Minimal-length windings for reduction of copper power losses in magnetic elements
First Claim
1. A method to minimize copper losses in magnetics of at least one winding turn, the method comprising the minimization of the length of the said at least one turn by winding a continuous copper foil of a specific geometrical design at least one turn over a ferromagnetic core with the surface of the foil parallel to the surface of the core, so as to achieve a winding turn-length quasi-equal to the length of the core cross-section perimeter, effectively surrounding the entire cross-sectional area of the ferromagnetic core.
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Abstract
The present invention discloses means for reducing copper power losses in windings of magnetic elements by minimizing their length. This is achieved by winding a continuous copper foil of a specific geometrical design at least one turn over a ferromagnetic core with the surface of the foil parallel to the surface of the core The transformer may have high or low turn ratios, may also use winding coil formers to achieve proper creepage and clearance and may use a compressible, thermally conductive pad for facilitating heat dissipation.
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Citations
19 Claims
- 1. A method to minimize copper losses in magnetics of at least one winding turn, the method comprising the minimization of the length of the said at least one turn by winding a continuous copper foil of a specific geometrical design at least one turn over a ferromagnetic core with the surface of the foil parallel to the surface of the core, so as to achieve a winding turn-length quasi-equal to the length of the core cross-section perimeter, effectively surrounding the entire cross-sectional area of the ferromagnetic core.
- 7. A magnetics winding comprising at least one winding turn that, for a given magnetics core volume, features a minimized length obtained by winding a continuous copper foil of a specific geometrical design at least one turn around a ferromagnetic core to achieve a winding turn-length quasi-equal to the length of the core cross-section perimeter, thus effectively surrounding the entire cross-sectional area of the ferromagnetic core.
- 13. A transformer comprising a secondary winding with at least one winding turn that features reduced copper losses by minimizing the said at least one turn length by winding a continuous copper foil of a specific geometrical design at least one turn over a ferromagnetic core with the surface of the foil parallel to the surface of the core, so as to achieve a winding turn-length quasi-equal to the length of the core cross-section perimeter, thus effectively surrounding the entire cross-sectional area of the ferromagnetic core.
Specification