This article compares the electromagnetic performances of doubly salient permanent magnet (DSPM) machines with different stator iron core segments. Since the permanent magnets (PMs) of the DSPM machines studied in this article exist in pairs, the feasible numbers of PMs in the 12/8-pole DSPM machine are 12, 6, 4, and 2, and thus, the corresponding stator tooth number between two adjacent PMs is 1, 2, 3, and 6, respectively. Therefore, the stator iron core segments of the four DSPM machines have different shapes. Furthermore, to improve the average torque, PMs are inserted into the slots, and flux focusing teeth are adopted. All four machines are designed to achieve larger average torque under the fixed copper loss and envelope size. The comparison shows that the DSPM machine with two stator teeth between adjacent PMs exhibits the largest average torque and the smallest torque ripple. Moreover, the DSPM machine with six stator teeth between two adjacent PMs has the optimal PM utilization. To verify the predicted results, a 12/8-pole DSPM prototype with two stator teeth between adjacent PMs is manufactured and tested.

中文翻译：

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不同定子铁芯段双凸极永磁电机电磁性能比较


本文比较了具有不同定子铁芯段的双凸极永磁 (DSPM) 电机的电磁性能。由于本文研究的 DSPM 电机的永磁体 (PM) 成对存在，因此 12/8 极 DSPM 电机中可行的 PM 数量为 12、6、4 和 2，因此相应的定子齿数两个相邻 PM 之间的数量分别为 1、2、3 和 6。因此，四台 DSPM 电机的定子铁芯段具有不同的形状。此外，为了提高平均扭矩，将永磁体插入槽中，并采用磁通聚焦齿。所有四台机器均设计为在固定铜损和包络尺寸的情况下实现更大的平均扭矩。比较表明，相邻永磁体之间具有两个定子齿的 DSPM 电机表现出最大的平均扭矩和最小的扭矩脉动。此外，在两个相邻永磁体之间具有六个定子齿的 DSPM 电机具有最佳的永磁体利用率。为了验证预测结果，制造并测试了相邻 PM 之间具有两个定子齿的 12/8 极 DSPM 原型。