20 March 2018

Capacitor Start and Run Induction Motor

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.
capacitor start and capacitor run motor

Function of the capacitor

  • Improve power factor
  • Improved efficiency
  • Quieter operation
  • Improved overload capacity

Torque - Speed Characteristic

  • As the rating of the capacitor is very small, the starting torque is only 50% to 100% of the full load torque.
torque speed characteristic of the capacitor start and capacitor run motor


Application

  • 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.

1 comment:

  1. After all is said and done, not every wax melt brand is the same: Some have higher quality products, some are more expensive than others best wax melt brands. Some may use essential oils and others prefer fragrance oils instead.

    ReplyDelete