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1 Maszyny Elektryczne : zeszyty problemowe

1 2012

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Estymacja poślizgu dla dużych maszyn indukcyjnych w oparciu o analizę prądu stojana

Orman M., Orkisz M., Pinto C. T.

Maszyny Elektryczne : zeszyty problemowe

2012

Nr 3(96)

109-114

Many methods exist for detecting defects in induction machines. Most of them require a precise knowledge of the slip of the rotor during machine's operation. It is, therefore, important to be able to determine the slip precisely. This article presents a recently developed algorithm for estimating the rotor slip In large induction machines. The proposed algorithm is based on the analysis of stator current. The main idea is to find the best fit of the spectrum features (peaks) to the operating point of the machine. The output of the algorithm is the estimated slip. The method is verified by numerical calculations as well as actual measurements, which show clearly that the presented metod produces very high quality results. It can, therefore, become an important part of machine monitoring systems. Presented algorithm successfully determines the value of the slip even for large machines with relatively small slip, even in the cases where majority of standard methods do not lead to adequate results.