Synchronous Motor vs Induction Motor – Difference Between Induction Motor and Synchronous Motor

Synchronous Motor vs Induction Motor – Difference Between Induction Motor and Synchronous Motor


AC Electrical motor generally divided into
two main categories. 1. Synchronous motor and 2. Asynchronous motor. An asynchronous motor is popularly called
as Induction motor. An induction motor is an AC electric motor
in which the electric current in the rotor needed to produce torque is obtained by electromagnetic
induction from the magnetic field of the stator winding. An induction motor can therefore be made without
electrical connections to the rotor. A synchronous electric motor is an AC motor
in which, at steady state, the rotation of the shaft is synchronized with the frequency
of the source current; the rotation period is exactly equal to an integral number of
AC cycles. In this video I will discussed the major differences
between a synchronous motor and induction motor. Induction motor�s construction is simpler,
Particularly in case of cage rotor. Synchronous motor�s construction is complicated. An induction motor is a single excited machine. A synchronous motor is a doubly excited machine. Induction Motor�s stator winding is energized
from an AC source. Synchronous Motor�s armature winding is
energized from an AC source and its field winding from a DC source. If the load increased the speed of the induction
motor decreases. It is always less than the synchronous speed. Synchronous Motor always runs at synchronous
speed. The speed is independent of load. Induction motor has self-starting torque. Synchronous Motor is not self-starting. It has to be run up to synchronous speed by
any means before it can be synchronized to AC supply. An induction motor operates only at a lagging
power factor. At high loads the power factor becomes very
poor. A synchronous motor can be operated with lagging
and leading power by changing its excitation. An induction motor is used for driving mechanical
loads only. A synchronous motor can be used for power
factor correction in addition to supplying torque to drive mechanical loads. Induction Motor�s efficiency is lesser than
that of the synchronous motor of the same output and the voltage rating. Synchronous Motor is more efficient than an
induction motor of the same output and voltage rating. An induction motor is cheaper than the synchronous
motor of the same output and voltage rating. A synchronous motor is costlier than an induction
motor of the same output and voltage rating. Dear viewers, Thanks for watching the video. If you have any question write in the comment
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