Working principle of motor coil

Single-phase motor has two inductor coils, the main coil and the secondary coil pass through the main coil with the single-phase sinusoidal current, and the main coil generates an alternating pulsating magnetic field. The strength of this magnetic field will make the sinusoidal current change at any time, but it always keeps the direction of 1-3 If no other coil to provide force, no longer turn after single-phase motor rotated 90 degrees To make its turn, should also on the direction of the main coil, force provided by the main coil and secondary coil If you want to make the auxiliary coil provides a force perpendicular to the direction of the main coil, you must provide another phase current to the secondary coil If access to the same phase current, So they produce force in the same direction but they only have single-phase electricity. So what about single-phase motors? In short, the capacitor is connected in series to the circuit requiring phase shift to change the current phase. First, sinusoidal alternating current enters from point a, part of which supplies power to the main coil, and the other part moves the phase of the two phases through the capacitor, and the magnetic field force generated by the coil also goes back and forth In this way, can achieve the main coil thrust, then the secondary coil of thrust and rotation To strengthen single-phase motor reversal, need to connect the above point A of switch power supply cord to the point B, and the connecting point C to the power cord Because the main coil before transformation is a sinusoidal alternating current (ac), the use of zero phase after secondary coil is the use of phase shift and transformation of sinusoidal alternating current After the power line is switched to point B, the secondary coil uses zero-phase sinusoidal alternating current, and the main coil uses sinusoidal alternating current after phase shift. When the current phase changes, the direction and rotation direction of the magnetic field force generated by the two coils will also change。