Rusu A. Models, methods of analysis and research of electrical and energy processes in the pulsed DC-DC converters with PWM-regulation

The object – electrical and energy processes in the pulsed DC-DC converters with PWM-regulation. The subject – the research mathematical models and methods of electrical and energy processes in the pulsed DC-DC converters with PWM-regulation. Research methods: the methods of the theory of electrical circuits, the method of the analysis of electrical processes in the pulsed DC-DC converters with PWM-regulation were developed based on use as the basic parameters – the parameters of current of inductor, the methods of mathematical modeling of electrical processes DC-DC converters, the methods of digital modeling, the piecewise-chairsided method. Theoretical and practical results: the thesis is devoted to the development of mathematical models and improvement of methods of analysis and research of electrical and energy characteristics of pulsed DC-DC converters with PWM control for identifying the specific characteristics of converters with autotransformer and transformer switching savings inductor. The methods further of analysis and research of electrical and energy characteristics of converters were developed based on use as the basic parameters – the parameters of current of inductor. For the first time the mathematical models have been made (for the quasi-stationary and transient regimes) to calculate the electrical and energy characteristics, generalizations about the eight most common converter circuits, continuous and discontinuous modes of operation, transformerless, autotransformer and transformer connection cumulative inductor. Based on the models and improved methods developed methods of calculation and research of electrical and energy characteristics of the converters the necessary software was created with which identified specific characteristics of DC-DC converters, step-down type with autotransformer and transformer connection inductor.