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Vol. 154, Issue 7, July 2013, pp. 165-173




Fault Diagnosis and Fault-tolerant Control of Position Sensors for Switched Reluctance Motors
1, 2 Xiaohui Mo and 1 Yi Zhang

1 Department of Information Technology, Jinling Institute of Technology, No. 99, Hongjing Ave., Jiangning Dist., Nanjing 211169, China

2 School of Automation, Southeast University, No. 2, Sipailou, Nanjing 210096, China

1 Tel.: 8625-86188966, fax: 8625-86188987
E-mail: mxh@jit.edu.cn, zhangyi@jit.edu.cn


Received: 28 April 2013   /Accepted: 19 July 2013   /Published: 31 July 2013

Digital Sensors and Sensor Sysstems


Abstract: Position sensor is the key of exact commutation for switched reluctance motor (SRM). When position sensor is faulted, some phase information of commutation will be lost, causes torque decrease, affects the system reliability. Through the analysis of the fault position signals, a real-time diagnostic method that detected the edge sequences of position signals and calculated the angle between the adjacent edges of position signals is proposed. After fault of position signal is diagnosed, fault-tolerant control is carried out immediately by taking advantage of the redundant information of position signal detection scheme and the time between the adjacent edges of position signals. The validity and practicability of fault analysis, fault diagnosis and fault-tolerant control is verified by simulated fault experiments on SRM.


Keywords: Switched reluctance motor (SRM), Position signal, Fault analysis, Fault diagnosis, Fault-tolerant control.


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