Circuit system for a charging station, charging station and use of a charging station
A circuit system for a charging station which is configured to charge an energy store in a vehicle, the circuit system including a transformer with transformer outputs which are DC-isolated from one another, a first subsystem and a second subsystem each being connected to one of the transformer outputs. The first subsystem and the second subsystem each include a rectifier which has a DC-DC converter connected upstream of it, the DC-DC converter being coupled to a changeover logic unit on its input side or on its output side. In particular, provision is made for the first subsystem to be connected to a delta circuit in the transformer output and for the second subsystem to be connected to a star circuit in the transformer output.
1. A circuit system for a charging station which is configured to charge an energy store in a vehicle, the circuit system comprising a transformer with transformer output circuit groups, the transformer output circuits of each transformer output circuit group DC-isolated from one another, each transformer output circuit of the transformer output circuit group being a delta circuit or a star circuit, a first subsystem connected to a first of the transformer output circuits in a transformer output circuit group and a second subsystem connected to a second of the transformer output circuits of the transformer output circuit group, the first subsystem comprising a first rectifier and the second subsystem comprising a second rectifier DC-isolated from the first rectifier, each rectifier having a DC-DC converter connected upstream of that rectifier, the DC-DC converters coupled to a changeover logic unit on an input side of the changeover logic unit or on an output side of the changeover logic unit.
2. The circuit system as claimed in claim 1 , the changeover logic unit connecting outputs of the DC-DC converters of the first subsystem and of the second subsystem in parallel or in series.
3. The circuit system as claimed in claim 1 , the transformer outputs having a star circuit and a delta circuit, the first subsystem being connected to a transformer output having a star circuit, and the second subsystem being connected to a transformer output having a delta circuit.
4. The circuit system claimed in claim 1 , DC-DC converters respectively being connected downstream of the rectifier of the first subsystem and the rectifier of the second subsystem, the DC-DC converters being connected in series or in parallel with one another on output sides of the DC-DC converters.
5. The circuit system as claimed in claim 1 , the same DC-DC converter being connected downstream of the rectifier of the first subsystem and the rectifier of the second subsystem, the rectifiers being connected in series or in parallel via a changeover logic unit on their output side.
6. The circuit system claimed in claim 1 , the DC-DC converter being a step-down converter.
7. The circuit system as claimed in claim 1 , the transformer being a medium voltage transformer.
8. A charging station comprising system as claim 1 .
9. The use of a charging station as claimed in claim 8 for charging an energy store of a vehicle.