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US 2004/0170034 A1Published application
Converter circuit with short-circuit current protections
AssigneeABB Schweiz AG
InventorsGerold Knapp, Pascal Mauron, Christoph Stemmler
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AssigneeABB Schweiz AG
InventorsGerold Knapp, Pascal Mauron, Christoph Stemmler
Estimating the term…
A converter circuit with short-circuit current protection having a DC voltage circuit (1) is proposed, which DC voltage circuit (1) is formed by a DC voltage circuit subsystem (2.1), the DC voltage circuit subsystem (2.1) having a first energy store (3) and a second energy store (4), which is connected in series with the first energy store (3), and a fuse (5). Furthermore, the converter circuit has at least one pair of branches (6) provided for each phase (R, S, T) and connected in parallel with the DC voltage circuit (1), each pair of branches (6) having power semiconductor switches. In order to achieve a low-inductance converter circuit, the fuse (5) forms the connection between the first energy store (3) and the second energy store (4).
A converter circuit with short-circuit current protection having a DC voltage circuit (1), which DC voltage circuit (1) is formed by a DC voltage circuit subsystem (2.1), the DC voltage circuit subsystem (2.1) having a first energy store (3) and a second energy store (4), which is connected in series with the first energy store (3), and a fuse (5), and having at least one pair of branches (6) provided for each phase (R, S, T) and connected in parallel with the DC voltage circuit (1), each pair of branches (6) having power semiconductor switches, characterized in that the fuse (5) forms the connection between the first energy store (3) and the second energy store (4).
The converter circuit as claimed in one of the preceding claims, characterized in that in each case two phases (R, S, T) are connected to one another via a first drivable short-circuit element (8).
The converter circuit as claimed in one of the preceding claims, characterized in that at least one second drivable short-circuit element (7) is connected in parallel with the DC voltage circuit subsystem (2.1).
The converter circuit as claimed in one of the preceding claims, characterized in that the DC voltage circuit (1) has at least one further DC voltage circuit subsystem (2.2, . . . , 2.n) of the DC voltage circuit subsystem (2.1), the DC voltage circuit subsystems (2.1, . . . , 2.n) being connected in parallel with one another.
Dependencies are inferred from the claim text.