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US 5,294,855 AGranted
Electromotive device
AssigneeFaraday Energy Foundation
InventorEmil S. Mihalko
Life of this patent
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AssigneeFaraday Energy Foundation
InventorEmil S. Mihalko
Estimating the term…
A method for making a wound field for an electric motor, generator or alternator includes the steps continuously winding an insulated conductor into a coil, having a first plurality of windings wound in a first direction, and a second plurality of windings wound in a second direction opposite the first direction; flattening the coil into a two-layered flat web, and rolling the flat, two-layered web end-to-end into a cylindrical configuration. In one embodiment, a multiphase wound field can be made by winding a plurality of insulated conductors about a common axis to form a group of adjacent coil units. After the first group of coil units is wound, second and subsequent groups can be wound, in alternating directions of winding with respect to the first group, to form an elongate winding assembly. The entire assembly, is then flattened and rolled end-to-end. This create a wound field that is ready for insertion into a magnetic return path of an electric motor which has a higher density than was previously possible. As a result, current loss due to hysteresis and other features is materially reduced.
An electric motor, generator of alternator comprising:
An electrically powered tool for performing work on a work piece, comprising:
A multiphase wound field for use as a slotless stator in an electric motor, generator or alternator, comprising:
A wound field for a multiphase electric motor, generator or alternator, said wound field comprising at least two continuous insulated conductors, each of said insulated conductors forming one of a first like number of adjacent coil units wound in a first direction, each of said conductors also forming one of a second like number of adjacent coil units wound in a second direction opposite the first direction, each of said coil units having a first peripheral segment and a second peripheral segment diametrically-opposite the first peripheral segment thereof, the coil units being oriented such that the first peripheral segment of a coil unit wound in the first direction overlies the second peripheral segment of a coil unit wound in a second direction, and the first peripheral segment of a coil unit wound in the second direction overlies the second peripheral segment of a coil unit wound in the first direction.
Dependencies are inferred from the claim text.