US3714542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excitation system for a synchronous machine
Assignee: Individual
•
Filing: 1972-01-07
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Granted: 1973-01-30
•
Expires: 1992-01-07
Abstract
Abstract The present invention relates to an excitation system for a synchronous machine. The system according to the invention is characterized in that at least one phase of an additional winding has at least one of the coils with a reduced number of turns as compared with the number of turns in the remaining coils of that phase, and the number of turns in that coils can be reduced to zero.
Inventors
- 👤 V Arutjunian
- 👤 S Amamchian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:55
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/26; H02K19/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
An excitation system for a synchronous machine, comprising: a main armature winding located jointly with a multi-phase additional winding each phase of which is made up of coils and which is wound for three times as many poles as said armature winding; a field winding energized from said additional winding via a rectifier; at least one phase of the additional winding having at least one coil with a reduced number of turns as compared with the number of turns in the remaining coils of the same phase, and the number of turns in that coil can be reduced to zero.
Claim 2
Dependent Claim
100 words
An excitation system for a synchronous machine, comprising: a main armature winding located jointly with a multi-phase additional winding each phase of which is made up of coils and which is wound for three times as many poles as said armature winding; a field winding energized from said additional winding via a rectifier; at least one phase of the additional winding having at least one coil with a reduced number of turns as compared with the number of turns in the remaining coils of the same phase, and the number of turns in that coil can be reduced to zero.
Claim 3
Dependent Claim
100 words
An excitation system for a synchronous machine, comprising: a main armature winding located jointly with a multi-phase additional winding each phase of which is made up of coils and which is wound for three times as many poles as said armature winding; a field winding energized from said additional winding via a rectifier; at least one phase of the additional winding having at least one coil with a reduced number of turns as compared with the number of turns in the remaining coils of the same phase, and the number of turns in that coil can be reduced to zero.
Claim 4
Dependent Claim
100 words
An excitation system for a synchronous machine, comprising: a main armature winding located jointly with a multi-phase additional winding each phase of which is made up of coils and which is wound for three times as many poles as said armature winding; a field winding energized from said additional winding via a rectifier; at least one phase of the additional winding having at least one coil with a reduced number of turns as compared with the number of turns in the remaining coils of the same phase, and the number of turns in that coil can be reduced to zero.
Claim 5
Dependent Claim
44 words
An excitation system, as in claim 1, in which the armature carries a second additional winding made up of coils filling up the phase belts of said first additional winding, and connected on the d.c. side via a second rectifier to said field winding.
Claim 6
Dependent Claim
38 words
An excitation system, as in claim 1, in which the armature carries a second additional winding made up of coils filling up the phase belts of the said first additional winding and connected in opposition to the latter.
References Cited (Backward Citations)
US3025450A
Cited
US3035222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |