US 12,445,080 B2
Non-rotating location identification in power tools
Shi-Uk Chung, Brookfield, WI (US); and Matthew R. Bailey, Racine, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on May 16, 2023, as Appl. No. 18/318,349.
Claims priority of provisional application 63/342,286, filed on May 16, 2022.
Prior Publication US 2023/0370011 A1, Nov. 16, 2023
Int. Cl. H02P 1/00 (2006.01); H02P 29/00 (2016.01)
CPC H02P 29/00 (2013.01) 20 Claims
OG exemplary drawing
 
1. A power tool comprising:
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;
a switching module that includes a plurality of switching devices connected between the battery pack interface and the motor; and
a controller including a processor and a memory, the controller configured to:
receive a signal from an external device,
control the switching module to provide a high frequency current signal from the battery pack interface 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.