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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 Company, Schenectady, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1241539
Patent Number(s):
9,287,742
Application Number:
13/958,693
Assignee:
General Electric Company, Schenectady, NY, US
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}
}

Patent:

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Works referenced in this record:

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

  • Touzhu Li, ; Slemon, G.
  • IEEE Transactions on Magnetics, Vol. 24, Issue 6
  • DOI: 10.1109/20.92282