US5663605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating electrical machine with electromagnetic and permanent magnet excitation
Assignee: ADYAR RIVER Ltd
•
Filing: 1995-05-03
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Granted: 1997-09-02
•
Expires: 2015-05-03
Abstract
Abstract In several embodiments of the present invention, an alternator is disclosed. The alternator includes a rotor having both wound-field and permanent magnet poles. The wound-field and permanent magnet poles are disposed about the circumference of the rotor.
Inventors
- 👤 Paul Michael Evans
- 👤 Roy David Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:00
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/02; H02K21/04; H02K21/042; H02K1/00; H02K1/06; H02K1/22; H02K1/223; H02K1/24; H02K1/27; H02K1/2706; H02K1/272; H02K1/274; H02K1/2753; H02K1/276; H02K19/00; H02K19/16; H02K19/26; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/19; Y10S174/21
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
An electrical machine comprising: a generally-annular stator; and a rotor rotatably mounted within said stator and defining an axis of rotation, said rotor having an axially-extending periphery, said rotor comprising a plurality of wound-field poles disposed about at least one portion of said periphery and a plurality of permanent magnet poles all disposed about at least one circumferentially-different portion of said periphery, said wound-field poles in general axial alignment with said permanent magnet poles, said permanent magnet poles each further having a magnetized surface of one polarity generally facing said stator and a magnetized surface of the opposite polarity generally facing away from said stator; wherein said wound-field poles are salient poles; wherein said permanent magnet poles are disposed in circumferentially-adjacent pairs, without an intervening wound-field pole; wherein each said circumferentially-consecutive pair of permanent magnet poles share a common radially-extending base; and wherein said wound-field poles are disposed in circumferentially-consecutive pairs, without an intervening permanent magnet pole.
Claim 2
Dependent Claim
157 words
An electrical machine comprising: a generally-annular stator; and a rotor rotatably mounted within said stator and defining an axis of rotation, said rotor having an axially-extending periphery, said rotor comprising a plurality of wound-field poles disposed about at least one portion of said periphery and a plurality of permanent magnet poles all disposed about at least one circumferentially-different portion of said periphery, said wound-field poles in general axial alignment with said permanent magnet poles, said permanent magnet poles each further having a magnetized surface of one polarity generally facing said stator and a magnetized surface of the opposite polarity generally facing away from said stator; wherein said wound-field poles are salient poles; wherein said permanent magnet poles are disposed in circumferentially-adjacent pairs, without an intervening wound-field pole; wherein each said circumferentially-consecutive pair of permanent magnet poles share a common radially-extending base; and wherein said wound-field poles are disposed in circumferentially-consecutive pairs, without an intervening permanent magnet pole.
Claim 3
Dependent Claim
33 words
An electrical machine as recited in claim 1, wherein said pairs of circumferentially-adjacent permanent magnet poles are of opposite magnetic polarity and said pairs of circumferentially-adjacent wound-field poles are of opposite magnetic polarity.
Claim 4
Dependent Claim
35 words
An electrical machine as recited in claim 2, wherein: said wound-field poles each have a base with windings wound around said base; and said bases of said circumferentially-adjacent pairs of wound-field poles are substantially parallel.
Claim 5
Dependent Claim
20 words
An electrical machine as recited in claim 3, wherein said rotor comprises six wound-field poles and six permanent magnet poles.
Claim 6
Dependent Claim
83 words
An electrical machine comprising: a generally-annular stator; and a rotor rotatably mounted within said stator and defining an axis of rotation, said rotor having an axially-extending periphery, said rotor comprising a plurality of wound-field poles disposed about at least one portion of said periphery and a plurality of permanent magnet poles all disposed about at least one circumferentially-different portion of said periphery, said wound-field poles in general axial alignment with said permanent magnet poles; wherein said wound-field poles are disposed in circumferentially-consecutive pairs.
Claim 7
Dependent Claim
83 words
An electrical machine comprising: a generally-annular stator; and a rotor rotatably mounted within said stator and defining an axis of rotation, said rotor having an axially-extending periphery, said rotor comprising a plurality of wound-field poles disposed about at least one portion of said periphery and a plurality of permanent magnet poles all disposed about at least one circumferentially-different portion of said periphery, said wound-field poles in general axial alignment with said permanent magnet poles; wherein said wound-field poles are disposed in circumferentially-consecutive pairs.
Claim 8
Dependent Claim
18 words
An electrical machine as recited in claim 5, wherein said permanent magnet poles are disposed in circumferentially-consecutive pairs.
Claim 9
Dependent Claim
33 words
An electrical machine as recited in claim 6, wherein said pairs of circumferentially-consecutive permanent magnet poles are of opposite magnetic polarity and said pairs of circumferentially-consecutive wound-field poles are of opposite magnetic polarity.
Claim 10
Dependent Claim
41 words
An electrical machine as recited in claim 7, wherein: said wound-field poles are salient poles; said wound-field poles each have a base with windings wound around said base; and said bases of said circumferentially-consecutive pairs of wound-field poles are substantially parallel.
Claim 11
Dependent Claim
20 words
An electrical machine as recited in claim 8, wherein said rotor comprises six wound-field poles and six permanent magnet poles.
Claim 12
Dependent Claim
50 words
An electrical machine as recited in claim 7, wherein: said rotor further comprises two pole pieces each with generally-circular bodies, the bodies of said pole pieces defining an axis of rotation of said rotor; and at least some of said wound-field poles extend axially from one of said pole pieces.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-01 | 2001-03-03 | 2001-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-01 | 2005-03-03 | 2005-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-01 | 2009-03-03 | 2009-09-02 | $7700.00 | Window Closed / Lapsed |