Why should ac motors be used in parallel with capacitors
You say "ac motor" all have no rotational moment!!! With capacitor in parallel to the two sent 90 degrees (jet lag) rotational torque coils, potential difference (90 degrees) to stagger time (small single-phase motor) it mainly provide starting torque
A capacitor is usually a single phase, or 220V motor. The capacitors it takes are usually strung together in so-called starting coils, not in parallel. You know that in a three-phase machine, you have three phase electrical connections, so you have a rotating magnetic field. This magnetic field drives the rotor. There is only one phase of the single phase motor. If a single phase motor does not start the coils and start the capacitance, it will not be able to form a rotating field with a single phase connected motor.
It is. The motor will not work. In order to be able to in the case of single phase can also produce a rotating magnetic field, the designers in multiple access a coil at the same time, through a capacitor on the coil, leading to join this coil phase voltage phase shift. So it's going to be a single phase in the outside and it's already going to be a double phase. The two phases produce a rotating magnetic field. The principle of connection is illustrated
