Electric work machine

An electric work machine comprising:

• a motor having a rotor;
• a drive circuit configured to drive the motor using electric power supplied from a power supply;
• a manual switch configured (i) to be manually operated by a user to selectively set a rotational direction of the rotor to either a first rotational direction or a second rotational direction and (ii) to output a first setting signal and a second setting signal that both indicate the set rotational direction;
• and
• a motor controller configured (i) to receive the first setting signal and the second setting signal from the manual switch, (ii) to control the drive circuit such that the rotor rotates in the rotational direction indicated by the first setting signal and/or the second setting signal, and (iii) to stop or prevent rotation of the rotor in response to a determination that the rotational direction indicated by the first setting signal and the rotational direction indicated by the second setting signal are inconsistent;
• wherein the motor controller comprises:
• a control circuit configured to receive the first setting signal output from the manual switch and to control the drive circuit such that the rotor rotates in the rotational direction indicated by the first setting signal;
• a determination circuit configured to receive the second setting signal output from the manual switch and to determine whether the rotational direction indicated by the second setting signal and an actual rotating direction of the rotor are consistent;
• and
• a stop circuit configured to stop or prevent the rotation of the rotor in response to a determination by the determination circuit that there is an inconsistency between the rotational direction indicated by the second setting signal and the actual rotating direction of the rotor.

A power tool comprising:

• a motor having a rotor and a stator;
• a drive circuit configured to supply electric currents to drive the rotor relative to the stator;
• a forward/reverse change lever configured to be manipulated by a user to manually select a direction of rotation of the rotor relative to the stator;
• a selection switch operably coupled to the forward/reverse change lever and configured to output a first setting signal and a second setting signal that both indicate the selected direction of rotation of the rotor;
• and
• an electric circuit and/or a controller configured to:
• determine whether or not the first setting signal and the second setting signal both indicate the same direction of rotation of the rotor;
• enable the drive circuit to supply electric currents to drive the rotor in response to a determination that the first setting signal and the second setting signal both indicate the same direction of rotation of the rotor;
• and
• stop the supply of electric currents to drive the rotor in response to a determination that the first setting signal and the second setting signal do not indicate the same direction of rotation of the rotor.