Dual active bridge converter with large soft-switching range

Author

Vangen, Knut ; Melaa, Terje ; Dnanes, Ålf Kare ; Kristiansen, Per Even

Author_Institution

ABB Corporate Res., Norway

fYear

1993

fDate

13-16 Sep 1993

Firstpage

328

Abstract

A direct DC low frequency AC dual-active-bridge (DAB) converter with zero voltage switching, resonant transition (ZVS-RT) has been tested at 75 kHz at power levels up to 23 kW. It has dual angle, constant frequency phase shift control, and is soft-switched with high efficiency in a large part of the output V-I plane. There is an optimum set of control angles for each operating point. Efficiency up to 93.3% has been measured at DC output, and 89% at AC output. IGBT dynamic saturation at turn-on from zero current into a positive di/dt is shown to be an important loss factor, together with the diode forward recovery voltage spike. Experiments show the influence of package stray inductance on voltage waveforms and efficiency. The resonant transition is disturbed by semiconductor and stray component effects

Keywords

bridge circuits; circuit resonance; insulated gate bipolar transistors; optimal control; phase shifters; power convertors; power transistors; switching circuits; voltage control; 23 kW; 75 kHz; 89 percent; 93.3 percent; DC/AC dual active bridge power convertor; IGBT; ZVS; control angles; diode forward recovery voltage spike; dynamic saturation; loss factor; operating point; optimal control; phase shift; resonant transition; soft switching; stray inductance; turn-on; voltage control; waveforms; zero voltage switching;

fLanguage

English

Publisher

iet

Conference_Titel

Power Electronics and Applications, 1993., Fifth European Conference on

Conference_Location

Brighton

Type

conf

Filename

264764