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A 75 kVA Intelligent Power Stages (IPS) Unit Design for Future Grid-interface Application...

Publication Type
Conference Paper
Book Title
Proceedings 2022 IEEE Energy Conversion Congress and Exposition (ECCE)
Publication Date
Page Numbers
1 to 8
Publisher Location
New Jersey, United States of America
Conference Name
2022 IEEE Energy Conversion Congress and Exposition (ECCE)
Conference Location
Detroit, Michigan, United States of America
Conference Sponsor
Conference Date

The demand for grid-interface converter with flexible dc bus is driven by the fast development of energy storage system (ESS), electric vehicle (EV) charging system, and versatile residential load. This paper first proposes a two-stage intelligent power stage (IPS) unit for future grid-interface applications. To achieve zero common-mode (CM) voltage emissions, step-up and step-down voltage gain, a 3-level four-switch buck-boost (3-L FSBB) dc-dc converter is adopted with fully zero voltage switching (ZVS). In one IPS unit, an advanced fiberoptic communication with sub-nanosecond synchronization is developed for different enhanced gate drivers. Moreover, an enhanced gate driver integrated current and voltage sensors is designed for monitoring and diagnostics. To achieve a whole low-profile design, three 12 oz heavy copper planar ac inductors are designed and implemented. Finally, a 75 kVA IPS unit was built to verify both the thermal and electrical design.