Research on low input current ripple two-stage converter for low frequency pulsed-power applications

Abstract

In this study, a two-stage cascaded pulsed power converter based on the proposed optimised control scheme has been presented. In order to eliminate the low-frequency input current ripple, the front-stage converter only needs to provide average power and the second-stage converter provides pulsed power. Meanwhile, the isolation of energy transfer mode combines with the proposed optimised control method based on the input current AC signal feedback control guarantee smooth input power with low repeat frequency pulsed load. To demonstrated the effectiveness of the proposed low-frequency input current ripple cancellation technique, a 1 kW peak pulsed power prototype is built and tested. The experimental results verify the validity and reliability of the two-stage isolated pulsed power converter with proposed optimised control method, and the proposed methods and concepts in this study can also be applied to all kinds of pulsed power applications.