高温超导磁通切换电机励磁线圈电磁力计算

In a high-temperature superconducting flux-switching motor, the alternating armature reaction magnetic field causes the high-temperature superconducting excitation coil to be subjected to an alternating electromagnetic force. An excessive electromagnetic force leads to deformation of the high-temperature superconducting excitation coil and may even cause physical damage to it, affecting the safe and stable operation of the motor. Therefore, taking a static-sealed high-temperature superconducting flux-switching motor as an example, this paper studies the electromagnetic force borne by a single turn of wire of its high-temperature superconducting excitation coil. By using three-dimensional finite element analysis and combining with Maxwell's equations, under the conditions of considering the Meissner effect and the skin effect, a calculation method for the electromagnetic force borne by a high-temperature superconducting wire is proposed. On this basis, the inter-turn electromagnetic force of the high-temperature superconducting wire is further calculated. The finite element simulation results verify the correctness of this calculation method.

高温超导磁通切换电机中交变的电枢反应磁场使得高温超导励磁线圈受到交变的电磁力作用，过大的电磁力导致高温超导励磁线圈产生形变，甚至有可能致使高温超导励磁线圈发生物理性损坏，影响电机的安全稳定运行。由此，本文以静密封高温超导磁通切换电机为例，对其高温超导励磁线圈单匝线材所承受的电磁力进行研究。利用三维有限元分析，并结合麦克斯韦方程，在计及Meissner效应和趋肤效应的条件下，提出了一种高温超导线材所承受电磁力的计算方法，在此基础之上，进一步计算得到了高温超导线材的匝间电磁力。有限元仿真结果验证了该计算方法的正确性。