DIFFERENCE BETWEEN SYNCHRONOUS AND INDUCTION MOTOR

Topic	INDUCTION MOTOR	SYNCHRONOUS MOTOR
Design	simple	complex
Self starting	yes	no
speed	Runs at lower speed than synchronous motor	Always constant speed
Excitation	Not needed	Separate dc excitation
Load vs speed	Load increases, speed decreases	Speed stays constant with increase in load
Hunting effect	present	absent
maintenance	No special maintenance	Requires special maintenance
pricing	cheaper	costlier
Speed control	possible	Not possible
usage for         pfi	no	yes, as a synchronous condenser