The latest military vehicles have been developed with on-board high voltage (600Vdc) power generation systems. The generator controller is an essential part of such a power generation system. It interfaces and converts generator 3-phase ac voltages into vehicle dc bus voltage and is the primary component responsible for vehicle bus stability. Compliance of the controller’s output dc voltage with MIL-PRF-GCS600A(ARMY) is a prerequisite for stability. This paper presents the design, and test results of a 75kW continuous operation power converter achieving a volumetric power density above 7kW/liter at an 85oC coolant temperature. Details regarding power quality and thermal management are discussed. Performance results will be provided, including assessment of the voltage regulation requirements as part of MIL-PRF-GCS600A, efficiency (97%), and temperature results.