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US 12,224,697 B2Granted
Start-up mode for a power tool
AssigneeFestool GmbH
InventorsTobias Hofmann, Norbert Morgenstern
Life of this patent
Estimating the term…
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AssigneeFestool GmbH
InventorsTobias Hofmann, Norbert Morgenstern
Estimating the term…
A power tool, in particular a handheld power tool, for example a grinding machine, that includes a tool, an electric motor for driving the tool, and a control unit for actuating the electric motor using a motor current (MI). The control unit has a start-up mode in which the control unit actuates the electric motor in such a way that the electric motor during the start-up mode traverses a rotational speed ramp (DR), at which the rotational speed of the electric motor is increased continuously up to operating rotational speed (ADZ) The control unit is designed to adjust the gradient of the rotational speed ramp (DR) on the basis of an acquired temperature for the start-up mode and/or to adjust the intensity of the motor current (MI) on the basis of the acquired temperature for the start-up mode.
A power tool comprising:
A method for providing a start-up mode for a power tool comprising a tool and an electric motor for driving the tool, wherein the electric motor undergoes a rotational speed ramp during the start-up mode in which during the rotational speed ramp, the rotational speed of the electric motor is continuously increased up to a working rotational speed, the method comprising the steps:
Dependencies are inferred from the claim text.