Title:
ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2018/155073
Kind Code:
A1
Abstract:
In order to provide an electric tool capable of suppressing harmonics, a portable cutting machine (1) as an electric tool is provided with: a motor (6); a diode bridge (42) that converts AC to DC; an inverter circuit (43) that supplies a driving current to the motor (6); a trigger unit (5) that makes a command to start the motor (6); electrolytic capacitors (C2, C3) provided between the output terminals of the diode bridge (42); and a switching element (Q7) connected in series to the electrolytic capacitors (C2, C3) between the output terminals of the diode bridge (42). After the command to start the motor (6) is made by the trigger unit (5), the switching element (Q7) is set to an off-state at the time of low load and the switching element (Q7) is set to an on-state at the time of high load.
Inventors:
YOSHINARI TAKUYA (JP)
FUNABASHI KAZUHIKO (JP)
FUNABASHI KAZUHIKO (JP)
Application Number:
PCT/JP2018/002442
Publication Date:
August 30, 2018
Filing Date:
January 26, 2018
Export Citation:
Assignee:
KOKI HOLDINGS CO LTD (JP)
International Classes:
B25F5/00; H02P6/00
Domestic Patent References:
| WO2016158133A1 | 2016-10-06 |
Foreign References:
| JP2010213510A | 2010-09-24 | |||
| JP2016015793A | 2016-01-28 | |||
| JP2009060705A | 2009-03-19 | |||
| JP2007151207A | 2007-06-14 | |||
| JPS5668288A | 1981-06-08 | |||
| JP2012029440A | 2012-02-09 | |||
| JP2003018877A | 2003-01-17 |
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