Volume 37, Number 6, December 2019
|Page(s)||1278 - 1284|
|Published online||11 February 2020|
Fault Diagnosis and Compensation Strategy of BLDC Motor Drives with Hall Sensors
School of Automation, Northwestern Polytechnical University, Xi'an 710129 China
In a brushless DC motor drive system, two fault diagnosis methods were proposed in order to investigate the faults of Hall position sensors, and the corresponding compensation strategy was carried out. Firstly, the differences of Hall signal sequences during normal and fault situation of motor were analyzed, then a fault diagnosis method based on the characteristics of Hall signal sequences was proposed. In order to detect the faults of Hall position sensors in real time, a sliding mode-based super-twisting speed observer was established and combined with the Hall signal sequences. Under fault situations, the compensation controller was established, and a second-order speed prediction method was used to generate the compensation Hall signals of the faulty sensors. Finally, theoretical analysis and experiments demonstrate the effectiveness of the present fault diagnosis methods and compensation strategy.
Key words: brushless DC motor / hall position sensors / fault diagnosis / super-twisting observer / compensation strategy
关键字 : 无刷直流电机 / 霍尔位置传感器 / 故障诊断 / 超螺旋观测器 / 补偿策略
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
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