Optimum EMC design of flyback and load resonant converters using toroids with air gaps

• Autorzy: Stadler A. , Albach M. , Durbaum T.
• Języki publikacji: EN

Abstrakty

EN

In this paper the external magnetic stray field is investigated in transformers realized on gapped toroids with a rectangular cross section. An analytical method is used in which the field distribution is calculated by means of orthogonal expansion. As a conclusion it is shown that optimum EMC design for the case of a flyback converter is given by the results for a simple inductor. In case of a load resonant converter minimum parasitic induction is obtained, if the winding conducting maximum current is located exactly above the air gap. The second winding has to be located as close as possible to the first one with respect to the desired value of the total leakage inductance.

Słowa kluczowe

EN

transformers; toroidal core; magnetic stray field; power converter

• Wydawca: AGH University of Science and Technology ; Lodz University of Technology
• Czasopismo: Electrical Power Quality and Utilisation. Journal
• Rocznik: 2005
• Tom: Vol. 11, nr 2
• Strony: 15--22
• Opis fizyczny: bibliogr. 8 poz.

Twórcy

autor

Stadler A.

• Friedrich-Alexander University of ErIangen-Nuremberg, Germany

autor

Albach M.

• Friedrich-Alexander University of ErIangen-Nuremberg, Germany

autor

Durbaum T.

• Friedrich-Alexander University of ErIangen-Nuremberg, Germany

Bibliografia

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• 2. Durbaum T., SauerIiinder G.: Design procedure for load resonant converters using integrated magnetics, 45th European Conference on Power Electronics, Orives and Motion PCIM 2002, May 2002, p. 341-346
• 3. Dlirbaum T.: First harmonie approximation including design constraints. IEEE 20th International Teleeommunieations Energy Conference INTELEC 1998, September 1998, p. 321-328
• 4. Dlirbaum T., SauerIlinder G.: Optimisation of the transjormer turns ratio by means of the first harmonic approximation . Proceedings of the International Conference and Exhibition on Power Conversion and Intelligent Motion PCIM 1998, May 1998, p. 681-689
• 5. EN 55011: 2003, EN 55015-1: 2003.
• 6. Ferroxcube, Produet selection guide. 2004.
• 7. Kazimierczuk M.K., Czarkowski D.: Resonant power converters. Wiley-Interscience Publication, 1995, Chapter 18.
• 8. MitcheII O. M. : DC-DC switehing regulator analysis. McGraw-Hill, 1988.