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Inversion unit and five-level inverter with same

An inverter unit and inverter technology are applied in electrical components, output power conversion devices, and AC power input is converted into DC power output, etc., and can solve problems such as high cost and complex inverter unit structure.

Active Publication Date: 2012-11-14
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides an inverter unit and a five-level inverter with the inverter unit to solve the problems of complex structure and high cost of the existing inverter unit

Method used

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  • Inversion unit and five-level inverter with same
  • Inversion unit and five-level inverter with same
  • Inversion unit and five-level inverter with same

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Embodiment Construction

[0099] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0100] The embodiment of the present invention discloses an inverter unit to solve the problems of complex structure and high cost of the existing inverter unit.

[0101] like figure 2 As shown, the inverter unit disclosed in this embodiment includes: a switch tube T1, a switch tube T2, a switch tube T3, a switch tube T4 and a switch tube T5; wherein:

[0102] The switch tube T1 is connected in anti-parallel with a diode D1, the switch...

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PUM

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Abstract

The invention discloses an inversion unit. A switch tube T1 is connected in parallel with a diode D1; a switch tube T2 is connected in parallel with a diode D2; a switch tube T3 is connected in parallel with a diode D3; a switch tube T4 is connected in parallel with a diode D4; a switch tube T5 is connected in parallel with a diode T5; the switch tube T2 is connected in series with a diode DF1; one end (where an emitting electrode is located) in a series connection circuit is connected with a common end of an emitting electrode of the switch tube T1 and a collector electrode of the switch tube T5; the switch tube T4 is connected in series with a diode DF2; one end (where a collector electrode is located) in the series connection circuit is connected with the common end of the emitting electrode of the switch tube T1 and the collector electrode of the switch tube T5; the switch tube T3 is connected in parallel with a first branch and a second branch; the first branch comprises a diode DA1 and a diode DB2 which are connected in series; the second branch comprises a diode DB1 and a diode DA2 which are connected in series; and a common end of the diode DB1 and the diode DA2 is connected with the common end of the emitting electrode of the switch tube T1 and the collector electrode of the switch tube T5.

Description

technical field [0001] The present application relates to the technical field of power electronics, and in particular, to an inverter unit and a five-level inverter having the inverter unit. Background technique [0002] In medium-voltage and large-capacity applications, multi-level inverters are widely used. The current five-level inverters are mainly diode-clamped. The diode-clamped five-level inverter is described below. [0003] see figure 1 , the diode-clamped five-level inverter includes: a power supply unit 101, an inverter unit 102 and a filter grid-connected unit 103, wherein: the power supply unit 101 generates five levels of 2, 1, 0, -1 and -2, The above-mentioned five levels are inverted into alternating current by the inverter unit 102, and then the standard alternating current is formed after being filtered by the grid-connected unit 103. [0004] However, the inverter unit in the prior art five-level inverter includes eight switch tubes, each of which is co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483
Inventor 汪洪亮宋炀
Owner SUNGROW POWER SUPPLY CO LTD
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