Affiliations: Key Laboratory of Image Information Processing and Intelligent Control, Ministry of Education, School of Automation, Huazhong University of Science and Technology, Wuhan, Hubei, China
Correspondence:
[*]
Corresponding author: Jin Zhao, Key Laboratory of Image Information Processing and Intelligent Control, Ministry of Education, School of Automation, Huazhong University of Science and Technology, Wuhan, Hubei, China. E-mail:jinzhao617@hust.edu.cn
Abstract: This paper presents a novel single and multiple open
circuit fault detection and identification method for three phase Voltage
Source Inverter (VSI) fed vector controlled drives. In healthy condition,
d-axis reference voltage is constant. When fault occurs, it is distorted,
which is applied to detect the insulated-gate bipolar transistors (IGBTs)
open circuit fault occurrence. The d-axis reference voltage distorted last
for an interval time, the fault can be isolated by calculating the instant
current vector rotating angles when the d-axis reference voltage gets
distorted and recovered to constant, respectively, combined with space
position of the current arc trajectory. The proposed method is fair robust
to load torque changes and variable speed, and can be embedded into the
existing drive software as a subroutine without excessive computational
effort. The feasibility of the proposed fault diagnosis algorithm is
evaluated by both simulation and experimental results.
Keywords: PWM voltage-source-inverter, induction motor drives, inverter, open-circuit, fault diagnosis
