Method of making self-supporting rotor coil dc-machine

Details Method of making self-supporting rotor coil dc-machine Method of making self-supporting rotor coil dc-machine

1979-08-02

1981-09-29

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29605, 310266, H02K 1502

Patent

active

042914574

ABSTRACT:
A cylindrical, ironless, self-supporting rotor coil for use in an electrical dc-machine is disclosed. The coil is formed by at least one layer of wire in which the wire is at least in part placed in an oblique direction with respect to the generatrixes of the cylindrical rotor surface. The wire comprises a central core, an insulating layer and an outer layer of a supporting material capable of being softened during or after winding and subsequently solidified. The coil is made with a final winding pitch such that the insulating layers of adjacent wire parts are at least nearly in contact, the supporting material filling the remaining spaces between the insulating layers.

REFERENCES:
patent: 3412354 (1968-11-01), Sattler
patent: 4048713 (1977-09-01), Hvass
patent: 4110901 (1978-09-01), Nakamura et al.

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