A novel dual active bridge topology with a tuned CLC network

Abstract

This paper proposes a novel resonant DAB converter, which uses a tuned capacitor-inductor-capacitor (CLC) network. In comparison to conventional DABs, the proposed topology significantly reduces the bridge currents, lowering both conduction and switching losses and improving power factors associated with the bridges. A mathematical model, which predicts the behavior of the proposed system, is presented to show that both the magnitude and direction of the power flow can be controlled through either relative phase angle or pulse width modulation of voltages produced by the bridges. Viability of the proposed concept is verified through simulation. Experimental results of a 1 kW prototype converter, which has an efficiency of 95% at rated power, are also presented with discussions to demonstrate the improved performance of the CLC DAB topology.