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AC/DC conversion device and AC/DC conversion system

A technology of AC-DC conversion and AC power, which is applied in the direction of converting AC power input into AC power output, output power conversion devices, electrical components, etc., which can solve the problems of low system efficiency, large system volume, and heavy weight, etc. Effects of size and weight, simplified topology, reduced number of times

Pending Publication Date: 2017-03-22
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

Due to the use of two-stage structure (DC-link in the middle) and power frequency isolation transformer, the system will be large in size, heavy in weight, and accompanied by low system efficiency

Method used

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  • AC/DC conversion device and AC/DC conversion system
  • AC/DC conversion device and AC/DC conversion system
  • AC/DC conversion device and AC/DC conversion system

Examples

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no. 1 example

[0030] see figure 1, an embodiment of the present invention provides an AC / DC conversion device 100 . The AC / DC conversion device 100 includes a three-phase matrix switch unit 110 , a high frequency transformer unit 120 , and a rectification and inverter unit 130 . The three-phase matrix switch unit 110, the high-frequency transformer unit 120, and the rectification and inverter unit 130 are connected in series in sequence.

[0031] see figure 2 , the three-phase matrix switch unit 110 includes a first bridge arm S1, a second bridge arm S2, a third bridge arm S3, a fourth bridge arm S4, a fifth bridge arm S5, a sixth bridge arm S6, a first inductor L1, a The second inductor L2, the third inductor L3, the first capacitor C1, the second capacitor C2 and the third capacitor C3. The first bridge arm S1 and the second bridge arm S2 are electrically connected to the high-frequency transformer unit 120 after being connected in series, the third bridge arm S3 and the fourth bridge...

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PUM

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Abstract

The embodiment of the invention provides an AC / DC conversion device and an AC / DC conversion system. The AC / DC conversion device comprises a three-phase matrix switch unit, a high-frequency transformer unit and a rectifier and inverter unit, wherein the three-phase matrix switch unit, the high-frequency transformer unit and the rectifier and inverter unit are sequentially connected in series. The series of a converter are reduced, the power conversion frequency is reduced, the efficiency of the system is improved, the topological structure is simplified, the volume and the weight of the system are reduced and conversion from DC to AC and from AC to DC is achieved.

Description

technical field [0001] The present invention relates to the field of AC-DC conversion, in particular to an AC-DC conversion device and an AC-DC conversion system. Background technique [0002] The current technical route of the bidirectional AC-DC converter mainly adopts a two-stage structure, including an isolation transformer connected to the power grid, a bidirectional AC-DC rectifier / inverter, a DC bus and a bidirectional DC-DC. Due to the use of two-stage structure (DC-link in the middle) and power frequency isolation transformer, the system will be bulky, heavy, and accompanied by low system efficiency. [0003] Therefore, it is necessary to design a new bidirectional AC-DC converter to meet the needs of users. Contents of the invention [0004] The object of the present invention is to provide an AC-DC conversion device and an AC-DC conversion system to achieve the purpose of reducing the number of converter stages, reducing the number of electric energy conversion...

Claims

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Application Information

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IPC IPC(8): H02M5/458
CPCH02M5/4585
Inventor 张政权
Owner SOUTHWEST JIAOTONG UNIV
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