多电飞机开关磁阻电机转矩控制系统研究

A Study of Torque Control System of Switched Reluctance Motor for More-Electric Aircraft

针对传统控制方式下开关磁阻电机(SRM)转矩脉动大的问题,采用了基于瞬时转矩控制的SRM转矩控制系统,通过模糊控制策略与重叠换相法来抑制转矩脉动。经模糊自适应PID进行速度控制并产生参考转矩,再由转矩分配函数给出相应的各相瞬时转矩,可求得各相瞬时电流,通过瞬时电流跟踪控制使电机电流跟踪,完成电机的转矩控制。并根据多电飞机(MEA)高压直流(HVDC)电源系统的发展需求,建立了270VDC、60KW的SRM转矩控制系统仿真模型,仿真结果表明,相对于传统的平均转矩控制方式,控制系统可以有效减小转矩脉动。

The torque ripple of the Switched Reluctance Motor （SRM） was much severe under the traditional control methods, to solve this problem, this paper adopted a torque control system based on instantaneous torque control by using the fuzzy control strategy and overlapping commutation. After the reference torque was given from the fuzzy self - adaptive PID control of speed error, the instantaneous torque of each phase was produced by the torque distribution function（ TDF）, then the instantaneous current of each phase was obtained. The approach of instantaneous current tracing control was implemented in this system to adjust the current for controlling the torque. According to the requirement of the HVDC system for the More - Electric Aircraft （ MEA ）, a torque control system model of a 270VDC ,60kW SRM was established, and the simulation results showed that this method could reduce SRM＇ s torque ripple effectively compared with the traditional means.