设计了一种基于超导磁悬浮轴承的微飞轮系统样机．该微飞轮系统以超导磁悬浮轴承作为支撑机构，以平面直流无刷电机作为驱动装置，在输入电压14．4V电流0．36A时，飞轮转子在空气中最高转速可达到15000rpm．通过对采用机械轴承的飞轮系统和超导磁悬浮飞轮系统的自由降速曲线测试，求出不同轴承的摩擦损耗，并得到超导磁悬浮飞轮系统在不同转速下的等效摩擦系数为0．001-0．007，发现超导轴承等效摩擦系数随着速度的增加而增加，分析表明随着转速增加，超导磁悬浮轴承涡流损耗和磁滞损耗增加．
A prototype of the micro-flywheel system with the superconducting magnetic bearing has been designed. This micro-flywheel system adopts the superconducting magnetic bearing as the supporting mechanism, and the brushless planar DC motor as driving device. The maximum speed of the flywheel rotor is 15000rpm at 14. 4V and 0. 36A. Through the test of flywheel system＇s free spin-down curve of speed with the mechanical bearings and the superconducting magnetic bearing, the friction loss of different bearing is obtained, and the equivalent friction coefficient of the superconducting flywheel system is 0. 001-0. 007 under different rotational speed. Equivalent friction coefficient of the superconductivity hearing is found to increase along with the speed. The analysis indicated that the superconductivity magnetic bearing eddy current loss and the hysteretic loss also increase along with the rotational speed.
参考文献
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