介绍了一种新型结构的有限转角无刷直流力矩电动机，定、转子采用扇形结构，可有效降低电机的体积、重量。

A new structure design of limited Angle motor was introduced in this paper, which was validated by Ansoft software.

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卫星姿控飞轮是由三相轮流换向无刷直流电动机驱动的，采用力矩控制(电流反馈)模式。

Satellite attitude control flywheel is driven by three-phase alternate commutating brushless DC motor, schema of which is torque control model (current feedback).

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采用有限元法计算分析了定子偏心与转子偏心对无刷直流电动机的气隙磁场、定位力矩及单向磁拉力的影响。

The effects of stator and rotor eccentricity on the magnetic field distributions, cogging torque and unbalanced force were calculated in this paper by using finite element method (FEM).

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