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The Volt electric motor is rated 150 peak hp, torque 273 lb-ft corresponding to 2885rpm. max wheel rpm 1527?
So that requires a speed reducer with ratio 1.88:1, not a 9:1 gearbox from 15000 to 1666 rpm. One needs a torque-hp vs rpm characteristic to understand fully.
Torque is maximum with motor stalled (0 rpm) and ZERO at maximum rpm The peak output hp occurs somewhere around mid-range.of motor rpm. hp is the product of torque x rotational speed.
Also the motor is probably dc, not ac, No idea (am interested in) what speed control system is used.
The type of speed control depends on the application
it could be mechanical variable ratio transmission to variable speed motor
AC variable frequency drives are somewhat economical but very limited
DC drives are more versatile.
describe the application
Things to consider are noise, speed stability...
Guru
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