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Reducing the poles of a 3-phase induction motor, it _________(a) will decrease maximum power factor(b) will increase maximum power factor(c) will make no change in power factor(d) can not be depictedI have been asked this question in a job interview.I'm obligated to ask this question of Applications of Polyphase Induction Motors in chapter Induction Machines of Electrical Machines

Answer»

The correct option is (a) will DECREASE maximum POWER factor

Easiest explanation: If number of POLES reduces, speed increases, SLIP decreases, reactance increases, power factor ANGLE increases and so the power factor decreases.



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