Early Detection of Insulation Failure in Electric Motors |
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150-hp motor running A-G DETERIORATION accelerated life testing actual simulated deterioration adaptive learning networks ALN INPUT PARAMETERS ALN's developed Bureau of Mines CALCULATED DETERIORATION DEVIATION Complex power components current and power data base data logger data-acquisition deterioration levels Deterioration path Ë Ë Ë early detection electric motor electrical parameters first-layer output full load heat chamber independent variables induction motors insulation deterioration laboratory motors leakage current leakage on 150-hp leakage path line current modeling process monitoring motor data motor failure motor insulation motor load level motor running unloaded motor system motor terminal motor windings negative sequence current output for deterioration phasors PNETTR modeling power levels power system pu Figure rioration rms errors Root mean squares sample sequence current polar simulated A-B SIMULATED DETERIORATION CURRENT SIMULATED DETERIORATION POWER simulated insulation leakage standard deviation stator system conditions terminal values test motors Thermocouples three-phase U.S. Bureau voltage winding temperature X₁ Y₁ Y₂