Ignoramus32687 wrote:

I had a visitor yesterday who responded to my craigslist ad about a
free 200V 7.5 HP 3 phase motor. A pleasant, intelligent young man. I
asked him what he was doing with the motor, and he replied that he was
going to build an electric motorcycle. His plan is, apparently, to
have a motorcycle based on batteries, inverter, phase converter, and a
3 phase motor drive. I just could not believe what I heard. (and still
have doubts about his veracity) Am I going crazy or does this sound
like a completely insane idea to you?

i

Induction motors are bigger and heavier than the equivalent brushless
motor with permanent magnets, and an inverter is much less efficient
than rewinding the motor to whatever the battery voltage is.

Other than that...

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com