and melt it with wire. It smells, but its fast and I prefer it over sandpaper.
reseth great tips there! 👍
so liquid aspirin removes enamel? Makes you wonder what it does to our stomachs when the stomach acid melts the pill.
@@ChristopherJones16 a crucial step is heating it, so hopefully you don't have any fires burning in you belly!
Hi,
as you are always asking for ideas, Igot one that would be awesome. As a hobby I do some FPV Drone flying and for that purpose people are typically using simple sony hs1177 cameras that provide a simple analog PAL (or NTSC) signal. This signal now is transmitted analog on the 5.8GHz band (at 25mW). The downside here is, that with the analog signal a lot of noise is received too. For that purpose a very nice project would be to find a way of converting the analog signal to digital with error-correction and maybe decode it back on the receiver. The main problem here is that the latency has to be as low as possible. For that purpose I'd also suggest to not use of-the-shelf Video ADCs but rather encode the signal line-wise or bundle a few lines at a time. Else collecting a full frame will always introduce quite a bit of latency by itself.
And even if you think the above is a little too complicated to accomplish I am sure there would be very nice projects using the cheap fpv-equipment parts available.
Hey I am electrical engineering student and You are my inspiration. Always love your videos
Excellent job! Very informative and comprehensive video on converting a BLDC motor to a generator where the sample is an RC KV Motor. Thanks for this video as this saved me time and money from doing the exact same experiment to come up with the answers that I need where you have already able to provide. Keep it with these kind of informative videos.
You can get automobile or truck alternator rectifiers which are 3PH and Schottky very low drop,and current ratings from 40 to 250+ amps. Brushless motors can come in very large sizes, replace the bearings with Hybrid Ceramic to prevent current loss through the armature and eroding the bearings.
This is the best generator video ever seen
this is why we like your videos, you listen to us and follow up.
Great work! Thanks for this video - I have a brushless direct drive washing machine motor I wanted to use as a generator on a wind turbine, but it needs re-wiring. Your guide and links make me more confident I can make it work.
Hopefully a motor rewinding tutorial. I'm thinking of to install a fork-mount motorcycle auxiliary projector headlights set in my bicycle and modify a bldc motor into a generator, and I also think of to make a solar-charging high performance eletric supercar that uses an electroproducing couple designed in a Tesla powertrain configuration for its powertrain. That's why I was waiting for a video like this. Btw, awesome work and tutorial as always Scott
I can't 'unhear' your inhaling after each line :D Good video as always! :)
Dammmmnnnnn... Me too!!!!!
We love your videos, but please don't hurt yourself when you ask us to stay creative and that you will see us next time :)
Scott, you are really great, stay like that.
Thank you :-)
A variable load would take these generator videos to the next level. Its critical that the impedances in these systems are matched so that you transfer the maximum possiple power. You could possibly even try to design or use a MPPT system.
9:45 - You connected the wires to the "what?"
That just froze my poor Scottish brain for a few seconds. Then you did it again!
I need a drink...
Rule for watching Great Scott video.
Rule 1: Like the video first
Rule 2 : enjoy the video
Rule 3 : after watching the video, think of what you're doing with your life.
This proves Mr.Pascal (Greatscott) is actually reading our comments, so please don't hesitate to give him reasonable suggestions for new videos.
get this man a few new pens
He should really use rotring isograph.
Please. Where is GS from?.
Germany
Excellent video. I might share this with my students. It looks like you have created (3D printed) your own shaft coupler as well. Thanks again for your detailed demonstration.
Thank you for inspiring me. I will change my future nearer to your current path, may it be AC or DC. The next discussion should be about cheapest and effective alternative materials for all parts? Casting techniques will be the last step? The dialogue will be much more interesting. Kudos from Malaysia.
Awesome German boy love you a lot wish you good luck with CZcams and electronic projects
Thanks
@@jkobain Six-pole bridge rectifier. (It's ElectroBOOM's "Even Fuller Bridge Rectifier".)
@@FlyByPC The Mother Of The Fullest Possible Rectifier!!!
Thank @GreatScott for this informative content. I learn alot by you.
Thank once again
10:21 in Y configuration the the end point voltage will be indeed sqrt(3)*fase_voltage, the current will be devided by sqrt(3). So the power will stay the same and not be lower like you mention in your video.
I would surely leave the project while I was doing all the coils. I esteem you
Hi friend, a tip from Argentina. Consider use schottky diodes for the rectiffier ;) you win a couple of volts...
