Bobbin-wound current sense transformer
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United States of America Patent
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-
Jun 6, 2000
Grant Date -
N/A
app pub date -
Mar 16, 1999
filing date -
Mar 16, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bobbin-wound current sense transformer includes a regular bobbin secondary winding that has a central aperture and a U-shaped staple that also functions as a one turn primary winding. This dual function of the U-shaped staple eliminates the need for a separate primary winding and a separate primary terminal. Magnetic coupling for the primary and secondary windings is provided through a core that has a first and a second member. A primary bobbin flange and a secondary bobbin flange with each having a central aperture provides electrical isolation from the primary winding to the secondary winding and the core. The first and second members of the core are connectable through a central aperture to form a magnetic path linking the bobbin secondary winding and the primary winding. The bobbin flanges are arranged along the central aperture to provide electrical isolation from the primary winding to the secondary winding and the core. The primary winding can have a plurality of U-shaped staples instead of one U-shaped primary terminal.
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