Zusammenfassung
Die dreidimensionale Geometrie des Motor-Stirnbereichs, bestehend aus dem Wickelkopf, dem Gehäuse und ergänzenden Konstruktionsteilen, ist äußerst komplex und deshalb für analytische Berechnungen sehr schwer zugänglich. Die Komplexität der Geometrie erfordert darüber hinaus zeitaufwändige Modellierungen und rechentechnisch anspruchsvolle Simulationen. In dieser Publikation werden numerische Ansätze vorgestellt, die es erlauben, die Wickelkopf-Geometrie und die Rotorstrom-Erregung vereinfacht zu erfassen. Die Anwendung der gezeigten Methoden wird zunächst anhand der Berechnung der Wickelkopf-Streuinduktivitäten und der Wirbelstromverluste in den Pressplatten gezeigt. Zudem werden die mechanischen Verformungen des Wickelkopfes eines Synchrongenerators im Nennbetrieb untersucht. Für die Analyse des zeitvariablen Magnetfeldes wurde die T, Φ − Φ –Formulierung in Verbindung mit einer 3-D zeitharmonischen Finite-Elemente-Methode (FEM) angewandt.
Summary
The 3-D geometry of the motor end-region consisting of the end-winding together with the motor cross-section, housing and complementary construction parts is very complex, which makes the analytical computations of the electromagnetic phenomena related to the end-region very cumbersome and non accurate. Furthermore, owing to the complicated geometry, also the preparation of the numerical model is extremely time consuming and numerical simulation very computationally pretentious. The aim of this paper is to present the numerical approaches, which overcome these problems by introducing methods to simplify the modeling procedure of the machine end-winding and the consideration of the rotor current excitation. In this paper the use of the proposed methods is demonstrated by computing the induction motor end-winding leakage inductance, the computation of the eddy-current losses in the machine clamping-plates and by the calculation of the mechanical deformations of the synchronous generator end-winding under operating load conditions. Analysis of the time-variant magnetic field has been performed using T, Φ − Φ formulation for a 3-D time-harmonic finite element method (FEM).
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*This work has been supported by the Christian Doppler Research Association (CDG) and by the ELIN Motoren GmbH.
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Stermecki, A., Biró, O., Ofner, G. et al. Numerical simulation of electromagnetic and mechanical phenomena in the end-winding region of three-phase induction machines* . Elektrotech. Inftech. 128, 167–173 (2011). https://doi.org/10.1007/s00502-011-0827-5
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DOI: https://doi.org/10.1007/s00502-011-0827-5