Analysis of the proximity and skin effects on copper loss in a stator core

• Autorzy: Młot A. , Korkosz M. , Grodzki P. , Łukaniszyn M.

Identyfikatory

DOI

10.2478/aee-2014-0017

• Języki publikacji: EN

Abstrakty

EN

Accurate prediction of power loss distribution within an electrical device is highly desirable as it allows thermal behavior to be evaluated at the early design stage. Three-dimensional (3-D) and two-dimensional (2-D) finite element analysis (FEA) is applied to calculate dc and ac copper losses in the armature winding at high-frequency sinusoidal currents. The main goal of this paper is showing the end-winding effect on copper losses. Copper losses at high frequency are dominated by the skin and proximity effects. A time-varying current has a tendency to concentrate near the surfaces of conductors, and if the frequency is very high, the current is restricted to a very thin layer near the conductor surface. This phenomenon of nonuniform distribution of time-varying currents in conductors is known as the skin effect. The term proximity effect refers to the influence of alternating current in one conductor on the current distribution in another, nearby conductor. To evaluate the ac copper loss within the analyzed machine a simplified approach is adopted using one segment of stator core. To demonstrate an enhanced copper loss due to ac operation, the dc and ac resistances are calculated. The resistances ratio ac to dc is strongly dependent on frequency, temperature, shape of slot and size of slot opening.

Słowa kluczowe

EN

end winding; copper loss; iron loss; ac loss; skin effect; proximity effect

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2014
• Tom: Vol. 63, nr 2
• Strony: 211--225
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wz.

Twórcy

autor

Młot A.

• Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology Prószkowska 76, 45-758 Opole, Poland

autor

Korkosz M.

• Rzeszow University of Technology, The Faculty of Electrical and Computer Engineering. W. Pola 2, 35-959 Rzeszów, Poland

autor

Grodzki P.

• Rzeszow University of Technology, The Faculty of Electrical and Computer Engineering. W. Pola 2, 35-959 Rzeszów, Poland

autor

Łukaniszyn M.

• Rzeszow University of Technology, The Faculty of Electrical and Computer Engineering. W. Pola 2, 35-959 Rzeszów, Poland

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