公开(公告)号：US20220255479A1

公开(公告)日：2022-08-11

申请号：US17731997

申请日：2022-04-28

申请人： Black & Decker Inc.

发明人： Girish YAJURVEDI ,  Mehdi RAMEZANI ,  Michael K. Forster ,  John C. VANKO ,  Tal GOTTESMAN ,  Levent GOKDERE

IPC分类号： H02P21/10 ,  H02P21/18 ,  H02P21/22 ,  H02P21/36 ,  B25F5/02 ,  H02P21/00 ,  H02P21/13 ,  H02P27/12 ,  H02P21/34

摘要： A power tool is provided including a housing, a brushless motor disposed within the housing, a power switch circuit that supplies power from a power source to the brushless motor, and a controller configured to apply a drive signal to the power switch circuit to control the supply of power to the brushless motor. The controller is configured to receive at least one signal associated with a phase current of the motor, detect an angular position of the rotor based on the phase current of the motor within a variable speed range of zero to at least 15,000 rotations-per-minute (RPM), and control the drive signal based on the detected angular position of the rotor to electronically commutate the motor within a power output of zero to at least 1500 watts.