Field approach to power loss analysis of pulse transformer

• Autorzy: Łyskawiński, W.

Warianty tytułu

PL

Analiza strat mocy transformatora impulsowego w ujęciu polowym

• Języki publikacji: EN

Abstrakty

EN

In the paper an algorithm for power loss determination in pulse transformers using a field-circuit model is described. The software based on this algorithm is used to calculate losses and efficiency of a pulse transformer. The mathematical model of transformer transients includes: the equation of electromagnetic field, the equations of electric circuits. In order to solve these equations the finite element method, "step-by-step" procedure and Newton-Raphson process are used. The nonlinearity of the ferrite core and eddy currents excited in the core and the windings are taken into consideration. Power losses and efficiency of a pulse transformer for different load resistances, input signal shapes and lengths of the central leg of the core are analysed. Selected results of simulations are shown.

PL

W artykule opisano algorytm wyznaczania strat mocy w transformatorze impulsowym na podstawie polowo-obwodowego modelu zjawisk. Opracowany na jego podstawie program wykorzystano do obliczania strat i sprawności w transformatorze impulsowym. Analizowano straty mocy i sprawność transformatora w zależności od rezystancji obciążenia, kształtu sygnału zasilającego i długości szczeliny powietrznej w środkowej kolumnie rdzenia. Przedstawiono wybrane wyniki obliczeń symulacyjnych.

Słowa kluczowe

PL

straty mocy; transformator impulsowy; model polowo-obwodowy; prądy wirowe

EN

power losses; pulse transformer; field-circuit model; eddy currents

• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2007
• Tom: Vol. 56, nr 2
• Strony: 103-114
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Łyskawiński, W.

• Institute of Electrical Engineer and Electronics, Poznań University of Technology,

Bibliografia

• 1. Besbes M, Ren Z., Razek A.: Finite element analysis of magnetomechanical coupled phenomena in magnetostrictive materials. IEEE Transactions on Magnetics, Vol. 32, No. 3, May 1996, pp. 1058-1061.
• 2. Dąbrowski W., Król J., Sobon M.: Ferrite materials and cores, soft magnetic ferrites, Ferroxyd (in Polish). WPM "WEMA", Warsaw 1979.
• 3. Laouamri K., Keradec J.-P., Ferrieux J.-P., Barbaroux J.: Dielectric losses of capacitor and ferrite core in an LCT component. IEEE Transactions on Magnetics, Vol. 39, No. 3, May 2003, pp. 1574-1577.
• 4. Łyskawiński W.: Field-circuit transient analysis of pulse-excited transformer. Proceedings of XVIII Symposium Electromagnetic Phenomena in Nonlinear Circuits, Poznań, June 2004, pp. 49-50.
• 5. Nowak L., Demenko A., Mikołajewicz J., Radziuk K.: Pulse-excited transient electromagnetic field. Proceedings of XVI Symposium Electromagnetic Phenomena in Nonlinear Circuits, Kraków, September 2000, pp. 19-22.
• 6. Nowak L., Demenko A., Szeląg W.: Comparison of 3D and 2D field-circuit models of power transformer transients. COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, Emerald Group Publishing Limited, Vol. 23, No. 4, 2004, pp. 1100-1109.
• 7. Schellmanns A., Berrouche K., Keradec J.-P.: Multiwinding transformers: a successive refinement method to characterize a general equivalent circuit. IEEE Transactions on Instrumentation and Measurement, Vol. 47, No. 5, October 1998, pp. 1316-1321.
• 8. Sullivan C.R.: Computationally efficient winding loss calculation with multiple windings, arbitrary waveforms, and two-dimensional or three- dimensional field geometry. IEEE Transactions on Power Electronics, Vol. 16, No. 1, January 2001, pp. 142-150.
• 9. Szeląg W.: Demagnetization effects due to armature transient currents in the permanent magnet self starting synchronous motor. Proceedings of 5-th International Symposium on Electric and Magnetic Fields, Gent, May 2000, pp. 93-94.