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what is the difference between induction and synchronous
motor?explain in simple words?why 3 phase motor is given
preference over single phase motor.
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Answer Posted / mohammed subhi assaf
Synchronous motor : doubly excited (DC to the rotor , AC to the stator), not self starting , high PF (used as capacitor bank) , unity or leading PF , high efficiency (low inrush current) , Shorter operational life compared to the induction motor (brushes).
Induction motor : singly excited (AC to the stator), self starting , low PF , lagging PF , low efficiency (high inrush current) , longer operational life compared to the Synchronous motor (no brushes).
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