Power conversion device
An object is to reduce a discharging time required for discharging residual charges of a capacitor. A power conversion device according to the present invention includes: an inverter circuit unit; a step-up circuit unit; a smoothing capacitor; and a step-up circuit control unit which controls the st...
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| creator | Tamura, Hiroshi Yamada, Hiroyuki Yaegaki, Sho Akasaka, Nobuhiro Matsuo, Takeshi |
| description | An object is to reduce a discharging time required for discharging residual charges of a capacitor. A power conversion device according to the present invention includes: an inverter circuit unit; a step-up circuit unit; a smoothing capacitor; and a step-up circuit control unit which controls the step-up circuit unit, wherein the step-up circuit unit has a first switching element, a second switching element connected electrically in series to the first switching element, and a reactor having a conducting current controlled by switching operation of the first switching element and the second switching element, and the step-up circuit control unit has a first control mode of controlling the switching operation of the first switching element and the second switching element by changing a duty command value and outputting a stepped up voltage from the step-up circuit unit, and a discharge control mode of discharging electric charges stored in the smoothing capacitor into the reactor, with the duty command value fixed to a predetermined value. |
| format | Patent |
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A power conversion device according to the present invention includes: an inverter circuit unit; a step-up circuit unit; a smoothing capacitor; and a step-up circuit control unit which controls the step-up circuit unit, wherein the step-up circuit unit has a first switching element, a second switching element connected electrically in series to the first switching element, and a reactor having a conducting current controlled by switching operation of the first switching element and the second switching element, and the step-up circuit control unit has a first control mode of controlling the switching operation of the first switching element and the second switching element by changing a duty command value and outputting a stepped up voltage from the step-up circuit unit, and a discharge control mode of discharging electric charges stored in the smoothing capacitor into the reactor, with the duty command value fixed to a predetermined value.</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 THEREOF ; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ; ELECTRICITY ; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL ; GENERATION ; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES ; PERFORMING OPERATIONS ; TRANSPORTING ; VEHICLES IN GENERAL</subject><creationdate>2018</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=20180424&DB=EPODOC&CC=US&NR=9950627B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76294</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180424&DB=EPODOC&CC=US&NR=9950627B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Tamura, Hiroshi</creatorcontrib><creatorcontrib>Yamada, Hiroyuki</creatorcontrib><creatorcontrib>Yaegaki, Sho</creatorcontrib><creatorcontrib>Akasaka, Nobuhiro</creatorcontrib><creatorcontrib>Matsuo, Takeshi</creatorcontrib><title>Power conversion device</title><description>An object is to reduce a discharging time required for discharging residual charges of a capacitor. A power conversion device according to the present invention includes: an inverter circuit unit; a step-up circuit unit; a smoothing capacitor; and a step-up circuit control unit which controls the step-up circuit unit, wherein the step-up circuit unit has a first switching element, a second switching element connected electrically in series to the first switching element, and a reactor having a conducting current controlled by switching operation of the first switching element and the second switching element, and the step-up circuit control unit has a first control mode of controlling the switching operation of the first switching element and the second switching element by changing a duty command value and outputting a stepped up voltage from the step-up circuit unit, and a discharge control mode of discharging electric charges stored in the smoothing capacitor into the reactor, with the duty command value fixed to a predetermined value.</description><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</subject><subject>CONTROL OR REGULATION THEREOF</subject><subject>CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES</subject><subject>ELECTRICITY</subject><subject>ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL</subject><subject>GENERATION</subject><subject>MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES</subject><subject>PERFORMING OPERATIONS</subject><subject>TRANSPORTING</subject><subject>VEHICLES IN GENERAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2018</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBAPyC9PLVJIzs8rSy0qzszPU0hJLctMTuVhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGhwZaWpgZmRuZORsZEKAEAnaAh3w</recordid><startdate>20180424</startdate><enddate>20180424</enddate><creator>Tamura, Hiroshi</creator><creator>Yamada, Hiroyuki</creator><creator>Yaegaki, Sho</creator><creator>Akasaka, Nobuhiro</creator><creator>Matsuo, Takeshi</creator><scope>EVB</scope></search><sort><creationdate>20180424</creationdate><title>Power conversion device</title><author>Tamura, Hiroshi ; Yamada, Hiroyuki ; Yaegaki, Sho ; Akasaka, Nobuhiro ; Matsuo, Takeshi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US9950627B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2018</creationdate><topic>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</topic><topic>CONTROL OR REGULATION THEREOF</topic><topic>CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES</topic><topic>ELECTRICITY</topic><topic>ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL</topic><topic>GENERATION</topic><topic>MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES</topic><topic>PERFORMING OPERATIONS</topic><topic>TRANSPORTING</topic><topic>VEHICLES IN GENERAL</topic><toplevel>online_resources</toplevel><creatorcontrib>Tamura, Hiroshi</creatorcontrib><creatorcontrib>Yamada, Hiroyuki</creatorcontrib><creatorcontrib>Yaegaki, Sho</creatorcontrib><creatorcontrib>Akasaka, Nobuhiro</creatorcontrib><creatorcontrib>Matsuo, Takeshi</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Tamura, Hiroshi</au><au>Yamada, Hiroyuki</au><au>Yaegaki, Sho</au><au>Akasaka, Nobuhiro</au><au>Matsuo, Takeshi</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Power conversion device</title><date>2018-04-24</date><risdate>2018</risdate><abstract>An object is to reduce a discharging time required for discharging residual charges of a capacitor. A power conversion device according to the present invention includes: an inverter circuit unit; a step-up circuit unit; a smoothing capacitor; and a step-up circuit control unit which controls the step-up circuit unit, wherein the step-up circuit unit has a first switching element, a second switching element connected electrically in series to the first switching element, and a reactor having a conducting current controlled by switching operation of the first switching element and the second switching element, and the step-up circuit control unit has a first control mode of controlling the switching operation of the first switching element and the second switching element by changing a duty command value and outputting a stepped up voltage from the step-up circuit unit, and a discharge control mode of discharging electric charges stored in the smoothing capacitor into the reactor, with the duty command value fixed to a predetermined value.</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 THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TRANSPORTING VEHICLES IN GENERAL |
| title | Power conversion device |
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