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CSME 2020/12
Volume 41 No.6
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781-790
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A Novel Scheme on Fault Diagnosis of Induction Motors using Current per Voltage Bode Diagram
Widagdo Purbowaskito a, Chen-Yang Lana, Meng-Kun Liua and Kenny Fuhb
aDepartment of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 106, R.O.C.
bInnolux Corporation, Jhunan Science Park, Miaoli County, 35053, R.O.C.
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Abstract:
Unexpected failure of industrial motors is costly in production loss and is time consuming in repairing process. Motor current signature analysis has been used for fault diagnosis and detection but this method is depended on the voltage input quality and motor loading level in order to achieve accurate results. In this study, a novel motor fault detection and diagnosis method is proposed. The method is a preliminary study of a new approach in model-based fault detection and diagnosis method. It works by analyzing the bode diagram of the induction motor that will be generated by using current per voltage ratio in frequency-domain. Five industrial induction motors with three different conditions are the examples in this study. Two induction motors are in healthy condition, two induction motors are operated under misalignment/unbalance fault, and one induction motor is operated under bearing fault condition. The study results show that the proposed bode diagram approach can be used to detect the motor faults and the difference patterns appeared are visibly notable for the fault detection and diagnosis (FDD) of motor condition.
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Keywords: bode diagram, fault detection and diagnosis, frequency-domain, induction motor, MCSA
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*Corresponding author; e-mail:
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©
2020
CSME , ISSN 0257-9731
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