Title :
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
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;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2014 IEEE
Conference_Location :
Pittsburgh, PA
DOI :
10.1109/ECCE.2014.6954118
