Patent ID: 8692525
Filing Date: 2014-04-08
Classification: H02P

Abstract:
1. An electric power tool, in particular a handheld electric power tool, for operating with alternating current, having an electric motor, an electronic control device and an electric power switch for actuating the electric motor, characterized in that the electronic control device comprises a bias voltage output and a detection input which are connected to one another and to that side of the circuit breaker which faces the electric motor via a voltage divider which has a summation point, and the control device is further designed such that the potential across the detection input after respective triggering of the power switch is monitored, and, on the basis of this, a check is made as to whether the power switch is on, and that it is triggered again if the power switch was not on or had returned to the off state during monitoring, and that this check and possibly renewed triggering of the power switch is repeated with a half-wave of the AC voltage.