感应电机矢量控制电流环控制器的设计

Design of Asynchronous Motor Current-loop Controller

本文在分析感应电机矢量控制电流环工作原理的基础上,对电流环各组成部分进行数学建模。设计了一款感应电机电流环控制器,采用矢量解耦与反电势补偿加PI调节器的方法实现。消除了反电动势及直流母线电压的影响,实现了耦合量的完全解耦。通过简化电流闭环控制模型,得到电流环PI参数的简明计算公式。对比分析了简化前后电流环零极点分布及单位阶跃响应,验证了参数设计的合理性。电流环传递函数稳定性分析结果以及试验结果表明此电流环控制器能够使电流环响应快速、稳定。

Based on the analysis of working principle of the asynchronous motor current loop, mathematical models were established. A current-loop controller of the permanent magnet synchronous motor was designed which realized by using vector decoupling, BEMF compensation and PI regulator, where the BEMF represents an abbreviation of back electromotive force. The controller eliminated the influence of BEMF and DC bus voltage, and it decoupled the coupling quantity. By simplifying the current closed loop control model, the formula current loop PI parameters were got. Zero-pole distribution and unit step response of current loop were analyzed, verified the rationality of the parameters. Function stability analysis results and the experiment results show that the current loop controller can make current loop fast response and stable.