定子齿开槽对六相电机齿槽转矩的影响

针对六相永磁电机齿槽转矩过高引起振动和噪声问题，以一台12槽10极表贴式永磁电机为例，提出一种在定子齿开辅助槽的方法降低齿槽转矩。分析永磁电机齿槽转矩的工作原理，推导出齿槽转矩与开槽结构的解析关系；对定子齿开槽方法进行设计，进一步对辅助槽位置、数量和尺寸进行分析和优化；对开槽前后电机进行有限元仿真分析，并与初始电机进行性能对比。结果表明：定子齿开辅助槽对于抑制齿槽转矩有着显著作用，最大可减小约91.8%。结果验证了该方法的可行性和有效性。

Effect of Stator Tooth Slotting on Cogging Torque of Six-Phase Motor

Aiming at the vibration and noise problems caused by the excessive cogging torque of the six-phase permanent magnet motor,a 12-slot 10-pole surface-mount permanent magnet motor was taken as an example,and a method of opening auxiliary slots on the stator teeth was proposed to reduce the cogging torque.The working principle of cogging torque of permanent magnet motor was analyzed,and the analytical relationship between cogging torque and slotting structure was deduced.The stator tooth slotting method was designed.The position,number and size of the auxiliary slots were further analyzed and optimized.Finally,finite element simulation analyses for the motor before and after slotting were carried out,and performance comparisons were made with the initial motor.The research results show that the auxiliary slot of the stator teeth has a significant effect on suppressing the cogging torque,and the maximum reduction is about 91.8%.The experimental results prove the feasibility and validity of this method.