DEVICE FOR CONTROLLING POWER CONVERSION APPARATUS
The present invention is a direct-power converter control device that enables driving of a motor with high efficiency. A rectified voltage obtained by full-wave rectifying a single-phase AC voltage is applied across first and second DC power supply lines. A discharge switch and a capacitor are conne...
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| creator | ISHIZEKI Shinichi HIRAOKA Nobuyasu |
| description | The present invention is a direct-power converter control device that enables driving of a motor with high efficiency. A rectified voltage obtained by full-wave rectifying a single-phase AC voltage is applied across first and second DC power supply lines. A discharge switch and a capacitor are connected in series to each other between the first and second DC power supply lines. A boost circuit boosts the rectified voltage to charge the capacitor. An inverter receives, as an input, the rectified voltage as a DC voltage when the discharge switch is not conducting, receives, as an input, a voltage across the capacitor as the DC voltage when the discharge switch is conducting, converts the DC voltage as input into an AC voltage, and outputs the AC voltage to the motor. A switch control unit maintains the discharge switch not conducting over a first time period, and switches the discharge switch between conducting and not conducting in a second time period other than the first time period. A charge and discharge time period setting unit sets the first time period when a rotational speed of the motor is higher than a speed threshold shorter than the first time period when the rotational speed is lower than the speed threshold. |
| format | Patent |
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A rectified voltage obtained by full-wave rectifying a single-phase AC voltage is applied across first and second DC power supply lines. A discharge switch and a capacitor are connected in series to each other between the first and second DC power supply lines. A boost circuit boosts the rectified voltage to charge the capacitor. An inverter receives, as an input, the rectified voltage as a DC voltage when the discharge switch is not conducting, receives, as an input, a voltage across the capacitor as the DC voltage when the discharge switch is conducting, converts the DC voltage as input into an AC voltage, and outputs the AC voltage to the motor. A switch control unit maintains the discharge switch not conducting over a first time period, and switches the discharge switch between conducting and not conducting in a second time period other than the first time period. A charge and discharge time period setting unit sets the first time period when a rotational speed of the motor is higher than a speed threshold shorter than the first time period when the rotational speed is lower than the speed threshold.</description><language>eng ; fre ; ger</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>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=20181107&DB=EPODOC&CC=EP&NR=3399643A4$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20181107&DB=EPODOC&CC=EP&NR=3399643A4$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ISHIZEKI Shinichi</creatorcontrib><creatorcontrib>HIRAOKA Nobuyasu</creatorcontrib><title>DEVICE FOR CONTROLLING POWER CONVERSION APPARATUS</title><description>The present invention is a direct-power converter control device that enables driving of a motor with high efficiency. A rectified voltage obtained by full-wave rectifying a single-phase AC voltage is applied across first and second DC power supply lines. A discharge switch and a capacitor are connected in series to each other between the first and second DC power supply lines. A boost circuit boosts the rectified voltage to charge the capacitor. An inverter receives, as an input, the rectified voltage as a DC voltage when the discharge switch is not conducting, receives, as an input, a voltage across the capacitor as the DC voltage when the discharge switch is conducting, converts the DC voltage as input into an AC voltage, and outputs the AC voltage to the motor. A switch control unit maintains the discharge switch not conducting over a first time period, and switches the discharge switch between conducting and not conducting in a second time period other than the first time period. A charge and discharge time period setting unit sets the first time period when a rotational speed of the motor is higher than a speed threshold shorter than the first time period when the rotational speed is lower than the speed threshold.</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 OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</subject><subject>CONTROL OR REGULATION THEREOF</subject><subject>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</subject><subject>CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>GENERATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2018</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDB0cQ3zdHZVcPMPUnD29wsJ8vfx8fRzVwjwD3cFi4S5BgV7-vspOAYEOAY5hoQG8zCwpiXmFKfyQmluBgU31xBnD93Ugvz41OKCxOTUvNSSeNcAY2NLSzMTY0cTYyKUAAAq4CaW</recordid><startdate>20181107</startdate><enddate>20181107</enddate><creator>ISHIZEKI Shinichi</creator><creator>HIRAOKA Nobuyasu</creator><scope>EVB</scope></search><sort><creationdate>20181107</creationdate><title>DEVICE FOR CONTROLLING POWER CONVERSION APPARATUS</title><author>ISHIZEKI Shinichi ; HIRAOKA Nobuyasu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP3399643A43</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</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 OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</topic><topic>CONTROL OR REGULATION THEREOF</topic><topic>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</topic><topic>CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>GENERATION</topic><toplevel>online_resources</toplevel><creatorcontrib>ISHIZEKI Shinichi</creatorcontrib><creatorcontrib>HIRAOKA Nobuyasu</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ISHIZEKI Shinichi</au><au>HIRAOKA Nobuyasu</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>DEVICE FOR CONTROLLING POWER CONVERSION APPARATUS</title><date>2018-11-07</date><risdate>2018</risdate><abstract>The present invention is a direct-power converter control device that enables driving of a motor with high efficiency. A rectified voltage obtained by full-wave rectifying a single-phase AC voltage is applied across first and second DC power supply lines. A discharge switch and a capacitor are connected in series to each other between the first and second DC power supply lines. A boost circuit boosts the rectified voltage to charge the capacitor. An inverter receives, as an input, the rectified voltage as a DC voltage when the discharge switch is not conducting, receives, as an input, a voltage across the capacitor as the DC voltage when the discharge switch is conducting, converts the DC voltage as input into an AC voltage, and outputs the AC voltage to the motor. A switch control unit maintains the discharge switch not conducting over a first time period, and switches the discharge switch between conducting and not conducting in a second time period other than the first time period. A charge and discharge time period setting unit sets the first time period when a rotational speed of the motor is higher than a speed threshold shorter than the first time period when the rotational speed is lower than the speed threshold.</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 | DEVICE FOR CONTROLLING POWER CONVERSION APPARATUS |
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