초록 ▼

In a power distribution system, synchronizing switchgear operations with an AC voltage or current waveform can be accomplished more precisely with a closed-loop feedback, microprocessor-based motion control design. By employing a closed-loop feedback, microprocessor-based design, switchgear contact

In a power distribution system, synchronizing switchgear operations with an AC voltage or current waveform can be accomplished more precisely with a closed-loop feedback, microprocessor-based motion control design. By employing a closed-loop feedback, microprocessor-based design, switchgear contact position and velocity can be monitored and optimized in real time during a switching operation, thereby assuring a more accurate switching operation. Moreover, the closed-loop feedback design intrinsically compensates for the effects of such things as ambient temperature, AC waveform fluctuations, and changes in the physical condition of the switchgear. The closed-loop position feedback design is also capable of optimizing various transfer function parameters associated with the closed-loop feedback process, both during and subsequent to a switching operation, to further assure that switching operations are more accurately synchronized with the AC voltage or current waveforms.

대표청구항 ▼

[ What is claimed is:] [1.]1. A closed-loop feedback control system for electrical switchgear comprising:a microprocessor;a current generation means, operatively coupled to said microprocessor, for providing a driving current required to regulate an actuator for moving at least one of two switchgear

[ What is claimed is:] [1.]1. A closed-loop feedback control system for electrical switchgear comprising:a microprocessor;a current generation means, operatively coupled to said microprocessor, for providing a driving current required to regulate an actuator for moving at least one of two switchgear contacts in the electrical switchgear; anda position feedback means, operatively coupled to the at least one of two contacts, for repeatedly sampling position information of the at least one of two contacts and providing contact position information to the microprocessor,wherein said microprocessor comprises means for controlling said current generation means in real-time, during a switching operation, as a function of an initial contact position and a present contact position, as provided by said position feedback means, such that the at least one contact transitions from the initial contact position to a final contact position in accordance with a pre-defined motion profile so as to provide AC waveform synchronized switching.