摘要
电磁振动噪声是电机噪声的主要来源,直接影响电机的NVH性能,而径向电磁力是产生电磁振动噪声的主要原因。针对9槽6极电机低阶径向电磁力产生振动噪声大的问题,首先基于Maxwell应力方程推导分析径向电磁力的表达式,指出定子电枢槽开口改变了空载径向电磁力最低非零阶数的现象;提出在定子齿顶开辅助槽的方法,对比研究了不同开槽数和开槽尺寸对气隙磁导的影响;通过定子齿开辅助槽改变气隙磁导分量,研究了不同开槽方式对低阶径向电磁力和齿槽转矩的影响,基于此确定合理的开槽方案并通过多目标算法获取电机最佳开槽参数。结果表明,对于分数槽永磁电机,定子齿开辅助槽能够有效降低电机空载低阶电磁激振力。
Electromagnetic vibration noise is the main source of motor noise,which directly affects the NVH performance of motor,and the radial electromagnetic force is the main cause of electromagnetic vibration noise.Aiming at the problem that the low order radial electromagnetic force of 9-slot 6-pole motor generates large vibration and noise,firstly,the expression of radial electromagnetic force was analyzed based on Maxwell stress equation.It was pointed out that the opening of stator armature slot changes the lowest non-zero order of radial electromagnetic force.The method of opening auxiliary slots at the top of stator teeth was proposed,and the influence of different slot number and slot size on the air gap permeability was studied.The effects of different slotting methods on the low order radial electromagnetic force and the cogging torque were studied.Based on this,a reasonable slotting scheme was determined and the optimal grooving parameters of the motor were obtained by multi-objective algorithm.The results show that for fractional slot permanent magnet motor,the stator opening auxiliary slot can effectively reduce the no-load low-order electromagnetic excitation force of the motor.
作者
罗超凡
赵世伟
邱小华
杨向宇
LUO Chaofan;ZHAO Shiwei;QIU Xiaohua;YANG Xiangyu(School of Electric Power,South China University of Technology,Guangzhou 510640,China)
出处
《微电机》
2024年第6期1-7,共7页
Micromotors
基金
广东省自然科学基金(2018A0303130221)。
关键词
内置式永磁同步电机
径向电磁力
定子辅助槽
齿槽转矩
电磁振动噪声
internal permanent magnet synchronous motor
radial electromagnetic force
stator auxiliary slot
cogging torque
electromagnetic vibration noise
