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Old 01-16-2013, 03:59 AM   #23 (permalink)
serialk11r
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Quote:
Originally Posted by mechman600 View Post
A series wound motor cannot effectively do regen unless they have variable brush timing, because the brushes are generally timed properly for one direction and don't work well in the opposite direction, which is what regen is effectively doing.

Sepex motors are great at regen braking, but large enough ones (especially for a direct drive EV) are not available. 72V seems to be the limit, both in available motors and sepex controllers.
Snap, I forgot about that. The Agni has an adjustable brush, but it's not adjustable on the fly.

However I think the brushless RC plane motors are good for regen right? I see regen as a feature on the Kelly controllers...maybe it needs Hall effect sensors to work, I haven't studied electric motor design much.
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