Rotors and methods of manufacturing such rotors

Electrical generator or motor structure – Dynamoelectric – Rotary

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Details

310211, 310216, H02K 1716, H02K 122

Patent

active

059905956

ABSTRACT:
Rotors and methods of assembling such rotors for electric motors are described. In one embodiment, the rotor includes a substantially cylindrical core having substantially planar first and second end surfaces and a substantially cylindrical body portion. The rotor core body portion has first, second and third body sections. The first body section has an outer diameter less than an outer diameter of the second body section, and the third body section has an outer diameter approximately about equal to the outer diameter of the first body section. The first and third body sections sometimes are referred to as end sections or core extensions. A plurality of radially arranged rotor bar slots extend through the body portion, and a plurality of rotor bars are cast in the rotor bar slots. The rotor bar slots in the end sections have a first geometric cross-sectional shape and the rotor bar slots in the second body section have a second geometric cross-sectional shape. The rotor bar slot geometry in the end sections is selected to allow outward displacement of the rotor bars in the radial direction.

REFERENCES:
patent: 2944171 (1960-07-01), Alger
patent: 2956186 (1960-10-01), Wall
patent: 3083313 (1963-03-01), Boles
patent: 3213306 (1965-10-01), Summers et al.
patent: 3237033 (1966-02-01), Glass et al.
patent: 3597646 (1971-08-01), Lawrenson
patent: 4499660 (1985-02-01), Lenz
patent: 5049771 (1991-09-01), Challita et al.
patent: 5182483 (1993-01-01), Hibino et al.
patent: 5191309 (1993-03-01), Laros
patent: 5498918 (1996-03-01), Weihrauch

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