Inductor devices – Coils of special configuration – Planar type
Patent
1993-10-27
1996-03-26
Thomas, Laura
Inductor devices
Coils of special configuration
Planar type
336225, 336198, H01F 2728
Patent
active
055024300
ABSTRACT:
A flat transformer has a coil body. The coil body is formed by winding plural insulated conductive wires. Each of the plural insulated conductive wires has a conductor having a circular shaped cross-section, and an outer peripheral portion of the conductor is coated by an insulating coating. A part of plural insulated conductive wires is used to form a primary winding and the remainder of the plural insulated conductive wires is used to form a secondary winding. A flat transformer may also have plural coil bodies. The plural coil bodies may be wound at plural stages. A part of the plural coil bodies is may be used to form a primary winding and the remainder of plural coil bodies may be used to form a secondary winding. The flat transformer can operate stably at a high frequency with a small loss.
REFERENCES:
patent: 2064771 (1936-12-01), Vogt
patent: 2847651 (1958-08-01), Schamanek
patent: 3458650 (1969-07-01), Miyawaki
patent: 3611233 (1969-08-01), Haldeman, Jr.
patent: 4785345 (1988-11-01), Rawls et al.
patent: 5175525 (1992-12-01), Smith
patent: 5359313 (1994-10-01), Watanabe et al.
Hagiwara Syuya
Horie Hideaki
Kanouda Akihiko
Onda Kenichi
Saito Sadamu
Hitachi , Ltd.
Thomas Laura
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