DC transformer with an output inductance integrated on a...

Details DC transformer with an output inductance integrated on a... DC transformer with an output inductance integrated on a...

2008-05-20

2008-05-20

Nguyen, Tuyen T. (Department: 2832)

Inductor devices

With closed core interrupted by an air gap

Reexamination Certificate

active

07375607

ABSTRACT:
A DC/DC converter includes an input filter, a half-bridge converter without PWM (Pulse Width Modulation) control function, a synchronous rectifier, an output capacitor, and a DC transformer. The DC transformer includes a magnetic core, a primary winding, a first secondary winding, and a second secondary winding. The magnetic core of the DC transformer includes a first leg, a second leg having a first air gap, and a third leg having a second air gap. The first secondary winding is wound on the first leg and the second leg, and induces a first inductance by the first air gap. The second secondary winding is wound on the first leg and the third leg, and induces a second inductance by the second air gap.

REFERENCES:
patent: 2173905 (1939-09-01), Kalbskopf
patent: 2513512 (1950-07-01), Olthof
patent: 4055740 (1977-10-01), Nakamura et al.
patent: 5172308 (1992-12-01), Tohya
patent: 5355296 (1994-10-01), Kuo et al.
patent: 5555494 (1996-09-01), Morris
patent: 5920473 (1999-07-01), Sturgeon
patent: 7136293 (2006-11-01), Petkov et al.
patent: WO 2004/040600 (2004-05-01), None

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