Why do you need to add a capacitor on the motor?

The AC motor needs to be connected to a capacitor. Simply speaking, the capacitor is to make a phase difference, and the motor magnetic field is "asynchronous", and the motor rotates.

Capacitors are used to separate the phases, and the intention is to cause the currents in the two groups to have a phase difference of approximately 90 , to generate a rotating magnetic field. In three-phase power, the current between each two phases has a phase difference, and no phase separation is required. A capacitive induction motor has two windings, a starting winding and a running winding. The two windings are spatially different by 90 degrees. A large-capacity capacitor is connected in series on the starting winding. When the running winding and the starting winding pass through a single alternating current, the current in the starting winding is at a 90-degree angle from the running winding current at the moment because of the capacitor effect. value. Two identical pulsed magnetic fields are formed in time and space, so that a rotating magnetic field occurs in the air gap between the stator and the rotor. Under the effect of the rotating magnetic field, an induced current occurs in the rotor of the motor, and the interaction between the current and the rotating magnetic field occurs. The electromagnetic field torque causes the motor to rotate.