Power distribution system for generating regulated DC output voltages using a dual active bridge converter driven from an unregulated DC source

摘要

A power distribution system including a dual active bridge converter (DABC) distributes a regulated high-frequency, edge-resonant, square wave ac output voltage from an unregulated dc voltage source. The DABC- includes a primary-side half-bridge connection of switching devices and a secondary-side half-bridge connection of switching devices which are coupled by an intermediate high-frequency transformer. An ac distribution bus is connected to the regulated secondary side of the transformer. The primary-side and secondary-side connections of switching devices are phase-shifted in a manner to provide a regulated high- frequency square- wave voltage on the ac distribution bus, which is distributed via a low- impedance distribution bus to a plurality of simple point-of-load converters. Alternatively, a plurality of DABC's is configured in a high- frequency ac power distribution system such that a primary-side half- bridge of switching devices converts an unregulated dc voltage source to an unregulated high-frequency, square wave ac voltage which is distributed to a plurality of point-of-load converters. Each point-of- load converter has a high-frequency transformer and secondary- side switching devices, such that each point-of-load converter forms a DABC pair with the primary-side half-bridge.