Two reasons for adding capacitors to single-phase motor.
1- In the original structure , the main coil and the auxiliary coil are powered at the same time and the same electromagnetic force is generated to cancel each other ,and the rotor can not rotate.
2- to make the magnetic field force rotate , it can be achieved by passing alternating current current of different phase sequences in the main coil and the auxiliary coil .
the existence of the coil capacitor fulfills this function.
when the motor accelerates to a certain value, the centrifugal switch is disconnected, and the motor runs at the rated speed.
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