基于气隙变化的开关磁阻电机结构优化设计

针对电动汽车用开关磁阻电机转矩脉动大的问题，深入分析了电感、磁路饱和程度、径向力等对转矩及转矩脉动产生的影响，提出了设计并优化定子斜齿结构的方案，通过建立坐标系，用方程表示定子斜齿前沿所在直线和转子的运动轨迹，推导了转矩随定子结构改变的直接变化关系。对不同定子齿结构进行有限元仿真，验证理论推导，对比转矩脉动、最大转矩、电感、磁密等参数，确定最优定子斜齿结构。研究结果表明:通过电机优化设计，最大转矩增加20.8Nm，平均转矩增加23Nm，转矩脉动下降13%，提高了转矩输出能力，减小了转矩脉动。

Structure Optimization Design of Switched Reluctance Motor Based on Air Gap Change

Aiming at the problem of large torque ripple of the switched reluctance motor for electric vehicles, the effects of inductance, magnetic circuit saturation, and radial force on the torque and torque ripple were analyzed in depth, and a scheme for designing and optimizing the stator helical gear structure was proposed. A coordinate system was established, then used equations to represent the straight line where the leading edge of the stator helical teeth and the motion trajectory of the rotor, last the direct relationship between the torque and the stator structure was deduced. Different stator tooth structures were analyzed by the finite element method, the theoretical derivation was verified,and the torque ripple, maximum torque, inductance, magnetic density and other parameters were compared to determine the optimal stator helical tooth structure The research results show that: through the optimized design of the motor, the maximum torque is increased by 20.8Nm, the average torque is increased by 23Nm, and the torque ripple is reduced by 13%, which improves the torque output capability and reduces the torque ripple.