Squirrel-cage rotor for high-speed induction motor

Details Squirrel-cage rotor for high-speed induction motor Squirrel-cage rotor for high-speed induction motor

1994-05-16

1995-08-22

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310 45, 310201, 310261, 310270, 29598, H02K 1716

Patent

active

054443199

ABSTRACT:
A squirrel-cage rotor (10) includes a laminated core (14) fixed to a rotor shaft (12), a plurality of secondary conductors (18) arranged respectively in a plurality of through holes (16) formed through the laminated core (14), a pair of end rings (20) connected to the secondary conductors (18) at axial ends of the laminated core (14), and a pair of reinforcing members (22, 23) respectively covering the end rings (20). The secondary conductors (18) and the end rings (20) are integrally formed through a casting process, and are connected with the laminated core (14) and the reinforcing members (22, 23). Each reinforcing member (22, 23) is formed as an annular element of high-rigidity material, and includes a cylindrical wall (26, 27) surrounding the cylindrical outer surface of the end ring (20), a multi-aperture wall (28, 29) provided with a plurality of apertures (32) which communicate respectively with the through holes (16) of the laminated core (14 ) and held between the end ring (20) and the laminated core (14), and an end wall (30, 31) brought into contact with the axial outer surface of the end ring (20).

REFERENCES:
patent: 1823337 (1931-09-01), Sheely
patent: 2196059 (1940-04-01), Cox
patent: 3936685 (1976-02-01), Glockner et al.
patent: 4309635 (1982-01-01), Sei et al.
patent: 5341058 (1994-08-01), Kohler et al.

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