Title :
Optimal choice for number of strands in a litz-wire transformer winding
Author :
Sullivan, Charles R.
Author_Institution :
Thayer Sch. of Eng., Dartmouth Coll., Hanover, NH, USA
Abstract :
The number of strands to minimize loss in a litz-wire transformer winding is determined. With fine stranding, the AC resistance factor decreases, but DC resistance increases because insulation occupies more of the window area. A power law to model insulation thickness is combined with standard analysis of proximity-effect losses
Keywords :
electric resistance; high-frequency transformers; insulated wires; losses; skin effect; transformer windings; AC resistance factor; DC resistance; fine stranding; high frequency transformer; insulation thickness model; litz-wire transformer winding; loss minimization; optimal strands choice; power law; proximity-effect losses; skin effect; standard analysis; Conductors; Core loss; Design optimization; Educational institutions; Magnetics; Power transformer insulation; Skin; Temperature; Windings; Wire;
Conference_Titel :
Power Electronics Specialists Conference, 1997. PESC '97 Record., 28th Annual IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-3840-5
DOI :
10.1109/PESC.1997.616632
