Transformer
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United States of America Patent
Stats
-
N/A
Issued Date -
Nov 2, 2006
app pub date -
Apr 25, 2006
filing date -
Apr 28, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A transformer is provided in which leakage inductance and electromagnetic noise can be reduced without making the transformer larger. This transformer includes a primary winding, a secondary winding and a feedback winding, in which: each winding is wound onto a bobbin so that four winding layers are separately piled in the radius directions of the bobbin's shaft portion; the primary winding is formed by the innermost winding layer and the forth winding layer from the inside; the secondary winding is formed by the second winding layer from the inside; the feedback winding is formed by the third winding layer from the inside; and the feedback winding is wound substantially with no clearance from a position adjacent to one flange portion of the bobbin to a position adjacent to the other flange portion of the bobbin.
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