Title:
POWER TOOL HAVING VARIABLE OUTPUT
Document Type and Number:
WIPO Patent Application WO/2022/178774
Kind Code:
A1
Abstract:
A power tool (100) includes an output member (108) adapted to generate an output, a motor (104) adapted to drive the output member, and a control system (112) adapted to control an operation of the motor. The control system includes a power source (124) and a power switching device (126) interconnecting the power source to the motor adapted to apply a PWM drive signal from the power source to the motor, and a controller (118) adapted to control the power switching device and monitoring at least one operating characteristic of the power tool and adjusting the frequency of the PWM drive signal in response to a predetermined change in the operating characteristic to thereby cause the output member to regulate the output.
More Like This:
Inventors:
XIE HUANFA (CN)
FANG ZHONGKANG (CN)
MA HAI BO (CN)
WEN CHAO (CN)
LI YONGMIN (CN)
FANG ZHONGKANG (CN)
MA HAI BO (CN)
WEN CHAO (CN)
LI YONGMIN (CN)
Application Number:
PCT/CN2021/077945
Publication Date:
September 01, 2022
Filing Date:
February 25, 2021
Export Citation:
Assignee:
TECHTRONIC CORDLESS GP (US)
XIE HUANFA (CN)
XIE HUANFA (CN)
International Classes:
B25F5/00
Domestic Patent References:
| WO2016100879A1 | 2016-06-23 | |||
| WO2014175470A1 | 2014-10-30 |
Foreign References:
| CN105093973A | 2015-11-25 | |||
| CN110572089A | 2019-12-13 | |||
| US20040217727A1 | 2004-11-04 | |||
| CN109873578A | 2019-06-11 | |||
| JP2014069253A | 2014-04-21 |
Attorney, Agent or Firm:
KING & WOOD MALLESONS (CN)
Download PDF: