弧分量

These results show that the choice of pole number and slot number has a significant effect on the performance and the proper choice of the pole-slot number combination and pole embrace can weaken the effect of output voltage harmonics and reduce usage of magnet material,as well as save cost,which are helpful to obtain the better performance.

结果表明：极槽匹配对直驱式风力永磁发电机性能有很大影响；通过合理选择极数、槽数以及极弧系数，可以减少输出电压谐波分量的影响，降低永磁材料的使用，节省成本，有助于直驱式风力永磁发电机获得良好的性能。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。