Patent ID: 8587975

Claim:
A system comprising: a Dual Active Bridge (DAB) converter comprising a transformer, a first H-bridge that is connected to a primary winding of the transformer and controlled via first control signals, and a second H-bridge that is connected to a secondary winding of the transformer and controlled via second control signals; and a controller adapted to provide the first and second control signals based on an input-to-output voltage ratio and load of the DAB converter such that, in addition to phase shift control: Pulse Width Modulation (PWM) control is simultaneously applied to both the first H-bridge and the second H-bridge when the DAB converter operates at low power as determined based on the input-to-output voltage ratio and load of the DAB converter; and PWM control is applied to only one of the first H-bridge or the second H-bridge when the DAB converter operates above low power as determined based on the input-to-output voltage ratio.