基于模糊自适应的开关磁阻电机变磁链研究

Research on the Variable Flux DTC for Switched Reluctance Motor Based on Fuzzy Adaptive

传统直接转矩控制使开关磁阻电机定子电流幅值很大,增加了电机铜耗。通过分析不同磁链对系统性能的影响及磁链与转矩之间的关系,提出了一种变磁链的直接转矩控制改进方法。在Matlab/Simulink中搭建四相开关磁阻电机模糊自适应控制的直接转矩系统仿真模型,仿真结果表明该系统响应速度快,能有效减小定子电流幅值,抑制转矩脉动。针对电机起动过程中电流脉冲大的问题,在改进方法中加入电流控制模块,可明显降低起动时电流的幅值,提高电机的性能。

The current amplitude of state stator for switched reluctance motor is relatively large based on the traditional direct torque control,and the copper consumption of the motor increases.By analyzing the influence of different flux linkage on system performance and the relationship between the flux and the torque,an improved direct torque control method with variable flux is proposed.The direct toque control system of four-phase switched reluctance motor based on fuzzy adaptive system is established in Matlab/Simulink.The results show that the system has fast response speed,can effectively reduce the stator current amplitude and restrain the torque ripple.In order to solve the problem that the stator current pulse is too large during the starting process,adding the current control module in this improved method can obviously reduce the current pulse and improve the performance of the motor.