VOLTAGE DROP DETECTION CIRCUIT
PURPOSE:To bring the delay of a response time based on the time constant of a smoothing circuit to zero and to increase the speed of a detection time, by separating the phase of the AC signal of a commercial power supply into many phases and superposing each of phases to compare the same with a refe...
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| creator | OKAZAWA MASUO |
| description | PURPOSE:To bring the delay of a response time based on the time constant of a smoothing circuit to zero and to increase the speed of a detection time, by separating the phase of the AC signal of a commercial power supply into many phases and superposing each of phases to compare the same with a reference value. CONSTITUTION:In the input of AC to a DC forming circuit 5, predetermined phase shifting quantity is set by phase shifting circuits 2a, 2b and the AC is rectified by rectifying circuits 3a, 3b. As a result, the output of the DC forming circuit 5 becomes signals on which the output signals Sa, Sb of polyphase setting circuits 4a, 4b are superposed to be compared with a preset reference signal Ss by a comparing circuit 6. By this method, a smoothing circuit becomes unnecessary and the output of the DC forming circuit 5 is immediately lowered by the generation of voltage drop and the voltage drop is instantaneously detected by the comparing circuit 6. |
| format | Patent |
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CONSTITUTION:In the input of AC to a DC forming circuit 5, predetermined phase shifting quantity is set by phase shifting circuits 2a, 2b and the AC is rectified by rectifying circuits 3a, 3b. As a result, the output of the DC forming circuit 5 becomes signals on which the output signals Sa, Sb of polyphase setting circuits 4a, 4b are superposed to be compared with a preset reference signal Ss by a comparing circuit 6. By this method, a smoothing circuit becomes unnecessary and the output of the DC forming circuit 5 is immediately lowered by the generation of voltage drop and the voltage drop is instantaneously detected by the comparing circuit 6.</description><language>eng</language><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION ; MEASURING ; MEASURING ELECTRIC VARIABLES ; MEASURING MAGNETIC VARIABLES ; PHYSICS ; TESTING</subject><creationdate>1989</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19890426&DB=EPODOC&CC=JP&NR=H01110266A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25544,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19890426&DB=EPODOC&CC=JP&NR=H01110266A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OKAZAWA MASUO</creatorcontrib><title>VOLTAGE DROP DETECTION CIRCUIT</title><description>PURPOSE:To bring the delay of a response time based on the time constant of a smoothing circuit to zero and to increase the speed of a detection time, by separating the phase of the AC signal of a commercial power supply into many phases and superposing each of phases to compare the same with a reference value. CONSTITUTION:In the input of AC to a DC forming circuit 5, predetermined phase shifting quantity is set by phase shifting circuits 2a, 2b and the AC is rectified by rectifying circuits 3a, 3b. As a result, the output of the DC forming circuit 5 becomes signals on which the output signals Sa, Sb of polyphase setting circuits 4a, 4b are superposed to be compared with a preset reference signal Ss by a comparing circuit 6. 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CONSTITUTION:In the input of AC to a DC forming circuit 5, predetermined phase shifting quantity is set by phase shifting circuits 2a, 2b and the AC is rectified by rectifying circuits 3a, 3b. As a result, the output of the DC forming circuit 5 becomes signals on which the output signals Sa, Sb of polyphase setting circuits 4a, 4b are superposed to be compared with a preset reference signal Ss by a comparing circuit 6. By this method, a smoothing circuit becomes unnecessary and the output of the DC forming circuit 5 is immediately lowered by the generation of voltage drop and the voltage drop is instantaneously detected by the comparing circuit 6.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING |
| title | VOLTAGE DROP DETECTION CIRCUIT |
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