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Title: Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof

Abstract

An internal permanent magnet machine includes a rotor assembly having a shaft comprising a plurality of protrusions extending radially outward from a main shaft body and being formed circumferentially about the main shaft body and along an axial length of the main shaft body. A plurality of stacks of laminations are arranged circumferentially about the shaft to receive the plurality of protrusions therein, with each stack of laminations including a plurality of lamination groups arranged axially along a length of the shaft and with permanent magnets being disposed between the stacks of laminations. Each of the laminations includes a shaft protrusion cut formed therein to receive a respective shaft protrusion and, for each of the stacks of laminations, the shaft protrusion cuts formed in the laminations of a respective lamination group are angularly offset from the shaft protrusion cuts formed in the laminations in an adjacent lamination group.

Inventors:
; ; ;
Issue Date:
Research Org.:
General Electric Co., Schenectady, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1241539
Patent Number(s):
9287742
Application Number:
13/958,693
Assignee:
General Electric Company, Schenectady, NY, US
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
DOE Contract Number:  
EE0005573
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Aug 05
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Reddy, Patel Bhageerath, EL-Refaie, Ayman Mohamed Fawzi, Huh, Kum-Kang, and Alexander, James Pellegrino. Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof. United States: N. p., 2016. Web.
Reddy, Patel Bhageerath, EL-Refaie, Ayman Mohamed Fawzi, Huh, Kum-Kang, & Alexander, James Pellegrino. Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof. United States.
Reddy, Patel Bhageerath, EL-Refaie, Ayman Mohamed Fawzi, Huh, Kum-Kang, and Alexander, James Pellegrino. Tue . "Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof". United States. https://www.osti.gov/servlets/purl/1241539.
@article{osti_1241539,
title = {Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof},
author = {Reddy, Patel Bhageerath and EL-Refaie, Ayman Mohamed Fawzi and Huh, Kum-Kang and Alexander, James Pellegrino},
abstractNote = {An internal permanent magnet machine includes a rotor assembly having a shaft comprising a plurality of protrusions extending radially outward from a main shaft body and being formed circumferentially about the main shaft body and along an axial length of the main shaft body. A plurality of stacks of laminations are arranged circumferentially about the shaft to receive the plurality of protrusions therein, with each stack of laminations including a plurality of lamination groups arranged axially along a length of the shaft and with permanent magnets being disposed between the stacks of laminations. Each of the laminations includes a shaft protrusion cut formed therein to receive a respective shaft protrusion and, for each of the stacks of laminations, the shaft protrusion cuts formed in the laminations of a respective lamination group are angularly offset from the shaft protrusion cuts formed in the laminations in an adjacent lamination group.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {3}
}

Works referenced in this record:

Reduction of cogging torque in permanent magnet motors
journal, January 1988


Dynamoelectric machine with permanent magnet and magnet mounting surface arrangement
patent, February 1987


Direct current motor having a decreasing cogging torque
patent, March 1997


Motor
patent, June 1998


High speed rotor
patent, April 2007


Embedded magnet type motor
patent, July 2010


Cooling system for rotating machine
patent, August 2011


Dovetail spoke internal permanent magnet machine
patent, August 2011


Permanent magnet machine with offset pole spacing
patent, February 2012


Rotor for an electrical machine
patent, March 2013


Rotor
patent, December 2014