Patent US6326713B1 successfully refreshed from Google Patents.
US6326713B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
A.C. electrical machine and method of transducing power between two different systems
Assignee: Individual
•
Filing: 1997-06-25
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Granted: 2001-12-04
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Expires: 2017-06-25
Abstract
Abstract A structure for an a.c. electrical machine and method of transducing power between two different systems. The machine comprises two electrically balanced transformers which are generally, but not exclusively, three phase. Initially the transformers are in balance and no currents flow in the secondary windings of the transformers. An electrical or mechanical imbalance is introduced between the transformers causing current to circulate in the secondary windings. The secondary windings in one embodiment are provided on a rotor in which case the currents induced in the secondary windings cause a torque to be exerted on the rotor. It is also possible to arrange the machine as a transformer or alternator.
Inventors
- 👤 John Judson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:49
CPC Classifications
H; H02; H02K; H02K99/00
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
226 words
An a.c. electrical machine comprising at least a first and a second transformer, each transformer including at least one primary coil mounted upon a first mounting and at least one secondary coil mounted upon a second mounting, said transformers being arranged to be inductively coupled each to at least one other and further arranged such that magnetic fields are produced solely or substantially solely by current flowing through said primary coils and said secondary coils, said secondary coils being interconnected and arranged such that said machine has a balanced state in which the voltages, currents, fluxes of said primary coils are such that substantially no current flows in the secondary coils and an un-balanced state in which said voltages, currents and fluxes of said primary coils are such that current flows in said secondary coils, and further arranged such that said primary coil mounting and said secondary coil mounting are moveably mounted relative to each other, the machine further comprising an unbalancer arranged to adjust said voltages, currents, fluxes, of at least one of said primary coils of said first transformer relative to said primary coils of said second transformer to introduce an electromagnetic unbalance between said transformers such that said machine enters said un-balanced state, thereby transferring electrical power between said primary and secondary coils, and transferring mechanical power between said first and second mountings.
Claim 2
Dependent Claim
226 words
An a.c. electrical machine comprising at least a first and a second transformer, each transformer including at least one primary coil mounted upon a first mounting and at least one secondary coil mounted upon a second mounting, said transformers being arranged to be inductively coupled each to at least one other and further arranged such that magnetic fields are produced solely or substantially solely by current flowing through said primary coils and said secondary coils, said secondary coils being interconnected and arranged such that said machine has a balanced state in which the voltages, currents, fluxes of said primary coils are such that substantially no current flows in the secondary coils and an un-balanced state in which said voltages, currents and fluxes of said primary coils are such that current flows in said secondary coils, and further arranged such that said primary coil mounting and said secondary coil mounting are moveably mounted relative to each other, the machine further comprising an unbalancer arranged to adjust said voltages, currents, fluxes, of at least one of said primary coils of said first transformer relative to said primary coils of said second transformer to introduce an electromagnetic unbalance between said transformers such that said machine enters said un-balanced state, thereby transferring electrical power between said primary and secondary coils, and transferring mechanical power between said first and second mountings.
Claim 3
Dependent Claim
25 words
An a.c. electrical machine according to claim 1 in which flux linkage between said primary coils and said secondary coils occurs across an air gap.
Claim 4
Dependent Claim
23 words
An a.c. electrical machine according to claim 1 in which said secondary coils are free to rotate with respect to said primary coils.
Claim 5
Dependent Claim
32 words
An a.c. electrical machine according to claim 3 in which the control of speed of said electrical machine at constant torque is achieved by alteration of the voltage across said primary coils.
Claim 6
Dependent Claim
33 words
An a.c. electrical machine according to claim 3 in which the control of speed of said electrical machine at constant power is achieved by alteration of the current flowing through said primary coils.
Claim 7
Dependent Claim
12 words
An a.c. electrical machine according to claim 3 which is a motor.
Claim 8
Dependent Claim
12 words
An a.c. electrical machine according to claim 3 which is an alternator.
Claim 9
Dependent Claim
15 words
An a.c. electrical machine according to claim 7 which is utilized as a wind turbine.
