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

Patent ·
OSTI ID:1397238
;

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.

Research Organization:
Baldor Electric Company, Fort Smith, AR (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG36-08GO180132
Assignee:
Baldor Electric Company
Patent Number(s):
9,780,620
Application Number:
14/269,437
OSTI ID:
1397238
Resource Relation:
Patent File Date: 2014 May 05
Country of Publication:
United States
Language:
English

References (12)

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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