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1. (WO2018198673) ELECTRIC TOOL

Pub. No.:    WO/2018/198673    International Application No.:    PCT/JP2018/013675
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Mar 31 01:59:59 CEST 2018
IPC: H02P 6/15
B23D 47/12
B25F 5/00
Applicants: KOKI HOLDINGS CO., LTD.
工機ホールディングス株式会社 
Inventors: KUMAKURA Takeru
熊倉 健
TANIMOTO Hideyuki
谷本 英之
YOSHINARI Takuya
吉成 拓家
KURAGANO Shinji
倉賀野 慎治
Title: ELECTRIC TOOL
Abstract:
Provided is an electric tool capable of continuing work by making the electrical advance angle of a brushless motor variable even when a load is heavy. The electric tool is provided with: a brushless motor 1; a controller 30 for controlling the drive of the brushless motor; and an inverter circuit 20 supplied with a pulsation voltage obtained by rectifying an AC power supply input in a full-wave manner and energizing the brushless motor 1 according to a control signal of the controller 30. The controller 30 can change the electrical advance angle of the brushless motor 1. The controller 30 detects the motor current flowing through the brushless motor 1 and increases the electrical advance angle when the motor current reaches a predetermined threshold value.