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US 5,969,959 AGranted
Converter circuit arrangement with protection circuit
AssigneeAsea Brown Boveri AG
InventorsBjorn Odegard, Jochen Rees
Life of this patent
Estimating the term…
Abstract
A converter circuit arrangement is specified having a rectifier, an intermediate circuit and an invertor connected thereto. In order to protect the circuit against failures and overvoltage, a protection circuit which comprises, in particular, varistors is connected between the two partial rectifiers of the rectifier.
Claims5
A converter circuit comprising
- a rectifier (1, 2), in particular having a 12-pulse topology, having a first partial rectifier (1) and having a second partial rectifier (1) which are connected to an AC power supply (3) and supply a DC intermediate circuit (4), the first partial rectifier (1) being connected to a positive connection (5) of the DC intermediate circuit (4), and the second partial rectifier (2) being connected to a negative connection (6) of the DC intermediate circuit (4),
- an invertor (9) which is connected to the DC intermediate circuit (4);
- wherein a protection circuit (7) is connected between the two partial rectifiers (1, 2) and a mid-potential (8) of the DC intermediate circuit (4).
Dependencies are inferred from the claim text.