摘要
控制延时和系统参数变化是无差拍控制的主要缺点,会导致系统振荡以至不稳定。为得到稳定性与控制延时和系统参数变化的对应关系,提出一种基于w′变换的稳定性判断新方法。首先建立考虑延时和系统参数变化的新电流环传递函数,然后通过w′变换将z域的新传递函数变换到w′域。利用低频段w′域与s域的相似性,借助波特图和Routh判据,得出了系统稳定性与延时及电感参数变化的确切对应关系,并给出了解决稳定性问题的具体方法。样机实验验证了理论分析的正确性。
The major disadvantages of the deadbeat current control are control time delay and the variation of system parameters.It could induce system oscillation and even stability may be lost.In order to get the relation of stability with control time delay and the variation of system parameters, a new stability criterion method based on w＇ transfor- mation is proposed.A new current loop transfer function including delay effect and the variation of system parameters is acquired, and then the transfer function in w＇ domain based on the new transfer function in z domain is obtained by w＇ transformation.The exact relation of stability with control time delay and the inductor parameters variation is ac- quired according to the Bode diagram and Routh criterion, and the concrete method which can deal with stability problem in deadbeat current control is given.The prototype experiment prove the correctness of the proposed scheme.
出处
《电力电子技术》
CSCD
北大核心
2013年第8期28-31,共4页
Power Electronics
关键词
整流器
无差拍
稳定性
交流电子负载
rectifier
deadbeat
stability
alternating current electronic load
