A Loss-Compensated Control Scheme for SiC-Based Dual Active Bridge Converter

Abstract

In this paper, a control strategy improvement for controlling Dual Active Bridge (DAB) converters with Phase Control Modulation (PCM) is proposed. The analysis of PCM currently available in literature neglects the effects of the components' resistive losses, as well as the resistance of the transformer windings, for determining the required phase shift ϕ between the primary side and secondary side bridges. The analytical method of the PCM is extended with simple algebraic relationships for the required phase shift ϕ for the needed output power. The effects of including the resistive losses from the components is presented not only for the required control angle, but also for the zero voltage switching region of the semiconductors. A study case of a Dual-Active-Bridge converter in a 22 kW on-board charger application is given to demonstrate the procedure of the method.