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Does power factor vary with speed?If yes, how?If not, why?
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Answer Posted / srinivasa rao talasila
PF will not vary with speed.
For speed control of induction motors we will follow these
techniques 1) By varying the frequency
2) By varying the input voltage
3) By adding the rotor resistance
4) By consequent pole changing technique
So, power factor is cosine of the angle between the voltage
and current.it will be lag in inductive loads and Lead in
capacitive loads.
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