Overcurrent protection circuit
A resistance value variable element ( 18 a) changes its resistance value in response to abnormal exothermic heat caused by an overcurrent of an external electrical equipment ( 3 ). A bias voltage outputted from a bias voltage output circuit ( 18 ) changes in accordance with the change of the resista...
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| creator | ASHIYA HIROYUKI |
| description | A resistance value variable element ( 18 a) changes its resistance value in response to abnormal exothermic heat caused by an overcurrent of an external electrical equipment ( 3 ). A bias voltage outputted from a bias voltage output circuit ( 18 ) changes in accordance with the change of the resistance value. A relay ( 13 ) is controlled so as to be opened/closed in accordance with a switching control signal which is controlled in its supply by a second transistor element ( 17 ) based on the change of the bias voltage. According to such a control, power interruption and automatic restoring can be made possible. In the overcurrent protection circuit having such an automatic restoring function, the resistance value variable element is not connected in series with a coil ( 13 a) unlike the conventional technique but contained in the bias voltage output circuit for supplying the switching control signal for exciting the coil. |
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A bias voltage outputted from a bias voltage output circuit ( 18 ) changes in accordance with the change of the resistance value. A relay ( 13 ) is controlled so as to be opened/closed in accordance with a switching control signal which is controlled in its supply by a second transistor element ( 17 ) based on the change of the bias voltage. According to such a control, power interruption and automatic restoring can be made possible. In the overcurrent protection circuit having such an automatic restoring function, the resistance value variable element is not connected in series with a coil ( 13 a) unlike the conventional technique but contained in the bias voltage output circuit for supplying the switching control signal for exciting the coil.</description><language>eng</language><subject>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS ; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION ; PERFORMING OPERATIONS ; TRANSPORTING ; VEHICLES IN GENERAL ; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR</subject><creationdate>2006</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=20060124&DB=EPODOC&CC=US&NR=6989976B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060124&DB=EPODOC&CC=US&NR=6989976B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ASHIYA HIROYUKI</creatorcontrib><title>Overcurrent protection circuit</title><description>A resistance value variable element ( 18 a) changes its resistance value in response to abnormal exothermic heat caused by an overcurrent of an external electrical equipment ( 3 ). A bias voltage outputted from a bias voltage output circuit ( 18 ) changes in accordance with the change of the resistance value. A relay ( 13 ) is controlled so as to be opened/closed in accordance with a switching control signal which is controlled in its supply by a second transistor element ( 17 ) based on the change of the bias voltage. According to such a control, power interruption and automatic restoring can be made possible. In the overcurrent protection circuit having such an automatic restoring function, the resistance value variable element is not connected in series with a coil ( 13 a) unlike the conventional technique but contained in the bias voltage output circuit for supplying the switching control signal for exciting the coil.</description><subject>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</subject><subject>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</subject><subject>GENERATION</subject><subject>PERFORMING OPERATIONS</subject><subject>TRANSPORTING</subject><subject>VEHICLES IN GENERAL</subject><subject>VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2006</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZJDzL0stSi4tKkrNK1EoKMovSU0uyczPU0jOBIpmlvAwsKYl5hSn8kJpbgYFN9cQZw_d1IL8-NTigsTk1LzUkvjQYDNLC0tLczMnI2MilAAA_golHA</recordid><startdate>20060124</startdate><enddate>20060124</enddate><creator>ASHIYA HIROYUKI</creator><scope>EVB</scope></search><sort><creationdate>20060124</creationdate><title>Overcurrent protection circuit</title><author>ASHIYA HIROYUKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US6989976B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2006</creationdate><topic>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</topic><topic>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</topic><topic>GENERATION</topic><topic>PERFORMING OPERATIONS</topic><topic>TRANSPORTING</topic><topic>VEHICLES IN GENERAL</topic><topic>VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR</topic><toplevel>online_resources</toplevel><creatorcontrib>ASHIYA HIROYUKI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ASHIYA HIROYUKI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Overcurrent protection circuit</title><date>2006-01-24</date><risdate>2006</risdate><abstract>A resistance value variable element ( 18 a) changes its resistance value in response to abnormal exothermic heat caused by an overcurrent of an external electrical equipment ( 3 ). A bias voltage outputted from a bias voltage output circuit ( 18 ) changes in accordance with the change of the resistance value. A relay ( 13 ) is controlled so as to be opened/closed in accordance with a switching control signal which is controlled in its supply by a second transistor element ( 17 ) based on the change of the bias voltage. According to such a control, power interruption and automatic restoring can be made possible. In the overcurrent protection circuit having such an automatic restoring function, the resistance value variable element is not connected in series with a coil ( 13 a) unlike the conventional technique but contained in the bias voltage output circuit for supplying the switching control signal for exciting the coil.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION PERFORMING OPERATIONS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR |
| title | Overcurrent protection circuit |
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