Electric vehicle motor active short circuit exit control method
The invention discloses an active short circuit quit control method for a motor of an electric vehicle. According to the method, when the motor enters an active short circuit state, capacitor voltage Udc of a bus is discharged to voltage Udcset through a discharging device; a capacitor voltage Udc1...
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| creator | CAO PENGKUN LIU SONGBO HUANG HONGJIAN SUN DONG |
| description | The invention discloses an active short circuit quit control method for a motor of an electric vehicle. According to the method, when the motor enters an active short circuit state, capacitor voltage Udc of a bus is discharged to voltage Udcset through a discharging device; a capacitor voltage Udc1 after discharging is obtained through bus voltage sampling, an inverter power device performs on-off action at a certain duty ratio, and when the power device is closed, if a motor line back electromotive force voltage is higher than the capacitor voltage Udc1 or lower than-Udc1, a motor charges a capacitor through a follow current device in an inverter; after the power device is switched on and off for a period of time, the active short-circuit state is switched back, capacitor voltage Udc2 is read, if Udc1 is larger than Udc2, the rotating speed of the motor is low, the counter electromotive force of a motor line is low, so that the capacitor cannot be charged, the active short-circuit state is quitted, and if Ud |
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According to the method, when the motor enters an active short circuit state, capacitor voltage Udc of a bus is discharged to voltage Udcset through a discharging device; a capacitor voltage Udc1 after discharging is obtained through bus voltage sampling, an inverter power device performs on-off action at a certain duty ratio, and when the power device is closed, if a motor line back electromotive force voltage is higher than the capacitor voltage Udc1 or lower than-Udc1, a motor charges a capacitor through a follow current device in an inverter; after the power device is switched on and off for a period of time, the active short-circuit state is switched back, capacitor voltage Udc2 is read, if Udc1 is larger than Udc2, the rotating speed of the motor is low, the counter electromotive force of a motor line is low, so that the capacitor cannot be charged, the active short-circuit state is quitted, and if Ud</description><language>chi ; eng</language><subject>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS ; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION</subject><creationdate>2022</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=20220527&DB=EPODOC&CC=CN&NR=114552533A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20220527&DB=EPODOC&CC=CN&NR=114552533A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>CAO PENGKUN</creatorcontrib><creatorcontrib>LIU SONGBO</creatorcontrib><creatorcontrib>HUANG HONGJIAN</creatorcontrib><creatorcontrib>SUN DONG</creatorcontrib><title>Electric vehicle motor active short circuit exit control method</title><description>The invention discloses an active short circuit quit control method for a motor of an electric vehicle. According to the method, when the motor enters an active short circuit state, capacitor voltage Udc of a bus is discharged to voltage Udcset through a discharging device; a capacitor voltage Udc1 after discharging is obtained through bus voltage sampling, an inverter power device performs on-off action at a certain duty ratio, and when the power device is closed, if a motor line back electromotive force voltage is higher than the capacitor voltage Udc1 or lower than-Udc1, a motor charges a capacitor through a follow current device in an inverter; after the power device is switched on and off for a period of time, the active short-circuit state is switched back, capacitor voltage Udc2 is read, if Udc1 is larger than Udc2, the rotating speed of the motor is low, the counter electromotive force of a motor line is low, so that the capacitor cannot be charged, the active short-circuit state is quitted, and if Ud</description><subject>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</subject><subject>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</subject><subject>GENERATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2022</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLB3zUlNLinKTFYoS83ITM5JVcjNL8kvUkhMLsksS1UozsgvKlFIzixKLs0sUUitABLJ-XklRfk5CrmpJRn5KTwMrGmJOcWpvFCam0HRzTXE2UM3tSA_PrW4IDE5NS-1JN7Zz9DQxNTUyNTY2NGYGDUAs8wxNw</recordid><startdate>20220527</startdate><enddate>20220527</enddate><creator>CAO PENGKUN</creator><creator>LIU SONGBO</creator><creator>HUANG HONGJIAN</creator><creator>SUN DONG</creator><scope>EVB</scope></search><sort><creationdate>20220527</creationdate><title>Electric vehicle motor active short circuit exit control method</title><author>CAO PENGKUN ; LIU SONGBO ; HUANG HONGJIAN ; SUN DONG</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN114552533A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2022</creationdate><topic>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</topic><topic>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</topic><topic>GENERATION</topic><toplevel>online_resources</toplevel><creatorcontrib>CAO PENGKUN</creatorcontrib><creatorcontrib>LIU SONGBO</creatorcontrib><creatorcontrib>HUANG HONGJIAN</creatorcontrib><creatorcontrib>SUN DONG</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>CAO PENGKUN</au><au>LIU SONGBO</au><au>HUANG HONGJIAN</au><au>SUN DONG</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Electric vehicle motor active short circuit exit control method</title><date>2022-05-27</date><risdate>2022</risdate><abstract>The invention discloses an active short circuit quit control method for a motor of an electric vehicle. According to the method, when the motor enters an active short circuit state, capacitor voltage Udc of a bus is discharged to voltage Udcset through a discharging device; a capacitor voltage Udc1 after discharging is obtained through bus voltage sampling, an inverter power device performs on-off action at a certain duty ratio, and when the power device is closed, if a motor line back electromotive force voltage is higher than the capacitor voltage Udc1 or lower than-Udc1, a motor charges a capacitor through a follow current device in an inverter; after the power device is switched on and off for a period of time, the active short-circuit state is switched back, capacitor voltage Udc2 is read, if Udc1 is larger than Udc2, the rotating speed of the motor is low, the counter electromotive force of a motor line is low, so that the capacitor cannot be charged, the active short-circuit state is quitted, and if Ud</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION |
| title | Electric vehicle motor active short circuit exit control method |
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