公开(公告)号：US20230115229A1

公开(公告)日：2023-04-13

申请号：US17960530

申请日：2022-10-05

Applicant: MAKITA CORPORATION

Inventor： Masayuki OKAMURA ,  Kazuya OKUMA

IPC: A01D34/78

Abstract: An electric work machine includes a first and second motors; a first and second switches disposed on corresponding current conduction path from a direct-current power source to each motor; a first and second carrier frequency setting devices; and a controller. The first and second carrier frequency setting devices respectively set a first and second carrier frequencies of a time when PWM controlling an electric power supply to the first and second motors. The first and second carrier frequencies are different from each other. The controller drives the first switch or the second switch by using a PWM signal generated at the first or second carrier frequency and PWM controls an electric power supply to the first or second motor.