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Tri-switch single-stage voltage boosting/reducing inverter

An inverter and three-switch technology, which is applied in the field of single-stage buck-boost inverters, can solve the problem of high switching loss and switching stress of switching tubes, complex circuit structure of single-stage inverters, and poor voltage amplitude adjustment. Flexibility and other issues to achieve the effect of compact structure, easy control and implementation, high-quality output current or voltage

Active Publication Date: 2006-07-26
TIANJIN WEIHAN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of the existing single-stage inverters that either the circuit structure is complex and the voltage amplitude adjustment is inflexible, or the inverter is difficult to control and the output voltage is small, or the switching loss and switching stress of the switching tubes used are large, the present invention Provides a three-switch single-stage buck-boost inverter, which is a single-stage Buck-Boost inverter for distributed generation systems

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  • Tri-switch single-stage voltage boosting/reducing inverter
  • Tri-switch single-stage voltage boosting/reducing inverter

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specific Embodiment approach 1

[0008] Specific implementation mode one: see figure 1 , the inverter in this specific embodiment consists of a high-pass filter 2, a control circuit 5, a main self-shutoff switch S1, a first auxiliary self-shutoff switch S2, a second auxiliary self-shutoff switch S3, a high-frequency inverter Composed of excitation transformer 3, resonant capacitor Cr and power diode D1, the positive output terminal of DC power supply 1 is connected to the collector of the main self-shutdown switch S1, and the emitter of the main self-shutoff switch S1 is connected to the high-frequency flyback transformer 3 The same-named end of the primary coil L1 and the negative end of the power diode D1, the positive end of the power diode D1 are connected to the non-identical end of the secondary coil L2 of the high-frequency flyback transformer 3 and one end of the resonant capacitor Cr, and the high-frequency flyback transformer 3 The terminal with the same name of the secondary coil L2 is connected to...

specific Embodiment approach 2

[0009] Specific implementation mode two: see figure 1 The difference between this embodiment and Embodiment 1 is that the high-pass filter 2 includes a filter inductor Lf, one end of the resonant capacitor Cr is connected to one end of the filter inductor Lf, and the other end of the filter inductor Lf is connected to the load or the grid 4 One input end of the resonant capacitor Cr is connected to the other input end of the load or grid 4 . Other composition and connection relationship with

[0010] The specific embodiment one is the same.

specific Embodiment approach 3

[0011] Specific implementation mode three: see figure 1 The difference between this specific embodiment and the second specific embodiment is that: the high-pass filter 2 also includes a filter capacitor Cf, and the filter capacitor Cf is connected in parallel between the two input terminals of the load or the grid 4 . Other compositions and connections are the same as those in the second embodiment. Embodiment 3 Compared with Embodiment 2, the filter capacitor Cf is omitted, which will reduce the burden of the filter inductor Lf.

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Abstract

This invention relates to distribution generation system single buck to boost inverter, which adopts High frequency reverse interfere through main self-switch, first assistant switch tube and second assistant switch tube PWM to control its single inverter and uses basic Bick to Boost DC to DC circuit and combines two Buck t oBuck DC to DC circuits together to realize buck and boost to get new type of single inverter.

Description

technical field [0001] The invention belongs to the technical field of electric engineering, and in particular relates to a single-stage buck-boost inverter which can be used in a distributed power generation system. Background technique [0002] With the increasing demand for energy in modern society, the available primary energy such as coal and oil is getting less and less, and the combustion of coal in the process of power generation, the waste gas and waste generated by oil have seriously polluted the natural environment, which is harmful to human health and production. Life has done a lot of harm. In order to avoid energy crisis and protect the environment, people began to use renewable energy. This has led to the rapid development of distributed power generation systems using renewable energy, which can be used as small and medium power generation systems for emergency backup of electric energy, supplementary power grid systems, and power generation in local or remot...

Claims

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Application Information

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IPC IPC(8): H02M3/28H02M3/335H02M7/537
Inventor 谭光慧纪延超
Owner TIANJIN WEIHAN ELECTRIC CO LTD
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