Patent US4155021A successfully refreshed from Google Patents.
US4155021A
Expired / Lapsed
US
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Segmental permanent-magnet stator magnet
Assignee: Robert Bosch GmbH
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Filing: 1977-07-12
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Granted: 1979-05-15
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Expires: 1997-07-12
Abstract
Abstract An electric machine includes a flux-return yoke, a plurality of segmental permanent-magnet stator magnets mounted in the yoke with their outer peripheral surfaces engaging the inner peripheral surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the segmental stator magnets. Either the segmental stator magnets on their outer peripheral surfaces or else the flux-return yoke on its inner peripheral surface is provided with a structured surface portion adapted to properly position the stator magnets relative to the yoke. The structured surface portion has the form of a multitude of projections of identical height arranged in rows to form an array.
Inventors
- 👤 Rainer Corbach
- 👤 Klaus Kobelentz
- 👤 Adolf Mohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:52
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/17
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
92 words
A permanent-magnet segmental stator magnet for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means integral with the outer surface thereof for spacing the outer surface of the stator magnet relative to the inner surface of a flux-return yoke.
Claim 2
Dependent Claim
92 words
A permanent-magnet segmental stator magnet for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means integral with the outer surface thereof for spacing the outer surface of the stator magnet relative to the inner surface of a flux-return yoke.
Claim 3
Dependent Claim
23 words
The segmental stator magnet defined in claim 1, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means.
Claim 4
Dependent Claim
25 words
The segmental stator magnet defined in claim 2, the structured outer surface portion being comprised by a multitude of projections arranged in a two-dimensional array.
Claim 5
Dependent Claim
14 words
The segmental stator magnet defined in claim 3, the array being parallelogram-form or rhomboidal.
Claim 6
Dependent Claim
15 words
The segmental stator magnet defined in claim 3, the projections being arranged in straight rows.
Claim 7
Dependent Claim
21 words
The segmental stator magnet defined in claim 5, the straight rows intersecting at angles to form a parallelogram-form or rhomboidal array.
Claim 8
Dependent Claim
28 words
The segmental stator magnet defined in claim 2, the structured outer surface portion being comprised of a cylindrical base surface and a multitude of identical-height projections projecting therefrom.
Claim 9
Dependent Claim
28 words
The segmental stator magnet defined in claim 2, the structured outer surface portion being comprised of a planar base surface and a multitude of identical-height projections projecting therefrom.
Claim 10
Dependent Claim
94 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the outer surface of the at least one segmental stator magnet relative to the inner surface of the flux-return yoke.
Claim 11
Dependent Claim
94 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the outer surface of the at least one segmental stator magnet relative to the inner surface of the flux-return yoke.
Claim 12
Dependent Claim
22 words
A flux-return yoke as defined in claim 9, the flux-return yoke having a structured inner surface portion constituting the integral spacing means.
Claim 13
Dependent Claim
24 words
The flux-return yoke defined in claim 10, the structured inner surface portion being comprised by a multitude of projections arranged in a two-dimensional array.
Claim 14
Dependent Claim
13 words
The flux-return yoke defined in claim 11, the array being parallelogram-form or rhomboidal.
Claim 15
Dependent Claim
14 words
The flux-return yoke defined in claim 11, the projections being arranged in straight rows.
Claim 16
Dependent Claim
27 words
The flux-return yoke defined in claim 10, the structured inner surface portion being comprised of a cylindrical base surface and a multitude of identical-height projections projecting therefrom.
Claim 17
Dependent Claim
27 words
The flux-return yoke defined in claim 10, the structured inner surface portion being comprised of a planar base surface and a multitude of identical-height projections projecting therefrom.
Claim 18
Dependent Claim
82 words
In an electric machine, in combination, a flux-return yoke; at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke; a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet; and spacing means located intermediate the flux-return yoke and the at least one segmental stator magnet operative for spacing the outer surface of the latter from the inner surface of the former.
Claim 19
Dependent Claim
82 words
In an electric machine, in combination, a flux-return yoke; at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke; a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet; and spacing means located intermediate the flux-return yoke and the at least one segmental stator magnet operative for spacing the outer surface of the latter from the inner surface of the former.
Claim 20
Dependent Claim
40 words
The electric machine defined in claim 16, the spacing means comprising integral spacing means on the outer surface of the at least one segmental stator magnet, each stator magnet having a structured outer peripheral surface constituting the integral spacing means.
