Power tool system and motor rotating-speed control system thereof

• Main Author: WAN DEKANG
• Format: Patent
• Language: Chinese; English
• Published: 15.08.2017
• 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; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GRINDING; HAND TOOLS; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; MANIPULATORS; PERFORMING OPERATIONS; POLISHING; PORTABLE POWER-DRIVEN TOOLS; TRANSPORTING

The invention relates to a power tool system and a motor rotating-speed control system thereof. The motor rotating-speed control system is used for controlling the rotating speed of a power tool motor, a frequency converter is connected with the motor, the motor rotating-speed control system comprises a main switch, a speed adjusting element and the frequency converter, and the main switch is connected with the frequency converter and used for controlling startup and shutdown of the motor; and the speed adjusting element is mounted on a power tool and connected with the frequency converter, the speed adjusting element outputs a speed adjusting signal by adjusting the speed adjusting element, the frequency converter receives the speed adjusting signal, the expected driving frequency and voltage are obtained according to the speed adjusting signal, a control signal is generated according to the comparison result of the expected driving frequency and driving voltage and the current driving frequency and voltage