Basic Electrical and Electronics Engineering: Unit II: Electrical Machines

Starting of Single Phase Induction Motor

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A single phase induction motor is not self starting. To overcome this an auxiliary winding is provided in the stator in additions to the main winding

STARTING OF SINGLE PHASE INDUCTION MOTOR

A single phase induction motor is not self starting. To overcome this an auxiliary winding is provided in the stator in additions to the main winding, so the motor starts as a two phase motor is shown in fig 3.71.


When the motor speed is reached 75% of synchronous speed the auxiliary winding is disconnected from the circuit. This is done by the centrifugal switch which is connected in the auxiliary winding, and is used for starting purpose only, so it is called starting winding. Under running condition a single phase induction motor can develop torque with only the main winding so it is called running winding.

Basic Electrical and Electronics Engineering: Unit II: Electrical Machines : Tag: : - Starting of Single Phase Induction Motor

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