Abstract: The invention relates to a transport device (100), more particularly a pram (102), having at least three wheels (116, 118, 120) for moving on a surface (180, 182) and having a handle (110) for a user, wherein at least one wheel of the at least three wheels is designed as a drive wheel (122, 124, 126), which can be driven under electromotive power by means of an associated electrical drive unit (140, 142, 144), in order to permit an at least partial electromotive support to the manual pushing or pulling operation of the transport device by the user on the surface, wherein the transport device is provided with at least one acceleration sensor (172, 174) and a predefined braking torque (?Fmot) can be applied periodically to the transport device in pushing or pulling operation by means of the electrical drive unit and wherein a control device (170) assigned to the at least one acceleration sensor is designed to analyse the acceleration values (ax) from the at least one acceleration sensor to detect a presence or

Abstract: The invention relates to a device (100) for charging an electrical energy store (B) from a three-phase AC voltage source (U1, U2, U3), said device having: —a converter device (20) electrically connected to the AC voltage source (U1, U2, U3) and with three half-bridges (H1, H2, H3), each having two series-connected switches (S1, S2; S3, S4; S5, S6), wherein an inductor (L1, L2, L3) is connected electrically between a respective node point of two switches (S1 . . .

Abstract: The invention relates to a device (100) for charging an electric energy store (B) from a three-phase AC voltage source (W1, W2, W3), having, in each phase of the AC voltage source (W1, W2, W3):—a step-down converter (TS1 . . . TS3) with a switch (STS1 . . . STS3);—a diode (FLD) connected in parallel to the step-down converter (TS1 . . . TS3); and—a converter (U) which is connected to the step-down converter (TS1 . . . TS3) and which comprises at least one first half bridge (H1) with two serially connected switches (S1, S2), an inductor (L4) being connected between a connection point of the two switches (S1, S2) of the first half bridge (H1) and the step-down converter (TS1 . . . TS3);—wherein a current direction across the inductor (L4) is set by means of a rectifier (D11 . . . D33) in the step-down converter (TS1 . . . TS3); and—the switches (STS1 . . . STS3) of the step-down converter (TS1 . . .

Abstract: Apparatus for charging an electrical energy store from an AC voltage source. The apparatus includes a rectifier device with a capacitor interconnected in parallel with the rectifier device A current controller device is interconnected with the rectifier device. A converter device is interconnected with the current controller device. The converter device includes at least one first half-bridge having two switches connected in series, An inductor is interconnected with a connection point of the switches of the first half-bridge Depending on the voltage of the AC voltage source and a current through the inductor a switch of the current controller device and one of the switches of the first half-bridge of the converter device are switchable by means of a controller in such a manner that a current for charging the electrical energy store drawn from the AC voltage source and a voltage of the AC voltage source are substantially in phase.

Abstract: The invention relates to a device (100) for charging an electrical energy store (B) from a three-phase AC voltage source (U1, U2, U3), said device having: —a converter device (20) electrically connected to the AC voltage source (U1, U2, U3) and with three half-bridges (H1, H2, H3), each having two series-connected switches (S1, S2; S3, S4; S5, S6), wherein an inductor (L1, L2, L3) is connected electrically between a respective node point of two switches (S1 . . .

Abstract: The invention relates to a device (100) for charging an electric energy store (B) from a three-phase AC voltage source (W1, W2, W3), having, in each phase of the AC voltage source (W1, W2, W3):—a step-down converter (TS1 . . . TS3) with a switch (STS1 . . . STS3);—a diode (FLD) connected in parallel to the step-down converter (TS1 . . . TS3); and—a converter (U) which is connected to the step-down converter (TS1 . . . TS3) and which comprises at least one first half bridge (H1) with two serially connected switches (S1, S2), an inductor (L4) being connected between a connection point of the two switches (S1, S2) of the first half bridge (H1) and the step-down converter (TS1 . . . TS3);—wherein a current direction across the inductor (L4) is set by means of a rectifier (D11 . . . D33) in the step-down converter (TS1 . . . TS3); and—the switches (STS1 . . . STS3) of the step-down converter (TS1 . . .

Abstract: The invention relates to a control device (100) for charging an electrical energy store (T5), comprising: a network filter device (T1), which is designed to limit electrical interferences of an input AC voltage (U1); a power rectifier circuit device (T2), which is coupled to the network filter device (T1) and is designed to convert the input AC voltage (U1) into a rectified input voltage (U2); a full bridge device (T3) which is coupled to the power rectifier circuit device (T2) and is designed to convert the rectified input voltage (U2) into a high-frequency AC voltage (U3); a transformer device (TRF 1), which is coupled to the full bridge device (T3) and is designed to convert the high-frequency AC voltage (U3) into a transformed AC voltage (U4); a rectifier circuit device (T4) which is coupled to the transformer device (TRF1) and is designed to convert the transformed AC voltage (U4) into a rectified output voltage (U5); and an output choke (DL1) which is coupled to the rectifier circuit device (T4) and is

Abstract: Apparatus for charging an electrical energy store from an AC voltage source. The apparatus includes a rectifier device with a capacitor interconnected in parallel with the rectifier device A current controller device is interconnected with the rectifier device. A converter device is interconnected with the current controller device. The converter device includes at least one first half-bridge having two switches connected in series, An inductor is interconnected with a connection point of the switches of the first half-bridge Depending on the voltage of the AC voltage source and a current through the inductor a switch of the current controller device and one of the switches of the first half-bridge of the converter device are switchable by means of a controller in such a manner that a current for charging the electrical energy store drawn from the AC voltage source and a voltage of the AC voltage source are substantially in phase.