机床转台直接驱动力矩电机的转矩优化设计

针对精密数控转台伺服直接驱动用多极永磁力矩电机的特殊应用问题(要求电机有较大的转矩密度且较小的转矩波动)，在分析该种电机的特殊结构的基础上，提出一种新型不等齿顶宽结构，以提高绕组利用系数，加大电机的转矩密度；并采用转子斜极的方法，可在有效消除转矩波动的同时，电机仍保持较高的绕组利用系数.对提出的两种方法分别进行了理论公式推导验证，用有限元仿真方法与传统等齿顶宽结构直极电机作比较，说明了所述设计方法的合理性和有效性.样机实测结果验证了理论分析的正确性.

Torque optimization of direct drive torque motor for machine rotary table

In view of special applications of multi-pole magnetic permanent torque motor used for precise numerical control rotary table, motors with higher torque density and lower torque ripples are needed. A new structure with unequal teeth tip width providing high winding coefficient was proposed. Meanwhile, another structure with rotor pole-skewing was preferred, which can decrease torque ripple has a high winding coefficient. Two schemes were respectively proved by theoretical formula and finite element method, and were compared with the traditional structure of equal teeth tip width and no-skewing using. The simulation results indicate the rationality and validity of new design methods. The experimental results validate the correctness of theoretical analysis.