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High-voltage matrix converter

A matrix converter and matrix conversion technology, applied in the field of frequency converters, can solve the problems of high cost, complex control, and bulky volume, and achieve the effects of low cost, small volume, and easy energy feedback

Inactive Publication Date: 2013-06-26
WOLONG ELECTRIC GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The matrix converter proposed by the Chinese patent "cascaded multiple indirect matrix converter" with publication number CN1988353A includes a total input filter, a phase-shifting transformer, a matrix conversion unit array and a total controller, and its matrix conversion unit includes an input filter And the switch array, the total input filter is a high-voltage filter, which is bulky and costly, and the switch of the matrix conversion unit also adopts a bidirectional switch or a reverse resistance switch, and the control is very complicated

Method used

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Embodiment 1

[0017] Such as figure 1 As shown, the high-voltage matrix converter includes a phase-shifting isolation transformer 1 , a matrix conversion unit array 2 and a general controller 3 . Phase-shifting isolation transformer 1 has 15 three-phase secondary windings, each group of 3 secondary windings has the same phase, the phases of the secondary winding groups increase in turn, the initial phase is 0°, and the phase difference between adjacent ones is 12 degrees; the three-phase high-voltage AC power outputs 15 sets of isolated low-voltage three-phase AC power through the phase-shifting isolation transformer 1 to supply power for the transformation unit array 2, and the converter array 2 consists of 15 matrix transformation units arranged in an array of 3 columns × 5 rows Structural composition, the secondary winding groups of the phase-shifting isolation transformer 1 correspond to the rows in the converter array 2 respectively, and the three secondary windings in each group are r...

Embodiment 2

[0020] The difference from Embodiment 1 lies in the part of the power switch array 6 of the matrix conversion unit 4, such as image 3 As shown, the power switch array 6 includes six bidirectional switches S11, S12, S13, S14, S15, and S16. The input of each phase is connected to the output through two bidirectional switches, and the six bidirectional switches S11, S12, S13, and S14 are controlled to , S15, S16 realize three-phase AC output. .

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Abstract

The invention relates to a frequency converter, in particular to a high-voltage matrix converter. At present, frequency converters are high in cost, large in size, short in service life, high in output voltage harmonics and low in power factor. The high-voltage matrix converter comprises a phase shift isolation transformer, a matrix transformation unit array and a general controller, wherein the phase shift isolation transformer is provided with 3n three-phase secondary windings, and the matrix transformation array is of array structure formed by arranging 3n matrix transformation units in a mode that 3 rows time n lines. In the matrix transformation unit array, power output ends of the matrix transformation units of each row are serially connected, each matrix transformation unit is composed of an input filter, a power switch array and sub-controllers. Power wires of the sub-controllers are connected with any two or three phases in input ends of preceding-stage three-phase bridge rectifying circuits in the power switch arrays, and signal wires of the sub-controllers are connected with the power switch arrays. The high-voltage matrix converter is low in cost, small in size, long in service life and easy to realize energy feedback, and the frequency converters are safe and stable in operation and low in cost.

Description

technical field [0001] The invention relates to a frequency converter. Background technique [0002] With the development of power electronics technology and control technology, AC frequency conversion speed regulation is also more and more widely used. AC frequency conversion speed regulation system can be divided into transaction-direct-AC frequency conversion system and AC-AC frequency conversion system according to the principle. The AC-DC-AC frequency conversion system can be divided into three-level, five-level and multi-level according to the level. These three topologies have intermediate DC energy storage links, so the cost is high, the volume is large, and the life is short. The traditional AC-AC frequency conversion system usually works in the phase control mode, the output voltage has serious harmonics and low power factor, and the output frequency should not be higher than half of the input voltage frequency. [0003] Matrix converter is a new type of AC-AC fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/44
Inventor 冯芬王建乔张卡飞何原明李长龙
Owner WOLONG ELECTRIC GRP CO LTD
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