Festool Gmbh

Michael Thüringer

Tobias Hofmann

Patrick Schnelle

Michal Calta

Alexander Fürst

A power tool, in particular a hand-held power tool, for example a polishing device, a grinding device, a sawing device and/or a router, with a tool, an electric motor for driving the tool and a control unit for controlling the electric motor, in which the power tool is designed for connection to an AC supply voltage and includes a rectifier arrangement with an intermediate circuit for providing an intermediate circuit voltage on the basis of the AC supply voltage. The intermediate circuit voltage has a plurality of successive voltage half-waves, and in which the control unit is configured to calculate, for each voltage half-wave, a respective torque half-wave for controlling the electric motor, the control unit being configured to sample each voltage half-wave in order to obtain a plurality of voltage half-wave values, and to convert each voltage half-wave value into a respective torque half-wave value in order to calculate the respective torque half-wave.

Power tool, arrangement, method, computer program product and computer-readable medium

A power tool, in particular a hand-held power tool, for example a polishing device, a grinding device and/or a sawing device, with a tool, an electric motor for driving the tool and a control unit for controlling the electric motor. The power tool is designed for connection to a mains voltage and includes a rectifier arrangement with an intermediate circuit for providing an intermediate circuit voltage based on the mains voltage, the Intermediate circuit voltage having a plurality of successive voltage half-waves, and the control unit being configured to provide, for each voltage half-wave, a respective torque half-wave for driving the electric motor, the waveform of which torque half-wave is flattened with respect to the waveform of the voltage half-wave.

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Großbettlingen, Germany

Michael Thüringer