Static regenerative control of direct current motors from an a.c. source
Abstract
Abstract A STATIC FULL REVERSING, REGENERATIVE CONTROL SYSTEM FOR CONTROLLING THE OPERATION OF SERIES DIRECT CURRENT MOTORS IN BOTH MOTORING AND REGENERATIVE BRAKING CONDITIONS WHEREIN A SINGLE CONTROLLED RECTIFIER BRIDGE RECTIFIER IS EMPLOYED AND CONTROLLED TO OPERATE AS AN INVERTER DURING REGENERATION SO THAT THE TORQUE OF THE MOTOR MAY BE CONTINUOUSLY CONTROLLED FROM A MAXIMUM POSITIVE VALUE TO A MAXIMUM NEGATIVE VALUE. SMOOTH, CONTROLLABLE TRANSITION IS PROVIDED BETWEEN MOTORING AND REGENERATIVE BRAKING OPERATING CONDITIONS BY A STATIC REVERSIBLE FIELD SWITCHING MEANS AND MAINTENANCE OF THE DIRECTION OF CURRENT IN THE MOTOR ARMATURE CIRCUIT WITH PROVISION FOR LIMITING THE MOTOR CURRENT, MOTOR VOLTAGE AND BOTH POSITIVE AND NEGATIVE RATE-OF-CHANGE OF MOTOR CURRENT.
Inventors
- 👤 William B Zelina
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |