System and method for heating ferrite magnet motors for low temperatures
Patent
·
OSTI ID:1368187
A system and method for heating ferrite permanent magnets in an electrical machine is disclosed. The permanent magnet machine includes a stator assembly and a rotor assembly, with a plurality of ferrite permanent magnets disposed within the stator assembly or the rotor assembly to generate a magnetic field that interacts with a stator magnetic field to produce a torque. A controller of the electrical machine is programmed to cause a primary field current to be applied to the stator windings to generate the stator magnetic field, so as to cause the rotor assembly to rotate relative to the stator assembly. The controller is further programmed to cause a secondary current to be applied to the stator windings to selectively generate a secondary magnetic field, the secondary magnetic field inducing eddy currents in at least one of the stator assembly and the rotor assembly to heat the ferrite permanent magnets.
- Research Organization:
- GENERAL ELECTRIC COMPANY, Schenectady, NY (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0005573
- Assignee:
- GENERAL ELECTRIC COMPANY
- Patent Number(s):
- 9,698,660
- Application Number:
- 14/063,547
- OSTI ID:
- 1368187
- 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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