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Title:
METHOD FOR GENERATING REVOLUTION SYNCHRONIZING PULSE
Document Type and Number:
Japanese Patent JPS56158921
Kind Code:
A
Abstract:

PURPOSE: To obtain the pulses synchronized to the revolutions of an AC generator for diagnosis without stopping of the rotary machine by a means of generating pulses at the same phase point of source voltage from a commerical power source.

CONSTITUTION: The AC voltage 4 obtained from a commercial power source in a power station is inputted to a halfwave rectifier circuit 1 in order to obtain one pulse per cycle. Next, the voltage 5 obtained in the circuit 1 is inputted to a comparator circuit. This yields such the voltage signal in which about half period out of one cycle wherein it is the voltage determined by a circuit constant below certain threshold value voltage Vs and is zero output voltage above the threshold value voltage Vs is of a high level and the other half period is of a low level. In this way, the pulses synchronized with the revolutions are obtained easily from the AC generator in a state of parallel operation with the commerical power source.


Inventors:
SENOO MAKOTO
Application Number:
JP6285580A
Publication Date:
December 08, 1981
Filing Date:
May 14, 1980
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
G01M13/04; G01H1/00; G01H17/00; G01M99/00; (IPC1-7): G01H1/00; G01M13/04



 
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