Analytical and Normalized Equations to Implement the Optimized Triple Phase-Shift Modulation Strategy for DAB Converters

MACIÁ CAPÓ-LLITERAS; GERMÁN G. OGGIER; EDUARD BULLICH-MASSAGUÉ; DANIEL HEREDERO-PERIS; DANIEL MONTESINOS-MIRACLE

IEEE Journal of Emerging and Selected Topics in Power Electronics

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Año: 2023 vol. 11 p. 3535 - 3546

2168-6785

A fully normalized algorithm to implement the optimal triple-phase shift (TPS) modulation strategy of the dual active bridge converter is proposed in this paper. The algorithm evaluates three simple expressions that fit the optimal solutions obtained in recent works, which allows the algorithm to beimplemented in real-time and valid for the whole operating range. As a result, the converter operates under zero voltage switching conditions and minimizes conduction losses. In addition, the algorithm considers the minimum current required to guarantee zero voltage switching condition that faces undesired deadband of switching devices effect. The proposal achieves soft transition between any operation region and fast closed-loop response with no stability concern, presenting robustness under leakage inductance deviation. Finally, the algorithm presented in this paper is verified with a 4 kW experimental prototype. Experimental results show that the algorithm proposed can be evaluated with less than 2.8 μs and allows soft transition between any operation region to be achieved. Besides, fast closed-loopchanges of 750 μs through all the operating ranges, keeping minimum RMS current under zero voltage switching, are shown.