Power tool, method, apparatus, computer program product and computer readable medium

The invention relates to a power tool (1), in particular a hand-propelled power tool, for example a polishing device (1A), a grinding device and/or a sawing device (1B), comprising a tool (2), an electric motor (3) for driving the tool (2), and a control unit (4) for actuating the electric motor (3), wherein the power tool (1) is designed to be connected to a network voltage (V1) and comprises a rectifier device (12) having an intermediate circuit (15) for providing an intermediate circuit voltage (V2) on the basis of the network voltage (V1), the intermediate circuit voltage (V2) having a plurality of successive voltage half-waves (16), and wherein the control unit (4) is designed to provide a torque change process (28) for actuating the electric motor (3), wherein the torque change process (28) comprises a respective torque half-wave (36) for each voltage half-wave (16), and wherein the control unit (4) is designed to determine a reverse voltage (34) induced in the electric motor (3) and to reduce a current