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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >A Novel Approach for Sensitive Inter-turn Fault Detection in Induction Motor Under Various Operating Conditions
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A Novel Approach for Sensitive Inter-turn Fault Detection in Induction Motor Under Various Operating Conditions

机译：各种操作条件下感应电动机敏感匝间故障检测的新方法

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摘要

Induction motors are subjected to thermal, electrical and mechanical stresses during continuous operation. If any of these stresses become excess than normal condition, it is a symptom of commencement of fault in the inductionmotor. If these faults are not detected at an incipient stage, it may result in the failure of the motor. Turn-to-turn short-circuit faults are the major causes for the stator winding insulation failure. In the proposed work, a novel approach is suggested to detect these faults in the induction motor. In this approach, the discrete wavelet transform (DWT) is performed on the Park's vector modulus of current signals. The accuracy of DWT can be enhanced by selecting the proper wavelet type and its order along with levels of decomposition. With this context, an attempt is made to investigate the best-suited mother wavelet by testing various orthogonal wavelet functions on simulated signal and justified that the db44 is to be the best suitable wavelet for the detection of an inter-turn fault in the induction motor. The current signals are obtained experimentally under operating conditions with balanced supply voltages, unbalanced supply voltages, load slip variation and gradual variation in load condition and analyzed. The obtained results show the sensitivity and robustness of the proposed approach. The fault severity factor is also suggested for evaluating the severity of fault in the induction motor.
机译：在连续操作期间，感应电动机经受热，电气和机械应力。如果这些压力中的任何一种变得超过正常情况，则它是诱导电流中出现故障的症状。如果在初期未检测到这些故障，则可能导致电机的故障。转弯短路故障是定子绕组绝缘故障的主要原因。在拟议的工作中，建议一种新的方法来检测感应电机中的这些故障。在这种方法中，在公园的电流信号的矢量模量上执行离散小波变换（DWT）。通过选择适当的小波型及其顺序以及分解的水平，可以提高DWT的精度。利用这种情况，通过在模拟信号上测试各种正交小波函数并证明DB44是用于检测感应电动机的变频故障的最佳合适的小波来研究最佳主体小波函数的尝试通过测试各种正交小波函数来研究最佳的母小波。 。当前信号在通过平衡的电源电压，不平衡的电源电压，负载差异和负载条件下逐渐变化的操作条件下进行实验获得，并分析。所获得的结果表明了所提出的方法的敏感性和鲁棒性。还建议出现故障严重性因素来评估感应电机中的故障的严重程度。

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