Research on the operation mechanism and torque lifting method of stator electric excitation flux switching motor

Stator wound field flux switching (SWFFS) motors are gradually applied to electric vehicles, rail transit and other fields due to their armature windings and excitation windings are concentrated on the stator, so its stator and rotor structure is simple, and has the advantages of low production cost, wide speed regulation range, low vibration and noise, etc., and has broad development prospects. Due to the common problem of low torque density of rare earth motors, this paper analyzes the structure and operating principle of 24/14-pole SWEFS motor based on the background of vehicle-mounted low-voltage DC auxiliary power generation system, and uses the non-parallel stator cogging structure to improve the torque density of the motor, and significantly reduces the output torque ripple of the motor by adding the rotor pole shoe, and the feasibility of the structure is proved by finite element analysis.