Power tool with variable output

• Main Authors: XIE HUANFA, YONG MIN LI, WEN CHAO, FANG ZHONGKANG, MA HAIBO
• Format: Patent
• Language: Chinese; English
• Published: 30.12.2022
• Subjects: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR; HAND TOOLS; MANIPULATORS; PERFORMING OPERATIONS; PORTABLE POWER-DRIVEN TOOLS; TRANSPORTING

A power tool (100) includes an output member (108) capable of generating an output, a motor (104) capable of driving the output member, and a control system (112) capable of controlling operation of the motor. The control system comprises a power supply (124) and a power switching device (126) interconnecting the power supply and the motor, the power switching device being capable of applying a pulse width modulated drive signal from the power supply to the motor; and a controller (118) capable of controlling the power switching means and monitoring at least one operating characteristic of the power tool, and adjusting the frequency of the pulse width modulated drive signal in response to a predetermined change in the operating characteristic, thereby causing the output component to adjust the output. 动力工具(100)包括能够产生输出的输出构件(108)，能够驱动输出构件的马达(104)，以及能够控制马达的运行的控制系统(112)。该控制系统包括电源(124)和将电源与马达相互连接的电源开关装置(126)，该电源开关装置能够将来自电源的脉宽调制驱动信号施加至马达；以及控制器(118)，该控制器能够控制电源开关装置并监控动力工具的至少一个运行特性，并响应于运行特性的预定变化来调节脉宽调制驱动信号的频率，从而使输出部件