Abstract：Preliminary study of vertical type of magnetic bearings is reported, which are composed of a superconducting stator with several yttrium-barium-copper-oxide(YBCO) quasi-single domains and a Nd-Fe-B permanent magnetic rotor. The rotor consists of a spindle, a permanent magnet and a flywheel. Driven by a variable-frequency three-phase induction motor, the maximum rotational speed of the rotor is up to 15 000r/min. The resonant frequency of the rotor system is observed near f0～25Hz with maximum radial vibration amplitude about ±170μm. The rotor motion is observed of stable between 35～200Hz, and is with maximum radial vibration amplitude about ±50μm. The results reveal that the losses in magnetic bearings are mainly induced from magnetic hysteresis loss and eddy-current loss. And the asymmetrical magnetic distribution as well as flux creeps may be responsible for the rotational loss.
邱傅杰, 徐克西, 盛培龙. 小型飞轮储能系统高温超导磁悬浮轴承[J]. 电工技术学报, 2014, 29(1): 181-186.
Qiu Fujie, Xu Kexi, Sheng Peilong. Small-Scale Flywheel Energy Storage System Equipped with High Temperature Superconducting Magnetic Bearing. Transactions of China Electrotechnical Society, 2014, 29(1): 181-186.
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