Why does a single motor have a series of capacitors
Also useful short circuit ring, but the string capacitor is more. Starting needs.
In a three-phase current, the current in each phase of the phase is in itself a phase difference. 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 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, make the air gap between the stator and the rotor produces 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. This is why uniphase motors are connected to capacitors.
As we all know, the rotation of the ac motor on electric current produced by a rotating magnetic field, and single-phase motor is different from the three-phase motor, three-phase motor through 120 degrees is the difference in phase and three phase current, can produce a rotating magnetic field; And single phase motors through the single phase current does not produce a rotating magnetic field, need to take some methods to make it produce a rotating magnetic field, using capacitance is one method, which is the most common method, capacitance is used to split phase, the purpose is to make two spare set of the current produce nearly 90 ゜ phase difference, in order to produce a rotating magnetic field.
