Reliable induction motor (IM) fault detection techniques are very useful in\nindustries to diagnose IM defects and improve operational performance. An\nadaptive empirical mode decomposition (EMD) technology is proposed in\nthis paper for rotor bar fault detection in IMs. As the characteristic fault frequency\nwill change with operating conditions related to load and speed, the\nproposed adaptive EMD technique correlates fault features over different\nfrequency bands and intrinsic mode function (IMF) sidebands. The adaptive\nEMD technique uses the first IMF to detect the fault type and the second IMF\nas an indicator to predict the fault severity. It can overcome the problems of\nthe sensitivity of sideband frequencies related to the speed and load oscillations.\nThe effectiveness of the proposed adaptive EMD technique is verified\nby experimental tests under different motor conditions.
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