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Unread 19-05-2014, 16:23
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Re: motor Ke and Kt Quiz

Kt tells you the torque per amp, how hard the motor can push vs. the current it will draw, which assumes the motor is under load, but ke gives you 1/kv, which measures rad/sec per volt, or how fast the motor will spin based on the voltage it is supplied with. There will be more losses when a motor is at high current, high torque than when it is at it's free speed, but isn't this an ideal motor, so kt = 1/kv?

kt is measured in Nm/A which works out to a kg*m^2/(A*s^2).

ke is measured in V/(rad/s), which again, works out to be the same thing.