Electrohydraulic speed controller employed in hydroturbines
Abstract
Abstract AN ELECTROHYDRAULIC SPEED CONTROLLER FOR A HYDROTURBINE COMPRISES AN ELECTRICAL MEASURING UNIT COUPLED TO A MAGNETIC AMPLIFIER IN TURN COUPLED TO A HYDROMECHANICAL ACTUATOR VIA AN ELECTROHYDRAULIC CONVERTER. THE ACTUATOR INCLUDES A MAIN SERVOMECHANISM AND AN AUXILIARY SERVOMECHANISM BOTH ADAPTED TO VARY THE DEGREE OF OPENING OF THE GATE APPARATUS OF THE HYDROTURBINE. A PROPORTIONAL FEEDBACK AND A PI-FEEDBACK ARE CONNECTED TO THE MAIN SERVOMECHANISM, AND THE PI-FEEDBACK INCORPORATES A PASSIVE CORRECTIVE NETWORK CONNECTED IN SERIES WITH THE CON- TROL WINDINGS OF THE MAGNETIC AMPLIFIER. THE PASSIVE CORRECTIVE NETWORK INCLUDES A DIFFERENTIATING SECTION, AN INTEGRATING SECTION AND ANOTHER DIFFERENTIATING SECTION CONNECTED IN SERIES IN THE ABOVE ORDER, ALL SECTIONS INCLUDING RC ELEMENTS.
Inventors
- 👤 Veniamin Anatolievich Marbukh
- 👤 Veniamin Samuilovich Lychak
- 👤 Lazar Ilich Paikin
- 👤 Vladimir Alexeevich Matveev
- 👤 Vasily Vasilievich Semenov
- 👤 Emil Fedorovich Stepura
- 👤 Vasily Nikolaevich Fedorov
Bibliographic Details
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |