定子励磁型混合磁路直线旋转永磁电机磁路设计与实验研究

Aiming at the two degree of freedom (DOF) drive requirements in linear and rotary motion of intelligent equipment systems, a stator excited hybrid magnetic circuit linear and rotary permanent magnet (SEHMC-LRPM) motor is proposed. The motor features the axial and radial double salient tooth structure, as well as, the linear motion flux in axial direction and the rotational motion flux in radial direction share the same stator and rotor magnetic circuits. The permanent magnet is arranged on the stator, and the mover has neither winding nor permanent magnet. The mover structure is simple and firm, light in weight, and feature high torque-to-inertia ratio, fast dynamic response speed and high reliability. In addition, the linear and rotary windings are set in the stator simultaneously, and the linear and rotary motion control is independent, which can reduce the complexity of the two-degree-of-freedom drive control. The operation principle and topology characteristics of the motor are analyzed, and the characteristics of the hybrid magnetic circuit is discussed. The equivalent magnetic circuit model is constructed, and the motor is designed. On this basis, the hybrid magnetic circuit and the two DOF coupled magnetic field are investigated based on the 3D finite element method. The relationship between the two DOF magnetic field and the motor magnetic field distribution, no-load and load characteristics is revealed. Finally, a prototype was manufactured, and the experimental study was carried out to verify the validity of the motor and the correctness of the theoretical analysis.