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1. (WO2018100942) ELECTRIC TOOL
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Pub. No.: WO/2018/100942 International Application No.: PCT/JP2017/038898
Publication Date: 07.06.2018 International Filing Date: 27.10.2017
IPC:
B25F 5/00 (2006.01) ,B24B 23/02 (2006.01) ,H02P 3/22 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
25
HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
F
COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
5
Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
B PERFORMING OPERATIONS; TRANSPORTING
24
GRINDING; POLISHING
B
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
23
Portable grinding machines, e.g. hand-guided; Accessories therefor
02
with rotating grinding tools; Accessories therefor
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
P
CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS
3
Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
06
for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
18
for stopping or slowing an ac motor
22
by short-circuit or resistive braking
Applicants:
工機ホールディングス株式会社  KOKI HOLDINGS CO., LTD. [JP/JP]; 東京都港区港南二丁目15番1号 15-1, Konan 2-chome, Minato-ku, Tokyo 1086020, JP
Inventors:
吉成 拓家 YOSHINARI Takuya; JP
岩田 和隆 IWATA Kazutaka; JP
Priority Data:
2016-23294830.11.2016JP
Title (EN) ELECTRIC TOOL
(FR) OUTIL ÉLECTRIQUE
(JA) 電動工具
Abstract:
(EN) The purpose of the present invention is to provide an electric tool capable of achieving inhibition of reaction due to braking in good balance with inhibition of voltage jumping due to regenerated energy. A grinder (1) is provided with a motor (6), an inverter circuit (43) for supplying electric current to the motor (6), and a control unit (50) for controlling the inverter circuit (43). When generating an electric braking force on a motor (6), the rotation speed of which exceeds a specified rotation speed, the control unit (50) performs a first braking control of continuously turning on lower arm-side switching elements (Q4–Q6) of the inverter circuit (43), after which the control unit performs a second braking control of repeatedly turning on and off the lower arm-side switching elements (Q4–Q6).
(FR) L'objectif de la présente invention est de produire un outil électrique pouvant obtenir une inhibition de réaction due au freinage dans un bon équilibre avec une inhibition de saut de tension dû à l'énergie régénérée. Un broyeur (1) est pourvu d'un moteur (6), d'un circuit onduleur (43) pour fournir un courant électrique au moteur (6), et d'une unité de commande (50) pour commander le circuit onduleur (43). Lors de la production d'une force de freinage électrique sur un moteur (6), dont la vitesse de rotation dépasse une vitesse de rotation spécifiée, l'unité de commande (50) effectue une première commande de freinage d'activation continue d'éléments de commutation côté bras inférieur (Q4–Q6) du circuit onduleur (43), après quoi l'unité de commande effectue une seconde commande de freinage d'activation et désactivation répétées des éléments de commutation côté bras inférieur (Q4-Q6).
(JA) ブレーキによる反動の抑制、及び回生エネルギーによる電圧の跳ね上がりの抑制を、バランス良く実現可能な電動工具を提供するため、グラインダ(1)は、モータ(6)と、モータ(6)に電流を供給するインバータ回路(43)と、インバータ回路(43)を制御する制御部(50)と、を備える。制御部(50)は、回転数が所定回転数を超えるモータ(6)に電気制動力を発生させる際、インバータ回路(43)の下アーム側スイッチング素子(Q4~Q6)をオンし続ける第1ブレーキ制御の後に、下アーム側スイッチング素子(Q4~Q6)のオンオフを繰り返す第2ブレーキ制御を行う。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)