Optimal Design of the Series Resonant Charging Power Supply

Abstract

This article presents an optimized solution for the series resonant power supply. A master–slave resonant charging structure is selected to improve the charging speed, low-voltage precision, and uncontrollable output voltage. Voltage and current sampling circuits based on the linear optocoupler are employed to obtain arbitrary voltage and improve stability and reliability. Parasitic capacitance is optimized by the transformer winding structure. The parasitic capacitance calculation method is proposed based on the current waveform. A self-triggered high-voltage pulse generator (HVPG) based on avalanche transistors is used to verify the feasibility of this research. From the results, it can generate an amplitude of about 1 kV and a repetitive frequency of 1–5.7-kHz voltage on a resistor load.