Accurate current sensing with heat transfer correction
In one embodiment, a current sensing circuit corrects for the transient and steady state temperature measurement errors due to physical separation between a resistive sense element and a temperature sensor. The sense element has a temperature coefficient of resistance. The voltage across the sense e...
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| creator | MALONEY MATTHEW J PORTER EDSON W POLLARD CHRISTOPHER LAZAROV KALIN V |
| description | In one embodiment, a current sensing circuit corrects for the transient and steady state temperature measurement errors due to physical separation between a resistive sense element and a temperature sensor. The sense element has a temperature coefficient of resistance. The voltage across the sense element and a temperature signal from the temperature sensor are received by processing circuitry. The processing circuitry determines a power dissipated by the sense element, which may be instantaneous or average power, and determines an increased temperature of the sense element. The resistance of the sense element is changed by the increased temperature, and this derived resistance Rs is used to calculate the current through the sense element using the equation I=V/R or other related equation. The process is iterative to continuously improve accuracy and update the current. |
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| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_US8920026B2</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>US8920026B2</sourcerecordid><originalsourceid>FETCH-epo_espacenet_US8920026B23</originalsourceid><addsrcrecordid>eNrjZDBzTE4uLUosSVUAUkWpeSUKxal5xZl56QrlmSUZChmpiSUKJUWJecVpqUUKyflAJcklmfl5PAysaYk5xam8UJqbQcHNNcTZQze1ID8-tbggMTk1L7UkPjTYwtLIwMDIzMnImAglAHf2LcI</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Accurate current sensing with heat transfer correction</title><source>esp@cenet</source><creator>MALONEY MATTHEW J ; PORTER EDSON W ; POLLARD CHRISTOPHER ; LAZAROV KALIN V</creator><creatorcontrib>MALONEY MATTHEW J ; PORTER EDSON W ; POLLARD CHRISTOPHER ; LAZAROV KALIN V</creatorcontrib><description>In one embodiment, a current sensing circuit corrects for the transient and steady state temperature measurement errors due to physical separation between a resistive sense element and a temperature sensor. The sense element has a temperature coefficient of resistance. The voltage across the sense element and a temperature signal from the temperature sensor are received by processing circuitry. The processing circuitry determines a power dissipated by the sense element, which may be instantaneous or average power, and determines an increased temperature of the sense element. The resistance of the sense element is changed by the increased temperature, and this derived resistance Rs is used to calculate the current through the sense element using the equation I=V/R or other related equation. The process is iterative to continuously improve accuracy and update the current.</description><language>eng</language><subject>MEASURING ; MEASURING ELECTRIC VARIABLES ; MEASURING MAGNETIC VARIABLES ; MEASURING QUANTITY OF HEAT ; MEASURING TEMPERATURE ; PHYSICS ; TESTING ; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</subject><creationdate>2014</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=20141230&DB=EPODOC&CC=US&NR=8920026B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20141230&DB=EPODOC&CC=US&NR=8920026B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MALONEY MATTHEW J</creatorcontrib><creatorcontrib>PORTER EDSON W</creatorcontrib><creatorcontrib>POLLARD CHRISTOPHER</creatorcontrib><creatorcontrib>LAZAROV KALIN V</creatorcontrib><title>Accurate current sensing with heat transfer correction</title><description>In one embodiment, a current sensing circuit corrects for the transient and steady state temperature measurement errors due to physical separation between a resistive sense element and a temperature sensor. The sense element has a temperature coefficient of resistance. The voltage across the sense element and a temperature signal from the temperature sensor are received by processing circuitry. The processing circuitry determines a power dissipated by the sense element, which may be instantaneous or average power, and determines an increased temperature of the sense element. The resistance of the sense element is changed by the increased temperature, and this derived resistance Rs is used to calculate the current through the sense element using the equation I=V/R or other related equation. The process is iterative to continuously improve accuracy and update the current.</description><subject>MEASURING</subject><subject>MEASURING ELECTRIC VARIABLES</subject><subject>MEASURING MAGNETIC VARIABLES</subject><subject>MEASURING QUANTITY OF HEAT</subject><subject>MEASURING TEMPERATURE</subject><subject>PHYSICS</subject><subject>TESTING</subject><subject>THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2014</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDBzTE4uLUosSVUAUkWpeSUKxal5xZl56QrlmSUZChmpiSUKJUWJecVpqUUKyflAJcklmfl5PAysaYk5xam8UJqbQcHNNcTZQze1ID8-tbggMTk1L7UkPjTYwtLIwMDIzMnImAglAHf2LcI</recordid><startdate>20141230</startdate><enddate>20141230</enddate><creator>MALONEY MATTHEW J</creator><creator>PORTER EDSON W</creator><creator>POLLARD CHRISTOPHER</creator><creator>LAZAROV KALIN V</creator><scope>EVB</scope></search><sort><creationdate>20141230</creationdate><title>Accurate current sensing with heat transfer correction</title><author>MALONEY MATTHEW J ; PORTER EDSON W ; POLLARD CHRISTOPHER ; LAZAROV KALIN V</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US8920026B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2014</creationdate><topic>MEASURING</topic><topic>MEASURING ELECTRIC VARIABLES</topic><topic>MEASURING MAGNETIC VARIABLES</topic><topic>MEASURING QUANTITY OF HEAT</topic><topic>MEASURING TEMPERATURE</topic><topic>PHYSICS</topic><topic>TESTING</topic><topic>THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</topic><toplevel>online_resources</toplevel><creatorcontrib>MALONEY MATTHEW J</creatorcontrib><creatorcontrib>PORTER EDSON W</creatorcontrib><creatorcontrib>POLLARD CHRISTOPHER</creatorcontrib><creatorcontrib>LAZAROV KALIN V</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>MALONEY MATTHEW J</au><au>PORTER EDSON W</au><au>POLLARD CHRISTOPHER</au><au>LAZAROV KALIN V</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Accurate current sensing with heat transfer correction</title><date>2014-12-30</date><risdate>2014</risdate><abstract>In one embodiment, a current sensing circuit corrects for the transient and steady state temperature measurement errors due to physical separation between a resistive sense element and a temperature sensor. The sense element has a temperature coefficient of resistance. The voltage across the sense element and a temperature signal from the temperature sensor are received by processing circuitry. The processing circuitry determines a power dissipated by the sense element, which may be instantaneous or average power, and determines an increased temperature of the sense element. The resistance of the sense element is changed by the increased temperature, and this derived resistance Rs is used to calculate the current through the sense element using the equation I=V/R or other related equation. The process is iterative to continuously improve accuracy and update the current.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR |
| title | Accurate current sensing with heat transfer correction |
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