Battery pack-operated hand-guided power tool with throttle lever
First Claim
1. A hand-held power tool comprising:
- a device housing;
at least one grip disposed on said device housing;
an electric drive motor arranged in said device housing;
an output connected to said electric motor for operating a working tool;
a battery pack providing direct current as electric energy for operating said electric drive motor an electronic control unit that is connected through a power circuit to said electric drive motor and is further connected to said battery pack;
an operating element disposed on said at least one grip for controlling said electric drive motor;
an electric actuator acted upon by said operating element, wherein said electric actuator generates an output signal that is dependent on a position of said electric actuator, the position of said electric actuator dependent on a position of said operating element, wherein the output signal is supplied through a control line to said electronic control unit;
wherein said electronic control unit supplies to said electric drive motor the direct current of said battery pack as a pulse width-modulated signal sequence based on the position of said electric actuator;
wherein a period duration of the pulse-width modulated signal sequence is composed of a voltage signal with a signal duration and of a signal pause with a pause duration, wherein, with the period duration remaining the same, the signal duration is varied by said electronic control unit as a function of the position of said electric actuator so that the electric energy that is applied to said electric drive motor by said electronic control unit is applied as a function of the position of said operating element, wherein in a first dead travel range of said operating element that adjoins an inoperative position of said operating element the supplied electric energy is zero;
wherein upon passing from said first dead travel range to an adjoining second travel range, the pulse width of the signal sequence jumps from zero to a predetermined start value.
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Accused Products
Abstract
A hand-held power tool has a device housing and at least one grip disposed on the device housing. An electric drive motor is arranged in the device housing for operating a working tool. A battery pack provides electric energy for operating the electric drive motor. An electronic control unit is connected to the electric drive motor and the battery pack. An operating element disposed on the grip controls the electric drive motor. An electric actuator is acted upon by the operating element and the output signal of the electric actuator is supplied to the electronic control unit. Electric energy is applied to the electric drive motor by the electronic control unit as a function of a position of the operating element, wherein in a first dead travel range of the operating element that adjoins an inoperative position of the operating element the supplied electric energy is zero.
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Citations
11 Claims
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1. A hand-held power tool comprising:
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a device housing; at least one grip disposed on said device housing; an electric drive motor arranged in said device housing; an output connected to said electric motor for operating a working tool; a battery pack providing direct current as electric energy for operating said electric drive motor an electronic control unit that is connected through a power circuit to said electric drive motor and is further connected to said battery pack; an operating element disposed on said at least one grip for controlling said electric drive motor; an electric actuator acted upon by said operating element, wherein said electric actuator generates an output signal that is dependent on a position of said electric actuator, the position of said electric actuator dependent on a position of said operating element, wherein the output signal is supplied through a control line to said electronic control unit; wherein said electronic control unit supplies to said electric drive motor the direct current of said battery pack as a pulse width-modulated signal sequence based on the position of said electric actuator; wherein a period duration of the pulse-width modulated signal sequence is composed of a voltage signal with a signal duration and of a signal pause with a pause duration, wherein, with the period duration remaining the same, the signal duration is varied by said electronic control unit as a function of the position of said electric actuator so that the electric energy that is applied to said electric drive motor by said electronic control unit is applied as a function of the position of said operating element, wherein in a first dead travel range of said operating element that adjoins an inoperative position of said operating element the supplied electric energy is zero; wherein upon passing from said first dead travel range to an adjoining second travel range, the pulse width of the signal sequence jumps from zero to a predetermined start value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification