Bafang Hub Motor rewinding

[@chrisl9067]

I've looked at the uneven winding jobs on many Bafang motors from the factory and wonder how they get away with charging so much. I've thought about rewinding mine, but never saw such a great rewinding job. Thanks for the encouragement. This should be a training video at the Bafang factory 😄👍

[@MasterOfHalo25]

God bless your soul for posting this, very helpful in fixing my hall sensor issue

[@ro-jayno-yay3185]

All around great video! Even without removing the sprocket hub! Amazed. Thanks! You’ve got to do more of these. Seriously. You know your motors! Thanks again.

[@axelthorfilms]

i just burnt up a 500 watt motor. My windings are black. That motor looks looks ok as far as the windings go. Great instructional video. Thank you. Maybe I will try this over the winter. I bought a new one to keep me rolling.

[@khanhknapp]

Just curious with your windings burnt up does your ebike still work or is it dead?Just curious if burnt windings are still able to conduct electricity thru it or is that a wrap in the motor?

[@en2oh]

it;s a pleasure to watch this being done correctly! Thanks!

[@GavinFreedomLover]

Great job, this is truly skilled work, I have built an experimental wind generator with a 3kw Ebike motor it has so much wire in the motor,great video thanks.

[@user-BCNYOU]

Please help if you can, Do you know the nominal watt output of these two Bafang motors by the model numbers on the casing, Iike i think they are both 750 watt but just looking for confirmation from someone that knows what the model numbers mean my two motors are FM G061.750.D 5.5 and RM G063.750.D 5.5

[@abdellatifnaitdbou8095]

Excellent travail

[@magnuss751]

Can you please describe the material you are using and some hints where it can be bought?

[@venkateshagopalgopal4532]

A feast to watch! Thank you.

[@JulesMarz]

Thank you for the video, you're an artist!

[@khanhknapp]

I'm in the process of rewinding my hubmotor now and love your video and have just 2 questions for you if I may ? 1st when taking off the old wire I have a few of the wires that are broken will it still work if I twist them back together again and continue the process will it be ok ? 2nd question is what are the black things you use when sliding the wires back into the slots ? I'm having issues with the wires getting caught up by the sharp edges sometimes and curious what their called and how do they work? Confused about after the wire is back in the slot and wrapped around one of the poles how you get the black paper or black film or what ever it is off? Btw awesome video yours is the only one I found that actually shows step by step the entire process ! Excellent job buddy!👌

[@marmasteris]

1.Yes, it will be OK, but it is better to solder them. 2. Black thing is thin plastic. It can be cut from a plastic bottle, the thickness is similar.

[@khanhknapp]

@@marmasteris Thank you for reply your video is so helpful it's the best one on KZbin when it comes to rewinding a brushless hubmotor and the diagram you put in your video is excellent it tells someone like me doing it for the first time exactly where to start and the direction of each winding I have your diagram next to me to watch as I'm doing it thank you so much.Still confused about the black plastic tho,after you slide the wires in the slot how do you get the black pieces of plastic out?

[@khanhknapp]

@@marmasteris I tried to rewind my motor and it didn't work I used the configuration you used with your diagram and didn't know there were different configurations to use and I wished you would've said that in your video.Our motors are the same 48v 750 w but mine didn't work and then I read some forums and I guess there's many different configurations that can be used which I didn't know I thought all motors were winded the same way with the same number of wires and same number of turns and same thickness of wire which I was wrong about.

[@marmasteris]

@@khanhknapp This is a classic winding scheme if the number of poles is the same. If the motor does not work, there was a mistake in rewinding or the controller is faulty.

[@khanhknapp]

@@marmasteris I must of mis counted or accidently missed counted on a turn or something .Gonna un wind it and try again ty for your help I really appreciate it.

[@godofcodgamer8296]

I wish I have those skills 😁😏🤭 good job bro!

[@SuperDud3ed]

What's the logic behind rewinding a motor? Is it for more torque? Cleaner battery life and flow? Did you measure the voltage output before you did this to know it needed to be done or was something just not working?

[@TheJuacho8]

Looks at the right arrow, he explains it

[@jakecardy1121]

You made it look easy I have two motors I need to do this to

[@toddthomas3226]

Great video. Wish i had found out yesterday before i tried taking mine apart and wrecking it. My bangfor motor seemed to have a short. Mine didn't have the plastic shield behind the circuit board or the white tape around the windings. $500 nz for new motor. Rip off

[@mkarkin21]

Hello. Thank you for this instructional video. Which hall sensor model are you using? Thank you.

[@marmasteris]

Hall sensor SS41

[@uttammajumder1540]

Good job .Many many thanks for all .

[@jacan3]

Great Job, thanks for sharing.

[@szolanek]

Creyzee good presentation. Thanks!

[@zico3239]

thanks for sharing what was the reason you rewinded it ?

