The motor has 2 linear coils, a main motor linear motor coil and an auxiliary coil. As a single-phase sinusoidal current passes through the main circuit, the main circuit generates an alternating pulsating magnetic field. The strength of this magnetic field changes at any time with the sinusoidal current, but always remains 1 -3 change direction.
A single phase motor will not rotate after 90 degrees of rotation without the force provided by the other motor linear motor coils. In order to make it rotate, the primary inductive coil, the force provided by the secondary linear coil, is required in the direction of the primary motor linear motor coil. If you want the auxiliary linear coil to provide a force perpendicular to the main coil, you have to supply another phase current to the auxiliary coil. If the same phase current is introduced, their force direction is the same. But only single phase electricity. Single phase What about the motor? In this case, a capacitive phase shift will be employed. In short, the capacitor is connected in series to the circuit that needs a phase shift to change the current phase.
First, sinusoidal alternating current enters from point A, part of which supplies power to the main motor linear motor coil, and the other part is phase-shifted by the capacitor. Before and after the electrical phase, the magnetic field force generated by the linear coil is also forward and backward. In this way, the thrust of the primary linear coil can be realized, Then the thrust and rotation of the secondary linear coil. To reverse the single-phase motor, just replace the power cord connected at point A with point B in the above figure, and the power cord connected at point C will not move. The former primary coil uses Zero-phase sinusoidal alternating current, the latter uses phase-shifted sinusoidal alternating current. After the power line is switched to point B, the secondary motor linear motor coil uses zero-phase sinusoidal alternating current, and the main coil uses sinusoidal alternating current after phase-shifting. When the current phase changes, 2 The direction and direction of rotation of the magnetic field force generated by the coil also changes.