Method of fabricating rotor coil for coreless motors

Details Method of fabricating rotor coil for coreless motors Method of fabricating rotor coil for coreless motors

1977-06-29

1978-09-05

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29628, 310 42, H02K 1502

Patent

active

041109015

ABSTRACT:
A method of fabricating cylindrical rotor coil for use in coreless motors is provided, wherein coated insulation film on coil wire at a plurality of positions to be located at an axial end edge of the rotor coil cylindrically wound is removed for connection with commutator segments during winding operation of the wire into cylindrical shape. The winding operation is preferably intermittently interrupted for performing the insulation film removal. Advantageously, the removal is performed by dipping the particular positions into a molten state solder, whereby the film is thermally fused and removed and exposed conductor parts are simultaneously coated with the solder. The film may be removed, alternatively, by means of high frequency induction heat or high voltage discharge arc.

REFERENCES:
patent: 3995364 (1976-12-01), Kristiansen

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