Claim 10
Dependent Claim
15 words
An a.c. electrical machine according to claim 7 which is utilized as a water turbine.
Claim 11
Dependent Claim
16 words
An a.c. electrical machine according to claim 7 which is utilized as a wave powered generator.
Claim 12
Dependent Claim
18 words
An a.c. electrical machine according to claim 1 in which there is provided a rotor and a stator.
Claim 13
Dependent Claim
46 words
An a.c. electrical machine according to claim 7 having at least one control coil mounted on said stator and which generates electricity at a fixed frequency dependent upon the frequency of excitation of said control windings but independent of the frequency of rotation of said rotor.
Claim 14
Dependent Claim
21 words
An a.c. electrical machine according to claim 11 in which said secondary coils of said transformers are mounted on said rotor.
Claim 15
Dependent Claim
32 words
An a.c. electrical machine according to claim 13 which comprises a three phase transformer in balanced opposition to a similar three phase transformer having interconnected secondaries arranged symmetrically on a common rotor.
Claim 16
Dependent Claim
32 words
An a.c. electrical machine according to claim 13 in which at least a second set of secondary coils are mounted on said rotor displaced from the first set by a small angle.
Claim 17
Dependent Claim
36 words
An a.c. electrical machine according to claim 13 in which said primary coils create a magnetic field and portions of said secondary coils running perpendicularly to said magnetic field from said primary coils comprise single conductors.
Claim 18
Dependent Claim
36 words
An a.c. electrical machine according to claim 13 in which said primary coils create a magnetic field and portions of said secondary coils running perpendicularly to said magnetic field from said primary coils comprise multiple conductors.
Claim 19
Dependent Claim
32 words
An a.c. electrical machine according to claim 13 in which said secondary coils are moved between a first position and a second position by rotation of said rotor relative to said stator.
Claim 20
Dependent Claim
19 words
An a.c. electrical machine according to claim 11 in which there are two distinct coils mounted on said rotor.
Claim 21
Dependent Claim
18 words
An a.c. electrical machine according to claim 11 in which there are three coils wound on said rotor.
Claim 22
Dependent Claim
18 words
An a.c. electrical machine according to claim 11 in which there are multiple coils wound on said rotor.
Claim 23
Dependent Claim
21 words
An a.c. electrical machine according to claim 11 in which said primary coils of said transformers are mounted on said stator.
Claim 24
Dependent Claim
31 words
An a.c. electrical machine according to claim 11 which has, in addition to the primary coil, at least one control coil mounted on said stator and associated with said primary coil.
Claim 25
Dependent Claim
21 words
An a.c. electrical machine according to claim 23 which has at least one said control coil for each said primary coil.
Claim 26
Dependent Claim
32 words
An a.c. electrical machine according to claim 23 in which the unbalancer is arranged to induce currents in said control coil so as to modify the currents flowing in said primary coils.
Claim 27
Dependent Claim
32 words
An a.c. electrical machine according to claim 23 in which said unbalancer is arranged to adjust the voltages across said control coils as to modify the currents flowing in said primary coils.
Claim 28
Dependent Claim
18 words
An a.c. electrical machine according to claim 23 in which superconducting conductors are utilized in said control windings.
Claim 29
Dependent Claim
17 words
An a.c. electrical machine according to claim 1 in which said primary coils are multi phase coils.
Claim 30
Dependent Claim
17 words
An a.c. electrical machine according to claim 28 in which said primary coils are three phase coils.
Claim 31
Dependent Claim
34 words
An a.c. electrical machine according to claim 29 in which one of said primary coils is connected in a star configuration and the other of said primary coils is connected in a delta configuration.
Claim 32
Dependent Claim
21 words
An a.c. electrical machine according to claim 29 in which both of said primary coils are connected in a star configuration.
Claim 33
Dependent Claim
21 words
An a.c. electrical machine according to claim 29 in which both of said primary coils are connected in a delta configuration.
Claim 34
Dependent Claim
17 words
An a.c. electrical machine according to claim 1 in which said secondary coils are multi phase coils.
Claim 35
Dependent Claim
17 words
An a.c. electrical machine according to claim 33 in which said secondary coils are three phase coils.
