Work

An Open-circuit Fault Diagnosis Method for Bridge Converter in DSEG Based on Current Detection

Year: 2026

Type: conference-paper

Abstract: The reliable operation for the controlled rectifier system of doubly salient electromagnetic generator (DSEG) largely depends on the condition of bridge converter. However, as a key component for the controlled rectifier system of DSEG, the bridge converter is also the weakest link that is most prone to failure. Once the open-circuit fault occurs in the switching tubes and anti-parallel diodes, it will lead to severe consequences, such as the intensified fluctuations of output voltage and significant degradation of power generation performance. To address this issue, this article proposes an open-circuit fault diagnosis method for bridge converter based on current detection. This method constructs diagnostic features for open-circuit fault judgment by real-time detection of bus current and phase current, combined with the drive signals of the switching tubes. The proposed method does not require complex model, has a simple structure, and responds quickly, which enables rapid diagnosis of open-circuit faults in switching tubes and anti-parallel diodes. Finally, the simulation results verify the effectiveness of the proposed method.

Source: IEEE International Electrical and Energy Conference (CIEEC)

DOI: 10.1109/cieec69682.2026.11572424

Authors: Yixi Chen, Bo Zhou, Yijun Zhang, Yi Lu

Institutions: Nanjing University of Aeronautics and Astronautics, Zhengzhou University, Nanjing Forestry University

Language: English

Topic: Multilevel Inverters and Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

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

Open Access status: hybrid

Funder: National Natural Science Foundation of China