Design and evaluation of the constant-flux inductor with enclosed-winding

Author

Han Cui ; Ngo, Khai D. T. ; Moss, Jim ; Lim, Michele ; Rey, Ernesto

Author_Institution

Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

5229

Lastpage

5236

Abstract

The “constant-flux” concept introduced recently is leveraged to distribute magnetic flux to improve energy density, lowering the profile of an inductor. The optimal flux distribution with normalized parameters is identified mathematically, and verified by simulation. It is then applied to reduce the dc resistance of a commercial inductor by a factor of two, keeping the outer dimensions and inductance the same. Thermal-limited current rating is improved by 50%, whereas saturation-limited current rating is improved by 20% thanks to the suppression of flux crowding. The simulation result is verified by measurement results of a prototype under high current bias.

Keywords

inductors; magnetic flux; transformer windings; constant flux inductor; enclosed winding; energy density; flux crowding; high current bias; magnetic flux; normalized parameters; optimal flux distribution; thermal limited current rating; Equations; Inductance; Inductors; Magnetic cores; Mathematical model; Resistance; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6954118

Filename

6954118