US3562568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High performance dynamoelectric machine with permanent magnet stator
Assignee: General Electric Co
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Filing: 1969-06-09
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Granted: 1971-02-09
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Expires: 1989-06-09
Abstract
Abstract High-performance dynamoelectric machine capable of rapid response to fast changing operational requirements and conditions incorporates stator having magnetic poles and shell. Each pole comprises two axially extending separated pole pieces connected to shell by two or more axially extending permanent magnets. Pole pieces are separated transversely by a space in which a conductor is disposed. Conductors are connected to form a short-circuited winding. Low inertia rotor includes a magnetic core having stub shafts secured to ends thereof and a commutator on one stub shaft. Conductors in circuit with commutator extend axial length of rotor core and are embedded in insulating material compatible with other insulation used, to maintain the conductors in place but permit effective dissipation of heat from the rotor assembly. Baffles may be used to force cooling fluid over and around the movable member to provide increased heat dissipation.
Inventors
- 👤 Robert A Susdorf
- 👤 Fredrick J Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:35
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/18; H02K3/20; H02K23/00; H02K23/02; H02K23/04; H02K9/00; H02K9/02; H02K9/04
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
118 words
A DC dynamoelectric machine comprising a stator including a shell and at least two magnetic poles defining a bore; a rotor mounted in the bore for rotation relative to said stator; each pole comprising at least two permanent magnets defining a polar region and fixed to said shell, and a pole piece fixed to each of said permanent magnets, said magnets and pole pieces extending axially of the shell; and means for increasing the reluctance to magnetic flux tending to flow between adjacent permanent magnets in each polar region; said means for increasing including winding means comprising at least one conductor within each polar region extending axially of the shell and being disposed intermediate the adjacent permanent magnets.
Claim 2
Dependent Claim
118 words
A DC dynamoelectric machine comprising a stator including a shell and at least two magnetic poles defining a bore; a rotor mounted in the bore for rotation relative to said stator; each pole comprising at least two permanent magnets defining a polar region and fixed to said shell, and a pole piece fixed to each of said permanent magnets, said magnets and pole pieces extending axially of the shell; and means for increasing the reluctance to magnetic flux tending to flow between adjacent permanent magnets in each polar region; said means for increasing including winding means comprising at least one conductor within each polar region extending axially of the shell and being disposed intermediate the adjacent permanent magnets.
Claim 3
Dependent Claim
50 words
The dynamoelectric machine of claim 1 wherein the means for increasing the reluctance to magnetic flux includes a plurality of nonmagnetic inserts for said shell, one for each pole, said nonmagnetic inserts extending axially of said shell and being transversely located in said shell at the centerline of said poles.
Claim 4
Dependent Claim
33 words
The dynamoelectric machine of claim 1 in which a conductor in one polar region is electrically connected to a conductor in another polar region whereby a short-circuited winding is formed in said stator.
Claim 5
Dependent Claim
40 words
The dynamoelectric machine of claim 1 in which said rotor comprises a magnetic core, shaft means secured to opposite ends of said core, a commutator, and a plurality of armature coils wound on said core and connected to said commutator.
Claim 6
Dependent Claim
44 words
The dynamoelectric machine of claim 4 in which said magnetic core comprises a plurality of laminations secured together by an interlaminate adhesive and said shaft means comprises a pair of stub shafts having complementary surfaces or for mating with an end of said core.
Claim 7
Dependent Claim
15 words
The dynamoelectric machine of claim 5 in which said laminations and complementary surfaces are nonplanar.
Claim 8
Dependent Claim
109 words
A dynamoelectric machine comprising a stator at least two polar regions defining a bore; a rotor mounted in the bore for rotation relative to said stator, said rotor including a magnetic core comprised of a plurality of laminations having generally convex and concave opposite side surfaces with interlaminate adhesive material primarily securing said laminations together to form a rigid self-supportable structure, at least one stub shaft shaft having a surface shaped for mating with a selected surface on an associated end of said core, said stub shaft being adhesively secured to said core; whereby an enlarged magnetic cross section of the core is permitted for a given rotor diameter.
