Abstract: Provided is an electric work machine in which it is possible to limit the risk of contact between a control unit and wiring provided inside a motor housing. In the electric work machine (1A), a motor (6) and a control unit (13) are housed inside a motor housing (2). A gear case (4) is connected in front of the motor housing (2) and a handle housing (3) is connected behind the motor housing (2). The motor housing (2) is an integrally molded cylinder. Electrical connection between the wiring of the motor (6) and the wiring of the control unit (13) is accomplished by connectors (23), which are inside the handle housing (3) that is outside of and behind the motor housing (2). The control unit (13) has a switching element for conducting electricity to the motor (6).

Abstract: A rectifier circuit for rectifying an AC voltage supplied from a commercial power supply into a DC voltage, a smoothing capacitor for smoothing the output of the rectifier circuit, and an electrically powered tool for supplying the smoothed pulsating DC voltage to a motor by an inverter circuit, wherein when the motor is driven while no load is being applied to a tip tool, the smoothed DC voltage repeatedly generates a maximal value and a minimum value so as to synchronize with the fluctuation in the AC voltage. During no-load rotation, control is performed so that driving is performed at a value that is less than a threshold value D1 for the duty ratio at which the generation of a gear sound starts in any of the speed dial setting values 1-6. It is thereby possible to suppress a gear sound generated by a power transmission mechanism during no-load rotation.

Abstract: A rectifier circuit for rectifying an AC voltage supplied from a commercial power supply into a DC voltage, a smoothing capacitor for smoothing the output of the rectifier circuit, and an electrically powered tool for supplying the smoothed pulsating DC voltage to a motor by an inverter circuit, wherein when the motor is driven while no load is being applied to a tip tool, the smoothed DC voltage repeatedly generates a maximal value and a minimum value so as to synchronize with the fluctuation in the AC voltage. During no-load rotation, control is performed so that driving is performed at a value that is less than a threshold value D1 for the duty ratio at which the generation of a gear sound starts in any of the speed dial setting values 1-6. It is thereby possible to suppress a gear sound generated by a power transmission mechanism during no-load rotation.