System and method for preventing stator permanent magnet demagnetization during vacuum pressure impregnation
Abstract
A permanent magnet electrical machine includes a stator having conductive windings wound thereon and one or more permanent magnets embedded in the stator. A magnetic keeper element is positioned on the stator so as to form a magnetic flux path with the permanent magnets, with the magnetic keeper element closing the magnetic flux path of the permanent magnets by providing a low reluctance flux path to magnetic flux generated by the permanent magnets. A vacuum pressure impregnation (VPI) process is performed on the stator to increase a thermal conductivity of the windings, with the VPI process including a curing step that is performed at a selected temperature. The magnetic keeper element sets an operating point of the permanent magnets to an internal flux density level above a demagnetization threshold associated with the selected temperature at which the curing step is performed.
- Inventors:
- Issue Date:
- Research Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EE) (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1361419
- Patent Number(s):
- 9673667
- Application Number:
- 14/337,469
- Assignee:
- GENERAL ELECTRIC COMPANY
- Patent Classifications (CPCs):
-
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
- DOE Contract Number:
- EE0005573
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Jul 22
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Raminosoa, Tsarafidy, Alexander, James Pellegrino, and EL-Refaie, Ayman Mohamed Fawzi. System and method for preventing stator permanent magnet demagnetization during vacuum pressure impregnation. United States: N. p., 2017.
Web.
Raminosoa, Tsarafidy, Alexander, James Pellegrino, & EL-Refaie, Ayman Mohamed Fawzi. System and method for preventing stator permanent magnet demagnetization during vacuum pressure impregnation. United States.
Raminosoa, Tsarafidy, Alexander, James Pellegrino, and EL-Refaie, Ayman Mohamed Fawzi. Tue .
"System and method for preventing stator permanent magnet demagnetization during vacuum pressure impregnation". United States. https://www.osti.gov/servlets/purl/1361419.
@article{osti_1361419,
title = {System and method for preventing stator permanent magnet demagnetization during vacuum pressure impregnation},
author = {Raminosoa, Tsarafidy and Alexander, James Pellegrino and EL-Refaie, Ayman Mohamed Fawzi},
abstractNote = {A permanent magnet electrical machine includes a stator having conductive windings wound thereon and one or more permanent magnets embedded in the stator. A magnetic keeper element is positioned on the stator so as to form a magnetic flux path with the permanent magnets, with the magnetic keeper element closing the magnetic flux path of the permanent magnets by providing a low reluctance flux path to magnetic flux generated by the permanent magnets. A vacuum pressure impregnation (VPI) process is performed on the stator to increase a thermal conductivity of the windings, with the VPI process including a curing step that is performed at a selected temperature. The magnetic keeper element sets an operating point of the permanent magnets to an internal flux density level above a demagnetization threshold associated with the selected temperature at which the curing step is performed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 06 00:00:00 EDT 2017},
month = {Tue Jun 06 00:00:00 EDT 2017}
}
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Permanent magnet-excited assembly of an electrical machine, and process for its manufacture
patent, January 2001
- Sabinski, Joachim; Kuss, Hans
- US Patent Document 6,175,177
Permanent magnet type motor and compressor comprising it
patent, February 2005
- Kojima, Hiroaki; Kageyama, Jun; Yamagiwa, Akio
- US Patent Document 6,849,981
Method and apparatus for assembling a permanent magnet pole assembly
patent, August 2009
- Carl, Ralph; Bagepalli, Bharat Sampathkumaran; Jansen, Patrick Lee
- US Patent Document 7,573,168
Methods and apparatus for preventing demagnetization in interior permanent magnet machines
patent, November 2010
- Blissenbach, Rolf; Bird, Jonathan
- US Patent Document 7,843,100
Brushless motor and electric power steering apparatus equipped with the brushless motor
patent-application, October 2003
- Shimizu, Yasuo; Yoneda, Atsuhiko; Shiobara, Hitoshi
- US Patent Application 10/420586; 20030201681
Lightweight portable electric generator
patent-application, March 2005
- Cole, Gregory; Tews, Brian; Scaringe, Robert
- US Patent Application 10/649793; 20050046191
Lightweight Portable Electric Generator with Integrated Starter/Alternator
patent-application, October 2007
- Cole, Gregory S.; Tews, Brian E.; Scaringe, Robert P.
- US Patent Application 11/738569; 20070227470
Tooth Module for a Primary Part, with Permanent-Magnet Excitation, of an Electrical Machine
patent-application, August 2008
- Jajtic, Zeljko; Matscheko, Gerhard
- US Patent Application 12/067889; 20080185932
MOTOR
patent-application, May 2013
- Nishiyama, Noriyoshi
- US Patent Application 13/642901; 20130113318
IPM MACHINE WITH THERMALLY CONDUCTIVE COMPOUND
patent-application, October 2013
- Hamer, Colin; Creviston, Alex; Chamberlin, Bradley D.
- US Patent Application 13/851557; 20130257190
SPOKE TYPE PERMANENT MAGNET MOTOR
patent-application, January 2014
- Hong, Jung-Pyo; Kim, Sung-Il
- US Patent Application 14/008336; 20140021819
PERMANENT MAGNET ROTOR WITH RESIN-COVERED MAGNET AND LAMINATION FOR THERMAL CONTROL
patent-application, January 2014
- Hamer, Colin; Chamberlin, Bradley D.; Creviston, Alex
- US Patent Application 13/558839; 20140028139
Design and develop of a MW direct drive high-speed permanent-magnet machine for compression
conference, October 2013
- Tianyu Wang,
- 2013 International Conference on Electrical Machines and Systems (ICEMS)