I was thinking about this a lot after previous video. So glad you took on the project and made it happen! Really great video! Would love to see if you can reasonably use it in some way to generate power. Like could it be used as a windmill, or something like that?
i would put all his videos together grab some popcorn and enjoying his writing !😅😎 👏
Nice! There's plenty of explanations of Faraday's law and so on for motor and generators on the Internet, but practical number of turns/output voltage for real BLDCs is more sparse.
This video has given me much more practical information for my pedal generator for a hybrid bike project. I don't want any gears or chains, the whole point is simpler mechanics. Even after rewinding a BLDC I know I will probably still need some step up gearing though.
I wish they still had radio shacks..
Love love love your vids. As a hobbyist they are perfect jumping off points as I attempt to improve my understanding of electronics.
Still better than CZcams's rewind
10:16 configuring either wye to delta doesnt change the output power. As the current decrease the voltage increases by the same factor. Wye to delta only changes current or voltage that is needed for some application.
E.F.B.R even fuller bridge rectifier
You should be my electrical teacher when i was at school sir..
:)
also if you're having trouble with the adhesive just put the entire coil setup in some rubbing alcohol. it'll eat away at the glue/adhesive but not damage the coating on the wires.
Finnaly a video that explains how you can change a bldc's specs :) thanks, maybe I will use it on my electric skateboard to make a direct drive with a low kv
Your videos never get old. Cheers Scott!
Thanks :-)
Now days #greatscott extending his previous video topics and this is awesome👌
Glad you like it :-)
It's amazing how much you know about electronics, mechanics, physics ! I'm jealous ;)
Can you bring back your versus series. Maybe do one for power supplies. A generic chineese one and quality one (Meanwell etc). Do tests on them (overload, max temperature and so on) and a conclusion if its worth the money.
Also keep up the german humour in your videos. It always cracks me up.
I can put it on my to do list
I am thinking of using an old manual grinding mechanism as a gear box.It increases RPM tenfold and is lubricated, has low friction losses.Thanks for the excellent video.
good video, I posted a similar method but with a PMDC into a universal motor 2 months ago, glad you did some calculations, hopefully I'll have a patent before part 2 video,apparently its easy approval for a provisional patent with a animated prototype internationally today.
when switching fron delta to star config the output power remains constant
i was looking for this cooment hahaha because the power should remain constant
Oh good I'm glad I'm not the only one who thought that. Star has higher voltage while delta has higher current. The product of volt and current in both configuration is the same.
BTW, the back emf of BLDC is kind of trapezoidal wave. To get the better output wave like sin wave, you need to use a PMSM motor.
wonderful handwriting!
Very informative! Thanks for doing this experiment and posting. It gives me the data I need for a demonstration project I was having difficulty researching.
You could have also used a buck converter to get the desired >1 volt output, and would have been the easiest of all three options.
You know what would be awesome? A blasting machine style hand crank firework igniter!
Great!! This video and the previuos one are very good and usefull!! :) probabily can help me in future project. Just for curiosity: use BLDC (or stepper) motor as generator to provide DC will also decrease the efficency, because the output current (the currente that charge the capacitor) is only peaks and the bridge diode will no conduct for the overall period of the sinusoidal output voltage.
Great video, it would be cool if you would make a detailed video about converting a car alternator into a motor. Basicly the oposite of this video
I have a generator head from a old portable gas generator and my question is to you is can you wire up the generator head as a go cart motor? Instead of the gas engine turning the generator head and the generator head producing AC current, is it possible to introduce a DC current to the generator head so I can use it for a go kart motor?
Soon after the German word in 9:16, the BLDC went into hip hop dance with that 3d printed adapter 😂
If you ever need a high voltage generator I can recommend a microwave oven motor that spins the plate for your food. I turned it and got zapped. I was like WTF. Than I measured the voltage and got 90V AC from hand crancing and over 780V AC with a drill set to the lowest RPM. My multimeter only goes up to 800...
How much amp current bro
Kindly reply to me ASAP
wait...sechspuls brückenschaltung??wow,i cant even say that word
Welcome to Germany everything in electronics sounds Like that😂😂
You got the "ü" after all...
Ya ya ya
"Stop calling me George. My name's Sylvester"
"But I can't say Sylvester, George"
"Okay, okay, so I'm George"
You said you count the number of turns "per pole". These are not poles but slots. The number of poles, for such a motor, is determined by the number of N/S magnets on the rotor. The number of poles is always an even number (N and S). On the winded part, the name is slots, even if there are protuding parts. And the number of slots can be an odd number. A 8 poles, 9 slots motor for instance has a very smooth torque curve...
Thank you for answer the questions 🙏
If this was used as a regular bldc motor would it have a higher torque? This would very cool and efficient way to not use a gearbox
Oh damn @ 4:16
Another friend who walks the Sinistral path? #ONEOFUS!
