Contents
It is demonstrated that the Bubnow-Galrekin method can be applied for the analysis of the non-steady state in conductors. The Joule power losses in a rectangular conductor placed in a semi-closed slot and the electrodynamic force acting on this conductor are calculated. The equivalent circuit of the impedance of the conductor is also considered. The investigations are made by using the Bubnow-Galerkin method for the parabolic equation.
Übersicht
Es wird gezeigt, daß man die Methode von Bubnow-Galerkin zur Analyse der nichtstationären Vorgänge in den Leitern anwenden kann. Es werden die Stromwärmeverluste für den rechteckigen Leiter in der halbgeschlossenen Nut einer elektrischen Maschine und die auf den Leiter wirkende Kraft berechnet. Die Ersatzschaltungen für die Impedanz einer Maschinennut werden weiter betrachtet. Zur Analyse der parabolischen Differentialgleichung wird die Methode von Bubnow-Galerkin angewandt.
Similar content being viewed by others
Abbreviations
- B :
-
the magnetic induction
- B x ,B y :
-
Components of the magnetic induction
- C :
-
Operator in a Hilbert space
- E :
-
z-component of the electric field
- F :
-
Electrodynamic force
- F x ,F y :
-
Components of the electrodynamic force
- H :
-
Hilbert space
- H C :
-
Energetic space of a positive definite operatorC
- I :
-
Current
- \(j = \sqrt { - 1} \) :
-
Imaginary unit
- L :
-
Inductance
- ℒ:
-
Laplace transform
- P :
-
Power
- R :
-
Resistance
- Z :
-
Impedance
- z * :
-
Dimension coupled with complex dimensionz
- Rez, Imz, |z|:
-
Real part, imaginary part and modulus of complex numberz
- μ:
-
Magnetic permeability
- γ:
-
Conductance
- ω:
-
Pulsation
- ∇2 :
-
Scalar Laplacian
- 1 x , 1 y :
-
Unit vectors
- (x/y):
-
Scalar product of elementsx,y of Hilbert spaceH
- \(\left\| \chi \right\| = \sqrt {(\chi |\chi )} \) :
-
Norm of elementx of Hilbert spaceH
- \(\delta _{n_0 } \) :
-
\(\left\{ {\begin{array}{*{20}c} 1 & {at} & {n = 0} \\ 0 & {at} & {n \ne 0} \\\end{array}} \right.\)
References
Beresin, I. S.: Numerische Methoden. Bd. 11. Berlin: VEB Deutscher Verlag der Wissenschaften 1970
Collatz, L.: Numerische Behandlung von Differentialgleichungen. Berlin, Göttingen, Heidelberg: Springer 1955
Dąbrowski, M.: Magnetic fields and circuits of electric machines. Warsaw: PWNT 1971 (in Polish)
Kantorowitsch, L. W.: Funktionalanalysis in normierten Räumen, Berlin: Akademie-Verlag 1964
Maurin, K.: Methods of Hilbert spaces. Warsaw: PWN 1967
Mikhlin, S. G.: The problem of the minimum of a quadratic functional. Holden-Day 1966
Mocanu, C. I.: Nichtstationäre Stroniverdrängung in einer Maschinennut von rechteckigem Querschnitt. Archiv f. Elektrotech. 55 (1973) 164–170
Nürnberg, W.: Die Asynchronmaschine. Berlin: Springer 1963
Purczyński, J.: Ritz method of calculation of leakage inductance. Archiwum Elektrotechniki 21 (1972) 743–756 (in Polish)
Purczyński, J., Rolicz, P., Sikora, R.: Use of Ritz and Bubnow-Galerkin methods for calculation of induct of conductors. Arch. f. Elektrotech. 57 (1975) 119–126
Rolicz, P.: Calculation of impedance of conductors by direct methods of functional analysis. Doctoral Thesis, Szczecin 1973 (in Polish)
Rolicz, P.: Use of Bubnow-Galerkin Method for calculation of impedance of conductors. Archiwum Elektrotechniki 24 (1975) 89–102 (in Polish)
Sikora, R., Lipinski, W.: Die Ersatzschaltungen der zweidimensionalen nichtstationären Stromverdrängung in einer Maschinennut. Arch. f. Elektrotech. 56 (1974) 252–254
Sikora, R., Rolicz, P.: Analysis of forces acting on conductors placed in slots of electric machines. Archiwum Elektrotechniki 22 (1973) 291–299, 641–649 (in Polish)
Smith, M. G.: Laplace transform theory. London: Van Nostrand 1966
Smythe, W. R.: Static and dynamic electricity. New York: McGraw-Hill 1950
Sobolevskii, P. E.: Bubnow-Galerkin method for parabolic equations in Hilbert space. Dokl. A.N. SSSR 178 (1958) 548–551 (in Russian)
Swann, S. A., Salmon, I. W.: Effective resistance and rectance of a rectangular conductor placed in a semi-closed slot. Proc. IEE (1963) 1656–1660.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Rolicz, P. Transient skin effect in a rectangular conductor placed in a semi-closed slot. Archiv f. Elektrotechnik 57, 329–338 (1976). https://doi.org/10.1007/BF01575747
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01575747