Abstract：A small-capacity radial-type superconducting flywheel energy storage system (SFESS) prototype with an external motor was built for the levitation and rotation experiments. The structure of the prototype and its main components are introduced in detail. Through the potting process and the bonding process, two superconducting magnet stators (SMSs) were set up and tested respectively for levitation. Based on the established FEM mathematical model, the magnetic field distribution of the high-temperature superconducting (HTS) bearing as well as the current density in the HTS bulks during the running of the prototype was studied. The prototype was equipped with the SMS fabricated by the bonding process, and then the free rotations and radial vibration of the rotor at different steady-state speeds were measured. The variation law of the rotor radial variation amplitude was studied by the two-norm method. It is shown that the rotational characteristics are related to the rotor vibration. Below the resonant frequency, the vibration increases significantly with the increase of speed. Limiting rotor vibration amplitude by combined bearing system is an effective approach to improve system speed and mechanical stability.
余志强, 孙晓云, 邱清泉, 刘玉芝, 闻程. 电机外置式径向型高温超导飞轮储能系统样机悬浮测试及旋转实验[J]. 电工技术学报, 2019, 34(10): 2166-2175.
Yu Zhiqiang, Sun Xiaoyun, Qiu Qingquan, Liu Yuzhi, Wen Cheng. Levitation Test and Rotation Experiment of Radial-Type Superconducting Flywheel Energy Storage System Prototype with External Motor. Transactions of China Electrotechnical Society, 2019, 34(10): 2166-2175.
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2019, Vol. 34 
