Search

In this article a synthesis, comparative analyses, and architecture classification of the family of bidirectional boost/buck power converters is done taking into account the low voltage dc bus as input and high voltage as output. The classification can be input/output as series or parallel, where the series characteristic is the voltage division between the modules, while the parallel characteristic presents the current division feature. Also, in this article, an architecture is shown, which presents the characteristics of both, the parallel and series approach, at the same time. The theoretical analyses about voltage and current stresses, as well as voltage gain is carried out and validated through experimental results for nine prototypes that were built in the laboratory. The efficiency curves was extracted from 500 W to 1 kW.

A new nonisolated bidirectional dc–dc converter with low voltage and current stresses across the semiconductor devices is presented in this article. The proposed converter is a combination of a dual-stacked bidirectional boost converter. The converter presents different operations modes, such as: synchronous and asynchronous. These modes can reduce the current ripple of the voltage source. Besides that, in this article, the modeling and control of the proposed converter are done. To validate the theoretical evaluations of the proposed converter, a 1-kW, 144-V/400-V prototype was built to verify its performance where the peak efficiency is 96.33% and 96.87% for step-up and step-down modes, respectively.

In this brief, comparison of coupled inductors with two and three windings is presented. For this, an implementation of two simple hybrid topologies was carried out, which will be presented with their principle of operation, and performance analysis, e.g., comparison of voltage and current stress. A design guideline is presented to reduce the effect of leakage inductance and winding resistance. Five prototypes each with 250 W, were built in the laboratory to verify the performance of the converters for different values of duty cycle $(D)$ and turns ratio $(N)$ .