To improve the driving torque and increase the inner space utilization rate of wheel hub motor on electric motorcycle, a double-stator permanent magnet motor was reported in this paper.
为充分利用电动摩托车轮毂电机内部空间，提高电机的驱动转矩，该文设计了一款双定子结构的永磁电动机。
It use the cylinder to control the moving of plane magnet, easy to operate, low breakdown rate.
采用气缸控制平面磁体移动，操作简单，故障率低。
The calculation shows that the pressure drops and the temperature decreases, but the gas rate increases from liquid helium main dewar to superconducting magnet dewar.
计算结果表明，氦工质从 液氦主杜瓦加注到磁体杜瓦的过程中，其压力和温度不断降低，而 含 气量不断增加。
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