Structure principle and classification of Hybrid Excitation Motor

Hybrid excitation motor has two excitation sources: electric excitation and permanent magnet excitation. It has the advantages of convenient air gap magnetic field adjustment, high power density, wide voltage and speed adjustment range, etc. It has broad application prospects in industrial drive, new energy power generation and aerospace fields. Based on the magnetic adjustment principle of hybrid excitation motor, this paper summarizes the existing main classification methods and gives the equivalent magnetic circuit diagram. According to that coupling relationship between the permanent magnet magnetic circuit and the electric excitation magnetic circuit, the hybrid excitation motor is divided into series type, parallel type and parallel type, and further classified into stator main body type, rotor main body type and average type according to the placement position of the permanent magnet and the excitation winding. The typical motor structure and magnetic circuit characteristics are introduced.