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Domestic power is A.C. in nature and so two types of motor can be used 1-Synchronous Motor and 2-Induction motor.
Since Synchronos Motor can not be used because it runs at constant speed so Induction motor is used.
in domestic fans only capacitor run motor single phase used now. previously it was split phase single phase induction motor
synchronous not used in fans as speed control not easy for it
its not capacitor start capacitor run its only capacitor run motor.
we cant afford centrifugal switch in fan so c start c run not possible at all
and certainly we even dont need it..