AD CONVERSION CONTROL CIRCUIT AND RELATED TECHNOLOGY THEREOF
PROBLEM TO BE SOLVED: To solve the following problem: when carrying out inverter control with higher accuracy, it is required to shorten a carrier frequency and carry out complicated computation using CPU and thus shorten an AD conversion time; in present AD conversion control circuits, it is possib...
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| creator | AZUMA KATSUJI |
| description | PROBLEM TO BE SOLVED: To solve the following problem: when carrying out inverter control with higher accuracy, it is required to shorten a carrier frequency and carry out complicated computation using CPU and thus shorten an AD conversion time; in present AD conversion control circuits, it is possible only to set a channel on which conversion is started and a channel on which conversion is terminated and it is impossible to select optimal two phases corresponding to a state with hardware; and, therefore, there is no choice but carrying out AD conversion of three phases and it takes time more than necessary to carry out AD conversion. SOLUTION: An AD conversion circuit includes: a selector 11 for selecting a signal to be input to an AD converter 12 from among multiple analog input signals Sa; an AD conversion timing control circuit 14 that controls timing with which the AD converter starts AD conversion; a duty ratio comparison circuit 17 that compares the values on the three duty ratio setting registers of a PWM circuit 10a; and an AD conversion channel selection circuit 15 that selects two channels for controlling the selector 11 on which AD conversion is carried out based on the result of the comparison. COPYRIGHT: (C)2008,JPO&INPIT |
| format | Patent |
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SOLUTION: An AD conversion circuit includes: a selector 11 for selecting a signal to be input to an AD converter 12 from among multiple analog input signals Sa; an AD conversion timing control circuit 14 that controls timing with which the AD converter starts AD conversion; a duty ratio comparison circuit 17 that compares the values on the three duty ratio setting registers of a PWM circuit 10a; and an AD conversion channel selection circuit 15 that selects two channels for controlling the selector 11 on which AD conversion is carried out based on the result of the comparison. COPYRIGHT: (C)2008,JPO&INPIT</description><language>eng</language><subject>APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS ; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS ; CONTROL OR REGULATION THEREOF ; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; GENERATION</subject><creationdate>2008</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=20080821&DB=EPODOC&CC=JP&NR=2008193825A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20080821&DB=EPODOC&CC=JP&NR=2008193825A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>AZUMA KATSUJI</creatorcontrib><title>AD CONVERSION CONTROL CIRCUIT AND RELATED TECHNOLOGY THEREOF</title><description>PROBLEM TO BE SOLVED: To solve the following problem: when carrying out inverter control with higher accuracy, it is required to shorten a carrier frequency and carry out complicated computation using CPU and thus shorten an AD conversion time; in present AD conversion control circuits, it is possible only to set a channel on which conversion is started and a channel on which conversion is terminated and it is impossible to select optimal two phases corresponding to a state with hardware; and, therefore, there is no choice but carrying out AD conversion of three phases and it takes time more than necessary to carry out AD conversion. SOLUTION: An AD conversion circuit includes: a selector 11 for selecting a signal to be input to an AD converter 12 from among multiple analog input signals Sa; an AD conversion timing control circuit 14 that controls timing with which the AD converter starts AD conversion; a duty ratio comparison circuit 17 that compares the values on the three duty ratio setting registers of a PWM circuit 10a; and an AD conversion channel selection circuit 15 that selects two channels for controlling the selector 11 on which AD conversion is carried out based on the result of the comparison. 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SOLUTION: An AD conversion circuit includes: a selector 11 for selecting a signal to be input to an AD converter 12 from among multiple analog input signals Sa; an AD conversion timing control circuit 14 that controls timing with which the AD converter starts AD conversion; a duty ratio comparison circuit 17 that compares the values on the three duty ratio setting registers of a PWM circuit 10a; and an AD conversion channel selection circuit 15 that selects two channels for controlling the selector 11 on which AD conversion is carried out based on the result of the comparison. COPYRIGHT: (C)2008,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION |
| title | AD CONVERSION CONTROL CIRCUIT AND RELATED TECHNOLOGY THEREOF |
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