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Patent Searching and Data


Title:
ELECTRIC POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2019/100740
Kind Code:
A1
Abstract:
An electric power tool, comprising a power supply module (110) for accessing an alternating current; a brushless electric motor (12) comprising a rotor and a stator winding; a rectification module (120) configured to receive the alternating current from the power supply module and to output a direct-current bus voltage; a position detection module (160) for detecting a position signal of the brushless electric motor; an MCU chip (140) configured to receive the position signal, detected by the position detection module, of the brushless electric motor and to output a drive signal according to the position signal, wherein the MCU chip comprises a controller (141); and a drive circuit (150) configured to receive the drive signal of the MCU chip so as to drive the brushless electric motor, wherein the drive circuit is connected in series between the MCU chip and the stator winding of the brushless electric motor. The electric power tool with a protection function can effectively prevent damage which may be caused by a component in the electric power tool under severe working conditions.

Inventors:
WANG, Hongwei (No.99, Tianyuan West Road Jiangning Economic and Technical Development Zon, Nanjing Jiangsu 6, 211106, CN)
CHEN, Weipeng (No.99, Tianyuan West Road Jiangning Economic and Technical Development Zon, Nanjing Jiangsu 6, 211106, CN)
Application Number:
CN2018/097242
Publication Date:
May 31, 2019
Filing Date:
July 26, 2018
Export Citation:
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Assignee:
NANJING CHERVON INDUSTRY CO., LTD. (No. 529, Jiangjun Road Jiangning Economic and Technical Development Zon, Nanjing Jiangsu 6, 211106, CN)
International Classes:
H02K29/08
Foreign References:
CN106208836A2016-12-07
CN201509176U2010-06-16
CN106702620A2017-05-24
CN206640524U2017-11-14
CN204947947U2016-01-06
US7417389B22008-08-26
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (F6 Xijin Centre, 39 Lianhuachi East Rd. Haidian District, Beijing 6, 100036, CN)
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