Work

Ultra high frequency CRM-PFC converter based on GaN devices: design and experimental validation

Year: 2025

Type: article

Abstract: Increasing the switching frequency can reduce the size of energy storage components such as the PFC inductor and capacitor, thereby improving power density. However, this also increases switching losses and leads to severe thermal stress. To address this issue, a rectifier-type CRM-PFC circuit based on GaN devices is proposed. The control scheme combines voltage-loop feedback with current-loop feedforward and eliminates the need for zero-current detection (ZCD), enabling stable CRM operation at ultra high frequencies. Based on the proposed control method, Zero-Voltage Switching (ZVS) is achieved across a wide input voltage range.Experimental results show that the proposed PFC circuit achieves a maximum output power of 3.6 kW. The switching frequency spans from 287 kHz to 500 kHz, with a peak efficiency of 97.1% and a power factor exceeding 0.99 under full-load conditions.

Source: IEICE Electronics Express

DOI: 10.1587/elex.22.20250498

Authors: Yuning Lin, Peifeng Zheng, Rongbo Zhang, Meng Wang, Linyan Guo, Kuiyuan Zhang

Institutions: China University of Geosciences, China University of Geosciences (Beijing)

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: diamond

Funders: China University of Geosciences, Beijing, China University of Geosciences