A Family of Magnetic Coupling DC-DC Converters With Zero-Voltage-Switching Over Wide Input Voltage Range and Load Variation

Abstract

This paper presents a family of soft-switching DC-DC converters with a simple auxiliary circuit consisting of a coupled winding and a pair of auxiliary switch and diode. The auxiliary circuit is activated in a short interval and thus the circulating conduction losses are small. With the auxiliary circuit, zero-voltage-switching (ZVS) and zero-current-switching are achieved for the main and auxiliary switches respectively, over wide input voltage range and load variation. In addition, the reverse-recovery problem of diodes is significantly alleviated because of the leakage inductor. Furthermore, the coupled inductor simultaneously serves as the main and auxiliary inductors, contributing to reduced magnetic component in comparison with the conventional zero-voltage-transition (ZVT) converters. Experimental results based on a 500 W prototype buck circuit validate the advantages and effectiveness of the proposed magnetic coupling ZVS converter.

Artificial Intelligence and Agent based Modeling for Power System Engineering

“…This auxiliary current is processed by three converters: output regulation converter, battery output converter, and the battery charger. A hybrid DC-DC converter was suggested by Yuan, Peng, Liu, and Yi [25] for use in a laptop that draws power from a fuel cell. Unfortunately, a significant drop in voltage is causing issues for this power distribution system, necessitating a voltage regulator module (VRM).…”

“…Adjusting the pulse width of switch S1 in the center of the converter permits users to effectively determine the voltage at its output. Fig 13 shows a proposed unique zero-voltage switching DC-to-DC converters by Chen et al [25] for renewable energy conversion systems, which makes use of a voltage source inverter and a doubler-voltage system composed of coupled inductor. When an active switch is employed, a voltage stress is created.…”