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Monopole non-isolation three-phase Cuk inverter

An inverter, non-isolated technology, applied in the field of single-pole non-isolated three-phase Cuk inverter, can solve the problems of limited buck-boost capability, limited application, multiple passive energy storage elements, etc., to achieve easy control, volume Small, simple circuit parameter design effect

Inactive Publication Date: 2018-04-06
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these new unipolar three-phase inverters require more passive energy storage components and have limited buck-boost capability, which limits the application of this type of inverter in buck-boost applications.

Method used

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  • Monopole non-isolation three-phase Cuk inverter
  • Monopole non-isolation three-phase Cuk inverter
  • Monopole non-isolation three-phase Cuk inverter

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing:

[0026] A kind of unipolar non-isolated three-phase Cuk inverter of the present invention, as figure 1 As shown, it is composed of DC power supply, six switching tubes, three diodes, four inductors and four capacitors; the first inductor L 1 Lower end and DC power supply U in "+" terminal connection; the first inductance L 1 The upper end is respectively connected with the first switch tube S 1 Collector, the third switch tube S 3 Collector, fifth switch tube S 5 collector and the first capacitor C 1 Upper connection; DC power supply U in The "-" terminal is respectively connected to the first diode D 1 Cathode, second diode D 2 Cathode and third diode D 3 Cathode connection; first diode D 1 The anode is respectively connected to the first switching tube S 1 Emitter, second switch tube S 2 collector and the left end of the second inductor L 2 connection; the sec...

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Abstract

The invention discloses a monopole non-isolation three-phase Cuk inverter. The inverter consists of six switching tubes, nine diodes, four inductors and four capacitors. The inverter circuit disclosedin the invention can output a three-phase output phase voltage, wherein the peak value of the three-phase output phase voltage can be higher than or lower than other direct current voltage, and the inverter also can be expanded into a three-level inverter. The inverter can be applied to voltage boost-buck occasions without needing a transformer, can complete the inversion function as normal in conditions at relatively low input voltage and with relatively large direct current voltage change range, and also can have stable alternating current output. The inverter has the advantages of small size, high efficiency, low cost, simple circuit structure, easy control, large output voltage range, low harmonic content and the like.

Description

technical field [0001] The invention relates to an inverter in the technical field of power electronic converters, in particular to a single-pole non-isolated three-phase Cuk inverter applicable to voltage-boosting applications. Background technique [0002] An inverter is a power conversion device that converts direct current into alternating current. Compared with single-phase inverters that are mainly used in small and medium power applications, three-phase inverters are more suitable for high-power applications due to their structural characteristics, including various industrial applications such as new energy power generation, motor drives, and aviation power supplies. [0003] The relevant research on the traditional three-phase voltage-type inverter has been very mature, and it is widely used. However, the output AC voltage on the inverter side of the traditional three-phase voltage inverter is lower than the input voltage on the DC side, that is, it is in a step-do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387
CPCH02M7/5387
Inventor 王立乔韩啸张检亮
Owner YANSHAN UNIV
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