车用内置径向式永磁同步电机的降振优化设计

为降低永磁同步电机径向电磁力所引起的电磁振动噪声,基于电磁场、结构场以及声场有限元分析方法,提出了一种基于隔磁磁桥偏移的优化方法.以一台车用内置径向式永磁同步电机为研究对象,将电机隔磁磁桥所在位置沿转子外径的圆周轨迹向磁极方向偏移,同时对隔磁磁桥相邻间距与隔磁磁桥长度进行优化,在综合考虑电机振动噪声水平与电机性能的前提...

Optimal design of vibration reduction of interior radial permanent magnet synchronous motor for vehicle

In order to reduce the electromagnetic vibration noise caused by the radial electromagnetic force of permanent magnet synchronous motor,an optimization method based on magnetic bridge offset was proposed based on the finite element analysis method of electromagnetic field,structure field and acoustic field.Taking an interior radial permanent magnet synchronous motor for vehicle as the research object,the position of the magnetic isolation bridge of the motor was shifted to the magnetic pole direction along the circumferential track of the outer diameter of the rotor,and the adjacent distance between the magnetic isolation bridge and the length of the isolation magnetic bridge were optimized.The offset distance of the magnetic bridge was set as 4 mm considering the vibration noise level and the performance of the motor.The radial electromagnetic force,rotor force,motor modal and electromagnetic vibration noise were simulated and analyzed before and after the motor optimization.The results show that the average electromagnetic vibration noise of the motor can be reduced by 16.77% by this optimization method,the noise of the motor can be effectively reduced,but it has little impact on the performance of the motor.The optimization method based on the magnetic bridge offset can improve the motor noise level,which provides some reference for the optimal design of permanent magnet synchronous motor and the suppression of electromagnetic vibration noise for vehicle.