Does a motor (dc /Induction/Synchronous ) consumes more power when operating at higher load than when operating at some lower load? Or power consumption remains constant/same in both cases?
What I think is that, Power drawn by motor should increase as we increase the load on motor.
But, someone told me that Power drawn remains constant.For example a 10 kW motor will always consume 10 kW irrespective of load on it.He said power consumed is P=3 VIpf (pf=power factor) for a 3 phase induction motor.As load increases current I increases but Power consumption remains constant as V ,pf change to compensate the increase in I in order to make power remain constant.
Please explain this.