US3098959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting circuit for a synchronous motor
Assignee: General Electric Co
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Filing: 1961-01-06
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Granted: 1963-07-23
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Expires: 1981-01-06
Abstract
No abstract record available.
Inventors
- 👤 Jr George M Rosenberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:12
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/0805; H02P; H02P1/00; H02P1/16; H02P1/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A BRUSHLESS SYNCHRONOUS MACHINE COMPRISING A SYNCHRONOUS MOTOR AND AN EXCITER, EACH BEING EQUIPPED WITH WINDINGS AND WHEREIN THE ROTATING MAGNETIC CORES FOR BOTH THE MOTOR AND EXCITER ARE MOUNTED ON THE SAME SHAFT, RECTIFIERS MOUNTED ON THE SHAFT FOR RECTIFYING THE EXCITER OUTPUT AND PROVIDING DIRECT CURRENT TO THE FIELD WINDING THE MOTOR, THE IMPROVEMENT COMPRISING AT LEAST ONE UNIDIRECTIONAL SWITCHING DEVICE MOUNTED ON THE SHAFT AND CONNECTED ACROSS EACH OF THE MOTOR FIELD WINDING AND THE EXCITER OUTPUT TERMINALS FOR FURNISHING A PATH FOR ONE POLARITY OF INDUCED FIELD CURRENT WHILE THE OTHER POLARITY IS CARRIED BY THE EXCITER DURING STARTING.
Claim 2
Dependent Claim
103 words
A BRUSHLESS SYNCHRONOUS MACHINE COMPRISING A SYNCHRONOUS MOTOR AND AN EXCITER, EACH BEING EQUIPPED WITH WINDINGS AND WHEREIN THE ROTATING MAGNETIC CORES FOR BOTH THE MOTOR AND EXCITER ARE MOUNTED ON THE SAME SHAFT, RECTIFIERS MOUNTED ON THE SHAFT FOR RECTIFYING THE EXCITER OUTPUT AND PROVIDING DIRECT CURRENT TO THE FIELD WINDING THE MOTOR, THE IMPROVEMENT COMPRISING AT LEAST ONE UNIDIRECTIONAL SWITCHING DEVICE MOUNTED ON THE SHAFT AND CONNECTED ACROSS EACH OF THE MOTOR FIELD WINDING AND THE EXCITER OUTPUT TERMINALS FOR FURNISHING A PATH FOR ONE POLARITY OF INDUCED FIELD CURRENT WHILE THE OTHER POLARITY IS CARRIED BY THE EXCITER DURING STARTING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |