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AssigneeMarquardt GmbH
InventorsTino Erb, Dirk Pfeiffer, Klaus Fiederer
Estimating the term…
A control device, in particular an electrical switch for use for an electrical tool such as a rechargeable-battery and/or plug-powered electrical tool having an electric motor. The switch has a housing for holding at least one heat-generating component such as a power transistor, a MOSFET, a triac or the like, which is arranged in particular in an electrical circuit arrangement which, for example, is used for open-loop and/or closed-loop control of the electric motor by appropriate open-loop and/or closed-loop control of the electrical load current flowing through the component to the electric motor. A means for thermal conduction is connected on the one hand to the housing of the electrical switch, and/or to the heat-generating component, in particular to the power semiconductor which is located in the housing, and on the other hand to a cooled area which is associated with the switch.
A control device for an electric motor comprising a housing for holding at least one heat-generating component that is arranged in an electrical circuit arrangement that is used for control of the electric motor by controlling the electrical load current flowing through said heat-generating component to the electric motor, and means for thermal conduction connected on one end thereof to the housing and on another end thereof to a cooled area associated with said control device.
An electrical switch for an electrical tool having an electric motor, comprising a housing for holding at least one heat-generating component arranged in an electrical circuit arrangement that is used for control of the electric motor by controlling the electrical load current flowing through said heat-generating component to the electric motor, and means for thermal conduction connected on one end thereof to the housing and on another end thereof to a cooled area associated with said electrical switch.
An electrical tool, comprising an outer shell, an electric motor, a fan impeller for providing cooling air for the electric motor and an electrical switch for controlling said electric motor, said electrical switch comprising (i) a housing for holding at least one heat-generating component arranged in an electrical circuit arrangement that is used for control of the electric motor by controlling the electrical load current flowing through said heat-generating component to the electric motor, and (ii) means for thermal conduction connected on one end thereof to the housing and on another end thereof to a cooled area within said outer shell proximate said fan impeller.
Dependencies are inferred from the claim text.