Multiport Bidirectional Converter with Resonant and PWM Modes for Drives Applications

This paper introduces a novel multiport DC-DC converter topology specifically designed for drive applications. The proposed topology offers the flexibility to operate in reso-nant mode during forward operation, achieving both buck and boost modes by adjusting the switching frequency. A significant advantage of this converter is its bidirectional functionality, allowing seamless buck and boost conversions in reverse operation. Governed by control commands to wide bandgap (WBG) devices, this versatility highlights the converter's adaptability to various needs. Notably, the primary power source is a Fuel cell stack, with a secondary Source as LiFePO4 battery for storing regenerative power. The design of magnetics, control algorithms are essential for ensuring performance across all operational modes and suitable ratings up to several kilowatts, presents a major challenge that this work aims to address. The comprehensive range of modes and operational flexibility represent the most notable outcomes of this article, which is verified via detailed simulation results. The structure of the paper is organized as follows: Section 1 provides an introduction, setting the context for the study. Section 2 delves into the proposed topology and its various possible operating modes. Section 3 presents the modeling of the converter and discusses the various obtained plots, which is followed by the results and conclusion.