Title :
Modeling Litz-wire winding losses in high-frequency power inductors
Author :
Bartoli, Massimo ; Noferi, Nicola ; Reatti, Alberto ; Kazimierczuk, Marian K.
Author_Institution :
Dept. of Electron. Eng., Florence Univ., Italy
Abstract :
The parasitic effects in stranded, twisted, and Litz wire windings operating at high frequencies are studied. The skin and proximity effects that cause the winding parasitic resistance of an inductor to increase with the operating frequency are considered. An expression for the AC resistance as a function of the operating frequency is given. The measured and calculated values of the inductor AC resistance and quality factor are plotted versus frequency and compared. The theoretical results were in good agreement with those experimentally measured
Keywords :
Q-factor; electric resistance; inductors; losses; power inductors; skin effect; windings; AC resistance; Litz-wire winding losses; high-frequency power inductors; modelling; operating frequency; parasitic effects; proximity effect; quality factor; skin effect; Circuits; Conductors; Electrical resistance measurement; Frequency; Inductors; Magnetic materials; Power engineering and energy; Skin; Solids; Wire;
Conference_Titel :
Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE
Conference_Location :
Baveno
Print_ISBN :
0-7803-3500-7
DOI :
10.1109/PESC.1996.548808
