A Novel Open-Circuit Fault Diagnosis Method for Voltage Source Inverters With a Single Current Sensor

2018 ◽  
Vol 33 (10) ◽  
pp. 8775-8786 ◽  
Author(s):  
Hao Yan ◽  
Yongxiang Xu ◽  
Jibin Zou ◽  
Yuan Fang ◽  
Feiyang Cai
Keyword(s):  
Fault Diagnosis ◽  
Open Circuit ◽  
Voltage Source ◽  
Current Sensor ◽  
Voltage Source Inverters ◽  
Diagnosis Method ◽  
Circuit Fault Diagnosis

scholarly journals A Hybrid System Model-Based Open-Circuit Fault Diagnosis Method of Three-Phase Voltage-Source Inverters for PMSM Drive Systems

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1251 ◽  
Author(s):  
Tao Chen ◽  
Yuedou Pan ◽  
Zhanbo Xiong
Keyword(s):  
Fault Diagnosis ◽  
Hybrid System ◽  
Open Circuit ◽  
System Model ◽  
Voltage Source ◽  
Phase Voltage ◽  
Voltage Source Inverters ◽  
Three Phase ◽  
Diagnosis Method ◽  
Drive Systems

This paper presents an open-circuit (OC) fault diagnosis method of three-phase voltage-source inverters (VSIs) for permanent magnet synchronous motor (PMSM) drive systems based on the hybrid system model (HSM). On the basis of phase voltage analysis, the HSM of the PMSM-inverter system was established, which can describe the system more accurately. To quickly diagnose whether the fault occurs, a current estimator was constructed based on the healthy HSM. Different fault types of the VSI can be simulated synchronously by the HSM, and the similarity between each simulated fault type and the actual one is evaluated based on the Euclidean distance method. Therefore, the fault isolation can be carried out according to the characteristics of Euclidean distances. The proposed method has the advantages of fast diagnosis speed and strong robustness, and it does not require additional sensors. By the presented diagnosis algorithm, the fault can be detected and isolated within a time interval about 5% and 10% of the current fundamental wave period, respectively. The simulation and experimental results verify the effectiveness of the proposed method.

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