Flat transformer and power supply unit having flat transformer
First Claim
1. A flat transformer, comprising a coil body formed by plural conductors, wherein:
- each of said plural conductors is coated by an insulating material;
said coil body is formed as a spiral winding of plural conductors;
a part of said plural conductors form a primary winding of the flat transformer, and the remainder of said plural conductors form a secondary winding of the flat transformer; and
each of said plural conductors of said secondary winding contacts at least one of said plural conductors of said primary winding.
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Accused Products
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.
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Citations
35 Claims
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1. A flat transformer, comprising a coil body formed by plural conductors, wherein:
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each of said plural conductors is coated by an insulating material; said coil body is formed as a spiral winding of plural conductors; a part of said plural conductors form a primary winding of the flat transformer, and the remainder of said plural conductors form a secondary winding of the flat transformer; and each of said plural conductors of said secondary winding contacts at least one of said plural conductors of said primary winding. - View Dependent Claims (12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 26, 27)
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2. A flat transformer, comprising plural coil bodies, each coil body formed by plural conductors, wherein:
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each of said plural conductors is coated by an insulating material; each of said plural coil bodies is formed as a spiral winding of plural conductors disposed in a respective plane; a part of said plural coil bodies form a primary winding of the flat transformer, and the remainder of said plural coil bodies form a secondary winding of the flat transformer; and each of said plural conductors of said secondary winding contacts at least one of said plural conductors of said primary winding. - View Dependent Claims (28, 29)
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3. A flat transformer, comprising plural coil bodies, each coil body formed by plural conductors, wherein:
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each of said plural conductors is coated by an insulating material; each of said plural coil bodies is formed as a spiral winding of plural conductors disposed in a respective plane; a part of said plural conductors form a primary winding of the flat transformer, and the remainder of said plural conductors form a secondary winding of the flat transformer; and each of said plural conductors of said secondary winding contacts at least one of said plural conductors of said primary winding. - View Dependent Claims (4, 5, 6, 7, 8, 30, 31, 34, 35)
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9. A flat transformer, comprising a first coil body formed by a complex conductor, wherein:
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said complex conductor comprises at least one central insulated conductor and at least one peripheral insulated conductor wound concentrically and spirally on said at least one central insulated conductor; said first coil body is formed as a spiral winding of said complex insulated conductor; and said at least one central insulated conductor forms a primary winding of said flat transformer, and said at least one peripheral insulated conductor forms at least one secondary winding of said flat transformer. - View Dependent Claims (10, 11, 15)
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23. A flat transformer, comprising a coil body formed by plural conductors, wherein:
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each of said plural conductors is coated by an insulating material; said coil body is formed as a spiral winding of said plural conductors; a part of said plural conductors form a primary winding of the flat transformer, and the remainder of said plural conductors form a secondary winding of the flat transformer; the conductors of said primary winding and the conductors of said secondary winding are intermixed with each other, with each conductor of said secondary winding contacting at least one conductor of said primary winding. - View Dependent Claims (32, 33)
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24. A flat transformer, comprising a coil body formed by plural conductors, wherein:
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each of said plural conductors is coated by an insulating material; said coil body is formed as a spiral winding of said plural conductors; a part of said plural conductors form a primary winding of the flat transformer, and the remainder of said plural conductors form a secondary winding of the flat transformer; each conductor of said secondary winding contacts at least one conductor of said primary winding; and said flat transformer has a magnetic coupling efficiency which abruptly increases at frequencies above 100 KHz.
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25. A flat transformer, comprising a coil body formed by plural conductors, wherein:
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each of said plural conductors is coated by an insulating material; said coil body is formed as a spiral winding of said plural conductors; a part of said plural conductors form a primary winding of the flat transformer, and the remainder of said plural conductors form a secondary winding of the flat transformer; each conductor of said secondary winding contacts at least one conductor of said primary winding; and said flat transformer has a magnetic coupling efficiency of nearly about 100% at frequencies exceeding 100 KHz.
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Specification