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Semiconductor protective elements for controlling short-circuits at the DC end of voltage source converters

A technology of semiconductors and power semiconductors, applied in electrical components, AC power input conversion to DC power output, irreversible DC power input conversion to AC power output, etc., can solve the problem that the solution does not produce satisfactory costs, etc.

Active Publication Date: 2009-09-30
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But such solutions did not produce satisfactory results and were also costly
Furthermore, turn-off power semiconductors and free-running diodes are often provided jointly on the market, for example in a common housing, so that the overdimensions of the free-running diodes necessitate a separate and cost-intensive production of the power semiconductors

Method used

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  • Semiconductor protective elements for controlling short-circuits at the DC end of voltage source converters
  • Semiconductor protective elements for controlling short-circuits at the DC end of voltage source converters
  • Semiconductor protective elements for controlling short-circuits at the DC end of voltage source converters

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Embodiment Construction

[0025] figure 1 A schematic illustration of an exemplary embodiment of the device 1 according to the invention is shown. The shown arrangement has three phase modules 2 a , 2 b and 2 c which can each be connected to a phase of an alternating current network 7 . For this purpose, each phase module 2 a , 2 b and 2 c has an AC voltage connection 3 . Furthermore, each phase module 2 a , 2 b and 2 c has a positive direct voltage connection p and a negative direct voltage connection n connected to the positive pole of the direct voltage intermediate circuit 5 and to the negative pole of the direct voltage intermediate circuit 5 .

[0026]The phase modules 2a, 2b and 2c each comprise two phase module branches extending between the alternating voltage connection 3 and the direct voltage connections p and n, respectively. In the exemplary embodiment shown, a total of six phase module strings are provided. Each phase module branch has a series connection of submodules with power semi...

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Abstract

The present invention discloses a device (1) for converting an electric current, comprising at least one phase module (2a, 2b, 2c) that has an AC terminal (3) and at least one DC terminal (p, n). A phase module branch (11p, 11n), each of which is equipped with serially connected sub-modules (15), is formed between each DC terminal (p, n) and each AC terminal (3), each sub-module (15) being provided with at least one power semiconductor (12, 13). In order to create a device (1) which is able to withstand even high short-circuit currents for a sufficient period of time, semiconductor protectingmeans (9, 14, 20) are connected in parallel or in series to at least one of the power semiconductors (12, 13).

Description

technical field [0001] The invention relates to a device for switching electrical currents with at least one phase module having an AC voltage connection and at least one DC voltage connection, wherein a DC voltage connection is formed between each DC voltage connection and each AC voltage connection phase module strings, and wherein each phase module string has a series connection of submodules each having at least one power semiconductor. Background technique [0002] Such a device is known from DE 10103031 A1. There, a classic voltage intermediate circuit converter and a voltage intermediate circuit converter with a distributed energy store are described. Voltage intermediate circuit converters with distributed or divided energy stores and the ability to convert staged voltages are also referred to as multilevel converters. The described voltage intermediate circuit converter is provided for connection to a polyphase AC network, the converter being connected to a second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/49H02H7/122
CPCH02M7/003H02M7/5387H02M2007/4835H02M5/4585H02M1/32H02M7/4835
Inventor 迈克·多马希克乔格·多恩英戈·尤勒乔格·兰夸克-布·图克劳斯·沃尔夫林格
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG