Title :
Improved winding design for planar inductors
Author :
Ye, Liming ; Skutt, Glenn R. ; Wolf, Ronald ; Lee, Fred C.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
This paper examines design issues in low-profile inductors carrying high AC ripple current as well as large direct current for use in a 60 W power factor correcting power converter. Specifically, the effect of air gaps in the core structure on multilayer flex circuit (MFC) planar winding losses is examined. Some design guidelines for the construction of planar MFC windings that meet the desired goals of high power density and high efficiency are explored. The use of a flux “keep-away” region for the conductors of a planar winding design is modeled numerically. Experimental measurements of two MFC winding prototypes confirm the results of the numerical modeling
Keywords :
air gaps; inductors; magnetic cores; magnetic flux; magnetic multilayers; power convertors; power factor correction; power inductors; windings; 60 W; AC ripple current; air gaps; core structure; design guidelines; efficiency; experimental measurements; flux keep-away region; low-profile inductors; multilayer flex circuit; numerical modelling; planar inductors; planar winding losses; power density; power factor correcting power converter; winding design improvement; Air gaps; Core loss; Flexible electronics; Flexible printed circuits; Inductors; Magnetic cores; Magnetic flux; Magnetic materials; Power electronics; Thermal stresses;
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.1997.618069
