Research And Design On The Method Of Optimal Time Domin Control Of Digital Switched Mode Power Supply

In recent years, with the switch converter the increasing performance requirements, flexiblemethods, precise control of digital converter gained more and more attention and research. For highorder nonlinear DC-DC converter system, based on the small signal model of the traditional designmethod can’t work in the whole range to get good response characteristics, in the face of thedynamic process of large signal excitation system’s performance is often poor. In order to improvethe dynamic response of the converter system ability, the paper studied the implementation of a newnonlinear control method in digital control circuits.The main purpose of this thesis Paper main job is to study an optimal time domain dynamicresponse of control method, and based on the algorithm design of digital converter. Paper firstanalyzes the basic principle and structure of the synchronous rectification Buck converter, on thebasis of the filter element on the different effects of converter system steady state and dynamic;Secondly, the paper based on optimal control theory of the converter system are analyzed, thedynamic process of draw inductor current and output voltage quadrant analysis method in dynamicresponse under the fastest path curve; Then the thesis track prediction technology was used toovercome the loop delay, and on this basis, using digital method to achieve the optimal time domaindynamic response of the controller design;This thesis designs a new control algorithm based on the idea of the optimal control of designthe new control method, and through the simulation analysis and physical test on the performanceof the algorithm in the digital converter is verified, the results show that the algorithm has fastdynamic response speed and small overshoot, for the realization of the optimal dynamic responsetime domain provides a feasible ideas and methods. This paper puts forward that the quadrantanalysis and trajectory prediction technology can be used as important reference for future similarresearch.