Additional losses by magnetic field harmonics in the rotor bars of asynchronous machines and their influence

• Autorzy: Schuffenhauer U. , Kuß H.
• Języki publikacji: EN

Abstrakty

EN

Optimizing the efficiency of modern asynchronous machines requires the knowledge of the particular loss components. In this contribution a method shall be presented, where by the transient FEM-calculation the copper losses in the rotor bars by harmonic field effects and the consequential originating harmonic currents can be estimated. By this way the determination of the current density of the rotor current harmonics is carried out along the height of the rotor bar. The loss distribution from the bar bottom to the bar tip is derived from the effective current density and its spatial distribution. The calculation shows, that the additional losses represent a considerable quantum of the total losses, they are partly in the range of the fundamental copper losses and therewith they have a lasting effect on the efficiency of the machine. By convenient geometrical actions a reduction of the additional losses is possible.

Słowa kluczowe

EN

induction motors; losses; additional losses; finite element method

• Wydawca: AGH University of Science and Technology ; Lodz University of Technology
• Czasopismo: Electrical Power Quality and Utilisation. Journal
• Rocznik: 2006
• Tom: Vol. 12, nr 2
• Strony: 117--120
• Opis fizyczny: Bibliogr. 4 poz.

Twórcy

autor

Schuffenhauer U.

autor

Kuß H.

• University of Applied Sciences, Faculty Electrical Engineering; Friedrich-List-Platz 1, D-01069 Dresden,

Bibliografia

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• 2. Müller G.: Betriebsverhalten rotierender elektrischer Maschinen. Verlag Technik Berlin 1985.
• 3. Janssen W.: Analytische Berechnung von Stromwärmever-lusten in Käfigläufermotoren unter Einschluß der Ankerrückwirkung zweiter Art und der Ständernutung. Elektrie, Band 56 (2002) Heft 1.4, Berlin 2002.
• 4. Schuffenhauer U., Kuß H.: A novel method for the determination of the iron losses and the rotor additional losses in electric rotating field machines. XLI Symposium on Electrical machines SME 2005, Opole 2005.