Current and Stray Flux Combined Analysis for the Automatic Detection of Rotor Faults in Soft-Started Induction Motors

被引:9
|
作者
Navarro-Navarro, Angela [1 ]
Zamudio-Ramirez, Israel [1 ,2 ]
Biot-Monterde, Vicente [1 ]
Osornio-Rios, Roque A. [2 ]
Antonino-Daviu, Jose A. [1 ]
机构
[1] Univ Politecn Valencia UPV, Inst Tecnol Energia, Camino Vera S-N, Valencia 46022, Spain
[2] Autonomous Univ Queretaro, HSPdigital CA Mecatron Engn Fac, San Juan Del Rio 76806, Mexico
关键词
current signals; stray flux signals; LDA; automatic fault diagnosis; induction motor; broken rotor bars; soft-starters; WINDING FAULTS; BAR DETECTION; CLASSIFICATION; DIAGNOSIS;
D O I
10.3390/en15072511
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Induction motors (IMs) have been extensively used for driving a wide variety of processes in several industries. Their excellent performance, capabilities and robustness explain their extensive use in several industrial applications. However, despite their robustness, IMs are susceptible to failure, with broken rotor bars (BRB) being one of the potential faults. These types of faults usually occur due to the high current amplitude flowing in the bars during the starting transient. Currently, soft-starters have been used in order to reduce the negative effects and stresses developed during the starting. However, the addition of these devices makes the fault diagnosis a complex and sometimes erratic task, since the typical fault-related patterns evolutions are usually irregular, depending on particular aspects that may change according to the technology implemented by the soft-starter. This paper proposes a novel methodology for the automatic detection of BRB in IMs under the influence of soft-starters. The proposal relies on the combined analysis of current and stray flux signals by means of suitable indicators proposed here, and their fusion through a linear discriminant analysis (LDA). Finally, the LDA output is used to train a feed-forward neural network (FFNN) to automatically detect the severity of the failure, namely: a healthy motor, one broken rotor bar, and two broken rotor bars. The proposal is validated under a testbench consisting of a kinematic chain driven by a 1.1 kW IM and using four different models of soft-starters. The obtained results demonstrate the capabilities of the proposal, obtaining a correct classification rate (94.4% for the worst case).
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页数:19
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