Power tool

To provide a power tool capable of suppressing torque ripple and reducing power consumption without demagnetizing the permanent magnets in the rotor. The power tool includes a brushless motor, converting means, voltage detecting, and means conduction switching means. The brushless motor includes: a...

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Hauptverfasser:	Iwata, Kazutaka, Funabashi, Kazuhiko
Format:	Patent
Sprache:	eng
Schlagworte:	BROACHING COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR DYNAMO-ELECTRIC MACHINES ELECTRICITY FILING GENERATION HAND TOOLS LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR MACHINE TOOLS MANIPULATORS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PLANING PORTABLE POWER-DRIVEN TOOLS SAWING SCRAPING SHEARING SLOTTING TRANSPORTING
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creator	Iwata, Kazutaka Funabashi, Kazuhiko
description	To provide a power tool capable of suppressing torque ripple and reducing power consumption without demagnetizing the permanent magnets in the rotor. The power tool includes a brushless motor, converting means, voltage detecting, and means conduction switching means. The brushless motor includes: a stator including a plurality of windings; and a rotor rotatable relative to the stator. The converting means is configured to convert an AC voltage supplied from an AC power supply into a varying DC voltage. The voltage detecting means is configured to detect the varying DC voltage. The conduction switching means includes an output line for applying the varying DC voltage to the plurality of windings. The conduction switching means is configured to perform: sequentially switching at least one winding to be applied with the varying DC voltage among the plurality of windings to rotate the rotor; and changing number of conducting windings on the basis of the varying DC voltage, the number of conducting windings being number of the at least one winding to be applied with the varying DC voltage.
format	Patent
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The power tool includes a brushless motor, converting means, voltage detecting, and means conduction switching means. The brushless motor includes: a stator including a plurality of windings; and a rotor rotatable relative to the stator. The converting means is configured to convert an AC voltage supplied from an AC power supply into a varying DC voltage. The voltage detecting means is configured to detect the varying DC voltage. The conduction switching means includes an output line for applying the varying DC voltage to the plurality of windings. The conduction switching means is configured to perform: sequentially switching at least one winding to be applied with the varying DC voltage among the plurality of windings to rotate the rotor; and changing number of conducting windings on the basis of the varying DC voltage, the number of conducting windings being number of the at least one winding to be applied with the varying DC voltage.</description><language>eng</language><subject>BROACHING ; COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR ; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS ; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR ; DYNAMO-ELECTRIC MACHINES ; ELECTRICITY ; FILING ; GENERATION ; HAND TOOLS ; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR ; MACHINE TOOLS ; MANIPULATORS ; METAL-WORKING NOT OTHERWISE PROVIDED FOR ; PERFORMING OPERATIONS ; PLANING ; PORTABLE POWER-DRIVEN TOOLS ; SAWING ; SCRAPING ; SHEARING ; SLOTTING ; TRANSPORTING</subject><creationdate>2019</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=20190910&DB=EPODOC&CC=US&NR=10411620B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20190910&DB=EPODOC&CC=US&NR=10411620B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Iwata, Kazutaka</creatorcontrib><creatorcontrib>Funabashi, Kazuhiko</creatorcontrib><title>Power tool</title><description>To provide a power tool capable of suppressing torque ripple and reducing power consumption without demagnetizing the permanent magnets in the rotor. The power tool includes a brushless motor, converting means, voltage detecting, and means conduction switching means. The brushless motor includes: a stator including a plurality of windings; and a rotor rotatable relative to the stator. The converting means is configured to convert an AC voltage supplied from an AC power supply into a varying DC voltage. The voltage detecting means is configured to detect the varying DC voltage. The conduction switching means includes an output line for applying the varying DC voltage to the plurality of windings. The conduction switching means is configured to perform: sequentially switching at least one winding to be applied with the varying DC voltage among the plurality of windings to rotate the rotor; and changing number of conducting windings on the basis of the varying DC voltage, the number of conducting windings being number of the at least one winding to be applied with the varying DC voltage.</description><subject>BROACHING</subject><subject>COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR</subject><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>DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR</subject><subject>DYNAMO-ELECTRIC MACHINES</subject><subject>ELECTRICITY</subject><subject>FILING</subject><subject>GENERATION</subject><subject>HAND TOOLS</subject><subject>LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR</subject><subject>MACHINE TOOLS</subject><subject>MANIPULATORS</subject><subject>METAL-WORKING NOT OTHERWISE PROVIDED FOR</subject><subject>PERFORMING OPERATIONS</subject><subject>PLANING</subject><subject>PORTABLE POWER-DRIVEN TOOLS</subject><subject>SAWING</subject><subject>SCRAPING</subject><subject>SHEARING</subject><subject>SLOTTING</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2019</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZOAKyC9PLVIoyc_P4WFgTUvMKU7lhdLcDIpuriHOHrqpBfnxqcUFicmpeakl8aHBhgYmhoZmRgZORsbEqAEAu-Yc7g</recordid><startdate>20190910</startdate><enddate>20190910</enddate><creator>Iwata, Kazutaka</creator><creator>Funabashi, Kazuhiko</creator><scope>EVB</scope></search><sort><creationdate>20190910</creationdate><title>Power tool</title><author>Iwata, Kazutaka ; Funabashi, Kazuhiko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US10411620B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2019</creationdate><topic>BROACHING</topic><topic>COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR</topic><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>DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR</topic><topic>DYNAMO-ELECTRIC MACHINES</topic><topic>ELECTRICITY</topic><topic>FILING</topic><topic>GENERATION</topic><topic>HAND TOOLS</topic><topic>LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR</topic><topic>MACHINE TOOLS</topic><topic>MANIPULATORS</topic><topic>METAL-WORKING NOT OTHERWISE PROVIDED FOR</topic><topic>PERFORMING OPERATIONS</topic><topic>PLANING</topic><topic>PORTABLE POWER-DRIVEN TOOLS</topic><topic>SAWING</topic><topic>SCRAPING</topic><topic>SHEARING</topic><topic>SLOTTING</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>Iwata, Kazutaka</creatorcontrib><creatorcontrib>Funabashi, Kazuhiko</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Iwata, Kazutaka</au><au>Funabashi, Kazuhiko</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Power tool</title><date>2019-09-10</date><risdate>2019</risdate><abstract>To provide a power tool capable of suppressing torque ripple and reducing power consumption without demagnetizing the permanent magnets in the rotor. The power tool includes a brushless motor, converting means, voltage detecting, and means conduction switching means. The brushless motor includes: a stator including a plurality of windings; and a rotor rotatable relative to the stator. The converting means is configured to convert an AC voltage supplied from an AC power supply into a varying DC voltage. The voltage detecting means is configured to detect the varying DC voltage. The conduction switching means includes an output line for applying the varying DC voltage to the plurality of windings. The conduction switching means is configured to perform: sequentially switching at least one winding to be applied with the varying DC voltage among the plurality of windings to rotate the rotor; and changing number of conducting windings on the basis of the varying DC voltage, the number of conducting windings being number of the at least one winding to be applied with the varying DC voltage.</abstract><oa>free_for_read</oa></addata></record>
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subjects	BROACHING COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR DYNAMO-ELECTRIC MACHINES ELECTRICITY FILING GENERATION HAND TOOLS LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR MACHINE TOOLS MANIPULATORS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PLANING PORTABLE POWER-DRIVEN TOOLS SAWING SCRAPING SHEARING SLOTTING TRANSPORTING
title	Power tool
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