Moduler Open System Approach to High Voltage Power Architectures Enabled by the Universal High Voltage Converter

Increased power density is essential to improving the capabilities of ground vehicles. High voltage systems allow for more efficient power generation and distribution than legacy low voltage systems and can accomplish this through a variety of methods, including HV generation, HV batteries, and HV conversion from the already present LV batteries. GVSC has defined three high voltage architectures that use a Modular Open System Approach (MOSA) to encompass varying levels of power demand: High Power, Mild Hybrid, and Full Hybrid. The Universal High Voltage Converter (UHVC) is a critical enabling technology for the Hybrid architectures, allowing for bidirectional power conversion from 600 VDC to a variable 270-600 VDC bus. The first UHVC was received and tested in FY24 for compliance with its performance specification. The safety interlocks, efficiency, step-load performance, and operational control priorities were tested, and their results are presented in this paper.