Why does ac power connect capacitor
A large start current is provided to enable the motor to start successfully.Use the capacitance to change the Angle of the electric phase, causing the electrical Angle to leak 90 degrees.
The purpose of ac motor capacitance is to transfer the single phase alternating current to a phase difference of 90 degrees. The two phase alternating current (ac) into two groups and four groups, each motor coil winding, is formed in the motor rotating magnetic field, rotating magnetic field to produce induced current in the motor rotor, rotating magnetic field and the magnetic field produced by induced current in the opposite direction, by rotating magnetic field into a state push-pull rotation.
Single-phase motors mostly use capacitance. When single-phase electric current flows through the motor does not produce a rotating magnetic field, need to take the capacitor is used to split phase, the purpose is to make two winding of the current produce nearly 90 ゜ phase difference, in order to produce a rotating magnetic field. The capacitor induction motor has two winding, namely the starting winding and the running winding. The two windings vary by 90 degrees in space. String on the startup winding capacity of a large capacitor, when running and start the windings by single phase alternating current (ac), because of capacitor in the startup winding current on time than the running winding current advance Angle of 90 degrees, to reach the maximum value. In time and space form two of the same pulse magnetic field, in the air gap between the stator and the rotor creates a rotating magnetic field, under the effect of rotating magnetic field, the induced current in the motor rotor, current and rotating magnetic field interact to produce electromagnetic torque, motor rotation.
A single phase motor is used to start a three-phase motor for the use of reactive power compensation
