The latest design architectures, especially in automotive power electronic systems, are critical in the success of any new hybrid electric vehicle (HEV) or electric vehicle (EV). A high-voltage vehicle power network is necessary with voltages of 60 V and higher, along with a traditional 14-V power network.
High-voltage vehicle power network architectures contain an electrical energy-storage system and a traction drive inverter. Some HEV and EV system architectures also may contain high-voltage power electronic systems using dc-dc converters to power a low-voltage network. Examples include electrical air-conditioning compressors, cooling water pumps, oil pumps, traction bus voltage stabilization, and ac-dc converters for unidirectional or bidirectional interfaces to vehicle grids.