DAB Soft start control method for dual active bridge converter and apparatus thereof

摘要

The present invention relates to a method and apparatus for soft start control of a DAB converter, including a first power supply circuit having a first bridge switching device, a second power supply circuit having a second bridge switching device, and a transformer A method of controlling the startup of a formed dual active bridge (DAB) converter includes repeatedly turning on / off the primary bridge switching device and the secondary bridge switching device using open-loop duty control off phase to increase the duty from zero to the reference value and incrementally increase the phase difference between the primary bridge switching device and the secondary bridge switching device using open loop phase shift control and to provide a closed- Transient control is used to converge the actual output voltage to the target voltage.