定子开槽加斜槽抑制永磁同步电机噪声研究

Study on Noise Suppression of Permanent Magnet Synchronous Motor by Stator Slotting and Chute

为抑制永磁同步电机的噪声,本文以表贴式永磁同步电机为研究对象,首先分析了电机的噪声理论,其次从振动噪声产生的机理出发,提出利用定子开槽加斜槽手段对电机定子进行优化。首先对两种模型进行仿真分析,分别计算了不同结构电机的气隙磁场,从而对比分析了两种结构电机的径向电磁力谐波、径向磁密谐波与齿槽转矩,其次对电机进行谐响应分析,计算了优化前后两种结构电机的声压级,确定了采用定子开槽加斜槽的方法可以降低电机的电磁噪声,最后为验证仿真的准确性,按照仿真优化后的结构生产了一台电机,并搭建了实验测试平台,经测试噪声结果与仿真结果基本吻合,验证了仿真的准确性,证明了通过电机定子开槽加斜槽的方式可以降低永磁同步电机的噪声。

In order to suppress the noise of permanent magnet synchronous motor,this paper takes a table-mounted permanent magnet synchronous motor as the research object.Firstly,the noise theory of the motor is analyzed.Secondly,according to the mechanism of vibration noise,the stator slotting and chute method is proposed to optimize the stator of the motor.Firstly,the two models were simulated and analyzed,and the air-gap magnetic fields of the motors with different structures were calculated respectively,so as to compare and analyze the radial electromagnetic force harmonics,radial magnetic density harmonics and cogulation torque of the motors with the two structures.Secondly,the harmonic response of the motors was analyzed,and the sound pressure levels of the motors with the two structures before and after optimization were calculated.Finally,in order to verify the accuracy of simulation,a motor was produced according to the structure optimized by simulation,and an experimental test platform was built.The test noise results were basically consistent with the simulation results,and the accuracy of simulation was verified.It is proved that the noise of permanent magnet synchronous motor can be reduced by slotting and slotting the stator.