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Improvement on Transient Performance of Cooperative Triple-Phase-Shift Control for Dual Active Bridge DC-DC Converter

Cooperative triple-phase-shift (CTPS) control for dual active bridge DC-DC converter has the advantages of eliminating the dual-DC sides flow back currents, minimizing the root mean square value of the inductor current and greatly improves the current characteristics. In this paper, the effect of the transient actions on CTPS is originally analyzed and the corresponding solution based on is proposed. When the sudden change of the three phase shifts occurs, the switching moments of the control signals of the power switches are recalculated considering the old and new values of the three phase shifts together to eliminate the transient DC bias currents and flow back currents. Detailed experimental results verify the theoretical analysis and proposed solutions.