基于不连续控制的含寄生参数开关变换器的指数稳定性分析  

Exponential Stability Analysis of Switching Converter with Parasitic Parameters Based on Discontinuous Control

作　　者：曾海威 杨汝 胡维[3] 余连德[1] 杨红 ZENG Haiwei;YANG Ru;HU Wei;YU Liande;YANG Hong(School of Physics and Electronic Engineering,Guangzhou University,Guangzhou 510006,China;School of Mechanical and Electrical Engineering,Guangzhou University,Guangzhou 510006,China;Lab Center,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学物理与电子工程学院,广州510006 [2]广州大学机械与电气工程学院,广州510006 [3]广州大学实验中心,广州510006

出　　处：《电源学报》2022年第2期45-56,共12页Journal of Power Supply

基　　金：广东省自然科学基金团队资助项目(1714060000016);广东省科技计划资助项目(2017A010101040)。

摘　　要：提出一种基于不连续控制的开关变换器指数稳定性分析方法,该方法不需对开关变换器的模型做近似处理就可判定开关变换器的指数稳定性。加入开关变换器的寄生参数后对其进行稳定性分析,使结果更加接近于系统实际工作情况,可以提高稳定性分析的可靠性。在判定开关变换器的指数稳定性基础上设计了一种电流连续导通模式CCM(continuous conduction mode)Buck变换器的不连续控制器。该控制器采用不连续反馈控制方式,该控制方法相比连续反馈控制方法更符合变换器的切换不连续特性。数值仿真表明了该控制方法的优越性能,电路实验验证了该控制方法的有效性。In this paper,an exponential stability analysis method for switching converter based on discontinuous control is presented,which can determine the exponential stability of the switching converter without approximating its model.After the addition of its parasitic parameters,the stability analysis is performed,which makes the result closer to the actual situation of the system.As a result,the reliability of stability analysis is improved.On the basis of judging the exponential stability of the switching converter,a discontinuous controller for a Buck converter in continuous conduction mode(CCM)is designed.This controller adopts a discontinuous feedback control method,which is more consistent with the switching discontinuity of the converter compared with the continuous feedback control method.Simulation results show the superiority of the control method,and the result of circuit experiment proves its effectiveness.

关 键 词：不连续控制 指数稳定性 寄生参数 开关变换器 BUCK变换器 

分 类 号：TN86[电子电信—信息与通信工程]