摘要
介绍了采用氧化物超导体钇钡铜氧（YBCO）准单畴块材作为定子构件、钕铁硼永磁体作为转子构件的立式全超导磁悬浮轴承初步研究结果。其中，转子系统由转轴、永磁体和飞轮共同组成，在三相调频感应电机驱动下，转子系统最高试验转速可达15000r／min。初步测试结果（0-200Hz）显示，在转动频率而接近25Hz系统发生共振，共振时转子最大径向摆动约为±170um。在35-200Hz范围内转子运行状态稳定，最大径向摆动约为±50um。实验结果显示，超导磁悬浮轴承转动损耗主要来自磁滞损耗和涡流损耗，而磁场分布不均匀性与超导定子材料的磁通蠕动可能是导致转动损耗的主要原因。
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 ±170um. The rotor motion is observed of stable between 35-200Hz, and is with maximum radial vibration amplitude about ±50um. 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.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第1期181-186,共6页
Transactions of China Electrotechnical Society
关键词
高温超导磁悬浮轴承
飞轮储能
临界转速
能量损耗
High temperature superconducting magnetic bearing, flywheel energy storage, critical rotational speed, energy loss
作者简介
邱傅杰 男，1989年生，硕士，研究方向为超导磁悬浮技术。
徐克西 男，1956年生，博士，教授，研究方向为超导磁悬浮技术。
