Study of the Effect of Destabilizing Factors on the Parameters of the Power Elements of Converters

Abstract

A study of the effects of the main ten destabilizing factors on the parameters of the converter’s power elements has been conducted. Converters operating in the switching mode create voltage and current ripples in the supply network and at the input of connected consumers. To reduce the magnitude of ripples, it is proposed to use circuits with an incomplete range of output-voltage adjustment, which form a constant unadjusted and a pulsed adjusted component in the form of consumed current and voltage at the input of the output filter. In such circuits, the unadjusted component provides the transmission of electricity to consumers without adjusting and filtering its parameters, and reducing the amplitude of the adjusted pulse component makes it possible to reduce the inductance of the chokes and the capacitance of the capacitors of the input and output filters and, therefore, to improve their weight and size. The dependence of the ripple ranges of the current of the chokes and the voltage across the filter capacitors on the magnitude of the relative pulse-voltage component has been established. This study was performed on a converter model created using the MATLAB Simulink program. The research results were obtained for circuits with incomplete and full ranges of output-voltage adjustment, analysis of which proved the prospects of the proposed scheme.