Claim 9
Dependent Claim
109 words
A dynamoelectric machine comprising a stator at least two polar regions defining a bore; a rotor mounted in the bore for rotation relative to said stator, said rotor including a magnetic core comprised of a plurality of laminations having generally convex and concave opposite side surfaces with interlaminate adhesive material primarily securing said laminations together to form a rigid self-supportable structure, at least one stub shaft shaft having a surface shaped for mating with a selected surface on an associated end of said core, said stub shaft being adhesively secured to said core; whereby an enlarged magnetic cross section of the core is permitted for a given rotor diameter.
Claim 10
Dependent Claim
70 words
The dynamoelectric machine of claim 7 comprising a second stub shaft having a surface shaped for mating with another selected surface on the other end of said core, said surface of said one stub shaft and said surface of said second stub shaft being complementary, the selected surfaces of said core also being complementary, and said second stub shaft being adhesively secured to said another selected surface of the core.
Claim 11
Dependent Claim
16 words
The dynamoelectric machine of claim 7 in which said laminations have generally imperforate regions secured together.
Claim 12
Dependent Claim
94 words
A stator for a dynamoelectric machine comprising at least two magnetic poles establishing polar regions, each pole comprising at least twO permanent magnets and a pole piece fixed to each of said permanent magnets, the magnets and pole pieces extending axially of said stator and said pole pieces being separated transversely by a space, and a conductor disposed in the space within each polar region, said conductor forming shielding means between two adjacent permanent magnets thereby to tend to increase the reluctance to magnetic flux tending to flow between the two adjacent permanent magnets.
Claim 13
Dependent Claim
94 words
A stator for a dynamoelectric machine comprising at least two magnetic poles establishing polar regions, each pole comprising at least twO permanent magnets and a pole piece fixed to each of said permanent magnets, the magnets and pole pieces extending axially of said stator and said pole pieces being separated transversely by a space, and a conductor disposed in the space within each polar region, said conductor forming shielding means between two adjacent permanent magnets thereby to tend to increase the reluctance to magnetic flux tending to flow between the two adjacent permanent magnets.
Claim 14
Dependent Claim
39 words
The stator of claim 10 including a plurality of nonmagnetic inserts for said shell, one for each pole, said nonmagnetic inserts extending axially of said shell and being transversely located in said shell at the centerlines of said poles.
Claim 15
Dependent Claim
24 words
The stator of claim 10 in which each said conductor is electrically connected to each other said conductor whereby a short-circuited winding is formed.
Claim 16
Dependent Claim
86 words
A rotor for a dynamoelectric machine including a magnetic core comprised of a plurality of laminations being generally imperforate at the center portions thereof and being primarily secured together by an interlaminate adhesive material, at least one stub shaft having a surface shaped for mating with a surface on an associated end of said core, said stub shaft being adhesively secured to said core, a commutator mounted on said stub shaft, and a plurality of armature coils wound on said core and connected to said commutator.
Claim 17
Dependent Claim
86 words
A rotor for a dynamoelectric machine including a magnetic core comprised of a plurality of laminations being generally imperforate at the center portions thereof and being primarily secured together by an interlaminate adhesive material, at least one stub shaft having a surface shaped for mating with a surface on an associated end of said core, said stub shaft being adhesively secured to said core, a commutator mounted on said stub shaft, and a plurality of armature coils wound on said core and connected to said commutator.
Claim 18
Dependent Claim
63 words
The rotor of claim 13 comprising a second stub shaft having a surface shaped for mating with a surface on the other end of said core, said surface of said one stub shaft and said surface of said second stub shaft being complementary, the opposite surfaces of said core also being complementary, and said second stub shaft being adhesively secured to said core.
Claim 19
Dependent Claim
44 words
The rotor of claim 13 in which said laminations have a generally convex surface and a generally concave surface and wherein the laminations are arranged with the generally convex surface of one lamination adjacent to the generally concave surface of the next adjacent lamination.
