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Title:
ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2020/255584
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to improve the convenience in use of an electric tool. The electric tool (100) comprises: a motor (1); a current measurement unit (110); a torque current calculation unit (120); an upper limit value setting unit (220); and a drive control unit (150). The current measurement unit (110) measures a current flowing in the motor (1). The torque current calculation unit (120) calculates a torque current value on the basis of the current measured by the current measurement unit (110). The upper limit value setting unit (220) sets an upper limit value (ω10 *) of the speed of the motor (1) according to the torque current value calculated by the torque current calculation unit (120). The drive control unit (150) controls a rotational operation of the motor (1) on the basis of the upper limit value (ω10 *) set by the upper limit value setting unit (220).

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Inventors:
NAKAHARA MASAYUKI
KUSAGAWA TAKASHI
UEDA TAKAHIRO
Application Number:
PCT/JP2020/018831
Publication Date:
December 24, 2020
Filing Date:
May 11, 2020
Export Citation:
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Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B25B23/14; B25B21/00; B25F5/00
Foreign References:
JP2013252576A2013-12-19
JP2006345602A2006-12-21
JP2012085732A2012-05-10
JP2015009289A2015-01-19
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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