[@TheJuacho8]

He explained that the motor was originally used for a 20" (inches), and he will use it for 12 inches wheels.

[@fluidmind3629]

can iuse this scheme on normal 36v 250w front hub(geared) motor ? thanks for the tut ❤

[@marmasteris]

Yes you can.

[@joc1862]

Please explain why you've gone from 9 turns of 10x0.5 wire strands to 7 turns of 10x0.5 wire strands??? Couldn't you just use less throttle if you wanted less power??

[@marmasteris]

Reducing the number of turns increases the speed.

[@joc1862]

@@marmasteris ok, thanks...

[@Jeff.Hardy.]

Actually answer is simple. if you reduce the wire length, the resistance is decrase at the same time. it means more electric current flow. and again it means high magnetic field. I would advise increase the battery power instead of reducing the wire lenght. if you increase the magnetic field on the wire then you have to increase the neodmiyum magnets's magenetic field. these both balance between wire and magnets have to increase or decrease at the same ratio. Otherwise you will lose effiency.

[@wrosslandwr8032]

Can the insulation take the hammering without breaking?

[@marmasteris]

Yes, the insulation does not break. The hammer is wooden.

[@inspectomania]

nice job !

[@pascaldidier9113]

Bonjour J'ai trouvé dans votre vidéo le schema de bobinage pour moteur Ebike 18 poles tres interressant aussi je voudrai savoir la longueur de fil utilisé pour bobiner un moteur (a peu pres ) moi c'est un moteur de 250 Watt 36 volts Dia fil 0.6 mm. Je voudrai savoir aussi le sens de rotation. Merci d'avance pour les infos DIDIER P

[@marmasteris]

I don't remember the length of the wire. You can easily calculate the length yourself. The direction of rotation is easily changed by swapping any two phases of the controller.

[@gauravjoshi9183]

Amazing video

[@wellington1315]

Congratulations for video, very good 😊👍

[@raymercado3650]

Great Job mate👍What was the material you installed on top of each winding gap? Fibreglass board? Thanks

[@marmasteris]

Yes,fiberglass 1mm.

[@raymercado3650]

Ok, what thickness and where can I get this fibreglass board? What is the material used in between the core and wire winding? Paper? Thanks

[@marmasteris]

@@raymercado3650 Thickness 1mm.Type on aliexpress Fiberglass Sheet Light-green Epoxy Plate

[@marmasteris]

It's not paper, it's original insulation. You can use PET high temperature tape instead.

[@raymercado3650]

Ok Thanks. Why was the Hall sensors broken? How do I avoid doing damage to board when dismantling the windings?

[@תמיראהרוןלוי]

God bless you ❤

[@Chinhnguyen0497]

I wonder why they don't use thicker wire, Is thin wire easier to winding? because as far as I know with the same impedance value the thicker wire will have to wind less turns than multiple thin wires

[@marmasteris]

Yes,thin wire easer to wind.Turns count must be the same.

[@ro-jayno-yay3185]

Yeah, it looks good on paper, but reality is different. I also have to point out your Hall Sensors we’re done when you heated them up, to pull them out. They’re very sensitive to heat. Just like most things. Haha. Also I’m surprised you didn’t take off the sprocket hub. It’s only two nuts. They come off easy, yet YOU DID IT while installed! I’m impressed! You know your motors. Now you need a 1500w. Lol. Thanks again!

[@johnlancaster6591]

Superb!

[@vanceman99]

Hey great video! What is the material you are using to tie down the wires…is that Teflon plumbing tape? I was thinking of using fishing line, but it may not handle the heat in the motor.

[@marmasteris]

Yes,teflon tape

[@vanceman99]

@@marmasteris Awesome, thanks. This video is super helpful.

[@luelee817]

How do I contact you. I need you to service mine?

[@vicferrarisgarage]

Awesome video

[@nicod974]

So, did you rewind it in star or delta configuration?

[@marmasteris]

9:58 star

[@nicod974]

It was a stupid question since I re-watch your video multiple times, I didn't pay attention

[@m-fee4359]

super great job buddy

[@gauravjoshi9183]

I'm winding my motor.. Using your video.. Incase if I miss a turn or two what are the consequences?

[@marmasteris]

There will be no big consequences.

[@adrianatanasov1162]

What are those black rectangles you used at 11:18 to guide the wires into the motor?

[@marmasteris]

It is a thin plastic.

[@AMIRAli-gf7mf]

Thanks you so much nice video

[@RomansKarpenko]

Добрый день. Имею очень похожий мотор (Bafang 36V 350W) - в косе 5 жил по 0,5мм диаметром. Пока не разматывал - сколько витков на зубе неясно. Он на заднем колесе 28''. Подскажите какое кол-во витков у вас получилось намотать косами по 10*0,5мм? По диаграмме вроде 7, но лучше спросить... Также, если правильно понимаю, увеличивая количество жил в косе или диаметр жил при сохранении количества витков, уменьшают скорость но увеличивают момент - правильно? А уменьшая количество витков соответственно увеличивают скорость вращения?

