Direct control of air gap flux in permanent magnet machines
Abstract
A method and apparatus for field weakening in PM machines uses field weakening coils (35, 44, 45, 71, 72) to produce flux in one or more stators (34, 49, 63, 64), including a flux which counters flux normally produced in air gaps between the stator(s) (34, 49, 63, 64) and the rotor (20, 21, 41, 61) which carries the PM poles. Several modes of operation are introduced depending on the magnitude and polarity of current in the field weakening coils (35, 44, 45, 71, 72). The invention is particularly useful for, but not limited to, the electric vehicle drives and PM generators.
- Inventors:
-
- Oak Ridge, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 872981
- Patent Number(s):
- 6057622
- Assignee:
- Lockhead Martin Energy Research Corporation (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- DOE Contract Number:
- AC05-96OR22464
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- direct; control; air; gap; flux; permanent; magnet; machines; method; apparatus; field; weakening; coils; 35; 44; 45; 71; 72; produce; stators; 34; 49; 63; 64; including; counters; normally; produced; gaps; stator; rotor; 20; 21; 41; 61; carries; poles; modes; operation; introduced; depending; magnitude; polarity; current; particularly; useful; limited; electric; vehicle; drives; generators; vehicle drive; air gap; electric vehicle; permanent magnet; particularly useful; normally produced; air gaps; field weakening; /310/
Citation Formats
Hsu, John S. Direct control of air gap flux in permanent magnet machines. United States: N. p., 2000.
Web.
Hsu, John S. Direct control of air gap flux in permanent magnet machines. United States.
Hsu, John S. Sat .
"Direct control of air gap flux in permanent magnet machines". United States. https://www.osti.gov/servlets/purl/872981.
@article{osti_872981,
title = {Direct control of air gap flux in permanent magnet machines},
author = {Hsu, John S},
abstractNote = {A method and apparatus for field weakening in PM machines uses field weakening coils (35, 44, 45, 71, 72) to produce flux in one or more stators (34, 49, 63, 64), including a flux which counters flux normally produced in air gaps between the stator(s) (34, 49, 63, 64) and the rotor (20, 21, 41, 61) which carries the PM poles. Several modes of operation are introduced depending on the magnitude and polarity of current in the field weakening coils (35, 44, 45, 71, 72). The invention is particularly useful for, but not limited to, the electric vehicle drives and PM generators.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}
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