Is a
Patent attributes
Patent Applicant
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tomoyuki Ichikawa0
Date of Patent
April 12, 2005
0Patent Application Number
104204390
Date Filed
April 22, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A transformer is provided with a coil portion containing primary windings and a secondary winding. Cores sandwich the coil portion. Each of these windings includes a toroidal-shaped portion that is formed by winding flat type wires in a toroidal shape and by overlapping these flat type wires. Edge portions of this flat type wire are derived from the toroidal-shaped portion respectively. A plurality of windings and the cores are arranged along an overlapping direction of the flat type wires. employed, By this structure, a copper loss caused by the skin effect can be reduced and the electromagnetic coupling conditions between the windings can be improved.
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