An Integrated Bidirectional Multi-Source DC–DC Converter With VMC Approach for VSI-Fed Motor Drive Using Non-Isolated Topology

Hybrid energy sources have seen widespread integration in the power and electric vehicle (EV) industries in recent years, leading to the increased use of multi-source DC-DC converters for integration purposes. This study aims to expand the applications of multisource converters by proposing an arrangement that enables optimal DC output voltage control when integrating hybrid energy sources. Specifically, a non-isolated configuration of two different converters is proposed for applications utilizing hybrid power sources. The proposed integrated converter achieves ZVS for all switches in different modes of operation, while various model order reduction techniques are utilized to reduce its high-order transfer function. The study provides a comprehensive analysis of heuristic algorithm techniques to obtain optimized controller-tuned parameters. To analyze the speed performance of the FPGA-controlled BLDC motor drive under-voltage mode control (VMC) for different loading torque settings, the working modes of the converter are determined. Furthermore, a functional prototype of a multisource converter configuration capable of powering a 1 kW, 200 V BLDC load has been constructed. The experimental results confirm the effectiveness of the proposed design in achieving bidirectional power flow and achieving a high efficiency of more than 94%, even under low load conditions.