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 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