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

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.
Issue Date:
OSTI Identifier:
Baldor Electric Company GFO
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2014 May 05
Research Org:
Baldor Electric Company, Fort Smith, AR (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Powder coupling
patent, July 1959

Dry fluid drive and rotor therefor
patent, October 1978

Soft start coupling
patent, November 1990

Method of fabricating a rotor for an electric motor
patent, June 1998

Rotor structure of line-start permanent magnet synchronous motor
patent, January 2005

Rotation coupling employing torque converter and synchronization motor
patent, September 2008

Single phase line start permanent magnet synchronous motor
patent-application, December 2002

Method for starting an eletric motor and electric motor with a device for starting the motor
patent-application, September 2003

Conveying apparatus
patent-application, February 2004

Multi-ribbed keyless coupling
patent-application, March 2009

System and Method to Allow a Synchronous Motor to Successfully Synchronize with Loads that Have High Inertia and/or High Torque
patent-application, October 2013

Synchronous Motor With Soft Start Element Formed Between The Motor Rotor And Motor Output Shaft To Successfully Synchronize Loads That Have High Inertia And/Or High Torque
patent-application, October 2013

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