capacitor start and run motor Single Phase Induction Motor unbalanced two phase motor

Capacitor Start and Run Induction Motor

19:04 ·

Capacitor Start and Run Motor

It consists of starting winding and running winding.
The starting winding is connected is in series with capacitor and there is no centrifugal switch it means that the capacitor is permanently connected in the circuit.
As the capacitor is permanently connected it is also called as Permanent split capacitor run motor.
As the capacitor is used during starting and running condition neither optimum starting nor running performance is achieved.
The rating of the capacitor is in the range of 2 to 20 µF and it is oil or paper foil type continuous duty type capacitor.
If the rating of the capacitor is selected in the low range, very low starting torque is achieved.
It is practically behaves like unbalance two phase motor.

Function of the capacitor

Improve power factor
Improved efficiency
Quieter operation
Improved overload capacity

torque speed characteristic of the capacitor start and capacitor run motor

Application

As the starting torque is very low it is used in the

Fans
Blowers
Voltage regulator circuit
Oil burners

Forward – Reverse rotation

If the starting and running winding is identical, the forward and reverse rotation of the motor is possible by connecting external forward – reverse switch.

Comments

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