Method for starting pulse width modulation

A method for starting the modulation of a frequency converter, which method comprises the steps of receiving reference voltages (sa, sb, sc; Uref), generating output switch commands from the reference voltages. The generation of output switch commands comprises further a step, in which the ratio (dz...

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1. Verfasser:	SALOMAEKI JANNE
Format:	Patent
Sprache:	eng
Schlagworte:	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 ELECTRICITY GENERATION
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creator	SALOMAEKI JANNE
description	A method for starting the modulation of a frequency converter, which method comprises the steps of receiving reference voltages (sa, sb, sc; Uref), generating output switch commands from the reference voltages. The generation of output switch commands comprises further a step, in which the ratio (dz) of active time (T0+) in a modulation period (Ts) of selected zero vector and the total active time (T0++T0-) of zero vectors in a modulation period is changed from a first predetermined ratio, which is substantially 0 or 1, to a second predetermined ratio, which is substantially 0.5.
format	Patent
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The generation of output switch commands comprises further a step, in which the ratio (dz) of active time (T0+) in a modulation period (Ts) of selected zero vector and the total active time (T0++T0-) of zero vectors in a modulation period is changed from a first predetermined ratio, which is substantially 0 or 1, to a second predetermined ratio, which is substantially 0.5.</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 ; ELECTRICITY ; GENERATION</subject><creationdate>2009</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=20090915&DB=EPODOC&CC=US&NR=7589984B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20090915&DB=EPODOC&CC=US&NR=7589984B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SALOMAEKI JANNE</creatorcontrib><title>Method for starting pulse width modulation</title><description>A method for starting the modulation of a frequency converter, which method comprises the steps of receiving reference voltages (sa, sb, sc; Uref), generating output switch commands from the reference voltages. The generation of output switch commands comprises further a step, in which the ratio (dz) of active time (T0+) in a modulation period (Ts) of selected zero vector and the total active time (T0++T0-) of zero vectors in a modulation period is changed from a first predetermined ratio, which is substantially 0 or 1, to a second predetermined ratio, which is substantially 0.5.</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>ELECTRICITY</subject><subject>GENERATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2009</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNDyTS3JyE9RSMsvUiguSSwqycxLVygozSlOVSjPTCnJUMjNTynNSSzJzM_jYWBNSwRK8EJpbgYFN9cQZw_d1IL8-NTigsTk1LzUkvjQYHNTC0tLCxMnI2MilAAAAwIpQA</recordid><startdate>20090915</startdate><enddate>20090915</enddate><creator>SALOMAEKI JANNE</creator><scope>EVB</scope></search><sort><creationdate>20090915</creationdate><title>Method for starting pulse width modulation</title><author>SALOMAEKI JANNE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US7589984B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2009</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>ELECTRICITY</topic><topic>GENERATION</topic><toplevel>online_resources</toplevel><creatorcontrib>SALOMAEKI JANNE</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SALOMAEKI JANNE</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method for starting pulse width modulation</title><date>2009-09-15</date><risdate>2009</risdate><abstract>A method for starting the modulation of a frequency converter, which method comprises the steps of receiving reference voltages (sa, sb, sc; Uref), generating output switch commands from the reference voltages. The generation of output switch commands comprises further a step, in which the ratio (dz) of active time (T0+) in a modulation period (Ts) of selected zero vector and the total active time (T0++T0-) of zero vectors in a modulation period is changed from a first predetermined ratio, which is substantially 0 or 1, to a second predetermined ratio, which is substantially 0.5.</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 ELECTRICITY GENERATION
title	Method for starting pulse width modulation
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