航空EMA用永磁无刷电动机复合驱动控制策略研究

摘要

As two main driven method of PM motor, sinusoidal driven and trapezoidal driven have formed their own control ideology. However, the troque ripple by trapezoidal driven is comparatively large and the moment by sinusoidal driven is small, both them can not fulfill the demand of high-power actuators in aviga-tion. To resolve this problem, this paper took up with a unique compound driven system which combined the predominance of the two driven method. The controlling object is the permanent magnet brushless motor, which is the main executing part of EMA in avigation. In this system, the motor starts under sinusoidal driven and switches to trapezoidal driven in high speed. The emulation results shows that this method can effectively reduce torque ripple in low-speed and enhance efficiency of the motor in high-speed because of the large moment of trapezoidal driven, the method provides a consultable new ideology for the hign precision and high efficiency control of PM motor used in avigation.%正弦波驱动与方波驱动是永磁无刷电动机的两种主要驱动方式,各自已经形成独立的控制思想体系,但是方波驱动方式下存在低速转矩脉动较大的问题,而在正弦波驱动方式下出力又较小,不能满足航空用大功率作动系统的需求.针对这一问题,结合两种驱动方式各自的优点,以航空机电作动器(EMA)的主要执行部件永磁无刷电动机为控制对象,致力于研究并设计一种独特的复合驱动系统,电机以正弦波驱动方式起动,并在高速时切换至方波驱动方式.仿真结果证明:该方法能够有效减小低速转矩脉动,并且由于高速时采用了方波驱动方式出力更大,能够有效提高永磁无刷电机的效率,为航空EMA用永磁无刷电动机的高精度、高效率控制提供了一种可供参考的新思路.