Research on Multi-module Parallel Current Sharing Technology of a Novel Double Full-Bridge Converter for Screen Grid Power Supply

Abstract

To solve the problem with the presence of circulating current and current balance during the improvement of the power and redundancy of screen grid power supply in multi-module parallel system, leading to the lower efficiency and dependability of the system, this paper proposes a novel multi-module parallel Master-slave current sharing control strategy of dual full-bridge converter applied to screen grid power supply, which, based on the analysis of single module, designs the closed-loop control strategy of main module and slave module of multi-module parallel system of screen grid power supply, thereby eliminating the problem of circulating current and current imbalance in multi-module parallel system. In conclusion, the of the proposed method are verified through simulation and analysis and multi-module parallel current sharing experiment.