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multilevel converter

A converter and current-carrying technology, applied in the direction of converting AC power input to DC power output, converting equipment structural parts, semiconductor/solid-state device parts, etc., can solve problems such as damage to insulation strength, large extra weight, etc.

Active Publication Date: 2019-03-08
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this creates significant additional weight and in some cases compromises dielectric strength

Method used

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Embodiment Construction

[0036] exist figure 1 An embodiment of a three-phase multilevel converter 5 is shown in . It comprises an AC voltage terminal W5 for inputting or outputting an AC current, and two DC voltage terminals G5a and G5b for inputting or outputting a DC current or a time-varying DC current. The direction of energy flow and the time profile of the output voltage at AC voltage terminal W5 or DC voltage terminals G5a and G5b depend on the control of the submodules SM, which are connected in series as series circuits R1, R2 and R3. This control can be managed by a central control unit, which is not included in the figure 1 shown in .

[0037] in accordance with figure 1 In the embodiment of the present invention, any one of the three series circuits R1, R2 and R3 is equipped with eight series-connected sub-modules SM and two inductors L respectively. Between the two inductances L there is respectively an intermediate terminal Z whose potential is at figure 1 The four sub-modules in t...

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Abstract

The invention relates to a multilevel converter (5) having at least two submodules (SM) connected in series, wherein each submodule (SM) has at least two switches (10, 20, 30, 40, 210, 220, 410, 420) and a capacitor (C) and two current-carrying external module terminals (A1, A2). According to the invention, at least one submodule (SM) has at least one external cooling body (60, 80, 300, 400), which is used as a current-carrying external module connection (A1, A2).

Description

technical field [0001] The invention relates to a multilevel converter having at least two submodules connected in series, each submodule having at least two switches and capacitors and two current-carrying external module terminals. Background technique [0002] Such multilevel converters are described for example in the publication "An Innovative Modular Multilevel Converter Topology Suitable for Wide Power Range" (A. Lesnicar and R. Marquardt, 2003 IEEE Bologna Power Tech Conference, 23.-26., June 2003, Bologna, Italy). The known multilevel converter is a so-called Marquardt converter arrangement comprising at least two series circuits connected in parallel. Each parallel-connected series circuit comprises at least two series-connected sub-modules respectively comprising at least two switches and capacitors. By appropriately controlling the switches, the voltage level at the output of the multilevel converter can be adjusted in a targeted manner. [0003] In modular mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/00
CPCH02M7/003H02M7/4835H01L23/34H02M7/483H05K7/20H05K7/20409H05K7/20436
Inventor M.布申多尔夫I.尤勒M.皮谢尔A.曾克纳
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG