Electric bike maintenance...

**davereid** · 14th January 2007, 17:00

Series wound DC motors are almost ideal for transport applications. They produce the most torque when they are stalled, they will spin to untold rpm - no gearbox needed, and they turn into generators when over-run, so regenerative braking is easy. I assume the EC idea would work for them.

**Jantar** · 14th January 2007, 17:48

No, series wound and EC are mutually exclusive. To be series wound the field current is taken directly from the stator via brushes.

I would agree that a series wound DC motor would be best for motorcycle use and would eliminate the need for a gearbox. There is always a BUT: Controlling that DC current would require some pretty meaty electronics, so would be expensive compared to EC.