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Common-mode voltage spike problem suppression method for indirect matrix converter

A matrix converter, common-mode voltage technology, applied in the direction of converting AC power input to AC power output, electrical components, output power conversion devices, etc. To achieve the effect of realizing common mode voltage, solving the problem of common mode voltage spikes, and avoiding common mode voltage spikes

Active Publication Date: 2021-11-02
HEBEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

The traditional modulation method is to reduce the common-mode voltage at the cost of sacrificing the voltage transmission ratio or the quality of the input and output waveforms, and increasing the number of switching transitions, resulting in problems such as narrow speed range of the converter-driven motor system and large energy loss.

Method used

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  • Common-mode voltage spike problem suppression method for indirect matrix converter
  • Common-mode voltage spike problem suppression method for indirect matrix converter
  • Common-mode voltage spike problem suppression method for indirect matrix converter

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] like figure 1As shown, from the topological point of view, the indirect matrix converter (Indirect matrix converter, IMC) is divided into two stages: a rectification stage and an inverter stage. The structure of the rectification stage is the same as that of the current source rectifier, and the structure of the inverter stage is the same as that of the voltage source two-level inverter. In order to prevent IMC input short-circuit and output open-circuit, the switching states of IMC rectification stage and inverter stage need to meet:

[0042]

[0043]

[0044] Among them, S px ,S nx (x=a,b,c) is the rectifier switch tube, S Py ,S Ny (y=A, B, C) is the switching tube of the inverter stage. For the convenience of analysis, it is d...

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Abstract

According to a common-mode voltage spike problem suppression method for an indirect matrix converter, the common-mode voltage peak value of an effective vector is suppressed by 71% under a low voltage transmission ratio, and the common-mode voltage peak value of a zero vector is suppressed by 50%. When the zero current vector of the rectifier stage acts, the inverter stage carries out vector switching to realize zero-voltage switching-on and switching-off of a switching tube of the inverter stage, and the problem of common-mode voltage spike caused by a dead zone effect is solved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a method for suppressing the common-mode voltage spike problem of an indirect matrix converter. Background technique [0002] Matrix converter (Matrix Converter, MC) is a direct AC-AC AC converter developed on the basis of cycloconverter. With the advantages of limited power factor, high integration and high energy density, it has become a new generation of power conversion device with great potential. Matrix converters can be divided into direct matrix converters (Direct Matrix Converter, DMC) and indirect matrix converters (Indirect matrix converter, IMC) from the topological structure. Compared with DMC, IMC has the advantages of appropriately reducing the number of switch tubes and realizing multiple inverter stages, so IMC has great potential for development. [0003] During the operation of the matrix converter, a high-frequency, high-amplitude common-mode volta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458H02M1/32H02M1/38H02M1/08
CPCH02M5/4585H02M1/32H02M1/38H02M1/083Y02B70/10
Inventor 李珊瑚杨天豪操孙鹏姜国凯丁一夫刘义平
Owner HEBEI UNIV OF TECH
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