Principle of operation of single phase capacitor start induction motor

Principle of operation of single phase capacitor start induction motor
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This cutting action is done through a centrifugal switch.

Single phase induction motors require just one power phase for their operation.

They are commonly used in low power rating applications, in domestic as well as industrial use.

This will produce a force according to Lawrence law, so the rotor will start to rotate. But if we can somehow give this rotor an initial rotation, one torque will be greater than other.

But here we have got 2 such oppositely rotating magnetic fields, so the torques produced by them will be equal and opposite. There will be a net torque in the same direction of initial rotation.

This article is aimed at giving you a conceptual overview of the working of single phase motors.

The main components of a single phase motor are the rotor and stator winding.

One of them will cancel the RMF of the main winding and the other will get added up.

The result will be a single magnetic field, which revolves under specific speed.

As a result the loop will keep on rotating in the same direction.

This is the way a single phase induction motor works.

By looking at the figure below, you can easily understand the theory.