Permanent Split Capacitor Motor Speed Control

The controls provide infinitely variable speed adjustment which allows the end user to select the desired level of air volume.

Permanent split capacitor motor speed control.

19 also known as a capacitor run motor this type of motor uses a non polarized capacitor with a high voltage rating to generate an electrical phase shift between the run and start windings. A microcontroller is the brain of the system. Speed control of permanent split capacitor motors january 22 2015 the speed of a permanently split capacitor motor can be adjusted by connecting it to a variable voltage source such as an auto transformer. This capacitor is permanently connected in series with the start winding.

4 permanent split capacitor psc motor. Permanent split capacitor psc motors are the most popular type of single phase induction motors. The permanent split capacitor motor will sometimes use an extra capacitor to aid in starting. Units help operate universal shaded pole and psc 1 phase ac motors used to run fans blowers pumps vibratory feeders and heating and lighting applications.

The capacitor c is permanently connected in the circuit both at the starting and the. The full wave phase control circuitry minimizes power loss thereby reducing energy requirements. Permanent split capacitor psc motor the permanent split capacitor motor also has a cage rotor and the two windings named as main and auxiliary windings similar to that of a capacitor start and capacitor start capacitor run motor. Permanent split capacitor motor another variation is the permanent split capacitor or psc motor.

This article will discuss different techniques and drive topologies to control the speed of a psc motor in one and two directions. It has only one capacitor connected in series with the starting winding. Adjustable ac speed controls from grainger can operate on 60 50 hz at plus or minus 10 rated line voltage. A photograph of a permanent split capacitor motor is shown in figure 11 25.

Because this capacitor remains connected in the circuit an ac electrolytic capacitor cannot be used to replace the run capacitor for this type of motor. This will cause the start winding an auxiliary winding once the motor reached the running speed. The permanent split motor also called capacitor motor uses the same value of capacitance for both starting and running operations.