永磁体助磁的单相双凸极电机优化设计

Optimal Designing of Permanent-magnet-assisted Single-phase Doubly Salient Motor

针对永磁体助磁的单相双凸极电机优化设计问题开展了研究,推导出电机理想运行工况下的基本方程,并结合开关磁阻电机的设计原则总结出该电机的设计步骤。文中采用锥形气隙实现电机的自起动,然后利用总结的设计步骤设计了一台额定功率45 W,额定转速2 000 r·min^-1的永磁体助磁的单相双凸极电机。通过仿真计算电机主要结构参数对效率和齿槽转矩的影响并归纳出其规律性,为电机优化提供了参考。文中讨论了锥形气隙比率与电机起动能力的关系,并利用田口实验设计方法对电机进行了优化。优化后电机效率为89.86%,相比优化前提高了4.46%,证明了电机设计及优化的有效性。

In this paper,the optimization design of permanent-magnet-assisted single-phase doubly salient motor is studied.The basic equations for the ideal operating condition of the motor are derived,and the design step of the motor are summarized by referring to the design principle of the switched reluctance motor.Self-starting of the motor is achieved by using a tapered air gap.A permanent-magnet-assisted single-phase doubly salient motor with power rating of 45 W and rated speed of 2000 r·min^-1 is designed by using the summarized design step.The influence of the main structural parameters of the motor on the efficiency and cogging torque is calculated by simulation,and its regularity is summarized,which provids a reference for motor optimization.The relationship between the ratio of the tapered air gap and the starting ability of the motor is discussed,and the motor is optimized by Taguchi experimental design method.The optimized motor efficiency is 89.86%,which is 4.46%higher than that before optimization,vorifying the effectiveness of motor design and optimization.