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Three-phase line voltage cascading VIENNA converter

A converter and three-phase line technology, applied in the field of new circuit topology, can solve problems such as no obvious advantages, and achieve the effects of reduced voltage stress, high power density, and reduced inductance volume

Active Publication Date: 2016-08-24
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of converter has no obvious advantages in the application of fans and pump motors that do not require energy feedback in the field of energy-saving speed regulation

Method used

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  • Three-phase line voltage cascading VIENNA converter
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  • Three-phase line voltage cascading VIENNA converter

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Embodiment Construction

[0036] Embodiment and working principle of the present invention are further described below in conjunction with accompanying drawing:

[0037] Such as figure 1 As shown, the three-phase line voltage cascaded VIENNA converter of the present invention is characterized in that its secondary cascaded topology includes:

[0038] Three-phase input power u in star connection without neutral a , u b , u c ;

[0039] Nine input boost inductors L connected in series with each phase arm a1 , L b1 , L c1 , L a2 , L b2 , L c2 , L a3 , L b3 , L c3 , the inductance value is the same, and the output terminals of the three boost inductors connected to the three-phase power supply are marked as A, B, and C respectively;

[0040] Three three-phase three-wire VIENNA converters with exactly the same structure, the connection points of the three three-phase bridges corresponding to the upper and lower bridge arms of the phase are respectively marked as A1, B1, C1, A2, B2, C2 and A3, B...

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Abstract

The invention discloses a novel three-phase line voltage cascading VIENNA converter, and belongs to an AC / DC converter. The converter comprises three-phase alternating current power supplies which are in star connection, nine input inductors and three cascading VIENNA converters. According to the converter, the three-phase input line voltage cascading superposing connection way is adopted to lower the voltage stress of a switch tube and to improve the voltage level, so that the converter can be applied to high-voltage high-power level occasions; in addition, the direct current side can output same or different voltages to supply power to multiple paths of loads concurrently; the active power factor correction can be realized, and the total harmonic distortion (THD) can be lowered; compared with a three-phase fully-controlled type cascading H-bridge rectifier, 27 fully-controlled type electric power semiconductor devices can be reduced by the converters provided by the invention when each of the converter comprises three modules in the cascading connection; compared with a rectifier which adopts all the fully-controlled type electric power semiconductor device and adopts the same three-phase bridge line voltage cascading connection way, a half of the fully-controlled type electric power semiconductor device can be reduced by the converter provided by the invention; and in addition, the voltage withstand of the switch tube can be reduced by half, and the cost and the size of the converter are reduced consequently.

Description

technical field [0001] The present invention relates to a new circuit topology of an AC / DC converter and its application, in particular to a three-phase line voltage cascaded VIENNA conversion that can be applied to high-voltage and high-power occasions and can supply power to multiple loads at the same time device. Background technique [0002] In recent years, "Multilevel Converter" (Multilevel Converter) has been successfully applied in the fields of high voltage and high power frequency conversion speed regulation, active power filter, high voltage direct current (HVDC) transmission and power system reactive power compensation. The basic circuit topology of multilevel converters can be roughly divided into two categories: clamping type and unit cascading type. Ping medium and high voltage inverters, and cascaded H bridge medium and high voltage inverters produced by Robinson or Lide Huafu are typical representatives of these two types of products. Regardless of which o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219
CPCH02M7/2173H02M7/219H02M1/007H02M1/009
Inventor 程红王聪侯丽楠巩英才张衡庄园
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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