关键词: 铁氧体, 磁阻转矩, 混合永磁辅助同步磁阻电机, 成本优化

Abstract: Due to the particularity of rare earth materials, their manufacturing costs are gradually increasing, while the cost of ferrite materials is relatively low. In the motor design, it can be considered to replace part of NdFeB to save costs. The mathematical model of the permanent magnet-assisted synchronous reluctance motor was established, and its electromagnetic torque equation were derived. The motor was initially designed according to the performance requirements, and three hybrid permanent magnet solutions were proposed and compared.By comparing the performance and anti-demagnetization ability of these three schemes, the optimal scheme was selected and the torque was optimized, and the safety of the scheme was verified. The optimized scheme was compared with the NdFeB motor based on performance and cost. Compared with the NdFeB motor, the optimized hybrid permanent magnet scheme has increased torque ripple and stack length, but the cost is reduced by 6 %, the reluctance torque is increased by 10.8%, which has certain practical value.

Key words: ferrite, reluctance torque, hybrid permanent magnet-assisted synchronous reluctance motor, cost optimization