Permanent Split Capacitor Induction Motor
Table of Contents
PSC Induction Motors, Permanent Split Capacitor Motor
Permanent Split Capacitor Motor
One kind of Single-phase Induction motor is a permanent split Capacitor (PSC) motor. The figure below displays a permanent Split-phase motor’s circuit diagram. A Squirrel cage rotor makes up the permanent Split-phase Induction motor, and the stator has two Windings: a starting or Auxiliary winding and a main or running winding. One Capacitor, Designated “C,” is attached in series with the motor’s starting winding in this motor. Both when the motor is starting and running, this capacitor is Permanently connected to the circuit.
It is known as a Permanent-split Capacitor Induction motor because the Capacitor is Permanently plugged into the circuit and splits the Single-phase power supply into two phases to enable the motors to start on its own. The permanent split Capacitor motors are also referred to as a Single-value Capacitor motor because there is only one Capacitor used in the motor’s operation.
This type of motor lacks a centrifugal switch because the starting winding and capacitor C are always connected to the circuit. As a result, the permanent split capacitor motors functions in a manner similar to that of a balanced 2-phase motors. As a result, it generates a consistent torque and is consequently less noisy while operating.
Advantages of Permanent Split Capacitor Induction Motors
A Permanent Split Capacitor Induction Motors possesses the following advantages −
- It has high pull-out torque.
- It does not require centrifugal switch.
- As the capacitor is connected permanently in the motor circuit, it has higher power factor.
- It has higher efficiency.
Limitations of Permanent Split Capacitor Induction Motor
The limitations of a permanent split capacitor motors are given as follows −
- Continuous use of an electrolytic capacitor is not possible; instead, an oil-filled paper capacitor is used, which is larger and more expensive.
- The permanent-split capacitor motors has a low starting torque which is usually less than the full-load torque.
Applications of Permanent Split Capacitor Induction Motor
Some of the applications of Permanent Split Capacitor Induction Motors are given below −
- Used in fans, blowers, heaters, and air-conditioners.
- Used to drive refrigerator compressors.
- Also used to drive office machineries, etc.