公开(公告)号：US20230370011A1

公开(公告)日：2023-11-16

申请号：US18318349

申请日：2023-05-16

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Shi-Uk Chung ,  Matthew R. Bailey

IPC: H02P29/00

CPC classification number: H02P29/00

Abstract: A power tool including a battery pack interface configured to receive a removable and rechargeable battery pack, a motor including a rotor and a stator, the rotor operable to rotate relative to the stator, and a switching module that includes a plurality of switching devices connected between the battery pack interface and the motor. The power tool further includes a controller including a processor and a memory. The controller is configured to receive a signal from an external device, control the switching module to provide a high frequency current signal from battery pack to the motor in response to receiving the signal, the motor configured to emit an audible sound in response to the high frequency current signal, and control the switching module to stop providing the high frequency current signal to the motor.