ELECTRIC WORK MACHINE
To make it possible for a control unit common to each motor to control power supply to each motor by a PWM signal of different carrier frequency in an electric work machine having two motors.SOLUTION: An electric work machine includes: a first and a second motors; a first and a second switches provi...
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| creator | OKAMURA MASAYUKI |
| description | To make it possible for a control unit common to each motor to control power supply to each motor by a PWM signal of different carrier frequency in an electric work machine having two motors.SOLUTION: An electric work machine includes: a first and a second motors; a first and a second switches provided on an energization path from a DC power source to each motor; a first and a second carrier frequency setting units; and a control unit. The first and second carrier frequency setting units set a first and a second carrier frequencies at the time of performing PWM control of power supplied to the first and second motors to a different frequency. The control unit drives the first or the second switch by a PWM signal generated at the first or the second carrier frequency to perform PWM control of the power supplied to the first or second motor.SELECTED DRAWING: Figure 2
【課題】２つのモータを備えた電動作業機において、各モータ共通の制御部が、異なるキャリア周波数のＰＷＭ信号にて各モータへの供給電力を制御できるようにする。【解決手段】電動作業機は、第１及び第２のモータと、直流電源から各モータへの通電経路上に設けられた第１及び第２のスイッチと、第１及び第２のキャリア周波数設定部と、制御部とを備える。第１及び第２のキャリア周波数設定部は、第１及び第２のモータへの供給電力をＰＷＭ制御する際の第１及び第２のキャリア周波数を、異なる周波数に設定する。制御部は、第１又は第２のキャリア周波数にて生成されたＰＷＭ信号にて、第１又は第２のスイッチを駆動し、第１又は第２のモータへの供給電力をＰＷＭ制御する。【選択図】図２ |
| format | Patent |
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【課題】２つのモータを備えた電動作業機において、各モータ共通の制御部が、異なるキャリア周波数のＰＷＭ信号にて各モータへの供給電力を制御できるようにする。【解決手段】電動作業機は、第１及び第２のモータと、直流電源から各モータへの通電経路上に設けられた第１及び第２のスイッチと、第１及び第２のキャリア周波数設定部と、制御部とを備える。第１及び第２のキャリア周波数設定部は、第１及び第２のモータへの供給電力をＰＷＭ制御する際の第１及び第２のキャリア周波数を、異なる周波数に設定する。制御部は、第１又は第２のキャリア周波数にて生成されたＰＷＭ信号にて、第１又は第２のスイッチを駆動し、第１又は第２のモータへの供給電力をＰＷＭ制御する。【選択図】図２</description><language>eng ; jpn</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 ; GENERATION</subject><creationdate>2023</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=20230425&DB=EPODOC&CC=JP&NR=2023058185A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20230425&DB=EPODOC&CC=JP&NR=2023058185A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OKAMURA MASAYUKI</creatorcontrib><title>ELECTRIC WORK MACHINE</title><description>To make it possible for a control unit common to each motor to control power supply to each motor by a PWM signal of different carrier frequency in an electric work machine having two motors.SOLUTION: An electric work machine includes: a first and a second motors; a first and a second switches provided on an energization path from a DC power source to each motor; a first and a second carrier frequency setting units; and a control unit. The first and second carrier frequency setting units set a first and a second carrier frequencies at the time of performing PWM control of power supplied to the first and second motors to a different frequency. The control unit drives the first or the second switch by a PWM signal generated at the first or the second carrier frequency to perform PWM control of the power supplied to the first or second motor.SELECTED DRAWING: Figure 2
【課題】２つのモータを備えた電動作業機において、各モータ共通の制御部が、異なるキャリア周波数のＰＷＭ信号にて各モータへの供給電力を制御できるようにする。【解決手段】電動作業機は、第１及び第２のモータと、直流電源から各モータへの通電経路上に設けられた第１及び第２のスイッチと、第１及び第２のキャリア周波数設定部と、制御部とを備える。第１及び第２のキャリア周波数設定部は、第１及び第２のモータへの供給電力をＰＷＭ制御する際の第１及び第２のキャリア周波数を、異なる周波数に設定する。制御部は、第１又は第２のキャリア周波数にて生成されたＰＷＭ信号にて、第１又は第２のスイッチを駆動し、第１又は第２のモータへの供給電力をＰＷＭ制御する。【選択図】図２</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>GENERATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2023</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBB19XF1DgnydFYI9w_yVvB1dPbw9HPlYWBNS8wpTuWF0twMSm6uIc4euqkF-fGpxQWJyal5qSXxXgFGBkbGBqYWhhamjsZEKQIAyHcfNw</recordid><startdate>20230425</startdate><enddate>20230425</enddate><creator>OKAMURA MASAYUKI</creator><scope>EVB</scope></search><sort><creationdate>20230425</creationdate><title>ELECTRIC WORK MACHINE</title><author>OKAMURA MASAYUKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2023058185A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2023</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>GENERATION</topic><toplevel>online_resources</toplevel><creatorcontrib>OKAMURA MASAYUKI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>OKAMURA MASAYUKI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ELECTRIC WORK MACHINE</title><date>2023-04-25</date><risdate>2023</risdate><abstract>To make it possible for a control unit common to each motor to control power supply to each motor by a PWM signal of different carrier frequency in an electric work machine having two motors.SOLUTION: An electric work machine includes: a first and a second motors; a first and a second switches provided on an energization path from a DC power source to each motor; a first and a second carrier frequency setting units; and a control unit. The first and second carrier frequency setting units set a first and a second carrier frequencies at the time of performing PWM control of power supplied to the first and second motors to a different frequency. The control unit drives the first or the second switch by a PWM signal generated at the first or the second carrier frequency to perform PWM control of the power supplied to the first or second motor.SELECTED DRAWING: Figure 2
【課題】２つのモータを備えた電動作業機において、各モータ共通の制御部が、異なるキャリア周波数のＰＷＭ信号にて各モータへの供給電力を制御できるようにする。【解決手段】電動作業機は、第１及び第２のモータと、直流電源から各モータへの通電経路上に設けられた第１及び第２のスイッチと、第１及び第２のキャリア周波数設定部と、制御部とを備える。第１及び第２のキャリア周波数設定部は、第１及び第２のモータへの供給電力をＰＷＭ制御する際の第１及び第２のキャリア周波数を、異なる周波数に設定する。制御部は、第１又は第２のキャリア周波数にて生成されたＰＷＭ信号にて、第１又は第２のスイッチを駆動し、第１又は第２のモータへの供給電力をＰＷＭ制御する。【選択図】図２</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 GENERATION |
| title | ELECTRIC WORK MACHINE |
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