With more and more power electronics-based resources and loads being integrated into the grid, there is a strong desire to standardize the grid power electronics building block to further reduce the cost. This paper presents the design and implementation of a high-power density, low-cost air-cooled 75kVA SiC Intelligent Power Stage (IPS) as a possible solution for this purpose. The six-phase leg IPS is developed using discrete SiC devices, hence achieving very high power density and low cost. An intelligent gate driver is designed with integrated overcurrent protection, on-state voltage measurement, and temperature sensing functions to enable versatile and intelligent functionalities. The IPS has a built-in communication interface to communicate with other controllers to form much larger and multiple converter systems and microgrids. The developed IPS is tested at 75kW in a two-stage DC-AC mode. Measured full load two-stage power stage efficiency is 98.1% at 75kW.
