Thomas M Donnelly

US Patent:

45771278, Mar 18, 1986

Filed:

Dec 21, 1983

Appl. No.:

6/563912

Inventors:

Herbert E. Ferree - Greensburg PA
Thomas R. Wagner - Monroeville PA
Michael D. Hecht - West Mifflin PA
Thomas J. Donnelly - Monroeville PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H02K 706

US Classification:

310 83

Abstract:

An improved electric actuator is provided, having in association therewith a resolver. The actuator includes a stationary and a rotatable housing, and an electric motor within it. The electric motor drives the rotary housing through a speed reducing harmonic drive mechanism. The actuator has an opening in the rotary housing, and a cavity inwardly of the opening having a mating anchoring element connected with the stationary housing. A modular resolver is provided, of a shape and size to have a major portion of it occupy the cavity provided in the actuator, and having a mating part for engaging the mating part of the stationary housing, upon assemblage of the resolver to the actuator. A rotatable part of the resolver is secured to the rotary housing. A heat dissipation system is provided, including a fan mounted on a rotary member of the actuator and a closed circuit for the passage of air between the fan and a heat conductive plate forming a part of the stationary housing.