Inductor devices – Core forms casing
Patent
1994-03-24
1998-03-10
Spyrou, Cassandra C.
Inductor devices
Core forms casing
336178, 336200, 336212, H01F 2702, H01F 1706, H01F 500, H01F 2724
Patent
active
057266158
ABSTRACT:
Disclosure is made of an integrated-magnetic apparatus, comprising: winding structure for insulatingly carrying at least two generally flat, laterally offset and spaced apart electrical windings of a power converter around an aperture; a core having a flat exterior face, an interior cavity and an un-gapped core-column that is located within the cavity and that passes through the aperture of the winding structure; flat-sided surface carried by the core and forming an interior chamber that is located adjacent to the flat face of the core and forming a core-column that has a gap and that is located within the chamber; and structure, located around the gapped core-column, for carrying a third electrical winding of the power converter. The first two electrical windings are substantially located within the cavity and are adapted to be transformingly coupled together through the core. The third electrical winding is adapted to be inductively coupled through the gapped core-column to the other electrical windings, and is phased to have the magnetic flux passing through the gapped core-column substantially in the same direction as the magnetic flux passing through the un-gapped core-column and to have substantially the same AC components of flux in the gapped core-column and in the un-gapped core-column.
REFERENCES:
patent: 5010314 (1991-04-01), Estou
patent: 5175525 (1992-12-01), Smith
patent: 5386206 (1995-01-01), Iwatani et al.
"New Common-mode Choke Structure for Switchmode Power Supplies" by West and Dickstein, Powertechnics Magazine, Nov. 1985, p. 29.
"Integrated-Magnetics Design with Flat, Low-Profile Cores" by Cuk et. al., CALTECH Power Electronics Group Publication, 1989, 13 pages.
"Planar Magnetics Simplifies Switchmode Power Supply Design and Construction," by E. Brown, PCIM Magazine, Jul. 1992, pp. 46-52.
Barrera Raymond M.
Gabala James A.
Spyrou Cassandra C.
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