High frequency circuit having a transformer with controlled inte

Details High frequency circuit having a transformer with controlled inte High frequency circuit having a transformer with controlled inte

1995-09-07

1996-08-13

Sterrett, Jeffrey L.

Inductor devices

With electric and/or magnetic shielding means

336212, 336219, H01F 1504

Patent

active

055460658

ABSTRACT:
A transformer in which a magnetic medium provides flux paths within the medium, two or more windings enclose the flux paths at separated locations along the paths, and an electrically conductive medium, arranged in the vicinity of the magnetic medium and the windings, defines a boundary within which flux emanation from the magnetic medium and the windings is confined and suppressed. In a transformer constructed in accordance with the present invention, both controlled values of leakage inductance and the benefits of separated windings can be achieved. The conductive medium can be configured to reduce the leakage inductance of a controlled-leakage inductance transformer (e.g. for use in a zero-current switching power converter), having separately located windings, by at least 25%, and can be configured to reduce the leakage inductance of a low-leakage inductance transformer (e.g. for use in a PWM power converter), having separately located windings, by at least 75%.

REFERENCES:
patent: 2911604 (1959-11-01), Krause
patent: 2939096 (1960-05-01), Gordon
patent: 3010185 (1961-11-01), Hume
patent: 3032729 (1962-05-01), Fluegel
patent: 3063135 (1962-11-01), Clark
patent: 3123787 (1964-03-01), Shifrin
patent: 3149296 (1964-09-01), Cox
patent: 3154840 (1964-11-01), Shahbender
patent: 3336662 (1967-08-01), Howland et al.
patent: 3522509 (1970-08-01), Hasenbalg
patent: 3675176 (1972-07-01), Brown
patent: 3827018 (1974-07-01), Thomas et al.
patent: 3851287 (1974-11-01), Miller et al.
patent: 4145591 (1979-03-01), Takeda
patent: 4156862 (1979-05-01), Hansen et al.
patent: 4259654 (1981-03-01), Persson
patent: 4415959 (1983-11-01), Vinciarelli
patent: 4460884 (1984-07-01), Post et al.
patent: 4464544 (1984-08-01), Klein
patent: 4484171 (1984-11-01), McLoughlin
patent: 4550364 (1985-10-01), Shaw
Holtje et al., "A High-Precision Impedance Comparator", General Radio Experimenter, vol. 30, No. 11, Apr., 1965. pp. 1-12.
Ing et al., "Very-Wide Band Radio-Frequency Transformers", Wireless Engineer, Jun., 1947, pp. 168-177.
Japanese Patent Abstract No. JP1154504, Jun. 16, 1989.
Japanese Patent Abstract No. JP58058713, Apr. 7, 1983.
Japanese Patent Abstract No. JP61224308, Oct. 6, 1986.
Crepaz et al., "The Reduction of the External Electromagnetic Field Produced by Reactors and Inductors for Power Electronics", ICEM, 1986.
Miyoshi and Omori, "Reduction of Magnetic Flux Leakage from an Induction Heating Range", IEE Transactions on Industry Applications, vol. 1a-19, No. 4, Jul./Aug. 1983.

Affiliated with

Also associated with

Rating

High frequency circuit having a transformer with controlled inte does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High frequency circuit having a transformer with controlled inte, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High frequency circuit having a transformer with controlled inte will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1051456