Claim 21
Dependent Claim
35 words
The electric machine defined in claim 16, the spacing means comprising integral spacing means on the inner surface of the flux-return yoke, the flux-return yoke having a structured inner surface constituting the integral spacing means.
Claim 22
Dependent Claim
114 words
A permanent-magnet segmental stator magnet for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer peripheral surface portion being comprised of a multitude of pyramidal projections.
Claim 23
Dependent Claim
114 words
A permanent-magnet segmental stator magnet for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer peripheral surface portion being comprised of a multitude of pyramidal projections.
Claim 24
Dependent Claim
113 words
A permanent-magnet segmental stator magnet for use in electric macines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer surface portion being comprised of a multitude of conical projections.
Claim 25
Dependent Claim
113 words
A permanent-magnet segmental stator magnet for use in electric macines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer surface portion being comprised of a multitude of conical projections.
Claim 26
Dependent Claim
118 words
A permanent-magnet segmental stator magnet for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer surface portion being comprised of projections of equal height in the form of prismatic ribs.
Claim 27
Dependent Claim
118 words
A permanent-magnet segmental stator magnet for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer surface portion being comprised of projections of equal height in the form of prismatic ribs.
Claim 28
Dependent Claim
164 words
A permanent-magnet segmental stator magnet for use in electrical machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer surface portion being comprised by a multitude of projections arranged in a two-dimensional array, the projections being arranged in rows which intersect one another to form a parallelogram-form or rhomboidal array, each two intersecting rows forming an angle alpha which is symmetric with respect to the circumferential direction of the segmental stator magnet and has a value between 25° and 45°.
Claim 29
Dependent Claim
164 words
A permanent-magnet segmental stator magnet for use in electrical machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel permanent-magnet stator magnet comprising integral spacing means on the outer surface thereof for properly positioning the stator magnet relative to such flux-return yoke, the segmental stator magnet having a structured outer surface portion constituting the integral spacing means, the structured outer surface portion being comprised by a multitude of projections arranged in a two-dimensional array, the projections being arranged in rows which intersect one another to form a parallelogram-form or rhomboidal array, each two intersecting rows forming an angle alpha which is symmetric with respect to the circumferential direction of the segmental stator magnet and has a value between 25° and 45°.
Claim 30
Dependent Claim
113 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised of a multitude of pyramidal projections.
Claim 31
Dependent Claim
113 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised of a multitude of pyramidal projections.
Claim 32
Dependent Claim
113 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised of a multitude of conical projections.
Claim 33
Dependent Claim
113 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised of a multitude of conical projections.
Claim 34
Dependent Claim
118 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised of projections of equal height in the form of prismatic ribs.
Claim 35
Dependent Claim
118 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised of projections of equal height in the form of prismatic ribs.
Claim 36
Dependent Claim
137 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised by a multitude of projections arranged in a two-dimensional array, the projections being arranged in straight rows, the straight rows intersecting at angles to form a parallelogram-form or rhomboidal array.
Claim 37
Dependent Claim
137 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised by a multitude of projections arranged in a two-dimensional array, the projections being arranged in straight rows, the straight rows intersecting at angles to form a parallelogram-form or rhomboidal array.
Claim 38
Dependent Claim
163 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised by a multitude of projections arranged in a two-dimensional array, the projections being arranged in rows which intersect one another to form a parallelogram-form or rhomboidal array, each two intersecting rows forming an angle alpha which is symmetric with respect to the circumferential direction of the flux-return yoke and has a value between 25° and 45°.
Claim 39
Dependent Claim
163 words
A flux-return yoke for use in electric machines of the type comprised of a flux-return yoke, at least one segmental permanent-magnet stator magnet mounted on the yoke with its outer surface engaging the inner surface of the flux-return yoke, and a wound rotor mounted for rotation in the space defined by the at least one segmental stator magnet, the novel flux-return yoke comprising integral spacing means on the inner surface thereof for properly positioning the at least one segmental stator magnet relative to the flux-return yoke, the flux-return yoke having a structured inner surface portion constituting the integral spacing means, the structured inner surface portion being comprised by a multitude of projections arranged in a two-dimensional array, the projections being arranged in rows which intersect one another to form a parallelogram-form or rhomboidal array, each two intersecting rows forming an angle alpha which is symmetric with respect to the circumferential direction of the flux-return yoke and has a value between 25° and 45°.
References Cited (Backward Citations)
US3979619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |