Active clamping three-level zero-voltage soft-switching converter using coupled inductor

A coupled inductance, three-level technology, applied in the direction of high-efficiency power electronic conversion, conversion of AC power input to DC power output, electrical components, etc., can solve the problems of complex auxiliary circuits and complex control, and achieve simple structure and control, high performance Excellent, easy modular design effect

Inactive Publication Date: 2012-07-18
XI AN JIAOTONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the disadvantage of this technology is that the auxiliary circuit is too complicated. Each auxiliary circuit contains 4 auxiliar

Method used

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  • Active clamping three-level zero-voltage soft-switching converter using coupled inductor
  • Active clamping three-level zero-voltage soft-switching converter using coupled inductor
  • Active clamping three-level zero-voltage soft-switching converter using coupled inductor

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Embodiment Construction

[0041] Such as Figure 4 As shown, the active-clamp three-level zero-voltage soft-switching converter using coupled inductors includes two capacitors 1 in series on the DC side and a main circuit 2 connected to the two capacitors 1 in series. An auxiliary circuit is connected to the circuit 2, wherein: the main circuit 2 includes switching tubes T1, T2, T3, T4 connected in series in sequence and diodes D1, D2, D3, D4 connected in antiparallel with the switching tubes respectively; switching tubes T1, T2 There are two series switching tubes Tp and Tn connected in parallel between T3 and T4, and diodes Dp and Dn are respectively connected in antiparallel to the two switching tubes; the collector of the switching tube Tp is connected to the connection point C of the switching tubes T1 and T2 , the emission set of the switching tube Tn is connected to the connection point D of the switching tubes T3 and T4.

[0042] The auxiliary circuit includes two resonant capacitors 6 connect...

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Abstract

The invention discloses an active clamping three-level zero-voltage soft-switching converter using coupled inductor, comprising two capacitors connected in series at direct current side and a main circuit connected with the two capacitors. An auxiliary switching circuit is connected on the main circuit. The switching converter is characterized in that the main circuit comprises switching tubes T1, T2, T3 and T4 connected in series in order and diodes D1, D2, D3 and D4 connected with the switching tubes in anti-parallel, respectively; two switching tubes Tp and Tn connected in series are connected between switching tubes T1 and T2, T3 and T4 in parallel, and connected with diodes Dp and Dn in anti-parallel; and the auxiliary switching circuit comprises two resonant capacitors connected with the switching tubes T2 and T3 in parallel respectively, coupled inductors connected to output ends of the switching tubes T1 and T2 and an auxiliary switching circuit connected with output ends of main circuit diodes Dp and Dn in parallel. The switching converter has the advantages of being simple in structure and control, convenient in modular design, high in reliability, easier in application and so on.

Description

technical field [0001] The invention relates to an electric energy conversion device, specifically an active midpoint voltage clamping three-level zero-voltage soft-switching converter using a coupled inductor. Background technique [0002] In recent years, with the implementation of the sustainable development strategy and the advancement of energy saving and emission reduction projects, three-phase and single Phase power electronic converters have been paid more and more attention and widely used. In the typical application occasions of power electronic converters, such as uninterruptible power supply, variable frequency drive of motors, and new energy generation such as wind energy and solar energy, many requirements are put forward for the performance of power electronic converters, such as high operating efficiency and high power. density, low output harmonics, low electromagnetic interference, etc. At present, most power electronic converters adopt "hard switching" P...

Claims

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Application Information

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IPC IPC(8): H02M7/487H02M7/5387
CPCY02B70/1491Y02B70/10
Inventor 李锦刘进军
Owner XI AN JIAOTONG UNIV
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