Power unidirectional transmission of multi-winding common iron core integrated high-frequency isolation converter

Abstract

Aiming at high efficiency and high power density in three phase isolated medium/high voltage converters，a three-phase common-core magnetic integrated high-frequency isolated power unidirectional transmission of DC-DC converter topology is discussed.The converter is composed with the common core magnetic integrated transformer，the full control H bridge inverter and the diode rectifier bridge.It can realize the stable balance of the output voltage when the load is unbalanced.This paper analyzes the topology of the converter，and then analyzes the power characteristics of the topology，and obtains a simpler control strategy.The correctness of the proposed topology and control strategy is verified by simulation and experiment.

Keywords

• three-phase high frequency isolated medium/high voltage converter
• voltage balance
• power unidirectional transmission
• multi-winding common iron core integrated high-frequency transformer