10:12 power stays the same for either configuration. Cause P=U*I and both of these are either phase or line. Please don't mix up those 2 cause in phase 1 is devided by sqrt(3) but in line the other is devided by sqrt(3)
I think you could have split the original winding into parts, as they are all made from individually enameled wire. Like 2 parts of 13 litz wires and connect them in series. Of course after dividing the wires of one side into two bundles on the second side you have to test each of the 26 litz wires from the strand individually, to which part-winding it belongs. But this seems doable.
What about trying to make a DIY 3 phase generator. Would love to see the result and what you could power. Looking forward to the video if you do it. Keep up the good work👍
This is a 3 phase generator...
Wie er einfach like a boss 6 puls Brückenschaltung sagt 😂 , gutes, informatives , lustiges viedo! Weiter so
When I saw this video, I had a question:
if I want to make a wind generator, should I connect a modified engine (like the one on the video, but bigger) to the generator shaft?
Or should I create a winding around the circumference of the generator and use the motor shaft as the source of rotation for neodymium magnets?
I was also thinking about connecting several generators to the circumference of the generator ... it would gain power, but it would be difficult for the wind to move the whole blade system.
Learning bldc.... how much i wanted to see your winding step by step and joining wire... becos i am beginners
Thanks for the video!!! Love anything related to producing energy! Keep up the great work!!!!!!!!!!!!!!
9:15 GreatScott!: “Sechspuls-Brückenschaltung”
Me, as a misunderstanding American: “Gesundheit”
Nice Video like ALWAYS. Can you make a video about how to built a TDR sensor to messure volumetric water content of soils? These sensors are awesome and much much better than the EC based sensors but they are really expensive.
would be great to see a video from you trying to put a the magnets of these little motors with halback configuration.
the sechs puls brückenschaltung is amazing
For me I was able to convert crap motors into generators by just replacing the permanent magnets with neodymium magnets since they are just crazy better.
Some rubber or silicone mats would have protected those parts and given better grip for sure. Which reminds me I should make some for my new vice.
Hi GreatScott! Can you make a video where to explain the benefits of the brushless motor as a generator? I want to know the voltage and its power. Can this be used as a battery charger for example?( Off course with all the equipment needed)
Many thanks. Really well explained and reasoned.
Or instead of rewinding the motor, you could use your motor controller. FOC allows negative torque (current) which also enables full bus voltage generation (works similar to a buck converter, using the motor coils as inductor). This would need external power (or at least a buffer, to store startup power) tho
I wonder if you could get magnets that are higher strength and make it even better.
Hi.... I would like to know more about designing motors and AC generators??...In particular, the relationship between wire size, flux calculation, terminal voltage, current per phase/ per coil and power output....Any recommended books or materials/websites....?...
Where did you learn all about the electronics and how they work?
Sehr schön 👍
I love this, thanks Scott
You're likely shorting the laminations together by putting them in a vice and using pliers on them with nothing to protect them (like some wood or plastic between the stator and the vice or pliers. This can cause cogging, etc.
what is the difference between using 1X 0.5mm and 26 X 0.2mm ?
Greatscott im working on an experiment that is currently on hold, but i would like to see if you can continue whete i left off. I would like to turn a stand fan into a generator by rewiring. Or a washing machine motor. I know if anyone cando it you can. Keep me updated.
You didn't have to rewind, just put the 26 winfingx in series in stead of parallel... Or 13 pairs in series... Another good one is to separate the 3 phases rectify them via voltage doubler on to capacitor pairs and put the 3 in series...
i hope you make video for lcd 128*64 ST7920 plz 😍
A 3 phase brushless motor has the following values. The maximum current drawn from the battery is 4.62 amps.. The thrust is 4025 grams with a three-bladed fan 18 * 8.. The speed at the maximum lifting force is 2780 rpm. The battery voltage is 23.46 volts. How much is the output power? How much is the efficiency?
Great Scott! - - - - I'll never be doing this!
Opinions on using a BLDC motor as a dynamo on a bike?
I have a fast classic bike and want to give it a small lightweight dynamo with little drag and I wanna use a BLDC motor for that.
Greaattt... upgrade/modify using knowledge... 👍
Amazing video, one of your best, thank yoi Scott 👌
Couldn't you replace the Sechspulsbrückenschaltung with an ESC, that has a hall sensor, knows where the rotor is and then activates the specific coils to let the current ggo backwards into the battery?
Or in other words, how do electric cars recouperate? With a 6PBS or a special ESC?