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What are the ways to start a single-phase motor?
Apr 14, 2018

Motor AC single-phase motor starting mode is divided into several types:

The first type, split-phase start-up type, is assisted by the auxiliary starting winding, and its starting torque is not large. The rate of operation remains approximately constant. Mainly used in electric fans, air conditioning fan motors, washing machines and other motors.

Second, when the motor is stationary, the centrifugal switch is turned on. After the power is turned on, the starting capacitor participates in the starting work. When the rotor speed reaches 70% to 80% of the rated value, the centrifugal switch will automatically trip and the starting capacitor will complete the task. Was disconnected. The start winding does not participate in the running work, and the motor continues to operate with the running winding coil.

The third type is that the centrifugal switch is on when the motor is stationary. After the power is supplied, the starting capacitor participates in the starting work. When the rotor speed reaches 70% to 80% of the rated value, the centrifugal switch will automatically trip and the starting capacitor will complete the task. Was disconnected. The operating capacitor is connected to the starting winding in series to participate in the operation. This connection method is generally used in air compressors, cutting machines, woodworking machines and other places where the load is large and unstable.


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