Abstract: A mains-operable power tool having a mains connection, a rectifier connected downstream of the mains connection, and an electric motor with an upstream motor stage, wherein the rectifier and the motor stage are connected via an intermediate circuit having a smoothing capacitor connected in parallel with the rectifier and a switching branch connected in parallel with the rectifier, wherein the switching branch has an additional capacitor which can be discharged if necessary via a discharge circuit included in the intermediate circuit by a switching element included in the switching branch, wherein the intermediate circuit has a precharge circuit which is or can be used to set an offset voltage of the additional capacitor.

Abstract: A mains-operable power tool having a mains connection, a rectifier connected downstream of the mains connection, and an electric motor with an upstream motor stage, wherein the rectifier and the motor stage are connected via an intermediate circuit having a smoothing capacitor connected in parallel with the rectifier and a switching branch connected in parallel with the rectifier, wherein the switching branch has an additional capacitor which can be discharged if necessary via a discharge circuit included in the intermediate circuit by a switching element included in the switching branch, wherein the intermediate circuit has a precharge circuit which is or can be used to set an offset voltage of the additional capacitor.

Abstract: An apparatus for a vacuum cleaner for compensating air pressure surges, where a first air flow is flowable in a first flow direction through the apparatus and a second air flow is flowable in a second flow direction through the apparatus, includes a main body having a first cross-sectional area of flow and a flow resistance element. A free end of the flow resistance element projects from the main body and produces a second cross-sectional area of flow. The first cross-sectional area of flow is larger than the second cross-sectional area of flow such that the second air flow flowable in the second flow direction is reduced.

Abstract: An apparatus for a vacuum cleaner for compensating air pressure surges, where a first air flow is flowable in a first flow direction through the apparatus and a second air flow is flowable in a second flow direction through the apparatus, includes a main body having a first cross-sectional area of flow and a flow resistance element. A free end of the flow resistance element projects from the main body and produces a second cross-sectional area of flow. The first cross-sectional area of flow is larger than the second cross-sectional area of flow such that the second air flow flowable in the second flow direction is reduced.