The start capacitor in the CSR motor is larger than the run capacitor

The start capacitor in the CSR motor is larger than the run capacitor

• A. True
• B. False
• C. Not stated
• D. Only during startup

Answer: (A)

In a capacitor start and run motor, starting torque comes from the auxiliary winding being driven through a capacitor that creates a larger phase shift. That start capacitor is intentionally larger than the run capacitor so the motor gets a strong starting torque. Once the motor reaches speed, a centrifugal switch disconnects the start capacitor, leaving the smaller run capacitor in the circuit to improve running efficiency and torque. Because of this design, the start capacitor is indeed larger than the run capacitor.

In a capacitor start and run motor, starting torque comes from the auxiliary winding being driven through a capacitor that creates a larger phase shift. That start capacitor is intentionally larger than the run capacitor so the motor gets a strong starting torque. Once the motor reaches speed, a centrifugal switch disconnects the start capacitor, leaving the smaller run capacitor in the circuit to improve running efficiency and torque. Because of this design, the start capacitor is indeed larger than the run capacitor.