Method of making rotor coil of coreless motor

Details Method of making rotor coil of coreless motor Method of making rotor coil of coreless motor

1978-05-11

1980-12-02

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

72401, 72DIG2, H02K 1502

Patent

active

042362954

ABSTRACT:
A method of making cylindrical rotor coil for use in coreless motors is provided whereby the coil is of a reduced thickness with compressed coil turns enabling the stator magnetic gap distance to be reduced, thus enabling a higher flux density to be utilized highly efficiently in the gap. A force is applied to a cylindrically wound coil of an insulation coated wire so as to act in its radial directions and against at least one of the inner and outer peripheries of the cylindrical coil, whereby respective turns of the wire are compressed together and flattened on the plane defining the respective peripheries. The force application is preferably repeated while varying the relative position of the cylindrical coil in its peripheral directions to the applied force.

REFERENCES:
patent: 1041293 (1912-10-01), Keller
patent: 3348183 (1967-10-01), Hodges et al.
patent: 4048713 (1977-09-01), Hvass
patent: 4099077 (1978-07-01), Maekawa

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