摘要
小卫星姿控飞轮用永磁无刷直流电动机具有大的有效气隙、大径长比的特点。采用场路结合方法对姿控飞轮用外转子永磁无刷直流电动机进行电磁设计,给出一种气隙磁通密度的计算方法,最大误差6.5%。分析充磁极数对小卫星姿控飞轮性能影响,电机极数应选择6~10极。提出在满足输出力矩和电磁效率前提下确定电机径长比极值及主要尺寸计算方法,并通过一台最高转速6 000 r/min,角动量5 N.m.s的飞轮样机进行试验验证,姿控飞轮满足性能要求,证明了设计方法的正确性。
The permanent magnet brushless DC motor （BLDCM） used in small satellite attitude control flywheel fea- tures a structure of large equivalent air-gap and large ratio of diameter to length. A field-circuit coupling design method of the outer permanent magnet brushless DC motor in attitude control flywheel application was presented. A method for calcu- lating air-gap flux density was proposed and the maximum error was 6.5%. The influence of pole numbers on the perform- ance of attitude control flywheel was analyzed. For the result, poles should be 6 - 10. In the need of output torque and elec- tromagnetic efficiency, a method for calculating motor main dimensions and radius-length ratio was proposed. The prototype is designed and fabricated to verify the theoretical analysis and satisfy the performance demand of attitude control flywheel with angular moment of 5 N ~ m ~ s at the speed of 6 000 r/min. Therefore,it is proved to be right of the design method on the paper.
出处
《微特电机》
北大核心
2009年第10期4-6,10,共4页
Small & Special Electrical Machines
基金
中科院十一五基金资助项目(61501.02.03.04)
关键词
姿控飞轮
永磁无刷直流电动机
磁通密度
径长比
主要尺寸
attitude control flywheel
permanent magnet brushless DC motor
flux density
radius-length ratio
major dimensions
