Work

A high power density magnetically integrated scheme of LLC converter

Year: 2025

Type: article

Abstract: To improve efficiency and power density within LLC converters, this paper presents a magnetically integrated scheme through the magnetoresistive model, which includes a resonant inductor and a transformer on one magnetic core. A magnetoresistive model is proposed to analyse the magnetic flux and is verified by simulation. Further, this paper investigates the fringing field near the core's air gap to prevent the occurrence of overheating and chaotic winding current distribution, optimizing the shapes of the transformer's secondary winding and core. A half‐brick (2.28″ × 2.4″ × 0.5″) LLC converter with a peak efficiency of 94.8% is then constructed using these integrated magnetic components, achieving a power density of 452 W/in. 3 , and maintaining a lower operating temperature of the core.

Source: IET Power Electronics

DOI: 10.1049/pel2.70006

Authors: Lei Li, Feng Hong, Minggang Chen, Qinsong Qian

Institutions: Nanjing University of Aeronautics and Astronautics, Southeast University

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,880