Single-Stage Reconfigurable DC/DC Converter for Wide Input Voltage Range Operation in (H)EVs

Abstract

A single-stage reconfigurable isolated DC/DC converter (1) is proposed for use in hybrid and electric vehicles (EVs and HEVs) to supply a 12 V automotive network from the HV battery. The purpose of the proposed topology is to increase the converter efficiency at the higher voltage range of the HV battery. A zero voltage transition (ZVT) phase shift (PS) full bridge (FB) converter is the basis for the reconfigurable topology, which is adapted to operate as a push-pull converter. The ZVT PS FB configuration covers the upper range of input voltages, in which an increased converter efficiency has more effect. It is furthermore reconfigured into the less efficient, hard-switching, push-pull configuration to cover the lower, less significant voltage range. The reconfiguration voltage is chosen to maximize the average efficiency according to the histogram of the HV-battery voltage during a typical driving cycle. Experimental validation of the proposed converter and its efficiency improvement are also presented.

Optimization Parameter Design of SEPIC-Cuk Converter

“…The third step to calculate the link capacitors (C1 and C2), Eqn. (4). The role of the link capacitor is to transfer the energy to the output side.…”

Modified single‐switch bridgeless PFC SEPIC structure by eliminating circulating current and power quality improvement

“…Portable electronic equipment has advanced from power converter and has the advantages of high efficiency, small in size, and possesses a wide input and output voltage ranges [1][2][3]. On the other hand, the conventional power converter is not able to operate in a wide operation range and at the same time maintaining a high efficiency; especially, when the stepped-up and stepped-down voltage conversion need to be achieved [2,4,5].…”

Optimization of PFC SEPIC Converter Parameters Design for Minimization of THD and Voltage Ripple

“…In recent years, portable electronic equipment has advanced from a power converter and has the advantages of high efficiency, small in size and possess a wide input and output voltage ranges [1]- [3]. On the other hand, the conventional power converter is not able to operate a wide operation range and at the same time maintaining high efficiency; especially when the step up and step down voltage conversion need to be achieved [2], [4], [5].…”