Analysis of Closed Loop Operation of an Isolated Bidirectional DAB DC-DC Converter with LC Coupling

This paper applies a dual active bridge converter with a closed loop that regulates the power transfer between the DC sides. The proposed control loop also performs a duty cycle adjustment in the AC side voltages in order to obtain minimal AC rms current in the converter for cases where the DC voltages ratio differs from the transformer ratio. The proposed control method is validated by simulation and experimental results.