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| Design of rimdriven attitude control flywheel motor |
| WANG Hui1,2, WU Jun-Feng1, WU Yi-Hui1 |
1.State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
2.Graduate School of Chinese Academyof Sciences, Beijing 100039, China |
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Abstract To improve the inertia / mass ratio of attitude control flywheel used in small satellite and lighten the weight of flywheel attitude adjustment system,a brushless DC motor used in flywheel was designed.According to the motor magnetic circuit,the corresponding relationship between the size and maximum energy of magnet was derived.The influence of magnetic circuit parameters on the flywheel performance was analyzed by using the Finite Element Method (FEM).For the flywheel structure feature of large equivalent airgap and large ratio of diameter to length,a method for calculating airgap magnetic flux density was proposed.The relationship between winding parameters and the motor rated data was established.Simulation method was used to analyze the motor performances.Compared with a flywheel motor with the angular moment of 5 Nms at the highest speed of 6 000 r/min,the maximum error is 65%,which proves the correctness of the design method．
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Published: 15 June 2012
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轮缘驱动式姿控飞轮电机设计
为了提高小卫星用姿控飞轮的转动惯量/质量比,实现飞轮调姿系统的轻量化,设计了一种飞轮用永磁无刷直流电机.根据电机磁路,推导了磁钢尺寸与最大磁能积的关系；采用有限元法分析了磁路参数对飞轮性能的影响；针对飞轮电机大气隙、大径长比的结构特点,给出了气隙磁通密度的计算方法；建立了绕组参数与电机额定数据间的关系；仿真分析了电机性能.通过对一台最高转速为6 000 r/min、角动量为5 Nms的飞轮电机样机进行实验验证,得出最大设计误差为65%,证明了设计方法的正确性.
关键词：
姿控飞轮,
永磁无刷直流电机,
磁能积,
有限元,
磁通密度
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