What type of motor is typically used with a centrifugal switch?

What type of motor is typically used with a centrifugal switch?

• A. A three phase motor
• B. Shaded pole motor
• C. PSC motor
• D. Capacitor-start motor

Answer: (D)

A centrifugal switch is specifically designed to be used with motors that require an adjustable start-up phase, particularly in the context of providing an initial boost in torque. In the case of a capacitor-start motor, the centrifugal switch plays a critical role by connecting and disconnecting the capacitor from the circuit. During the starting process, the capacitor is engaged to create a phase shift that improves torque, enabling the motor to start effectively. Once the motor reaches a certain speed, the centrifugal switch opens, disconnecting the capacitor, which allows the motor to operate efficiently on its running circuit without the need for the extra capacitance that’s only necessary during start-up. This functionality is crucial for ensuring that the motor can start under load and accelerate to its operational speed without being held back by the capacitor circuit once it is no longer needed, which is a key characteristic of capacitive starting mechanisms. Therefore, the choice of a capacitor-start motor aligns perfectly with the operational purpose of a centrifugal switch.

A centrifugal switch is specifically designed to be used with motors that require an adjustable start-up phase, particularly in the context of providing an initial boost in torque. In the case of a capacitor-start motor, the centrifugal switch plays a critical role by connecting and disconnecting the capacitor from the circuit.

During the starting process, the capacitor is engaged to create a phase shift that improves torque, enabling the motor to start effectively. Once the motor reaches a certain speed, the centrifugal switch opens, disconnecting the capacitor, which allows the motor to operate efficiently on its running circuit without the need for the extra capacitance that’s only necessary during start-up.

This functionality is crucial for ensuring that the motor can start under load and accelerate to its operational speed without being held back by the capacitor circuit once it is no longer needed, which is a key characteristic of capacitive starting mechanisms. Therefore, the choice of a capacitor-start motor aligns perfectly with the operational purpose of a centrifugal switch.