What is the function of a starting capacitor?

[DeRhett]

The starting capacitor is used to create a rotating magnetic field in a single-phase motor, enabling mechanical rotation. The reason is that the single-phase current flowing through a single-phase motor cannot generate a rotating magnetic field, so a capacitor is employed for phase splitting. The purpose is to create a phase difference of approximately 90° between the currents in the two windings, thereby generating a rotating magnetic field. Below is an introduction to capacitors: 1. Characteristics: It has the ability to charge and discharge, as well as block direct current while allowing alternating current to pass. 2. Types: (1) Charging of a capacitor: The two plates carry equal and opposite charges, and the absolute value of the charge on each plate is called the charge of the capacitor. (2) Discharging of a capacitor: The positive and negative charges on the two plates of the capacitor neutralize through a conductor. During the discharge process, a transient current is generated in the conductor.