| 摘要 |
An electric power tool includes: a motor (20); an operation unit (30); a control parameter setting unit (50); and a control unit (50). The control parameter setting unit (50) sets, as a control parameter of the motor (20), an optimum maximum rotational speed of the motor (20) corresponding to a predetermined set torque or a control amount corresponding to the optimum maximum rotational speed. The control unit (50) is configured to drive the motor (20) in response to an operation amount of the operation unit (30) and to control a rotational speed of the motor (20) at or smaller than the optimum maximum rotational speed based upon the control parameter. The control parameter setting unit (50) determines, as the optimum maximum rotational speed, a rotational speed of the motor (20) that rotates with a rotational energy required to rotate the output shaft at the set torque and sets the optimum maximum rotational speed as the control parameter. |
