转子辅助槽对高速电主轴齿槽转矩的影响机理研究

Study on Influence of Rotor Auxiliary Groove on Gear Groove Torque of High Speed Motorized Spindles

针对高速永磁同步电主轴中永磁体与有槽铁心相互作用产生的齿槽转矩过高,从而导致电主轴产生振动与噪声的问题,通过在转子齿上开辅助槽来优化电主轴结构。以一台FL系列永磁同步电主轴三相星接Y型电机为模型,利用Ansoft软件对它进行运动仿真和磁场瞬态分析,得到了能有效削弱电主轴齿槽转矩的转子齿辅助槽设计方案。研究结果表明,在转子上选择合理的辅助槽位置和深度,齿槽转矩较优化前降低23.8%,并且对电主轴的性能几乎没有影响。

The cogging torque generated by the interaction between the permanent magnet and the slotted iron core in the high-speed permanent magnet synchronous electric spindle is very high,which leads to the vibration and noise of the electric spindle.The structure of the electric spindle is optimized by opening the auxiliary slots on the rotor teeth.Using an FL series permanent magnet synchronous electric spindle of the three-phased and star-connected Y-type motor as a sample model,the Ansoft software is used to perform kinematic simulation and magnetic field transient analysis.Then,a rotor cogging slot design that can effectively reduce cogging torque is made.It is shown that by selecting a reasonable auxiliary slot position and depth on the rotor,the cogging torque is reduced by 23.8%compared with that before the optimization,and this optimization has little effect on the performance of the electric spindle.