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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 000r/min、角动量为5Nms的飞轮电机样机进行实验验证,得出最大设计误差为6.5%,证明了设计方法的正确性.
In order to improve the moment of inertia / mass ratio of the attitude control flywheel for small satellites and to reduce the weight of flywheel attitude control system, a flywheel permanent magnet brushless DC motor is designed. According to the motor magnetic circuit, the magnet size and the maximum magnetic energy The relationship between the magnetic parameters and the flywheel performance is analyzed by the finite element method. The calculation method of the air gap flux density is given according to the structure characteristics of the air-gap and the large-diameter ratio of the flywheel motor. The relationship between the motor nominal data and the simulation analysis of the motor performance.Experimental verification of a flywheel motor prototype with a maximum rotation speed of 6 000 r / min and an angular momentum of 5 Nms results in a maximum design error of 6.5%, proving that the design method Correctness