电枢绕组结构对PMSM最优驱动电流的影响

Optimal Drive Current of PMSM Affected By Armature Winding Structure

最优驱动电流可以减小永磁同步电机的转矩脉动和功率损耗。本文提出了计算带有表贴式磁钢转子的三相永磁同步电机的最优驱动电流的分析模型,并且对带和不带中线的电机进行了分析。所进行的分析表明,当绕组的反电势包含三重序列的谐波时,中性线对最优驱动电流的生成有明显的影响。采用中线时,最优驱动电流能够更有效地减小损耗和转矩脉动。本文利用两个典型的电机介绍了最优电流的影响,并且比较了这种驱动模式与传统的正弦驱动模式和BLDC驱动模式的的差别。所展示出的最优驱动模型对伺服控制这类高性能电机的运用具有积极的意义。

The optimal drive current can reduce both the torque ripple and power loss in driving the permanent mag- netic synchronous motor （PMSM）. This paper presents an analytical model for calculating the optimal drive current of the PMSM with surface mount PM rotor. Both the motors with and without the neutral line are analyzed. Theoretical analysis shows that, when the back-emf of the windings contains triple order harmonics, the neutral line of the motor can let the optimal drive current be different from the one without the neutral line, and it can also make the optimal drive current be more effective in the loss and torque ripple reduction. Two PMSMs are used in the analysis to show the influences of the optimal model presented for the winding with and without natural wire.