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Boost-type AC-AC direct converter topology

A converter and topology technology, which is applied in the topology field of Boost type AC-to-DC converters, can solve the problems of low voltage and current level of converter topology, and achieve the effect of solving the problem of low voltage level.

Active Publication Date: 2017-08-22
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a Boost type AC-AC direct converter topology, which solves the technical problem of lower voltage and current levels of the converter topology in the prior art

Method used

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  • Boost-type AC-AC direct converter topology
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  • Boost-type AC-AC direct converter topology

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Embodiment 1

[0017] Embodiment 1, reference figure 1 and Figure 6 , a Boost type AC-AC direct converter topology. In order to describe the topology more vividly, an AC power supply 1 and a load R1 are cascaded to the topology. The topology includes: a boost inductor for boosting the input voltage 2. It is used to make the Boost type AC-AC direct converter topology work in one of the pre-stage boost mode, AC positive half-cycle boost output mode, AC negative half-cycle boost output mode and charging mode according to the control command bridge circuit.

[0018] The bridge circuit includes upper and lower half bridges that are symmetrical to each other. The upper half bridge includes n boost modules and 2 bidirectional switches. The n boost modules are marked as: boost modules 1, ..., n -1, n, the boost modules 1, ..., n-1, n are connected in series in the manner of port B connecting port A, the port network from top to bottom is: AB...ABAB, wherein the port A of the boost module 1 is con...

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Abstract

The invention discloses a Boost-type AC-AC direct converter topology comprising: a boost inductor for boosting an input voltage and a bridge circuit used for enabling, according to a control instruction, the Boost-type AC-AC direct converter topology to operate in one of a pre-stage boosting mode, an AC positive half cycle boosting output mode, an AC negative half cycle boosting output mode, and a charging mode. The boost inductor is connected in series with the bridge circuit. The topology boosts the input voltage by using boost modules so as to well achieve AC voltage input and high-class AC voltage output, and solves a technical problem that a converter topology is low in voltage class.

Description

technical field [0001] The invention relates to the technical field of electric energy conversion, in particular to a Boost type AC-AC direct converter topology. Background technique [0002] With the large-capacity, new energy, and special environment power conversion technologies, especially the popular power electronic transformers, sinusoidal AC voltage regulators, AC choppers, and flexible AC transmission system (FACTS) controllers, etc. The flexibility and stability requirements of the converter are becoming increasingly stringent, and the traditional two-level converter topology can no longer meet the high-level voltage and current requirements of the device. [0003] Designing converter topologies that meet high-level voltage requirements is our research direction. Contents of the invention [0004] In order to solve the above problems, the present invention provides a Boost type AC-AC direct converter topology, which solves the technical problem of low voltage an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/293
CPCH02M5/293H02M1/0077
Inventor 李湘峰屈莉莉张彩霞姜桂秀
Owner FOSHAN UNIVERSITY