Process for producing a squirrel-cage rotor

Details Process for producing a squirrel-cage rotor Process for producing a squirrel-cage rotor

1988-09-19

1989-10-10

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

310211, 310212, 310 77, H02K 1502

Patent

active

048722561

ABSTRACT:
The object of the process is to obtain an intermediate short-circuiting ring in a squirrel cage rotor by filling. It makes use of the technique consisting in automatically cutting out and assembling rotor laminations by means of a follow-on machine in which the laminations are cut out from a strip, rotated through a determined angle and provided with half-cutouts for their assembly in a packet. The process consists in eliminating at least one tooth in every two from the laminations whose position in the packet corresponds to the situation of the intermediate short-circuiting ring, and turning these laminations through an angle such that when filling is effected a continuous annular zone of nonmagnetic material is obtained.

REFERENCES:
patent: 3965380 (1976-06-01), Stepina
patent: 4445272 (1984-05-01), Bruhn et al.
patent: 4720647 (1988-01-01), Plumer
patent: 4738620 (1988-04-01), Neuenschwander
Iguchi, Nobuaki, "Progressive Lamination Die with Automatic Stacking Device (Fastec.RTM. System)" in International Forum '85 on Die and Mold, pp. 1-12.

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