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US 7,443,278 B2Granted
Coil device, composite coil device, and transformer device
AssigneeSumida Corporation
InventorsYoshio Kawahata, Tomoyuki Kanno, Naoki Sasaki
Life of this patent
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AssigneeSumida Corporation
InventorsYoshio Kawahata, Tomoyuki Kanno, Naoki Sasaki
Estimating the term…
A transformer-type compact and thin coil device having a high coupling degree between a primary coil and a secondary coil, and a transformer device in which a plurality of sets of the transformer-type coil devices are incorporated. A coil device includes a first winding portion in which a primary and secondary coil wires are wound in bifilar form so as to arrange them alternately in a plane, a second winding portion in which a secondary coil wire is wound to arrange it in a plane parallel to the plane of the first winding portion, and a secondary coil connecting portion which connects an inner diameter portions of the secondary coil wires of the first and second winding portions. A transformer device is formed by incorporating a plurality of sets of the transformer-type coil devices each formed in above manner.
A coil device comprising:
A composite coil device comprising a first coil device including a primary coil and a secondary coil, and a second coil device including a primary coil and a secondary coil, said first coil device and said second coil device being overlaid in a plane, at least said first coil device comprises:
A transformer device comprising an upper core portion, a lower core portion, a first coil device including a primary coil and a secondary coil, and a second coil device including a first coil and a second coil, said first coil device and said second coil device being overlaid in a plane and arranged between said upper core portion and said lower core portion, at least said first coil device comprises:
Dependencies are inferred from the claim text.