This paper reports an optimal technique to design a fully superconducting motor. A 50-kW-class fully superconducting induction/synchronous motor with both rotor and stator windings was fabricated from bismuth–strontium–calcium–copper-oxide (BSCCO) tapes and quantitatively characterized. The toroidal structure was adopted for the stator windings in order to increase their critical current in the iron core, and a squirrel-cage structure was used for the rotor windings. The three-phase AC loss was measured in atmospheric liquid nitrogen (77 K), and characterized as a function of the stator current and its frequency. Nonlinear self-inductance as well as mutual- inductance of the silicon steel core was estimated based on experimental and analytical methods. These nonlinear parameters were introduced into the voltage equations and then coupled with the equation of motion. The measured load characteristics were quantitatively reproduced despite complex nonlinear parameters.

本文报告了设计全超导电动机的最佳技术。用铋-锶-钙-铜氧化物（BSCCO）胶带制成具有转子和定子绕组的50 kW级完全超导感应/同步电动机，并进行了定量表征。定子绕组采用环形结构以增加其在铁芯中的临界电流，而转子绕组则采用鼠笼式结构。在大气液氮（77 K）中测量了三相交流电损耗，并根据定子电流及其频率进行了表征。基于实验和分析方法，估算了硅钢芯的非线性自感以及互感。这些非线性参数被引入电压方程，然后与运动方程耦合。尽管有复杂的非线性参数，也可以定量地重现所测得的负载特性。