A novel grid-connected multi-input boost converter for HEVs: Design and implementation

In plug-in hybrid electric vehicles, multi-input boost converters became widely used to enhance the stability and reliability. However, conventional boost converters have difficulty of low efficiency and the implementation size problem as well as the cost. To improve these drawbacks, this paper proposes a novel modularized multi-input bridgeless boost converter that interfaces the hybrid AC/DC power sources to the vehicle power train. In this study, the multi-input structure with bridgeless high frequency boost converter is proposed in order to reduce the size of the passive components with high efficiency compared to other topologies. The proposed topology is compared with bridge boost converter and Bridgeless power factor correction converter topologies in order to examine its performances. The converter topologies and their controller are designed and investigated. Furthermore, the proposed topology is experimentally validated with results obtained from 60-kW prototype that has been built and tested in our laboratory based on TMS320F28335 DSP. The results have demonstrated that the proposed topology is more efficient than other converter topologies to achieve great size reduction with high performance.