双管正激变换器的输入输出线性化控制研究  

Input-output linearization control research of two-transistor forward converter

作　　者：马培松 李刚[1] 许皓 

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2017年第6期2059-2066,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51266001)

摘　　要：针对传统双管正激变换器采用电压型PI控制策略时其动态响应速度较慢的问题,基于输入输出线性化方法,采用了一种新颖的非线性控制算法来改善其动态响应速度。该算法是在变换器的状态空间模型基础上建立其单输入单输出仿射非线性系统模型,采用输入输出线性化方法,通过适当的非线性坐标变换与状态反馈来推导出新的控制归律,由此得出电感电流与输出电容电压的解耦控制算法。用PSIM软件对得到的控制算法进行仿真,并通过搭建一台功率为250 W的实验装置对控制效果进行研究。结果表明,基于输入输出线性化控制的双管正激变换器具有更快的动态响应速度与较强的鲁棒性。Aiming at the problems such as the slow dynamic response speed using PI control method for the traditional two-transistor forward converter. A novel non-linear control law based on inputoutput linearization method is adopted in the two-transistor forward converter to improve the dynamic response speed. The essential idea for the method is to establish a single input and single output affined nonlinear system model based on the state space model of the converter. Then by using input and output linearization method to derive the new control law by appropriate nonlinear coordinate transformation and state feedback. Thus the decoupling control algorithm of the inductor current and the output capacitor voltage is obtained. The control algorithm is simulated on PSIM software and verified by setting up a 250 W device. The results suggest that the two-transistor forward converter have the faster dynamic response speed and stronger robustness based on the input-output linearization method.

关 键 词：双管正激变换器 非线性控制 输入输出线性化 解耦控制 鲁棒性 

分 类 号：TM46[电气工程—电器]