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Coupling with concentric contact around motor shaft for line start synchronous motor

United States Patent

October 3, 2017
View the Complete Patent at the US Patent & Trademark Office
A method comprises providing a line-start synchronous motor. The motor has a stator, a rotor core disposed within the stator, and a motor shaft. In accordance with a step of the method, a coupling for coupling a load to the motor is provided. The coupling has a motor shaft attachment portion configured to provide substantially concentric contact around the shaft at the end of the motor shaft. The coupling has a load attachment portion configured to operatively connect to a load. In accordance with a step of the method, a load is coupled to the motor with the coupling, and driven from start to at least near synchronous speed during steady state operation of the motor with a load coupled thereto. The motor shaft attachment portion may comprise a bushing assembly with matching and opposed tapered surfaces that cooperate to secure the motor shaft attachment portion around the motor shaft.
Melfi; Michael J. (Richfield, OH), Burdeshaw; Galen E. (Simpsonville, SC)
Baldor Electric Company (Fort Smith, AR)
14/ 269,437
May 5, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under agreement no. DE-FG36-08GO180132 awarded by the Department of Energy. The Government has certain rights in this invention.