Time to use some brain cells folks
I'm designing an algorithm for the induction motor.
Ok, everyone knows that above nameplate speed the V/Hz ratio and the torque start to fall, but exactly by how much I cant find.
I thought about using the HP formula HP = (torque(nm)*Speed(RPM))/5252 but assuming the V/Hz ratio goes down, so does the slip induced current on the rotor, so I would have to increase the slip to have a constant secondary output. Problem is such functions are often not linear.
I cant really find any good source that discusses this on the field weakening region. Any ideas?
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