Title:
STABILIZING METHOD FOR ALTERNATINGGCURRENT VOLTAGE
Document Type and Number:
Japanese Patent JPS5510644
Kind Code:
A
Abstract:
PURPOSE:To attain precise control by inputting the measurement-value data of an alternating-current power voltage direct as the program data of a microcomputer. CONSTITUTION:Alternating-current power is supplied to zero-cross detection circuit 4 by way of phase control circuit 1, transfromer 2 and full-wave rectifier circuit 3. Zero-cross detection circuit 4 varies in blind sector width according to the variation of input voltage E and periods when an output voltage is developed across detection circuit 4 and when no voltage is developed vary. A zero-cross signal generated by zero-cross detection circuit 4 is detected by CPU5 and at that timing, clock pulses are fetched and counted at the counter 6 side. The count output is supplied to the CPU5 side and on the basis of data stored, the phase control of phase control circuit 1 carried out. In this way, precise control can be attained by inputting measurement- value data as program data.
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Inventors:
KUBOTA YOUICHI
Application Number:
JP8298278A
Publication Date:
January 25, 1980
Filing Date:
July 10, 1978
Export Citation:
Assignee:
RICOH KK
International Classes:
G05F5/00; G05F1/44; (IPC1-7): G05F1/44