Patent US3842300A successfully refreshed from Google Patents.
US3842300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated rotor structure for a dynamoelectric machine
Assignee: Ford Motor Co
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Filing: 1973-04-30
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Granted: 1974-10-15
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Expires: 1993-04-30
Abstract
Abstract A dynamoelectric machine laminated rotor structure having improved performance/magnetic characteristics, cost features is disclosed. The laminated rotor structure comprises a plurality of segmented rotor discs each of which has a generally annular core from which a plurality of segments or fingers extend radially. Each segment or finger is terminated in a circumferentially extending flux gathering portion which is arranged at an angle with respect to the radially directed finger portion. The rotor or armature structure fabricated from the plurality of rotor disc having the generally axially extending flux gathering portion therefore presents a relatively large flux gathering area distributed over a relatively long axial length in comparison with the axial length of the core of the laminated structure.
Inventors
- 👤 T Daykin
- 👤 A Ryff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:11
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/26
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
195 words
A dynamoelectric machine comprising a housing, an armature rotatably received within said housing, means for producing a magnetic field positioned about said armature and coupled to said housing, said armature comprising a stack of closely axially spaced laminated members, each member comprising a substantially circular core section and having a plurality of generally outwardly directed finger elements, the members of the stack being arranged so that the finger elements of adjacent members are axially aligned as a winding receiving portion, each finger element including a flux collecting portion at its radially remote free end whereby the flux collecting portions are positioned adjacent said magnetic field producing means, said armature further comprising means defining armature windings spaced in proximity to the core sections of the lamination members, said armature windings comprising at least one electrical conductor extending in a first axial direction between the first pairs of radially adjacent aligned finger elements and in an opposite axial direction between second pairs of radially adjacent finger elements, the axial length of the stack of laminations at the flux collecting portion is substantially greater than the axial length of the stack of laminations at the winding receiving portion.
Claim 2
Dependent Claim
195 words
A dynamoelectric machine comprising a housing, an armature rotatably received within said housing, means for producing a magnetic field positioned about said armature and coupled to said housing, said armature comprising a stack of closely axially spaced laminated members, each member comprising a substantially circular core section and having a plurality of generally outwardly directed finger elements, the members of the stack being arranged so that the finger elements of adjacent members are axially aligned as a winding receiving portion, each finger element including a flux collecting portion at its radially remote free end whereby the flux collecting portions are positioned adjacent said magnetic field producing means, said armature further comprising means defining armature windings spaced in proximity to the core sections of the lamination members, said armature windings comprising at least one electrical conductor extending in a first axial direction between the first pairs of radially adjacent aligned finger elements and in an opposite axial direction between second pairs of radially adjacent finger elements, the axial length of the stack of laminations at the flux collecting portion is substantially greater than the axial length of the stack of laminations at the winding receiving portion.
Claim 3
Dependent Claim
61 words
The combination of claim 1 in which each of said lamination members has a substantially planar central portion, and an annular peripheral portion positioned at an angle less than about 180* with respect to said planar central portion, said substantially planar central portions being positioned in engagement with one another, and said angulation occurring intermediate the ends of said finger elements.
Claim 4
Dependent Claim
40 words
The combination of claim 2 in which two centrally positioned laminations are positioned with their substantially planar central portions positioned in engagement, and the peripheral portions extending in opposite angular directions, the remainder of said laminations nesting within adjacent laminations.
Claim 5
Dependent Claim
30 words
The combination of claim 2 in which two central laminations have their substantially planar central portions positioned in abutting relationship and their annular peripheral portions extending in opposed angular relationship.
Claim 6
Dependent Claim
21 words
The combination of claim 4 in which said annular peripheral portions have axially extending portions extending therefrom in opposite axial directions.
Claim 7
Dependent Claim
16 words
The combination of claim 5 in which said axially extending portions are positioned in abutting engagement.