[@marmasteris]

Здравствуйте,намотал 7 витков,было 9,тем увеличил скорость вращения.Количество жил в косе на скорость не влияет,но влияет на мощность мотора.Количество витков на зуб влияет на скорость вращения.Больше витков,меньше скорость и на оборот.

[@preciouscruz173]

Boss san ako pwedeng mag pa rewind sa inyo

[@MarioTaMotorsich9DE]

Без коментів 👍👌🔥👋

[@murraymadness4674]

Why not just increase the voltage instead of doing all this work?

[@marmasteris]

Thanks for the observation. The voltage of the motor is 36V and has already been increased to 48V.

[@gauravjoshi9183]

What made you hit those winding with wooden block? Any advantage?

[@marmasteris]

You need to compress the wires, there is little space.

[@edgefx1]

@@marmasteris but what does compressing it do? by little space do you mean it will rub up against the spinning shell? if there was plenty of space you dont need to hit it down right?

[@marmasteris]

@@edgefx1 Yes,about plenty space,you don't need to do that.

[@mohamedata2705]

Many thanks

[@buddha2845]

Very nice video,,what is the price of test table which counted Ampere,voltage and wattage,,does it shows RPM?

[@marmasteris]

About 110$,RPM not shows.

[@buddha2845]

@@marmasteris thanks

[@buddha2845]

What would happen if you use 1mm thick wire with 5 wires for each slot? how it will effect the performance?

[@marmasteris]

@@buddha2845 I used 10x0,5mm,cross section S=πr²=3.14x0.25²=0.196mm²x10=1.96mm² If wire 1mm,S=3.14x0.5²=0.785mm²x3=2.35mm² So I need 1mm 3 wires for each slot and the performance is the same.Only 1mm is hard to wind and will hardly fit.

[@buddha2845]

@@marmasteris will it effect RPM or torque? And will it enhance the life of armature?

[@gorillageeks5645]

Does 7 turns over 9 increase top end speed but also reduce torque?

[@marmasteris]

Slightly.

[@rathinavelramamoorthy3684]

@@marmasteris Any change occurred in voltage, got reduced to 48V from?

[@marmasteris]

@@rathinavelramamoorthy3684 The motor was for 36V, but I connected it to a 48V battery.

[@rathinavelramamoorthy3684]

@@marmasteris this could have affected your - starting torque / slow pick up. Hw much speed increased to?

[@rathinavelramamoorthy3684]

@@marmasteris Connecting to high voltage battery could reduce the top speed, your rewinding is successful?

[@saleemakhtar3861]

this motor consists of how many watts ?

[@marmasteris]

350W

[@Streetmachin3]

is magic

[@tadkon9437]

👌 👌

[@ivansalazar6684]

HELP!!! I lost the magnet shown in the minute 1:42 :(

[@hiandhello4183]

its not a magnet. if you can, you can make one using a dremel and a hardened steel bit but safety first and only if you know what you're doing

[@ivansalazar6684]

@@hiandhello4183thanks…but that part has a magnet, right?

[@abdullahallohedan7980]

ممتاز❤

[@oleggkon5182]

Ну, Вы...блин - Кудесник)))) Не объяснили, только, суть улучшайзинга!!! Или, это был ремонт?!

[@marmasteris]

Ответ в коротком описании видео.Чтоб было яснее,добавлю-этот мотор был расчитан для 20"колеса,я буду использовать в 12"колесе.Если ничего неделать,то уменьшится линейная скорость колеса.Чтобы такого непроизошло,надо повышать обороты мотора,а на это только два способа-поднять питающее напряжение или перемотать мотор с меньшим количеством витков.Я выбрал полседний вариант.

[@oleggkon5182]

Здорово, Вы, продвинулись в этом вопросе))) Я пока только в мыслях приближаюсь к этому! Хотел бы сделать садовую тачку на мощном мотор-колесе, но приценился и обломался, пока)))) Скоро...Все...начеут изучать мат часть электротяги...илоны масски наступают!!!

[@marmasteris]

@@oleggkon5182 Если мысли есть,значит сделаете :)Да,придет конец нефтепродуктам:)

[@oleggkon5182]

100/500%))))

[@josecortezmoran7876]

🤭🤭🤭🤭🤭🤩🤩🤩🤩🤩👍👍👍👍👍 nice

[@user-od67]

продолжение!

[@marmasteris]

Постараемся.

[@GuleaiVasea]

speed low

[@ssnoc]

Music is annoying as hell

[@marmasteris]

The video is also annoying. I tried to match it.

[@תמיראהרוןלוי]

Bro i have a question... any hob motor have the same method of wiring?

[@marmasteris]

There are various ways of wiring.