DIAGNOSTIC MEASUREMENTS OF CURRENT SUPPLYING AN ELECTRIC MOTOR |
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| Leon Swedrowski |
- Abstract:
- The object of the investigation presented in the paper are measurements related to diagnostics of induction motors. The described system is based on the measurement and spectral analysis of current feeding an electric motor. Diagnostic methods of motor windings making use of the current analysis are already known. The author proposes involving in this method also examination of mechanical defects, in particular, damages caused to bearings. In order to obtain positive results it is necessary to theoretically obtain information referring to the type of components that accompany the current spectrum in certain sorts of faults. This can be accomplished by tests on a motor model. The model tests should be followed by creating an appropriate measuring system sensitive to the spectral components responsible for some specific damages . Due to the fact that the amplitude of the network voltage basic harmonic in the current spectrum is high, there has been proposed a preliminary elimination of this component from the analog current signal. The proposed filter and its characteristics are shown in the paper. Further processing of the signal is carried out numerically. The paper presents also the measuring system and provides results of the investigations carried out on real objects, i.e. faultless motors, and those encumbered with specially prepared defect.
- Keywords:
- motor, current spectrum
- Download:
- PWC-2003-TC10-005.pdf
- DOI:
- -
- Event details
- Event name:
- XVII IMEKO World Congress
- Title:
Metrology in the 3rd Millennium
- Place:
- Dubrovnik, CROATIA
- Time:
- 22 June 2003 - 28 June 2003