Switching Control Strategy to Minimize Dual Active Bridge Converter Losses

• Published in: IEEE transactions on power electronics Vol. 24; no. 7; pp. 1826 - 1838
• Main Authors: Oggier, G.G., Garcia, G.O., Oliva, A.R.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-07-2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Active control; Applied sciences; Bidirectional dc-dc converter; Bridge circuits; Circuits; Converters; Convertors; DC generators; dc-dc power conversion; Electric currents; Electric potential; Electric power; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Exact sciences and technology; Experiments; Load flow; losses; Mathematical analysis; Operation. Load control. Reliability; Power networks and lines; Pulse duration modulation; Pulse generation; Pulse transformers; Pulse width modulation; Regulation and control; soft switching; Space vector pulse width modulation; Strategy; Switching; switching control; Switching converters; Topology; Transformers; Transformers and inductors; Voltage; Voltage control; Performance evaluation; Electric transformer; dc-dc power conversion; Bidirectional link; Prototype; losses; Implementation; Load flow; Bidirectional dc-dc converter; Switching conditions; Power flow; Energy conversion; Power losses; switching control; Multilevel system; Bridge convertor; Soft switching; Phase shift; Control system; Direct current convertor; Experimental study; Algorithm; DC-DC power convertors; Feasibility; Pulse duration modulation
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2009.2020902

A switching control strategy to control the power flow and minimize the total power losses of the dual active bridge converter topology is proposed in this paper. The control strategy consists of driving the bridge with the largest DC voltage to generate a three-level pulsewidth-modulated (PWM) voltage waveform. This PWM is ruled by two manipulated variables: the phase shift between the primary and secondary transformer voltages and the modulation index. These variables are calculated using an algorithm that is deduced on the basis of particular calculation and analysis of converter losses, which are also presented in this paper. An experimental prototype was implemented to validate the theoretical analysis and feasibility of the proposal. The experimental results revealed that the overall efficiency of this converter can be improved up to 10% using the control strategy instead of the conventional one.