Claim 20
Dependent Claim
149 words
A DC dynamoelectric machine comprising a stator including a shell and at least two magnetic poles defining a bore, each pole comprising at least two permanent magnets fixed to said shell and a pole piece fixed to each of said permanent magnets, said magnets and pole pieces extending axially of said shell and said pole being separated transversely by a space, a conductor disposed in the space; a rotor mounted in the bore for rotation relative to said stator; said rotor comprising a magnetic core; shaft means secured to opposite ends of said core; a commutator; and a plurality of armature coils wound on said coil connected to said commutator; said magnetic core comprising a plurality of laminations selected together by an interlaminate adhesive and said shaft means comprising stub shafts having complementary surfaces and mating with an end of said core; said laminations and complementary surfaces being cone-shaped.
Claim 21
Dependent Claim
149 words
A DC dynamoelectric machine comprising a stator including a shell and at least two magnetic poles defining a bore, each pole comprising at least two permanent magnets fixed to said shell and a pole piece fixed to each of said permanent magnets, said magnets and pole pieces extending axially of said shell and said pole being separated transversely by a space, a conductor disposed in the space; a rotor mounted in the bore for rotation relative to said stator; said rotor comprising a magnetic core; shaft means secured to opposite ends of said core; a commutator; and a plurality of armature coils wound on said coil connected to said commutator; said magnetic core comprising a plurality of laminations selected together by an interlaminate adhesive and said shaft means comprising stub shafts having complementary surfaces and mating with an end of said core; said laminations and complementary surfaces being cone-shaped.
Claim 22
Dependent Claim
166 words
A dynamoelectric machine comprising a stator including a shell and at least two magnetic poles defining a bore; a rotor mounted in the bore for rotation relative to said stator, said rotor including a magnetic core comprised of a plurality of laminations secured together by an interlaminate adhesive, at least one stub shaft having a surface shaped for mating with a surface on an associated end of said core, said stub shaft being adhesively secured to said core, a commutator mounted on said stub shaft, a plurality of armature coils wound on said core and connected to said commutator, and a second stub shaft having a surface shaped for mating with a surface on the other end of said core; said surface of said at least one stub shaft and said surface of said second stub shaft being complementary, the opposite surfaces of said core also being complementary, said second stub shaft being adhesively secured to said coil, and said laminations and complementary surfaces being cone-shaped.
Claim 23
Dependent Claim
166 words
A dynamoelectric machine comprising a stator including a shell and at least two magnetic poles defining a bore; a rotor mounted in the bore for rotation relative to said stator, said rotor including a magnetic core comprised of a plurality of laminations secured together by an interlaminate adhesive, at least one stub shaft having a surface shaped for mating with a surface on an associated end of said core, said stub shaft being adhesively secured to said core, a commutator mounted on said stub shaft, a plurality of armature coils wound on said core and connected to said commutator, and a second stub shaft having a surface shaped for mating with a surface on the other end of said core; said surface of said at least one stub shaft and said surface of said second stub shaft being complementary, the opposite surfaces of said core also being complementary, said second stub shaft being adhesively secured to said coil, and said laminations and complementary surfaces being cone-shaped.
Claim 24
Dependent Claim
93 words
A rotor for a dynamoelectric machine incLuding a magnetic core comprised of a plurality of laminations secured together by an interlaminate adhesive, at least one stub shaft having a surface shaped for mating with a surface on an associated end of said core, said stub shaft being adhesively secured to said core, a commutator mounted on said stub shaft, and a plurality of armature coils wound on said core and connected to said commutator; said laminations, said surface shaped for mating, and said surface on an associated end of said core being cone-shaped.
Claim 25
Dependent Claim
93 words
A rotor for a dynamoelectric machine incLuding a magnetic core comprised of a plurality of laminations secured together by an interlaminate adhesive, at least one stub shaft having a surface shaped for mating with a surface on an associated end of said core, said stub shaft being adhesively secured to said core, a commutator mounted on said stub shaft, and a plurality of armature coils wound on said core and connected to said commutator; said laminations, said surface shaped for mating, and said surface on an associated end of said core being cone-shaped.
References Cited (Backward Citations)
US1082532A
Cited
US1894273A
Cited
US2193406A
Cited
US2419863A
Cited
US2903610A
Cited
US3409788A
Cited
US3465184A
Cited
US3465186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |