The Design of isolated high voltage power supply based on LLC-DCT

Abstract

With the development of the accuracy of electronic equipment, it constantly improves the quality requirement of the matching high-voltage power supply. However, Isolated high-voltage power supply is difficult to achieve high quality due to the particularity of sampling. In this paper, the design method of the optimal solution of dead time and shunt branch number of LLC resonant converer based on efficiency optimization is proposed, and the structure of matrix transformer is optimized to reduce eddy current loss and leakage inductance. Finally, the isolated LLC-DCT prototype is made with the power of 20kV/6kW and the frequency of 100kHz, which verifies the rationality and correctness of the design method