Sintered transformer core of MnZn-ferrite and a transformer comp

Details Sintered transformer core of MnZn-ferrite and a transformer comp Sintered transformer core of MnZn-ferrite and a transformer comp

1991-06-04

1992-08-11

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

252 6254, 336233, 363 20, H01F 27255, H02M 748

Patent

active

051385465

ABSTRACT:
The invention relates to a sintered transformer core of MnZn-ferrite material, the initial permeability of which ranges between 10 and 1000. Said transformer cores preferably have an average particle size which ranges between 0.05 and 2.0 .mu.m. The transformer cores according to the invention exhibit surprisingly low overall losses when operating in the frequency range of 2 MHz and higher. Such transformer cores can be very advantageously used in transformers operated in said frequency range, such as SMPS transformers.

REFERENCES:
patent: 4502982 (1985-03-01), Horie et al.
patent: 4943793 (1990-07-01), Ngo et al.
Agajanian et al, "High Frequency Mn-Zn Ferrites and Method of Their Preparation", IBM Tech. Discl. Bul., vol. 10, No. 5, p. 619, Oct. 1967.

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