Modular PET, two-phase air-cooled converter cell design and performance evaluation with 1.7kV IGBTs for MV applications

This paper explores the optimization and design of a medium voltage, modular power electronics transformer based on industrial 1.7 kV IGBTs. The design of the medium frequency transformer is outlined. The thermal management using a two-phase, air-cooled thermosyphon is described. The overall performance of one cell is detailed from measurements on a full-scale laboratory demonstrator. From the data, the impact of converter variables on power throughput and efficiency is illustrated. In addition, the waveforms are analyzed in terms of converter parasitics and circuit configuration.