永磁体廓形对永磁同步电主轴转矩脉动的影响

The Influence of Permanent Magnet Profile on Torque Ripple of Permanent Magnet Synchronous Motorized Spindle

文章分析了永磁体表面廓形对永磁同步电主轴转矩脉动及噪声的影响。通过在永磁体表面进行开槽来降低转矩脉动,以达到抑制振动噪声的目的。槽形包括圆弧形、矩形、三角形、梯形等形状。其中梯形槽形状在不减少平均扭矩的情况下显著减少了转矩脉动。建立永磁体表面形状改进前后的三维模型,完成了谐响应和声场的计算,并对计算结果进行对比分析。指出该方法可有效地降低永磁同步电主轴转矩脉动和噪声。

This article analysis the effect of permanent magnet surface profile on torque ripple and noise of permanent magnet synchronous motorized spindle.The torque ripple is reduced by grooving on the surface of permanent magnet to achieve the purpose of suppressing vibration and noise. The grooves include the shape of arc, rectangle, triangle, trapezium and so on. The trapezoidal groove shape significantly reduces the torque ripple without reducing the average torque. By the three-dimensional models of improved and original the permanent magnet surface shape, the harmonic response and sound field calculation are completed. Results of harmonic response and sound field are compared and analyzed. It shows that the method can effectively reduce the torque ripple and noise of permanent magnet synchronous motorized spindle.