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CBB60 Motor Run Capacitor An Induced Current Is Generated In The Motor Rotor
- Jun 28, 2017 -

Why do a lot of motor start when the need for capacitance?

Simply say that the capacitor is to produce a phase difference, and let the motor magnetic field "asynchronous", the motor on the rotation.

The single-phase asynchronous motor consists of the main winding (also known as the operating winding) and the secondary winding (also known as the starting winding),CBB60 Motor Run Capacitor the two windings in the space difference of 90 ° electrical angle. Capacitor phase separation after the two windings into the phase of the alternating current, the motor will produce rotating magnetomotive force.

If only the main winding into the single-phase AC, the motor generated for the pulsating magnetomotive force, it can be decomposed into two equal size, the same speed,CBB60 Motor Run Capacitor turn the opposite rotating magnetomotive force. The two oppositely magnetomotive magnetic fields act on the rotor, and the magnitude of the electromagnetic moments generated at rest is in the opposite direction and can not be started.

If the main winding and the number of turns equal to the winding, the space difference of 90 ° electrical angle, into the 90 ° phase difference of alternating current,CBB60 Motor Run Capacitor then the motor will produce a circular rotating magnetic field, the motor rotor in its role with its rotation.

If the two windings are asymmetrical, the phase difference between the two currents is not equal to 90 °, and the elliptical rotating magnetic field in the motor is decomposed into a larger, smaller circular rotating magnetic field with the same rotational speed ,CBB60 Motor Run Capacitor The motor rotates along the direction of rotation of the magnetic field of the larger magnetomotive force. Changing the front end of the secondary winding (or the first end of the primary winding) changes the direction of the elliptical rotating magnetic field and the motor can be reversed. But at the same time change the winding of the two ends of the motor does not change the steering.

Single-phase motor must have two sets of space for the 90 ° electrical angle of the winding, and through a certain phase of the AC will produce a rotating magnetic field, the motor will start and rotate along the rotating magnetic field rotation.

Strictly speaking, can not distinguish between the voltage level of the motor, the so-called 220V, 380V is just our daily short name only, here should be said that single-phase and three-phase.

AC motor rotation depends on the current generated by the rotating magnetic field. Three-phase motor flows through the phase difference of 120 degrees of three-phase current, can produce rotating magnetic field. And single-phase motor flow through the single-phase current can not produce a rotating magnetic field,CBB60 Motor Run Capacitor need to take a certain way to produce a rotating magnetic field, with the capacitor is one of the methods, but also the most common method is used to split the capacitor, the purpose is to make two The current in the Rao group produces a phase difference of approximately 90 ゜ to produce a rotating magnetic field. Three-phase electricity, the current between the two phases itself has a phase difference, do not split phase.

Capacitive induction motors have two windings, namely, start winding and operating windings. The two windings are spatially different by 90 degrees. A capacitor with a larger capacity is connected in series with the windings. When the winding and the start winding are connected via a single alternating current,CBB60 Motor Run Capacitor the current in the starting winding is in the order of 90 degrees above the current of the operating winding due to the effect of the capacitor. value. Forming two identical pulsed magnetic fields in time and space, creating a rotating magnetic field in the air gap between the stator and the rotor. Under the action of the rotating magnetic field, an induced current is generated in the motor rotor, and the current interacts with the rotating magnetic field Electromagnetic field torque to rotate the motor.