Title:
ELECTRIC POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2021/033432
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an electric power tool in which it is possible to raise, if necessary, the upper limit for the working torque of an electric motor. This electric power tool (1) is provided with: an electric motor (15) having a permanent magnet (131) and a coil (141); and a control unit (4) for controlling the operation of the electric motor (15). The control unit (4) has an intensified magnetic flux control mode in which an intensified magnetic flux current is passed through the coil (141) for causing the coil (141) to generate an intensified magnetic flux for intensifying the magnetic flux of the permanent magnet (131).
Inventors:
KUSAGAWA TAKASHI
NAKAHARA MASAYUKI
UEDA TAKAHIRO
NAKAHARA MASAYUKI
UEDA TAKAHIRO
Application Number:
PCT/JP2020/025697
Publication Date:
February 25, 2021
Filing Date:
June 30, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B25F5/00; H02P6/08; H02P21/06
Domestic Patent References:
| WO2018230140A1 | 2018-12-20 |
Foreign References:
| JPH10328952A | 1998-12-15 | |||
| JPH0638475A | 1994-02-10 | |||
| JP2010110211A | 2010-05-13 | |||
| JP2003259680A | 2003-09-12 | |||
| JP2015133802A | 2015-07-23 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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