Transformer or inductor containing a magnetic core having...

Details Transformer or inductor containing a magnetic core having... Transformer or inductor containing a magnetic core having...

2006-11-14

2006-11-14

Nguyen, Tuyen T (Department: 2832)

Inductor devices

Core forms casing

C336S212000

Reexamination Certificate

active

07135949

ABSTRACT:
An inductor or transformer for mounting on a PCB has a two-part magnetic core structure and at least one coil wound on a bobbin. Each core part has a backwall and an abbreviated outer skirt extending from the backwall and an asymmetric center core element extending from the backwall in the same direction as the outer skirt along a longitudinal axis parallel with the mounting plane and including the centroid of the center core element. The center core element is asymmetric relative to a dividing plane parallel with the mounting plane and including the longitudinal axis, such that a greater portion of the center core element lies on a side of the dividing plane than on an opposite side of the dividing plane. In one preferred form, the center core element has a cross-sectional shape resembling a “D” character turned on its side, or “lazy D” shape.

REFERENCES:
patent: 3371301 (1968-02-01), Hisano
patent: 4760366 (1988-07-01), Mitsui
patent: 5489884 (1996-02-01), Heringer et al.
patent: 5886610 (1999-03-01), Canova
patent: 6483412 (2002-11-01), Holdahl et al.
patent: 6501362 (2002-12-01), Hoffman et al.
patent: 6696913 (2004-02-01), Meuche et al.
patent: 6897754 (2005-05-01), Jeong et al.
patent: 7078995 (2006-07-01), Hoffman et al.

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