Magnet management in electric machines
Patent
·
OSTI ID:1347536
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.
- Research Organization:
- General Electric Company, Niskayuna, NY (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0005573
- Assignee:
- General Electric Company
- Patent Number(s):
- 9,602,043
- Application Number:
- 14/473,216
- OSTI ID:
- 1347536
- Country of Publication:
- United States
- Language:
- English
Rotor structure for reducing demagnetization of magnet in a PMASynRM with ferrite permanent magnet and its characteristics
|
conference | September 2011 |
The Ferrite Permanent Magnet AC Motor---A Technical and Economical Assessment
|
journal | May 1985 |
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