THREE-LEVEL POWER CONVERTER
PROBLEM TO BE SOLVED: To prevent discontinuous sound by controlling an output voltage of a three-level inverter from zero to maximum and realizing control of the generation of three-level pulse for continuously and smoothly performing an inverter output voltage. SOLUTION: This three-level power conv...
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| creator | NAKAMURA KIYOSHI SUZUKI MASAHITO TERUNUMA MUTSUHIRO NAKADA KIYOSHI TANAMACHI TOKUNOSUKE TSUTSUI YOSHIO TOYODA EIICHI |
| description | PROBLEM TO BE SOLVED: To prevent discontinuous sound by controlling an output voltage of a three-level inverter from zero to maximum and realizing control of the generation of three-level pulse for continuously and smoothly performing an inverter output voltage. SOLUTION: This three-level power converter includes a power converter for converting a DC power into an AC phase voltage, having three-level potentials that are positive, negative, and intermediate voltages, and a controller for controlling acceleration/deceleration of an AC motor connected to the output side of the power converter. In a low-speed region in acceleration/deceleration control, a first pulse width modulation control region, in which positive/negative voltage pulses are alternately outputted via an intermediate voltage, is given for the whole region of the half period of the output voltage basic wave of the converter. In a high-speed region in the acceleration/deceleration control, a second pulse width modulation control region, which has a first period when the plurality of the voltage pulses of identical polarity are outputted continuously and a second period, when the positive and negative voltage pulses are alternately outputted via the intermediate voltage before/after the first period, is given in the half period of the output voltage basic wave of the converter. COPYRIGHT: (C)2005,JPO&NCIPI |
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| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_JP2005117896A</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>JP2005117896A</sourcerecordid><originalsourceid>FETCH-epo_espacenet_JP2005117896A3</originalsourceid><addsrcrecordid>eNrjZJAO8QhyddX1cQ1z9VEI8A93DVJw9vcLcw0KcQ3iYWBNS8wpTuWF0twMSm6uIc4euqkF-fGpxQWJyal5qSXxXgFGBgamhobmFpZmjsZEKQIAnvAhJg</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>THREE-LEVEL POWER CONVERTER</title><source>esp@cenet</source><creator>NAKAMURA KIYOSHI ; SUZUKI MASAHITO ; TERUNUMA MUTSUHIRO ; NAKADA KIYOSHI ; TANAMACHI TOKUNOSUKE ; TSUTSUI YOSHIO ; TOYODA EIICHI</creator><creatorcontrib>NAKAMURA KIYOSHI ; SUZUKI MASAHITO ; TERUNUMA MUTSUHIRO ; NAKADA KIYOSHI ; TANAMACHI TOKUNOSUKE ; TSUTSUI YOSHIO ; TOYODA EIICHI</creatorcontrib><description>PROBLEM TO BE SOLVED: To prevent discontinuous sound by controlling an output voltage of a three-level inverter from zero to maximum and realizing control of the generation of three-level pulse for continuously and smoothly performing an inverter output voltage. SOLUTION: This three-level power converter includes a power converter for converting a DC power into an AC phase voltage, having three-level potentials that are positive, negative, and intermediate voltages, and a controller for controlling acceleration/deceleration of an AC motor connected to the output side of the power converter. In a low-speed region in acceleration/deceleration control, a first pulse width modulation control region, in which positive/negative voltage pulses are alternately outputted via an intermediate voltage, is given for the whole region of the half period of the output voltage basic wave of the converter. In a high-speed region in the acceleration/deceleration control, a second pulse width modulation control region, which has a first period when the plurality of the voltage pulses of identical polarity are outputted continuously and a second period, when the positive and negative voltage pulses are alternately outputted via the intermediate voltage before/after the first period, is given in the half period of the output voltage basic wave of the converter. COPYRIGHT: (C)2005,JPO&NCIPI</description><edition>7</edition><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>2005</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=20050428&DB=EPODOC&CC=JP&NR=2005117896A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76418</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20050428&DB=EPODOC&CC=JP&NR=2005117896A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>NAKAMURA KIYOSHI</creatorcontrib><creatorcontrib>SUZUKI MASAHITO</creatorcontrib><creatorcontrib>TERUNUMA MUTSUHIRO</creatorcontrib><creatorcontrib>NAKADA KIYOSHI</creatorcontrib><creatorcontrib>TANAMACHI TOKUNOSUKE</creatorcontrib><creatorcontrib>TSUTSUI YOSHIO</creatorcontrib><creatorcontrib>TOYODA EIICHI</creatorcontrib><title>THREE-LEVEL POWER CONVERTER</title><description>PROBLEM TO BE SOLVED: To prevent discontinuous sound by controlling an output voltage of a three-level inverter from zero to maximum and realizing control of the generation of three-level pulse for continuously and smoothly performing an inverter output voltage. SOLUTION: This three-level power converter includes a power converter for converting a DC power into an AC phase voltage, having three-level potentials that are positive, negative, and intermediate voltages, and a controller for controlling acceleration/deceleration of an AC motor connected to the output side of the power converter. In a low-speed region in acceleration/deceleration control, a first pulse width modulation control region, in which positive/negative voltage pulses are alternately outputted via an intermediate voltage, is given for the whole region of the half period of the output voltage basic wave of the converter. In a high-speed region in the acceleration/deceleration control, a second pulse width modulation control region, which has a first period when the plurality of the voltage pulses of identical polarity are outputted continuously and a second period, when the positive and negative voltage pulses are alternately outputted via the intermediate voltage before/after the first period, is given in the half period of the output voltage basic wave of the converter. 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SOLUTION: This three-level power converter includes a power converter for converting a DC power into an AC phase voltage, having three-level potentials that are positive, negative, and intermediate voltages, and a controller for controlling acceleration/deceleration of an AC motor connected to the output side of the power converter. In a low-speed region in acceleration/deceleration control, a first pulse width modulation control region, in which positive/negative voltage pulses are alternately outputted via an intermediate voltage, is given for the whole region of the half period of the output voltage basic wave of the converter. In a high-speed region in the acceleration/deceleration control, a second pulse width modulation control region, which has a first period when the plurality of the voltage pulses of identical polarity are outputted continuously and a second period, when the positive and negative voltage pulses are alternately outputted via the intermediate voltage before/after the first period, is given in the half period of the output voltage basic wave of the converter. COPYRIGHT: (C)2005,JPO&NCIPI</abstract><edition>7</edition><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 | THREE-LEVEL POWER CONVERTER |
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