新型永磁屏蔽电机性能研究

Performance Research of a New Type of Permanent Magnet Canned Motor

在分析传统的有转子铁心永磁屏蔽电机的基础上,研究了一款适用于管道屏蔽电泵的新型结构永磁屏蔽电机。该电机无转子铁心,永磁体极弧系数为1。采用二维瞬态有限元方法对两种结构电机进行了磁场分析,计算了定转子屏蔽套的涡流损耗以及各种损耗,获得电机性能参数。计算结果表明,与同功率的有转子铁心永磁屏蔽电机相比,无转子铁心永磁屏蔽电机不仅结构更简单、成本更低,而且效率更高。

On the basis of a permanent magnet （PM） canned motor with rotor iron core, a new structure of PM canned motor was analyzed for the pipe pump. A pole embrace of unity for the rotor was used and the motor had no rotor iron core. In addition, the magnetic field, the losses and the performance of the two types of motors were calculated using a 2D transi- ent finite element （FE） method. The presented results show that the new structure of PM canned motor not only has the ad- vantage of more simple structure, lower cost, but also has a higher efficiency than the same power of PM canned motor with a rotor iron core.