Rotor for a dynamo-electric machine and method of making same

Details Rotor for a dynamo-electric machine and method of making same Rotor for a dynamo-electric machine and method of making same

1983-10-28

1985-11-19

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Electrical device making

310 43, 310266, H02K 1510

Patent

active

045533202

ABSTRACT:
A method of making a rotor, for a dynamo-electric machine, which has a number of arcuately formed rectangular loop coils arranged edgewise in a cylindrical configuration, employs injection moulding. Moulding material is injected between adjacent coils and penetrates between and around them to form an encapsulating framework. Entry of moulding material into the central apertures of the coils is prevented by inserts. By directing the moulding material inwardly, and spacing the coils slightly from the mould core, encapsulant also penetrates behind the coil faces to form a thin skin. By use of a shutter member, which may be an integral end cap, coil terminations can be led out of the mould cavity through apertures in the shutter to protect them from damage during the moulding process.

REFERENCES:
patent: 3084418 (1963-04-01), Procorio
patent: 3426223 (1969-02-01), Vaughan
patent: 3600801 (1971-08-01), Larsen et al.
patent: 4107587 (1975-09-01), Ban et al.
patent: 4398167 (1982-09-01), Dickie et al.

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