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Old 11-20-2015, 08:04 PM
bistander bistander is online now
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Join Date: Apr 2015
Posts: 1,598
Motor questions

Quote:
Originally Posted by nilrehob View Post
Have you noticed that the torque to power ratio differ between different motors?
Sure, it varies with the speed of the motor.

Quote:
Originally Posted by nilrehob View Post
That the ratio gets higher as the motor gets bigger?
It is actually the other way round. The higher torque motors need to be larger as they require more flux and/or current density at the air gap.

Often times the higher speed motor with a gear reducer makes more sense for a high torque application. Ever notice the EV motors? Small for output power and high RPM while being very efficient.

Quote:
Originally Posted by nilrehob View Post
Do you agree that its beneficial to have a motor with high torque to power ratio?
No.

Quote:
Originally Posted by nilrehob View Post
Do you agree that its beneficial to have a generator with low torque to power ratio?
No.

bi
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