The Pros and Cons of Rewinding an Outrunner

[Metallover]

I want to learn some stuff about rewinding motors, particularly outrunners.

I'm not sure if it is possible, but if you could rewind a motor to turn at a slower rpm but make the same power that would be awesome. Rewinding an outrunner to say 50-75kv would be awesome. It would be easy to gear down. You wouldn't need a massive reduction.

I know the cheap outrunners don't have great windings, so rewinding them would make it a better motor even if you didn't change the wind. More copper equals more power.

The bad part is that you might mess up and ruin the motor.

Please fill me in on rewinding outrunners and if you could reduce the KV and get similar power. I'm guessing you can't because if it were that easy everyone else would be doing it..

 

[Miles]

I'm not sure if it is possible, but if you could rewind a motor to turn at a slower rpm but make the same power that would be awesome....... I'm guessing you can't because if it were that easy everyone else would be doing it..

It would be awesome but, as you guess, you can't.

You get more torque per amp as you reduce Kv, which can help the battery and controller out but, as the armature resistance also increases, it doesn't help the motor........

Maximum power, for a given motor, is pretty much proportional to nominal rpm.

Peak power out is at half the no load speed.