Thermostat with power stealing
A thermostat or other in-line, two-conductor control device employs a power-stealing technique to obtain DC power for its electronic controls where the thermostat wire run has an R wire but no C (common) wire. The controlled switch for a reactive load, such as the gas valve relay or compressor conta...
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| creator | Kadah, Hassan B Wood, Eric Christopher Kadah, Andrew S Cariseo, Michael James |
| description | A thermostat or other in-line, two-conductor control device employs a power-stealing technique to obtain DC power for its electronic controls where the thermostat wire run has an R wire but no C (common) wire. The controlled switch for a reactive load, such as the gas valve relay or compressor contactor, is formed of a pair of power capacitors and a pair of switching transistors or other electronic controlled switches. The conductors for feeding DC power to control electronics are connected with the junctions of the power capacitors and their respective switching transistors. The power capacitors and switching transistors can be configured in respective series combinations, with the series combinations forming a parallel combination. The control device can be considered to have an energy storage and switching arrangement that forms with the load an L-C circuit and an electronic switch in circuit between the energy storage arrangement and the load and can be switched on and off to provide an input to a DC power supply. |
| format | Patent |
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The controlled switch for a reactive load, such as the gas valve relay or compressor contactor, is formed of a pair of power capacitors and a pair of switching transistors or other electronic controlled switches. The conductors for feeding DC power to control electronics are connected with the junctions of the power capacitors and their respective switching transistors. The power capacitors and switching transistors can be configured in respective series combinations, with the series combinations forming a parallel combination. The control device can be considered to have an energy storage and switching arrangement that forms with the load an L-C circuit and an electronic switch in circuit between the energy storage arrangement and the load and can be switched on and off to provide an input to a DC power supply.</description><language>eng</language><subject>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING ; BASIC ELECTRONIC CIRCUITRY ; BLASTING ; CONTROLLING ; ELECTRICITY ; HEATING ; LIGHTING ; MECHANICAL ENGINEERING ; PHYSICS ; PULSE TECHNIQUE ; RANGES ; REGULATING ; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES ; VENTILATING ; WEAPONS</subject><creationdate>2019</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=20190423&DB=EPODOC&CC=US&NR=10267532B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20190423&DB=EPODOC&CC=US&NR=10267532B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Kadah, Hassan B</creatorcontrib><creatorcontrib>Wood, Eric Christopher</creatorcontrib><creatorcontrib>Kadah, Andrew S</creatorcontrib><creatorcontrib>Cariseo, Michael James</creatorcontrib><title>Thermostat with power stealing</title><description>A thermostat or other in-line, two-conductor control device employs a power-stealing technique to obtain DC power for its electronic controls where the thermostat wire run has an R wire but no C (common) wire. The controlled switch for a reactive load, such as the gas valve relay or compressor contactor, is formed of a pair of power capacitors and a pair of switching transistors or other electronic controlled switches. The conductors for feeding DC power to control electronics are connected with the junctions of the power capacitors and their respective switching transistors. The power capacitors and switching transistors can be configured in respective series combinations, with the series combinations forming a parallel combination. 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The controlled switch for a reactive load, such as the gas valve relay or compressor contactor, is formed of a pair of power capacitors and a pair of switching transistors or other electronic controlled switches. The conductors for feeding DC power to control electronics are connected with the junctions of the power capacitors and their respective switching transistors. The power capacitors and switching transistors can be configured in respective series combinations, with the series combinations forming a parallel combination. The control device can be considered to have an energy storage and switching arrangement that forms with the load an L-C circuit and an electronic switch in circuit between the energy storage arrangement and the load and can be switched on and off to provide an input to a DC power supply.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BASIC ELECTRONIC CIRCUITRY BLASTING CONTROLLING ELECTRICITY HEATING LIGHTING MECHANICAL ENGINEERING PHYSICS PULSE TECHNIQUE RANGES REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES VENTILATING WEAPONS |
| title | Thermostat with power stealing |
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