公开(公告)号：EP2807000A1

公开(公告)日：2014-12-03

申请号：EP13741300.1

申请日：2013-01-22

申请人： Ingersoll-Rand Company

发明人： WOOD, Michael, R. ,  BALL, JR., William, M. ,  TAYLOR, Christopher, John

IPC分类号： B25F5/00 ,  B25B23/151 ,  B25B23/16

CPC分类号： H02P6/08 ,  B25F5/00

摘要： Cordless power tools include a pistol housing having an upper portion that merges into a downwardly extending handle, a DC motor residing in the upper portion of the housing, the DC motor having a rotor that drives an output shaft; a torque transducer on board the tool in communication with the output shaft; and a dynamic motor control circuit residing in the housing in communication with the motor and torque transducer. The dynamic motor control circuit includes a Kelvin resistor in communication with the motor for measuring motor current and digital hall switches in communication with the motor for measuring motor speed. The motor current can vary by at least 100 A during operation.

公开(公告)号：EP2807000B1

公开(公告)日：2020-04-01

申请号：EP13741300.1

申请日：2013-01-22

申请人： Ingersoll-Rand Company

发明人： WOOD, Michael, R. ,  BALL, JR., William, M. ,  TAYLOR, Christopher, John

IPC分类号： B25F5/00 ,  B25B23/151 ,  B25B23/16 ,  B25B23/147 ,  H02P6/08