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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：不同工况下感应电动机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：感应电动机在连续运行期间会承受热，电和机械应力。如果这些压力中的任何一个变得超过正常条件，则这是感应电动机开始故障的征兆。如果在初期阶段未检测到这些故障，则可能导致电动机故障。匝间短路故障是定子绕组绝缘故障的主要原因。在提出的工作中，提出了一种新颖的方法来检测感应电动机中的这些故障。在这种方法中，对电流信号的Park矢量模量执行离散小波变换（DWT）。通过选择适当的小波类型及其顺序以及分解级别，可以提高DWT的精度。在这种情况下，尝试通过在模拟信号上测试各种正交小波函数来研究最适合的母小波，并证明db44是最适合检测感应电动机匝间故障的小波。 。电流信号是在具有平衡电源电压，不平衡电源电压，负载滑差变化和负载条件逐渐变化的工作条件下通过实验获得的，并进行了分析。获得的结果表明了该方法的敏感性和鲁棒性。还建议使用故障严重性因子来评估感应电动机的故障严重性。

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