Switched reluctance rotor molded lug

Details Switched reluctance rotor molded lug Switched reluctance rotor molded lug

1994-02-16

1997-02-18

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310261, H02K 524

Patent

active

056043880

ABSTRACT:
A switched reluctance motor (M) comprises a stator assembly (SA) including a stator (S) having a central bore (B) and a plurality of inwardly extending salient teeth (ST). A plurality of stator windings (W) are installed on the stator teeth. A rotor assembly (RA) includes a (R) rotor mounted on a rotor shaft (RS) and installed in the central bore for rotation with respect to the stator assembly. The rotor assembly has a pluralitry of outwardly extending salient teeth (RT) with gaps (G) extending lengthwise of the rotor assembly between adjacent rotor teeth. A noise reducer assembly (10) installed on the rotor assembly reduces the noise produced by the rotor when the motor is operating at normal speeds. The assembly includes a lug (14) made of an electrically non-conducting material inserted in each rotor gap and extending the lengthwise of the rotor assembly. Each lug is hollow with sidewalls (16A, 16B) and an inner endwall (16C) all of whose contours generally form mating contours with the respective sidewalls of the rotor poles and the contour of the rotor at the inner end of a gap. An outer endwall (16D) of a lug has a curved contour the curvature of which generally corresponds to the curvature of the outer face of the rotor poles. The lugs produce a surface between the outer faces of the adjacent rotor poles which generally conforms to the outer surface (F) of the rotor poles for the outer surface of the rotor assembly to be generally uniform thereabout. This helps reduce motor noise. The assembly also includes a cap (20) fitting over each end of the rotor assembly. The lugs are attached to the cap so to install the lugs on the rotor assembly.

REFERENCES:
patent: 4916346 (1990-04-01), Kliman
patent: 5023502 (1991-06-01), Johnson
patent: 5053666 (1991-10-01), Kliman et al.
patent: 5144182 (1992-09-01), Lemmer et al.

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