US 12,011,813 B2
Electric work machine
Hitoshi Suzuki, Anjo (JP); Seitaro Hayashi, Anjo (JP); Motohiro Omura, Anjo (JP); and Itsuku Kato, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Sep. 8, 2020, as Appl. No. 17/014,012.
Claims priority of application No. 2019-163761 (JP), filed on Sep. 9, 2019.
Prior Publication US 2021/0069886 A1, Mar. 11, 2021
Int. Cl. H02H 7/097 (2006.01); B25F 5/00 (2006.01); H02P 6/12 (2006.01); H02P 6/16 (2016.01); H02P 6/22 (2006.01); H02P 6/24 (2006.01); H02P 29/028 (2016.01)
CPC B25F 5/001 (2013.01) [H02H 7/097 (2013.01); H02P 29/028 (2013.01); H02P 6/12 (2013.01); H02P 6/16 (2013.01); H02P 6/22 (2013.01); H02P 6/24 (2013.01)] 23 Claims
OG exemplary drawing
 
1. 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 do not indicate the same direction of rotation of the rotor.