| 摘要 |
PURPOSE:To make a display flexible and to improve its precision more by minimizing input data for the output display of various electric quantities and processing them wholly digitally. CONSTITUTION:Phase voltages vRS, vST, and vTR and phase currents iR, iS, and iT are inputted to an analog multiplexer 17 and then input waveforms of the voltages and currents are digitized by an A/D converter 18 and inputted to a fast processor 21 so that various output quantities of an electric generator are monitored through a detector processor 14 for various electric quantities. Then, arithmetic processing is performed with the output signal of a frequency divider based upon the output signal of a 0-point detector 19 as a reference point and the result is outputted to a memory circuit 23 temporarily. A control processor 22, on the other hand, performs division, etc., and outputs data from the circuit 23 to a peripheral device, an alarm device, etc., at a specific period while fetching the data from the circuit 23. Thus, various electric quantities are monitored and controlled according to the output state of the arithmetic result to perform synthetic monitoring, control, and protection.
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