Back to results
US 4,060,784 AGranted
Electrical inductive apparatus
AssigneeA/S National Industri
InventorPetter I. Fergestad
Life of this patent
Estimating the term…
Abstract
An electrical winding for electrical inductive apparatus such as a transformer or electrical reactor having at least one winding formed of non-magnetic, electrically conductive sheet, strip or foil, such as copper or aluminum. Magnetically conductive material is disposed between at least certain of the turns of the electrically conductive sheet material to create a low reluctance path for magnetic leakage flux parallel to the winding axis to reduce the magnitude of the radial component of the leakage flux.
Claims14
An electrical inductive apparatus comprising:
- a magnetic core,
- an electrical winding disposed in inductive relation around said core, said winding including a plurality of layers of non-magnetic, electrically conductive sheet material wound about a predetermined axis to provide a structure having first and second axial ends,
- electrical terminals connected to said sheet material adapted for connection to a source of electrical potential,
- a first magnetically conductive means disposed between at least certain of the layers of said conductive sheet material to provide a low reluctance path for magnetic flux in a direction parallel with said predetermined axis,
- and a second magnetically conductive means, disposed between said first magnetically conductive means and said core, for providing a return path for said magnetic flux to said core.
2 more elements
An electrical winding, comprising:
- a plurality of layers of non-magnetic, electrically conductive sheet material wound about a predetermined axis to provide a structure having first and second axial ends,
- electrical terminals connected to said sheet material adapted for connection to a source of electrical potential,
- and magnetically conductive means disposed between at least certain of the layers of said conductive sheet material to provide a low reluctance path for magnetic flux in a direction parallel with said predetermined axis, said magnetically conductive means being electrically connected in parallel with said sheet material, to cause said magnetically conductive means to conduct a portion of the electrical current flowing between the terminals, as well as magnetic flux.
Dependencies are inferred from the claim text.