US4268788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A.C. Generator exciting method
Assignee: Denyo Co Ltd
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Filing: 1979-09-19
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Granted: 1981-05-19
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Expires: 1999-09-19
Abstract
Abstract In an a.c. generating means exciting method, the exciting windings are wound on the stationary core on which the armature winding has been wound, in such a manner that the exciting windings are delta-connected to one another with the two ends open, and the zero phase current obtained from the two open ends of the delta-connected exciting windings and the phase current obtained from the exciting windings are combined and subjected to rectification to provide a direct current which is utilized to excite the field winding, whereby the field control is carried out in response to the increasing load current and the transient characteristic of the a.c. generating means is improved.
Inventors
- 👤 Masanobu Takeda
- 👤 Shigeaki Anzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:42
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/26; H02K19/28; H02P; H02P9/00; H02P9/14; H02P9/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A method of exciting an alternating current generating means is which an armature winding and exciting windings are wound on one and the same core in such a manner that said exciting windings are series-connected in the form of delta connection with two ends open, and a zero phase current obtained through said two open ends of said exciting windings in the form of delta connection and a phase current obtained from said exciting windings by utilizing at least one of the delta connection points of said exciting windings are combined and rectified to provide a direct current which is employed to excite said field winding.
Claim 2
Independent Claim
106 words
A method of exciting an alternating current generating means is which an armature winding and exciting windings are wound on one and the same core in such a manner that said exciting windings are series-connected in the form of delta connection with two ends open, and a zero phase current obtained through said two open ends of said exciting windings in the form of delta connection and a phase current obtained from said exciting windings by utilizing at least one of the delta connection points of said exciting windings are combined and rectified to provide a direct current which is employed to excite said field winding.
Claim 3
Dependent Claim
37 words
A method as claimed in claim 1, in which said zero phase current and said phase current are obtained from said exciting winding which is shifted by an angle of substantially 90 degrees from said armature winding.
Claim 4
Dependent Claim
37 words
A method as claimed in claim 1, in which said zero phase current and said phase current are applied to an automatic voltage regulator to provide a direct current which is employed to excite said field winding.
References Cited (Backward Citations)
US3714542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |