A novel ZCS interleaved bidirectional buck-boost DC-DC converter for energy storage applications

A New Continuous Input Current Nonisolated Bidirectional Interleaved Buck-Boost DC-DC Converter

“…Also, for D > 0.5, the input current ripple of the converter [26] gets higher than the presented converter and the presented converter acts better than others. In other words, as shown in Figure 15, the curve of the presented converter is placed lower than others; this illustrates that the presented converter has low input current ripple in comparison with [19][20][21][22][23] and CIBBC. e input current ripple ratio of the converter [27] in comparison with the proposed converter is less; however, the voltage conversion ratio of this converter in comparison with the presented converter and the conventional one for buck operation mode is not improved.…”

“…According to this figure, converter [21] has the highest input current ripple. For D < 0.5, the input current ripple of the proposed converter is lower than the converters [19][20][21][22][23] and CIBBC. Also, for D > 0.5, the input current ripple of the converter [26] gets higher than the presented converter and the presented converter acts better than others.…”

“…According to (23), it concluded that the voltage across switches in the proposed converter and the conventional buck-boost converter are equal.…”

“…Since the number of components in the current path in structures [21][22][23] is more than the proposed converter and because of the high value of their RMS input current, the efficiency of the proposed converter is higher than that of the structures [21][22][23] and others except [19]. In the converter presented in [19], an additional inductor is used for soft switching, which reduces the switching losses and increases the converter's efficiency.…”

“…Still, the input current is discontinuous, and the input current ripple ratio is close to the conventional one. In [23], a ZCS interleaved bidirectional buck-boost DC-DC converter is presented, appropriate for energy storage applications. Although the conventional interleaved converter has been improved with the auxiliary resonant cells, the input current ripple is still not improved.…”