Magnet management in electric machines
Abstract
A magnet management method of controlling a ferrite-type permanent magnet electrical machine includes receiving and/or estimating the temperature permanent magnets; determining if that temperature is below a predetermined temperature; and if so, then: selectively heating the magnets in order to prevent demagnetization and/or derating the machine. A similar method provides for controlling magnetization level by analyzing flux or magnetization level. Controllers that employ various methods are disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
- Inventors:
- Issue Date:
- Research Org.:
- GE Global Research, Niskayuna, New York (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1347536
- Patent Number(s):
- 9602043
- Application Number:
- 14/473,216
- Assignee:
- General Electric Company
- Patent Classifications (CPCs):
-
H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS
- DOE Contract Number:
- EE0005573
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Aug 29
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS
Citation Formats
Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, and Huh, Kum Kang. Magnet management in electric machines. United States: N. p., 2017.
Web.
Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, & Huh, Kum Kang. Magnet management in electric machines. United States.
Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, and Huh, Kum Kang. Tue .
"Magnet management in electric machines". United States. https://www.osti.gov/servlets/purl/1347536.
@article{osti_1347536,
title = {Magnet management in electric machines},
author = {Reddy, Patel Bhageerath and El-Refaie, Ayman Mohamed Fawzi and Huh, Kum Kang},
abstractNote = {A magnet management method of controlling a ferrite-type permanent magnet electrical machine includes receiving and/or estimating the temperature permanent magnets; determining if that temperature is below a predetermined temperature; and if so, then: selectively heating the magnets in order to prevent demagnetization and/or derating the machine. A similar method provides for controlling magnetization level by analyzing flux or magnetization level. Controllers that employ various methods are disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {3}
}
Works referenced in this record:
The Ferrite Permanent Magnet AC Motor---A Technical and Economical Assessment
journal, May 1985
- Richter, Eike; Miller, Timothy J. E.; Neumann, Thomas W.
- IEEE Transactions on Industry Applications, Vol. IA-21, Issue 3, p. 644-650
Rotor structure for reducing demagnetization of magnet in a PMASynRM with ferrite permanent magnet and its characteristics
conference, September 2011
- Sanada, Masayuki; Inoue, Yukinori; Morimoto, Shigeo
- 2011 IEEE Energy Conversion Congress and Exposition