Claim 8
Dependent Claim
47 words
The combination of claim 1 in which a plurality of laminations positioned in the center of said stacks are substantially planar, and the remainder comprise one group having their peripheral portions extending in one direction and another group having their peripheral portions extending in the other direction.
Claim 9
Dependent Claim
60 words
The combination of claim 1 in which the two central laminations have substantially planar surfaces positioned in abutting relationship and the other surface of each has a peripheral portion extending at an angle to said planar surface, the remainder of said laminations including a central planar portion and angularly extending peripheral portion positioned in nesting engagement with said central laminations.
Claim 10
Dependent Claim
61 words
The combination of claim 1 in which each lamination has a central annular portion and a plurality of radially extending teeth extending from said central annular portion, said central annular portion and a portion of each tooth joining said central annular portion defining a plane, the radial outward portion of each tooth extending at an angle with respect to said plane.
Claim 11
Dependent Claim
74 words
A dynamoelectric machine comprising an armature, a field, means rotatably coupling said armature and field, said armature including a plurality of laminations constructed of ferromagnetic material, said plurality of laminations including a flux collecting portion extending beyond said winding supporting portion in a direction parallel to the axis of rotation of said armature, said laminations, at said winding supporting portion, contactively engaging one another, and an armature winding positioned about said winding supporting portion.
Claim 12
Dependent Claim
74 words
A dynamoelectric machine comprising an armature, a field, means rotatably coupling said armature and field, said armature including a plurality of laminations constructed of ferromagnetic material, said plurality of laminations including a flux collecting portion extending beyond said winding supporting portion in a direction parallel to the axis of rotation of said armature, said laminations, at said winding supporting portion, contactively engaging one another, and an armature winding positioned about said winding supporting portion.
Claim 13
Dependent Claim
85 words
A dynamoelectric machine comprising a housing, an armature mounted in said housing, means positioned about said armature for producing a magnetic field, the armature comprising a body portion constructed of material having ferromagnetic characteristics, said body portion having a flux collecting portion positioned adjacent said magnet field producing means and a winding receiving portion positioned radially inwardly of said flux collecting portion, the flux collecting portion extending in an axial direction beyond said winding receiving portion at each axial end of said winding receiving portion.
Claim 14
Dependent Claim
85 words
A dynamoelectric machine comprising a housing, an armature mounted in said housing, means positioned about said armature for producing a magnetic field, the armature comprising a body portion constructed of material having ferromagnetic characteristics, said body portion having a flux collecting portion positioned adjacent said magnet field producing means and a winding receiving portion positioned radially inwardly of said flux collecting portion, the flux collecting portion extending in an axial direction beyond said winding receiving portion at each axial end of said winding receiving portion.
Claim 15
Dependent Claim
138 words
A dynamoelectric machine comprising a stator, a generally cylindrically shaped rotor rotatably mounted in said stator for rotation about its axis, said rotor comprising a body portion constructed of a material having ferromagnetic characteristics, said body portion having a flux collecting portion and a winding receiving portion, at least two permanent magnets positioned in said stator in spaced radial relationship to said flux collecting portion, said flux collecting portion of said body portion being positioned radially outwardly of said winding receiving portion and in proximity to said permanent magnets, said flux collecting portion extending axially beyond said winding receiving portion, a winding received by said winding receiving portion in a position such that the effective length of said winding that interacts with the magnetic field of said magnets is positioned in an axial direction in said dynamoelectric machine.
Claim 16
Dependent Claim
138 words
A dynamoelectric machine comprising a stator, a generally cylindrically shaped rotor rotatably mounted in said stator for rotation about its axis, said rotor comprising a body portion constructed of a material having ferromagnetic characteristics, said body portion having a flux collecting portion and a winding receiving portion, at least two permanent magnets positioned in said stator in spaced radial relationship to said flux collecting portion, said flux collecting portion of said body portion being positioned radially outwardly of said winding receiving portion and in proximity to said permanent magnets, said flux collecting portion extending axially beyond said winding receiving portion, a winding received by said winding receiving portion in a position such that the effective length of said winding that interacts with the magnetic field of said magnets is positioned in an axial direction in said dynamoelectric machine.