Claim 36
Dependent Claim
21 words
An a.c. electrical machine according to claim 34 in which both of said secondary coils are connected in a star configuration.
Claim 37
Dependent Claim
21 words
An a.c. electrical machine according to claim 34 in which both of said secondary coils are connected in a delta configuration.
Claim 38
Dependent Claim
31 words
An a.c. electrical machine according to claim 34 in which said secondary coils are provided in a single physical coil so as to provide two or more effective delta configured circuits.
Claim 39
Dependent Claim
31 words
An a.c. electrical machine according to claim 34 in which both of said secondary coils are provided in a single physical coil so as to provide two effective star configured circuits.
Claim 40
Dependent Claim
16 words
An a.c. electrical machine according to claim 1 in which said secondary coils are wave wound.
Claim 41
Dependent Claim
21 words
An a.c. electrical machine according to claim 1 in which said primary coils are excited with a pulse width modulated supply.
Claim 42
Dependent Claim
22 words
An a.c. electrical machine according to claim 1 which is powered from a three phase supply electronically generated from a battery supply.
Claim 43
Dependent Claim
13 words
An a.c. electrical machine according to claim 1 which is submersible in water.
Claim 44
Dependent Claim
24 words
An a.c. electrical machine according to claim 1 in which an interior of the machine is cooled below a temperature allowing superconductors to operate.
Claim 45
Dependent Claim
19 words
An a.c. electrical machine according to claim 1 which utilizes superconducting conductors in said primary or said secondary coils.
Claim 46
Dependent Claim
14 words
An a.c. electrical machine according to claim 1 which utilizes an electronic power supply.
Claim 47
Dependent Claim
15 words
An a.c. electrical machine according to claim 1 which utilizes an inverter type power supply.
Claim 48
Dependent Claim
225 words
An a.c. electrical machine comprising at least a first and a second transformer, each transformer including at least one primary coil mounted upon a stator and at least one secondary coil mounted upon a rotor, said transformers being arranged to be inductively coupled each to at least one other and further arranged such that magnetic fields are produced solely or substantially solely by current flowing through said primary coils and said secondary coils, said secondary coils of said machine being interconnected and arranged such that said machine has a balanced state in which the voltages, currents, fluxes, of said primary coils are such that substantially no current flows in the secondary coils and an un-balanced state in which said voltages, currents and fluxes of said primary coils are such that current flows in the secondary coils, and further arranged such that said primary coils and said secondary coils are moveably mounted relative to each other, the machine further comprising an unbalancer arranged to adjust said voltages, currents, fluxes, of at least one of said primary coils of said first transformer relative to said primary coils of said second transformer to introduce an electromagnetic unbalance between said transformers such that said machine enters said un-balanced state, thereby transferring electrical power between said primary and secondary coils, and transferring mechanical power between said first and second mountings.
Claim 49
Dependent Claim
225 words
An a.c. electrical machine comprising at least a first and a second transformer, each transformer including at least one primary coil mounted upon a stator and at least one secondary coil mounted upon a rotor, said transformers being arranged to be inductively coupled each to at least one other and further arranged such that magnetic fields are produced solely or substantially solely by current flowing through said primary coils and said secondary coils, said secondary coils of said machine being interconnected and arranged such that said machine has a balanced state in which the voltages, currents, fluxes, of said primary coils are such that substantially no current flows in the secondary coils and an un-balanced state in which said voltages, currents and fluxes of said primary coils are such that current flows in the secondary coils, and further arranged such that said primary coils and said secondary coils are moveably mounted relative to each other, the machine further comprising an unbalancer arranged to adjust said voltages, currents, fluxes, of at least one of said primary coils of said first transformer relative to said primary coils of said second transformer to introduce an electromagnetic unbalance between said transformers such that said machine enters said un-balanced state, thereby transferring electrical power between said primary and secondary coils, and transferring mechanical power between said first and second mountings.
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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) | 2004-12-03 | 2005-06-04 | 2005-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-03 | 2009-06-04 | 2009-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-03 | 2013-06-04 | 2013-12-04 | $7700.00 | Window Closed / Lapsed |