交流电机离散时间电流调节器的设计  

Discrete-time Current Regulator Design for AC Machine

作　　者：杨立永[1] 田安民[1] 

机构地区：[1]北方工业大学电力电子与电气传动工程中心,北京100041

出　　处：《电力电子技术》2011年第5期62-64,共3页Power Electronics

基　　金：北京市教委资助项目(KM200710009001)~~

摘　　要：分析了运行在较高基频与采样频率的比值下异步电机的离散时间电流调节器的特点,该情况普遍应用在高速列车驱动和大型牵引驱动上。若电流调节器的设计不能很好地满足控制系统离散特性,在较高的基频与采样频率比值下,系统会发生严重的振荡或者不稳定响应。通过一个含SVPWM延迟的离散时域交流电机模型,设计离散时域复矢量电流调节器。仿真和实验结果证明该调节器具有非常优越的稳定性和鲁棒性,充分满足了控制系统的离散特性。The behaviors of discrete-time current regulators for AC machines operating at high ratios of fundamental-to-sampling frequencies are analyzed,a situation common for high speed automotive drives and large traction drives.When the current regulator design does not properly incorporate the effects of the discrete nature of the controller,the highly oscillatory,or unstable response can occur,at high ratios of fundamental-to-sampling frequencies.As a part of this in-vestigation,a discrete-time domain AC machine model is developed that includes the delays associated with SVPWM.This model is used to design a discrete-time domain version of the complex vector current regulator that demonstrates improved response compared with the other regulators studied.Simulation and the experimental results prove that the complex vector peoformance indice has very superior stability and robustness,fully meets the discrete control system.

关 键 词：调节器 交流电机 数字延迟 

分 类 号：TP214[自动化与计算机技术—检测技术与自动化装置]