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Unread 19-05-2014, 16:06
Rauhul Varma Rauhul Varma is offline
Drivetrain and Design Lead
FRC #0192 (GRT)
 
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Re: motor Ke and Kt Quiz

Quote:
Originally Posted by Ether View Post
Ke = 12/400 = 0.03
Kt = 0.4/20 = 0.02
Why are Ke and Kt not equal?

Pin = V*I = Ke * w * I
Pout = T*w + heat = Kt * I * w + I^2 * R

Pin=Pout
Ke * w * I = Kt * I * w + I^2 * R

Therefore Ke must be larger than Kt, as some energy is lost to heat.

Last edited by Rauhul Varma : 19-05-2014 at 16:11. Reason: edited for clarity