Claim 17
Dependent Claim
108 words
A dynamoelectric machine comprising a stator member and a rotor member, means coupled to said stator member and said rotor member for rotatably mounting one of said members with respect to the other of said members, means positioned in one of said members for providing a magnetic field, the other of said members including a body portion constructed of material having ferromagnetic characteristics, said body portion having a magnetic flux collecting portion positioned adjacent said magnetic field and a winding receiving portion spaced from said flux receiving portion, the axial length of said flux collecting portion being substantially greater than the axial length of said winding receiving portion.
Claim 18
Dependent Claim
108 words
A dynamoelectric machine comprising a stator member and a rotor member, means coupled to said stator member and said rotor member for rotatably mounting one of said members with respect to the other of said members, means positioned in one of said members for providing a magnetic field, the other of said members including a body portion constructed of material having ferromagnetic characteristics, said body portion having a magnetic flux collecting portion positioned adjacent said magnetic field and a winding receiving portion spaced from said flux receiving portion, the axial length of said flux collecting portion being substantially greater than the axial length of said winding receiving portion.
Claim 19
Dependent Claim
68 words
The combination of claim 13 in which said rotor member is of substantially cylindrical configuration and is mounted for rotation with respect to said stator member about the cylindrical axis, and further comprising a winding positioned upon said winding receiving portion in a position such that the effective length of said winding that interacts with the magnetic field is positioned in a direction parallel to said cylindrical axis.
Claim 20
Dependent Claim
46 words
The combination of claim 14 in which the axial length of said winding receiving portion is approximately one half the axial length of said magnetic flux collecting portion at a position on said flux collecting portion most nearly adjacent said means for producing said magnetic field.
Claim 21
Dependent Claim
53 words
The combination of claim 13 in which said stator member is positioned around said rotor member in radially spaced relationship and said means for providing a magnetic field is positioned in one of said members to produce a radially extending magnetic field through the space between said members and through said other meMber.
Claim 22
Dependent Claim
49 words
The combination of claim 16 in which the axial length of said winding receiving portion of said body portion is substantially one half the axial length of said flux collecting portion at a position in said flux collecting portion most nearly adjacent said means for producing said magnetic field.
Claim 23
Dependent Claim
165 words
In a dynamoelectric machine of the type having an electromagnetic flux gap and at least one electromagnetic flux member having an electromagnetic flux surface comprising at least a portion of the boundary of the gap, the electromagnetic flux member having an electrical winding arranged for electrical current flow in alternating directions, an improved electromagnetic flux member comprising: a winding receiving portion dimensioned and sized to be at electromagnetic saturation under conditions of maximum current flow through the winding; a flux surface sized to have a flux density compatible with the maximum flux density which may be maintained in the flux gap, the flux density at the flux surface being less than the flux density in the winding receiving portion by the ratio of surface area to cross-sectional flux area in the winding receiving portion; and a transition portion arranged between the winding receiving portion and the flux surface whereby the flux density may smoothly vary from the saturation flux density to the surface flux density.
Claim 24
Dependent Claim
165 words
In a dynamoelectric machine of the type having an electromagnetic flux gap and at least one electromagnetic flux member having an electromagnetic flux surface comprising at least a portion of the boundary of the gap, the electromagnetic flux member having an electrical winding arranged for electrical current flow in alternating directions, an improved electromagnetic flux member comprising: a winding receiving portion dimensioned and sized to be at electromagnetic saturation under conditions of maximum current flow through the winding; a flux surface sized to have a flux density compatible with the maximum flux density which may be maintained in the flux gap, the flux density at the flux surface being less than the flux density in the winding receiving portion by the ratio of surface area to cross-sectional flux area in the winding receiving portion; and a transition portion arranged between the winding receiving portion and the flux surface whereby the flux density may smoothly vary from the saturation flux density to the surface flux density.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |