| 摘要 |
PROBLEM TO BE SOLVED: To provide a power tool capable of suppressing a sudden rise of rotational speed when a load rapidly falls.SOLUTION: Provided is a power tool such as an electric agitator. If detecting that a load falls to be equal to or lower than a predetermined value during execution of rotational speed control in response to the viscosity of an agitation target material (that is, an agitation vane is unloaded from within the agitation target material), a control unit 41 lowers a duty cycle of a PWM signal for driving an inverter circuit 47 as compared with that just before the fall of the load so as to keep or reduce the rotational speed of a brushless motor 11. |
