DocumentCode :
2609873
Title :
Electrical equivalent circuit for frequency dependant impedance: minimum lumped elements for a given precision [SMPS transformer]
Author :
Schellmanns, A. ; Keradec, J.-P. ; Schanen, J.L.
Author_Institution :
Lab. Micro-Electron. de Puissance, STMicroelectronic, Tours, France
Volume :
5
fYear :
2000
fDate :
2000
Firstpage :
3105
Abstract :
At high frequency, due to the skin and proximity effects, the inductance and resistance of wound components become frequency dependent: impedances proportional to the square root of frequency are often encountered. Such behaviour is tricky to represent accurately by an electrical equivalent circuit. This well-known problem is referenced as “half order system” representation. In this paper, it is shown how to design a circuit, made of constant resistances and inductances, which behaves as the leakage inductor of an SMPS transformer. Attention is paid to minimise the component number, necessary to reach a given accuracy and a given frequency range
Keywords :
electric resistance; equivalent circuits; inductance; lumped parameter networks; power transformers; skin effect; switched mode power supplies; transformer windings; SMPS transformer; electrical equivalent circuit; frequency dependent impedance; half order system representation; inductance; leakage inductor; minimum lumped elements; proximity effect; resistance; skin effect; wound components; Electric resistance; Equivalent circuits; Frequency dependence; Impedance; Inductance; Inductors; Proximity effect; Skin; Switched-mode power supply; Wounds;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
ISSN :
0197-2618
Print_ISBN :
0-7803-6401-5
Type :
conf
DOI :
10.1109/IAS.2000.882609
Filename :
882609
Link To Document :
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