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Modeling of an isolated induction generator considering saturation effect

Touti E., Kraim H., Pusca R., Romary R.

Archives of Electrical Engineering

2018

Vol. 67, nr 4

755--772

This paper proposes a self-excited induction generator model with saturation effect for power generating mode in a remote site. The model is led through the space vector mathematical formalism and allows one to analyze the steady and dynamic states. It is developed for a squirrel cage induction machine. This model provides magnetizing inductance variation able to influence the build-up and the stabilization of voltage generation when the load changes. The final result is a realistic approach model which takes into consideration the dependency of the magnetizing inductance versus magnetizing current. This novel model is validated through experimental measurements to demonstrate its validity and practicability.

Mixed eccentricity fault diagnosis in saturated squirrel cage induction motor using instantaneous power spectrum analysis

Abdellah C., Azeddine B., Pusca R., Romary R., Lecointe J. P.

Przegląd Elektrotechniczny

2016

R. 92, nr 7

116--120

Mixed eccentricity fault is one of the most common faults occurring in squirrel cage induction motors. Several techniques have been used to detect this type of fault, such as those based on vibration, axial leakage monitoring, zero-sequence component, negative sequence current, and motor current signature analysis. However, these techniques do not take into account the effect of magnetic saturation. In this paper, Instantaneous Power Signature Analysis (IPS) technique is used to detect this kind of fault, it shows the effect of harmonic saturation on the mixed eccentricity fault diagnosis of squirrel induction motors. Both simulation and experimental results for healthy and faulty motors are shown and discussed.

Do analizy ekscentryczności silnika indukcyjnego powszechnie używa się monitorowania wibracji, rozproszenia osiowego, negatywnej sekwencji prądu I kształtu prądu. Metody te niestety nie biorą pod uwagę nasycenia magnetycznego. W artykule zaproponowano metodę IPS (analiza sygnatury prądu) analizująca nasycenie harmonicznych. Przedstawiono wyniki symulacji i eksperymentalne metody.