Instantaneous current control for the three-phase dual-active bridge DC-DC converter

Abstract

The three-phase dual-active bridge (DAB) is a dc-dc converter, which provides galvanic isolation, inherent soft-switching capability and small filter size. In this work, the dynamic behavior of three-phase DAB is analyzed and a dynamic control strategy is developed. Furthermore, a compensation technique is implemented to compensate unbalanced transformer phase currents. The latter is often caused by asymmetric leakage inductances.