两相4/2极高速开关磁阻电机多阶气隙优化

Optimal design of multi-stepped air gap based on two phase 4/2 poles high speed switched reluctance motor

针对传统两相4/2极高速开关磁阻电机运行过程中转矩死区和大转矩波动这一问题,对传统开关磁阻电机数学模型中影响转矩死区和转矩波动的因素进行了研究,提出了一种基于两相4/2极开关磁阻电机的多阶阶梯式气隙设计的优化方案。利用Matlab拟合生成了气隙长度与气隙电感大小关系曲线,得到了不同阶数开关磁阻电机模型下阶梯式气隙各阶气隙长度的最优解,采用Maxwell 2D静态和动态仿真计算,计算了静态转矩波动系数、静态合成平均转矩和动态转矩波动系数等参量,分析比较了不同阶数的阶梯式气隙开关磁阻电机模型的电机运行情况。研究结果表明:采用多阶气隙极弧优化设计方法可以有效改善传统两相4/2极开关磁阻电机的运行情况,消除了转矩死区,降低了转矩波动,提高了运行质量。

Aiming at the problem of torque dead zone and large torque fluctuation during the operation of traditional two-phase 4/2 pole high-speed switched reluctance motor, it was analyzed that mathematical model of traditional switched reluctance motor and found that the impact factors of torque dead zone and torque fluctuation. And an optimization scheme of multi-step stepped air gap design was proposed. According to the relationship between pole arc diameter and air gap inductance which was obtained by Matlab fitting, the optimal solution of the pole arc diameters of the stepped air gap was found. Finally, the motor operation of the stepped air gap switched reluctance motor model with different orders were compared and analyzed by using Maxwell 2 D simulation. The results indicate that the optimal design of polar arc by multi-stepped air gap can effectively improve the operation of the traditional two-phase 4/2-pole switched reluctance motor and improve the operation quality.