A high - speed generator is much different from a low - speed one not only on the mechanical aspect but also on the electrical - magnetic aspect . the main content of this paper are focused on the followings : first of all , a series of problems caused by the high speed are researched and the relative solutions are given out about the stator , the research focuses on stator losses , winding type , cooling system and so on 高速发电机转速很高，无论在机械性能方面，还是电磁性能方面都与低速电机有较大不同，本文主要内容就是围绕高速永磁发电机的设计特点从以下几个方面展开的：首先，对高速电机因高转速引起的一系列问题进行了研究，提出了解决相关问题的措施。
The result of research into electromagnetic beheaviours of polymeric magnets as follows : all of the two agents ( acrylic acid and polycarbonate ) can reduce effectively magnetic loss and dielectric loss , moreover , acrylic acid can increase the dielectric constant of the polymeric magnet at high frequency and microwave band . on the whole , the polymeric magnet modified by acrylic acid is preferable . the research of ir spectrum and xps of the polymeric magnets have showed that modifying polymeric magnet with acrylic acid is a chemical method in the part of composing polymer , we have chosen ferrocene as raw stuff 对改性前后高分子磁体的电磁性能研究结果表明：用丙烯酸或聚碳酸酯对高分子磁体进行表面改性，两种试剂均不影响高分子的磁导率，并且它们均有效地降低了高分子磁体的磁损耗和介电损耗，更有研究意义的足：丙烯酸使高分子磁体在高频微波下的介电常数得到明显提高：从总的方面来说，丙烯酸改性高分子磁体优于用聚碳酸酯改性的高分子磁体。
At different position and current , the normal force is calculated . this will be used to determine the force harmonics and hence to calculate the vibration resulting from the normal forces . the caculation results are very helpful to the reseach of noise and vibration of doubly salient motors 本文利用vfem对双凸极电机二维电磁性能进行分析，并对不同转子位置、不同绕组电流情况下的定转子径向磁吸力进行了详细计算，从而可以进一步研究径向力所引起的振动响应，这对于双凸极电机噪声和振动的研究有非常重要的实际意义。
So aimed at that , based on deep analyzing the eddy - current mechanism of the stator liners and rotor liners . this paper calculated the eddy - current with the multiple multipole theory by deploying the liners . according to the calculation result , the electromagnetic effect of the liners in the permanent magnet canned motor pump was analyzed 针对这一区别特征，本论文在对定、转子屏蔽套涡流产生机理分析的基础上，采用将屏蔽套展开的方法，利用多极理论求解了屏蔽套的涡电流损耗，从而分析了屏蔽套对电磁性能的影响。
