Circuit arrangement for an electric drive
First Claim
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1. A circuit arrangement for supplying an electric drive coupleable to at least two electric energy sources, the circuit arrangement comprising:
- at least two inverter bridges operatively configured such that at least one of said at least two electric energy sources supply the electric drive at least intermittently by way of the at least one inverter bridge, wherein each of the at least two electric energy sources is associated with a corresponding one of the at least two inverter bridges;
a filter operatively connected in parallel with a corresponding one of the at least two electric energy sources; and
a switch operatively configured for disconnecting at least one electric energy source from the electric drive, wherein at least one of the electric energy sources that is disconnectable from the electric drive via the switch is connected in series with and has a direct voltage lower than that of another of the electric energy sources.
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Abstract
A circuit arrangement is provided for supplying an electric drive, to which at least two electric energy sources can be connected. At least one of the at least two electric energy sources supplies at least intermittently the electric drive by way of at least one actuating element. At least one electric energy source can be disconnected from the electric drive by way of a switch. Furthermore, a method for operating the circuit arrangement, as well as a motor vehicle including the circuit arrangement, are provided.
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Citations
20 Claims
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1. A circuit arrangement for supplying an electric drive coupleable to at least two electric energy sources, the circuit arrangement comprising:
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at least two inverter bridges operatively configured such that at least one of said at least two electric energy sources supply the electric drive at least intermittently by way of the at least one inverter bridge, wherein each of the at least two electric energy sources is associated with a corresponding one of the at least two inverter bridges; a filter operatively connected in parallel with a corresponding one of the at least two electric energy sources; and a switch operatively configured for disconnecting at least one electric energy source from the electric drive, wherein at least one of the electric energy sources that is disconnectable from the electric drive via the switch is connected in series with and has a direct voltage lower than that of another of the electric energy sources. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for operating a circuit arrangement for supplying an electric drive to which at least two electric energy sources are coupleable, the method comprising the acts of:
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supplying at least intermittently the electric drive with electric energy from at least one of the two electric energy sources via at least two inverter bridges, wherein each of the at least two electric energy sources is associated with a corresponding one of the at least inverter bridges; reducing an electrical load on one of the at least two electrical energy sources using a filter operatively connected in parallel with the one of at least two electric energy sources; and disconnecting at least one electric energy source from the electric drive via a switch, wherein at least one of the electric energy sources that is disconnectable from the electric drive via the switch is connected in series with and has a direct voltage lower than that of another of the electric energy sources.
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20. A motor vehicle, comprising:
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an electric drive; at least two electric energy sources; a circuit arrangement for supplying the electric drive, the electric drive being coupleable to the at least two electric energy sources; at least two inverter bridges operatively configured such that at least one of said at least two electric energy sources supply the electric drive at least intermittently by way of the at least one inverter bridge, wherein each of the at least two electric energy sources is associated with a corresponding one of the at least two inverter bridges; a filter operatively connected in parallel with a corresponding one of the at least two electric energy sources; and a switch operatively configured for disconnecting at least one electric energy source from the electric drive, wherein at least one of the electric energy sources that is disconnectable from the electric drive via the switch is connected in series with and has a direct voltage lower than that of another of the electric energy sources.
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Specification