Induction generator excitation system
Patent 4006399 Issued on February 1, 1977. Estimated Expiration Date: 
February 1, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 1, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2611122 3829758 InventorApplicationNo. 613148 filed on 09/15/1975US Classes:322/47, Induction generator322/28, Voltage of generator or circuit supplied322/94Circuit-making and/or breakingExaminersPrimary: Hickey, Robert J.Attorney, Agent or FirmAbstractA background discussion of induction machine equivalent circuits, including operation as an induction generator, is provided. Selective shorting of the machine terminals is described, to convert at least some of the mechanical input energy into electrical field energy for the machine. Systems are described for accomplishing the selective shorting with a single-phase machine, including sensing of the zero-crossing of the output voltage to insure that the shorting is effected at the appropriate time to replenish the field. The shorting time duration can be varied as a function of load. A three-phase shorting circuit is also described. | |
