E. Bonaldi, L.E.L. de Oliveira, L. D. da Silva, G. L. Torres
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引用次数: 5
Abstract
The predictive maintenance applied to three-phase-induction motors through the motor current signature analysis is the highlight of the moment. Removing the fundamental component of the stator current signal is an important task in this approach. With this component extracted it is possible to improve the dynamic range of the A/D converter in order to get a more precise digitized signal and improve the failure detection. In general, notch filters are utilized to accomplish this task, but they present problems such as attenuation of some important frequencies located very close to the fundamental component which have information about a specific failure. This paper introduces the synchronous reference frame approach, generally applied to active power filters, to solve the presented problem.
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