Electric tool and starting method thereof

• Main Authors: LIU YANGBO, XIE ZHIBIN, LI JIANG, DUAN JUNYA
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2019
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DRESSING OR CONDITIONING OF ABRADING SURFACES; ELECTRICITY; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GENERATION; GRINDING; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; PERFORMING OPERATIONS; POLISHING; TRANSPORTING

The invention discloses an electric tool. The tool comprises a motor, an output shaft, a starting circuit, a brake device and a controller; the starting circuit is used for enabling a rotor of the motor to do acceleration motion at the first acceleration in the starting process of the electric tool, the brake device is used for enabling the rotor of the motor to do deceleration motion at the second acceleration in the brake process of the electric tool, the controller is used for controlling the first maximum acceleration of the rotor of the motor in the starting process to be larger than thesecond maximum acceleration in the brake process, and meanwhile, the invention discloses a starting method of the electric tool with the starting circuit and the brake device. According to the electric tool and the starting method thereof, the tightening torque, on a rotating part, generated by starting of the rotor of the motor at the first maximum acceleration is larger than the loosening torsion, on the rotating part,