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A single-core four-winding high-gain single-stage buck-boost inverter

An inverter and single-stage technology, which is applied in the field of single-core four-winding high-gain single-stage Buck-Boost inverters, can solve the problems of large number of components and limited voltage gain, and achieve volume and weight savings, Effect of high voltage gain and reduced number of switches

Active Publication Date: 2020-05-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a single-core four-winding high-gain single-stage Buck-Boost inverter, which solves the voltage problems existing in most current Buck-Boost single-stage inverter topologies The problem of limited gain and excessive number of components in some high-gain Buck-Boost topologies

Method used

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  • A single-core four-winding high-gain single-stage buck-boost inverter
  • A single-core four-winding high-gain single-stage buck-boost inverter
  • A single-core four-winding high-gain single-stage buck-boost inverter

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Embodiment Construction

[0017] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0018] Such as figure 1 As shown, the topology of the present invention has a simple basic structure and is easy to analyze, and the switch tubes are respectively M 1 ~ M 3 . Coupled inductor L cp Used as an energy storage device to achieve a high conversion ratio boost, the secondary to primary turns ratio is defined as n=N 3 / N 1 =N 4 / N 2 . Due to the symmetry of the positive and negative half cycles of the output, the primary winding N 1 with N 2 have the same number of turns, therefore, the secondary winding N 3 with N 4 also have the same number of turns. The output capacitor is C o , the load is the equivalent resistance R L .

[0019] Among them, the switching tube M 1 source, N 1 Winding terminal with the same name and N 3 The non-identical end of the winding is connected and grounded; the switch tube M 1 The drain is connected to the ...

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Abstract

The invention relates to a single-core four-winding high-gain single-stage Buck-Boost inverter which achieves high voltage gain with fewer semiconductor devices. There are only three switches in thistopology, compared with other topologies, the number of switches is significantly reduced; High voltage gain can be achieved by introducing four-winding coupling inductor, and the voltage gain level can be changed conveniently by changing the number of turns of coupling inductor, thus different application environments can be realized conveniently. The symmetrical structure of coupled inductor canrealize AC output in single-stage topology. At the same time, the coupled inductors share a magnetic core, which can save the volume and weight of the inverter.

Description

technical field [0001] The invention belongs to the field of power electronics and relates to a single-core four-winding high-gain single-stage Buck-Boost inverter. Background technique [0002] In new energy fields such as photovoltaics and fuel cells, due to the low output voltage of the power generation side and the relatively high voltage of the grid side, the inverter is required to have the ability of high voltage gain, usually using a high-gain DC-DC A two-stage inverter composed of a converter and a first-stage bridge inverter cascaded. However, the two-stage inverter usually has a large number of components and requires two sets of control circuits at the same time, resulting in high system circuit complexity, high cost, and low efficiency. The single-stage inverter requires less components and is easy to achieve lower cost and higher efficiency, which has attracted more and more interest from scholars and industries. [0003] In the scheme adopted by the single-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02M3/158
CPCH02M3/1582H02M7/48
Inventor 赵犇皇甫宜耿相里康任子俊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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