Title:
ELECTRIC TOOL AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2024/046498
Kind Code:
A1
Abstract:
Disclosed in the present invention are an electric tool and a control method. The electric tool comprises a driving unit and a control unit, wherein the control unit is connected to a mode selection apparatus, a parameter measurement unit and a rotation speed measurement unit, the mode selection apparatus being at least provided with a fastener withdrawing gear. The control unit pre-stores a predetermined parameter and a preset rotation speed for the operation of an electric motor; under the fastener withdrawing gear, the parameter measurement unit measures a parameter for the operation of the electric motor, and compares the parameter for the operation of the electric motor with the predetermined parameter; and if the parameter for the operation of the electric motor is continuously less than the predetermined parameter within a first predetermined time, the control unit outputs a slow braking signal having a duty ratio of less than 100% to the driving unit, so as to control the electric motor to slowly brake and continue for a second predetermined time, and the control unit receives a rotation speed of the electric motor that is measured by the rotation speed measurement unit and controls the electric motor to maintain the preset rotation speed. In the patent of the present invention, when the electric motor is at the fastener withdrawing gear, the rotation speed of the electric motor is maintained at the preset rotation speed by means of slow braking, such that a user can control, according to actual situations, the electric motor to shut down.
Inventors:
LU CHUNLEI (CN)
CUI YADONG (CN)
CUI YADONG (CN)
Application Number:
PCT/CN2023/122759
Publication Date:
March 07, 2024
Filing Date:
September 28, 2023
Export Citation:
Assignee:
JIANGSU DONGCHENG TOOLS TECH CO LTD (CN)
International Classes:
H02P3/18; B25B19/00; B25B21/00; H02K11/20; H02K11/21; H02K11/27; H02K11/33; H02P23/24
Domestic Patent References:
| WO2017036401A1 | 2017-03-09 |
Foreign References:
| CN115395825A | 2022-11-25 | |||
| CN109842331A | 2019-06-04 | |||
| CN213342061U | 2021-06-01 | |||
| CN204651901U | 2015-09-16 | |||
| CN110401385A | 2019-11-01 |
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