Electric tool, method, assembly, computer program product, and computer readable medium
AssigneeFestool GmbH
InventorsMichael THÜRINGER, Alexander FÜRST, Patrick SCHNELLE, Tobias HOFMANN, Michal CALTA
Life of this patent
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AssigneeFestool GmbH
InventorsMichael THÜRINGER, Alexander FÜRST, Patrick SCHNELLE, Tobias HOFMANN, Michal CALTA
Estimating the term…
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.
1-30. (canceled)
A power tool with a tool, an electric motor for driving the tool and a control unit for controlling the electric motor, wherein the power tool is designed for connection to a mains voltage and comprises 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.
A method for operating a power tool with a tool, an electric motor for driving the tool and a control unit for controlling the electric motor, the method comprising the steps:
Arrangement comprising an electric motor for driving a tool and a control unit for driving the electric motor, the control unit being configured to provide for each voltage half-wave of an intermediate circuit voltage a respective torque half-wave for driving the electric motor, the waveform of which is flattened with respect to the waveform of the voltage half-wave.
Dependencies are inferred from the claim text.