Basic Electrical Circuits-Capacitor Start Capacitor Run Motor
Capacitor Start-Capacitor Run Basic Winding Schematic & Motor Sample
|The capacitor start-capacitor run motor has a starting
capacitor in the start circuit, and a run capacitor that is continuously
connected in the run winding circuit. This motor is in wide use in industrial,
commercial, agricultural applications due to its high starting torque
and high overload torque.
The starting torque is produced by a starting winding design that
includes a capacitor for boosting torque. The running torque is boosted
by the run capacitor. The starting switch will disconnect the
start winding and capacitor, once the motor reaches about 75%
There are some drawbacks to the motor design. The switch, and capacitor add cost to the motor, and can be a reliability problem. Capacitor start-capacitor run motors are found on woodworking machinery, high pressure water pumps, air compressors, vacuum pumps and other high torque applications.
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