Dead-Time Compensated Instantaneous Current Control for the Three-Phase Dual-Active Bridge DC-DC Converter

Abstract

Galvanically isolated DC-DC converters like the three-phase dual-active bridge (DAB3) are becoming increasingly important for high-power DC applications due to several advantages. IGBT or IGCT devices with low switching frequencies are used in the high-power range. The dead time of these devices is not negligible and already accounts for a considerable part of the switching period. The zero crossing of the current within the dead-time interval causes voltage-time errors applied to the stray inductance of the transformers. Especially during load-steps, this affects the instantaneous current control (ICC) method, reducing its effectiveness. Therefore, this paper proposes and experimentally verifies a methodology for compensating the dead-time effects during transients, thereby achieving a dead-time compensated ICC.

Authors 2

1. Benedict J. Mortimer Aachen Institute for Power Generation and Storage Systems (PGS) E.ON Energy Research Center

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Power Generation and Storage Systems E.ON Energy Research Center,Aachen,Germany

2. Rik W. De Doncker Aachen Institute for Power Generation and Storage Systems (PGS) E.ON Energy Research Center

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Power Generation and Storage Systems E.ON Energy Research Center,Aachen,Germany