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Zero Voltage Switching AC-DC Converter Based on Zero State Modulation (ZSM)

by Rajendra Prasad Kandula, Jonathan J Harter, Misael Francisco Martinez Montejano, Christian L Boone
Publication Type
Conference Paper
Book Title
2023 IEEE Energy Conversion Congress and Exposition (ECCE)
Publication Date
Page Numbers
2245 to 2252
Publisher Location
New Jersey, United States of America
Conference Name
IEEE Energy Conversion Congress and Exposition (ECCE)
Conference Location
Nashville, Tennessee, United States of America
Conference Sponsor
Conference Date

In this paper, a half-bridge building block that can achieve soft switching across the complete operating range while operating under fixed frequency is proposed. In addition, dead-beat model predictive controls to control the same are also proposed. The proposed converter, referred to as zero-state modulated (ZSM) converter, uses a zero state, enabled by a small auxiliary switch, to achieve soft-switching. The approach allows lower switching loss, controlled dv/dt, small filter inductor, fixed frequency operation allowing interleaving to reduce filter capacitor. A single half-bridge building block can used to realize a ZVS DC-DC converter or multiple of these building blocks can be used to achieve soft switching 1-phase or 3-phase AC-DC converters.