Controlling Nonlinear Dynamic Processes of a DC/DC Converter with Pulse-Frequency Modulation

Optimal efficiency dynamic mode regulation in pulse-frequency modulation in voltage converters is considered in this work. Time-delay feedback control is used for solving this problem. The subject relevance is due to the fact that a large number of works have been devoted to using time-delay feedback control in electrical energy conversion systems with pulse-width modulation, and no attention has been paid to the systems with pulse-frequency modulation. Closed-loop automatic control system of buck converter with stabilization desired dynamic modes which increases quality of output voltage is presented. A mathematical description has been developed for calculating electromagnetic processes in the system under consideration in the form of the Poincare mapping. The results of mathematical modeling which shows efficiency of proposed technical solution are presented. Time-delay feedback control system application allowed to exclude undesired dynamic modes under changing system parameters which provided high quality of output voltage.The results presented in the article were obtained for the first time and are important for practice.