US3477015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator for multi-phase variable speed,variable frequency generator,particularly for automotive use
Assignee: Robert Bosch GmbH
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Filing: 1967-01-23
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Granted: 1969-11-04
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Expires: 1987-01-23
Abstract
Abstract Field current for a three phase automotive type generator is controlled, to maintain the voltage at the nominal level, by supplying the field coil through a pair of SCR's from two of the three phases; the third phase is used to derive a signal varying in amplitude with time, during anyone cycle in synchronism with the frequency of the generator; the amplitude of this time-varying signal is compared with a reference and the firing point of the SCR's within anyone cycle is controlled by coincidence of the reference with the varying amplitude of the time-varying signal obtained from the third phase.
Inventors
- 👤 Edgar Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:29
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/26; H02P9/30; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/24; H02J7/2437; H02P9/305; H02P2101/00; H02P2101/30; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3226626A
Cited
US3121836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |