实用效果表明厚度精度提高一倍以上，同时宽度波动可大为减小。
The practical effect is that the thickness accuracy is raised more than double, as the same time the fluctuation of width is greatly reduced.
计算了不同磁极宽度情况下的电机推力，结果表明采用该方法可以有效减小电机的推力波动。
The FEM calculation results prove that the thrust fluctuation of the motor can be effectively cut down with proposed method.
从而为合理选择极弧宽度，达到减少电磁转矩波动的目的提供了一种有效途径。
Thus an effective way to design the polar arc width reasonably in order to reduce torque ripple is provided.
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