Patent ID: 8466641
Filing Date: 2013-06-18
Classification: B25F,H02P

Abstract:
1. A power tool comprising: an electronically commutated electric motor having a certain commutation interval, said motor comprising a plurality of exciting windings, said exciting windings being configured in a star connection or in a delta connection; a drive driven by said motor; an energy supply device for providing electrical energy; a controller, the controller comprising a motor controller for activating the motor and further comprising an operating-state recognition module which is configured for detecting at least one operating-state variable and, as a function thereof, for outputting a brake signal; wherein said controller is configured to initiate, as a function of said brake signal, a braking procedure comprising at least one brake cycle having a certain duration, said brake cycle having a first time segment, wherein the motor is short-circuited, and at least a second time segment, wherein current is fed to the motor opposite to an original direction of rotation; wherein said duration of said brake cycle corresponds to said commutation interval.