Design and Validation of a SEPIC-Based Novel Multi-Input DC-DC Converter for Grid-Independent Hybrid Electric Vehicles

Abstract

The multi-input converters play a significant role in developing grid-independent hybrid electric vehicles (GIHEVs). This article describes the design and analysis of a single-ended primary-inductor converter (SEPIC)-based novel multi-input DC-DC converter (MIC) for grid-independent hybrid electric vehicles (GIHEVs) that is powered by a solar photovoltaic (PV) panel and a fuel cell. The average large-signal, small-signal, and steady-state modelings are demonstrated to achieve high-quality design and analysis. The proposed converter promises wide output voltage and power flow management at lower duty cycle values. The sources can transfer energy to the load either jointly or individually in this converter with the appropriate operation of the power switches. A hardware prototype is also developed and tested efficiently to uphold the mathematical modeling, design, and operation. With fewer switches, lower voltage stress, and fewer circuit components, the suggested converter claims better gain and higher (96%) efficiency.

A New Double-Switch SEPIC-Buck Topology for Renewable Energy Applications

“…The AC small-signal technique is used to approximate the behavior of the converter, such as a linear time-invariant system around a certain switching cycle of the switches as the operating point of interest. This AC small-signal principle enables the DSSB duty cycle representations through open-loop and closed-loop transfer functions [25][26][27][28].…”

Development of multiple input supply based modified SEPIC DC–DC converter for efficient management of DC microgrid

“…It can also be used for DC standalone applications where it can be reliable. As mentioned earlier, the DC energy is more advantageous than AC energy compared to the daily and important power applications 41 – 45 . The reason to introduce the SEPIC converter among the traditional converter is that it produces a wide range of input and output at the lower value of duty cycles, here electrical stress across electrical switches is less and the power loss is also less by, which there is an increase in efficiency (above 95%).…”