Permanent magnet machine and method with reluctance poles and non-identical PM poles for high density operation
Abstract
A method and apparatus in which a stator (11) and a rotor (12) define a primary air gap (20) for receiving AC flux and at least one source (23, 40), and preferably two sources (23, 24, 40) of DC excitation are positioned for inducing DC flux at opposite ends of the rotor (12). Portions of PM material (17, 17a) are provided as boundaries separating PM rotor pole portions from each other and from reluctance poles. The PM poles (18) and the reluctance poles (19) can be formed with poles of one polarity having enlarged flux paths in relation to flux paths for pole portions of an opposite polarity, the enlarged flux paths communicating with a core of the rotor (12) so as to increase reluctance torque produced by the electric machine. Reluctance torque is increased by providing asymmetrical pole faces. The DC excitation can also use asymmetric poles and asymmetric excitation sources. Several embodiments are disclosed with additional variations.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1176305
- Patent Number(s):
- 7719153
- Application Number:
- 11/642,232
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
- DOE Contract Number:
- AC05-00OR22725
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS
Citation Formats
Hsu, John S. Permanent magnet machine and method with reluctance poles and non-identical PM poles for high density operation. United States: N. p., 2010.
Web.
Hsu, John S. Permanent magnet machine and method with reluctance poles and non-identical PM poles for high density operation. United States.
Hsu, John S. Tue .
"Permanent magnet machine and method with reluctance poles and non-identical PM poles for high density operation". United States. https://www.osti.gov/servlets/purl/1176305.
@article{osti_1176305,
title = {Permanent magnet machine and method with reluctance poles and non-identical PM poles for high density operation},
author = {Hsu, John S.},
abstractNote = {A method and apparatus in which a stator (11) and a rotor (12) define a primary air gap (20) for receiving AC flux and at least one source (23, 40), and preferably two sources (23, 24, 40) of DC excitation are positioned for inducing DC flux at opposite ends of the rotor (12). Portions of PM material (17, 17a) are provided as boundaries separating PM rotor pole portions from each other and from reluctance poles. The PM poles (18) and the reluctance poles (19) can be formed with poles of one polarity having enlarged flux paths in relation to flux paths for pole portions of an opposite polarity, the enlarged flux paths communicating with a core of the rotor (12) so as to increase reluctance torque produced by the electric machine. Reluctance torque is increased by providing asymmetrical pole faces. The DC excitation can also use asymmetric poles and asymmetric excitation sources. Several embodiments are disclosed with additional variations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 18 00:00:00 EDT 2010},
month = {Tue May 18 00:00:00 EDT 2010}
}
Works referenced in this record:
Development of New-Generation Hybrid System THS II - Drastic Improvement of Power Performance and Fuel Economy
conference, March 2004
- Muta, Koichiro; Yamazaki, Makoto; Tokieda, Junji
- SAE 2004 World Congress & Exhibition, SAE Technical Paper Series