Power inductor and transformer with low acoustic noise air gap

Details Power inductor and transformer with low acoustic noise air gap Power inductor and transformer with low acoustic noise air gap

H - Electricity

01

F

336/25

H01F 27/33 (2006.01) H01F 27/255 (2006.01) H01F 27/26 (2006.01)

Patent

CA 1085473

ABSTRACT OF THE DISCLOSURE A ferrite magnetic core includes a one-piece rectangular outer member with aligned circular apertures in which the ends of a cylindrical center member are retained to thus establish a radial air gap. Radial magnetic forces acting on the core members are summed to zero to theoretically eliminate movement and result in low acoustic noise in high operating frequency power inductors and transformers. A magnetic bridge is added to reduce air gap fringing flux outside the core. Other modifications and a "C" core configuration are described.

277770

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