Single-phase motors are widely used in the field of household appliances, mainly including air conditioners, refrigerators, washing machines, electric fans, etc. In these household appliances, single-phase motors are usually used to drive compressors, fans, water pumps and other components. Single-phase motors are mainly of series-excited, excitation-excited, asynchronous and other types. They are popular among household users due to their low power, small size and high reliability.