pole arc

The harmonic influence of each structural parameter on the fractional slot motor can be achieved by changing four structural parameters in turn. The four structural parameters are width of slot opening, air-gap size, pole arc coefficient and thickness of magnet.

其次通过逐次改变影响电机转矩脉动的四种结构参数，其包括槽口宽度，气隙尺寸，极弧系数和永磁体厚度，找到每种结构参数对分数槽永磁电机齿谐波影响的映射关系。

The combinations between stator pole and rotor pole, the ratio of stator pole arc width to pole distance and the phase winding connections are further analyzed for the new element generators with single-phase, two or four-phase and five-phase DSEG.

讨论了单相、两相/四相和五相DSEG单元电机新结构定、转子配合关系，定子极宽与定子极距之比以及电枢绕组元件连接方式。

Study of Water Wheels Generator Pole Arc Distribution

水轮发电机极弧分布规律的研究

The cause of producing pulsatile torque is analyzed, and some measures for weakening pulsatile torque are analyzed, which includes fractional slot winding, reasonable pole arc coefficient and skew stator slot.

分析低速传动中产生转矩脉动的原因，并探讨采用分数槽绕组、合理设计极弧系数以及斜槽等削弱转矩脉动方法的有效性。

In this paper, the method to calculate the pole arc coefficient is got. ( 3) The reduction method of cogging torque by different slot width pairing is studied.

本文分析了平行充磁永磁直流电机极弧系数对齿槽转矩的影响，得到了极弧系数的确定方法。（3）分析了不等槽口宽配合削弱齿槽转矩的方法。