D18.9 - Cost-Effective Fault Diagnosis for Motor and Inverter using Bootstrap Charging and Single DC Link Current Sensor

Thursday, March 20, 2025

11:30 AM – 1:30 PM ET

Location: Level One, Hall A3

Technical Dialogue Presenter(s)

Won Hyo Jeong, MS candidate (he/him/his)

Seoul National University

Paper

Co-Author(s)

Gyu Cheol Lim

Seoul National University

Presentation
KL

Kahyun Lee

Ewha Womans University
JH

Jung-Ik Ha

Seoul National University
Seoul National University

Motor drive systems in home appliances are designed with minimal sensors and components to enhance reliability, reduce cost, and minimize size. These systems often operate continuously, making fault detection critical to ensure rapid maintenance and system longevity. This paper presents a fault diagnosis method for motor drive systems utilizing a single DC link current sensor. The proposed method leverages the existing bootstrap configuration to detect and accurately distinguishes between motor and inverter faults during the charging of the bootstrap capacitor. The charging impedance and current are analyzed for diagnosis. Experimental results validate the effectiveness of the method.