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Title:
POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2019/026503
Kind Code:
A1
Abstract:
Provided is a power tool with which it is possible to perform braking in which deterioration and damage of an element are suppressed. In a brake control, a computation unit 21: performs switching control of a combination of any of upper-arm-side switching elements Q1-Q3 and any of lower-arm-side switching elements Q4-Q6 while sequentially switching the elements; and causes a current to flow in a closed loop (a closed loop in the same direction as during driving of the power tool) in order through any of the upper-arm-side switching elements Q1-Q3, a stator coil 6e, any of the lower-arm-side switching elements Q4-Q6, and a first diode bridge 15.

Inventors:
YOSHINARI TAKUYA (JP)
TANIMOTO HIDEYUKI (JP)
Application Number:
PCT/JP2018/024854
Publication Date:
February 07, 2019
Filing Date:
June 29, 2018
Export Citation:
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Assignee:
KOKI HOLDINGS CO LTD (JP)
International Classes:
B25F5/00; B24B23/02; H02P6/24
Domestic Patent References:
WO2016098563A12016-06-23
Foreign References:
JPH03190582A1991-08-20
JP2016158464A2016-09-01
JP2008252966A2008-10-16
JPH11311436A1999-11-09
JP2010269426A2010-12-02
JP5381390B22014-01-08
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