双定子高温超导电机阻尼绕组对超导励磁磁场及电枢反应磁场作用机理分析

基于静态密封双定子高温超导电机（DS HTSM）中的静止气隙磁导模型，采用理论公式与有限元仿真相结合的方法分析阻尼导条对磁场的影响。按照磁力路径推导出内气隙磁密，通过建立等效阻尼电路模型，得到其在超导线圈附近感应的反交流谐波，通过有限元仿真进行验证。分析结果表明，鼠笼式阻尼导条可以在基本不影响DS HTSM励磁磁场的同时，削弱基波电枢反应磁场对超导线圈的影响。

Mechanism Analysis of the Influence of Damper Coils of DS-HTSM on Superconducting Excitation Field and Armature Reaction Field

Based on the model of static air gap permeance of the double-stator high temperature superconducting machine (DS HTSM) with the stationary seal, the influence of damper coils on magnetic field is analyzed by using the analytical method and the finite element method. The inner air gap magnetic flux density is deduced according to the path of the armature magnetic field. Then, the equivalent electric circuit model of damper coils is built and the alternating harmonic induced near the superconducting coils is derived, which is then verified by finite element simulation. The results show that the squirrel cage damper coils can effectively weaken the negative influence of the fundamental harmonic of the armature reaction field on the superconducting coils and the excitation field of DS HTSM is basically uninfluenced.