Digitaler phasenangepasster Discriminator für Drehstromversorgung

摘要

Disclosed is a digital phase match discriminator for three-phase power systems. The system includes a "polarity change detector (58)" which detects any change of polarity in any of the three phases of the present or new power source or the load. A "logic network" produces outputs based on the inputs provided from the load and the new source or from both sources and the present source-to-load configuration. The logic network outputs are derived from a known lookup table. The output from the logic network is latched by a sampling clock derived from the "polarity change detector" circuit. The output of the latch provides the best phase-matching solution at any given time.