Title :
Fine grained ferrite for low profile transformer
Author :
Yamamoto, Y. ; Makino, A. ; Yamaguchi, T. ; Sasada, I.
Author_Institution :
Central Res. Lab., Alps Electr. Co. Ltd., Nagaoka, Japan
fDate :
9/1/1997 12:00:00 AM
Abstract :
A Mn-Zn ferrite with fine grain size and low core loss at 0.5 to 2 MHz was developed, and a conductor-embedded-type planar transformer was made using the developed ferrite. The Bm·f value in the loss level of 400 kW m-3 of the developed ferrite at f=1 MHz is 2.2 times larger than that of the commercial ferrite. The efficiency and the output power of the conductor-embedded-type planar transformer were 91% and 1.8 W, respectively
Keywords :
eddy current losses; ferrites; grain size; magnetic leakage; manganese compounds; transformer cores; zinc compounds; 0.5 to 2 MHz; 1.8 W; 91 percent; Mn-Zn ferrite; Mn0.72Zn0.16Fe2.12O4; conductor-embedded-type planar transformer; efficiency; fine grain size; fine grained ferrite; loss level; low core loss; low profile transformer; output power; Conducting materials; Core loss; Extraterrestrial measurements; Ferrites; Grain size; Microstructure; Powders; Power supplies; Switching frequency; Transformer cores;
Journal_Title :
Magnetics, IEEE Transactions on
