Electric tool and device switch for an electric tool
OwnerSteffen Katzenberger, Stefan Rapp +2inventors
InventorsSteffen Katzenberger, Stefan Rapp, Gunter Flinspach, Markus Schmid
Life of this patent
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Abstract
The invention relates to a device switch for an electric tool, in particular a battery-operated electric tool. A power circuit for supplying power of a motor and an electronic circuit for monitoring the temperature, power and current is integrated into the device switch. The invention moreover relates to a method for monitoring an electric tool, in particular an electric tool with rechargeable battery operation.
Claims21
1-19. (canceled)
A device switch for an electric tool, in particular an electric tool with rechargeable battery operation, having
- a power circuit for supplying voltage to a motor integrated with the device switch, and
- an electronic circuit, in particular a protection circuit, which monitors a temperature, a voltage, and/or a current, integrated with the device switch.
An electric tool, in particular an electric tool with rechargeable battery operation, wherein the electric tool has a device switch as defined by claim 1.
The electric tool as defined by claim 10, wherein the electric tool has a temperature sensor monitoring a temperature of a rechargeable battery.
The electric tool as defined by claim 10, wherein by means of monitoring of a maximum current flowing in the power circuit, a limitation is brought about in a torque furnished by the electric tool.
A method for monitoring an electric tool, in particular an electric tool with rechargeable battery operation, having a device switch, in which the device switch has a power circuit supplying voltage to a motor, wherein a temperature of at least one component of the electric tool, a current through the power circuit, and/or a supply voltage, in particular a rechargeable battery voltage, is monitored, and by means of an electronic circuit, in particular a protection circuit, a speed control and/or regulation is effected as a function of monitored values for the temperature, the current, and/or the voltage.
The method as defined by claim 15, wherein the electronic circuit controls and/or regulates the rpm in a predetermined range, and if this range is exceeded, the value for the rpm is set to a maximum possible value.
The method as defined by claim 16, wherein the predetermined range is between 0% and 50% of maximum possible rpm.
The method as defined by claim 15, wherein upon attainment or overshooting of a defined temperature of a monitored component, a change is made to a safer mode of operation.
The method as defined by claim 15, wherein upon attainment or undershooting of a predetermined minimum voltage, the electric tool is shut off.
Dependencies are inferred from the claim text.