Rewinding of Bafang Ultra G510/M620 stator?

[Tomblarom]

I toasted the stator of my ultra and wanted to use this opportunity to learn more about motor winding.

I assume, that I slowly killed it during my 10.000km of usage. Powering 3500W and running too hot over a longer period of time, multiple times. Often experienced slow downs thorough the controller due to over-heating.

Anybody done this on a Bafang inrunner motor like this? Is there a company or individual that does this and can assist me?

My plan is to replace all bearings, use heat resistant grease, sandblast and anodize the shell for better cooling.

 

[1boris]

https://www.greenbikekit.com/bafang-8fun-spare-parts/ultra-g510-mid-motor-parts/bafang-ultra-motor-stator-windings.html

 

[markz]

You probably damaged the magnets by the heat.

 

[Tomblarom]

That's what my burnt one looks like :lol: :lol:



Sent it to a german professional. Maybe he's able to rewind it and enhance the capabilities. Meanwhile I used the opportunity to sand-blasted the shell: