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US 2005/0237678 A1Published application
Configuration and method for protecting converter means
AssigneeABB AB
InventorReijo Virtanen
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AssigneeABB AB
InventorReijo Virtanen
Estimating the term…
A protection configuration for converter means which comprise a plurality of controllable switches, the protection configuration comprising a protection circuit coupled to the alternating voltage side of the converter means, which protection circuit comprises at least one protective switch configured to short-circuit the alternating voltage side of the converter means, wherein the protection configuration, in predetermined failure situations, is configured to close the protective switch and thus to short-circuit the alternating voltage side of the converter means. After the failure situation has cleared up, the protection configuration is configured to short-circuit the alternating voltage side of the converter means by means of the controllable switches to enhance commutation of the protective switch.
A protection configuration for converter means, which converter means are provided with a direct voltage side coupled to a direct voltage intermediate circuit, and an alternating voltage side, and which converter means comprise means for inverting the direct voltage of the direct voltage intermediate circuit and for feeding it to the alternating voltage side, the inverting means comprising a plurality of controllable switches, the protection configuration comprising a protection circuit coupled to the alternating voltage side of the converter means, which protection circuit comprises at least one protective switch configured to short-circuit the alternating voltage side of the converter means, wherein the protection configuration, in predetermined failure situations, is configured to close the protective switch and thus to short-circuit the alternating voltage side of the converter means, wherein after the failure situation is over, the protection configuration is configured to short-circuit the alternating voltage side of the converter means by means of the controllable switches to enhance commutation of the protective switch.
A method of using a protection configuration for converter means, which converter means are provided with a direct voltage side coupled to a direct voltage intermediate circuit, and an alternating voltage side, and which converter means comprise means for inverting the direct voltage of the direct voltage intermediate circuit and for feeding it to the alternating voltage side, the inverting means comprising a plurality of controllable switches, the protection configuration comprising a protection circuit coupled to the alternating voltage side of the converter means, which protection circuit comprises at least one protective switch configured to short-circuit the alternating voltage side of the converter means, the method comprising the step of closing, in predetermined failure situations, the protective switch and thus short-circuiting the alternating voltage side of the converter means, wherein the method further comprises the step of short-circuiting, after the failure situation is over, the alternating voltage side of the converter means by means of the controllable switches to enhance commutation of the protective switch.
Dependencies are inferred from the claim text.