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Online Anomaly Detection of Brushless DC Motor Using Current Monitoring Technique

Volume 10, Number 3, May 2014 - Paper 03 - pp. 263-271


1 College of Mechanical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, CHINA
2 Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, HONG KONG
3 Department of Systems Engineering and Engineering Management, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, HONG KONG

(Received on July 19 2013, revised on January 16, and March 25, 2014)


Brushless DC (BLDC) motor fan is one of the most widely used electronic components for thermal management. Failures of fans will cause seriously problems, such as overheat, shut down and even burnt, in their host systems. Thus, anomaly detection of fan gains increasing attention. This paper investigates into anomaly detection of generalized-roughness bearing faults in BLDC motor fan using current monitoring technique. In the experiment, it was found that there were about 9% changes in current and rotary speed of fan when the BLDC motor behaved unusual. Mathematical modeling of BLDC motor and physics-of-failure analysis were employed to explain the experimental findings.


References: 15

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