Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
1994-05-02
2003-06-17
Arbes, Carl J. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S602100, C336S192000, C336S210000
Reexamination Certificate
active
06578253
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates generally to power converters, and more particularly to switched-mode power converters using matrix transformers and inductors.
The matrix transformer is described in U.S. Pat. No. 4,665,357 issued May 12, 1987 U.S. Pat. No. 4,85,606, issue Jul. 4, 1989, U.S. Pat. No. 4,942,353 issued Jul. 17, 1990, U.S. Pat. No. 4,978,906 issued Dec. 18, 1990 and U.S. Pat. 5,093,646 issued Mar. 3, 1992, all assigned to the same assignee as the present invention, and the disclosures of which are all incorporated herein by reference.
This invention teaches improved matrix transformer and inductor modules having improved ruggedness, and more precise location of their terminations.
SUMMARY OF THE INVENTION
The modules of the present invention use ferrite cores which are sturdy and have well defined dimensions. The terminations of the modules are bonded to the cores to provide ruggedness and dimensional stability to the terminations.
The modules may have square holes for pre-wired windings. In one embodiment, the top and bottom surfaces, respectively, are the terminations of the module.
REFERENCES:
patent: 2529653 (1950-11-01), Epstein
patent: 3188592 (1965-06-01), Kukla
patent: 3387245 (1968-06-01), Czernobil
patent: 3474371 (1969-10-01), Miller
patent: 3479563 (1969-11-01), Roy
patent: 4769900 (1988-09-01), Morinaga et al.
patent: 4804340 (1989-02-01), Hamer et al.
patent: 285678 (1966-09-01), None
patent: 621987 (1935-11-01), None
patent: 0220506 (1988-09-01), None
Arbes Carl J.
FMTT, Inc.
Lawson & Persson P.C.
Persson Michael J.
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