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Voltage-multiplying unit based multi-input high gain Z-source converter

A converter, multi-input technology, applied in conversion devices and instruments that convert DC power input to DC power output and output power, can solve problems such as reducing circuit reliability and paralysis, and achieve voltage stress reduction and voltage gain doubling. Effect

Inactive Publication Date: 2017-08-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional topology, because multiple power inputs are connected in series at the same position, a power failure may cause the overall paralysis, reducing the reliability of circuit operation

Method used

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  • Voltage-multiplying unit based multi-input high gain Z-source converter

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with specific embodiments.

[0014] See figure 1 As shown, the multi-input high-gain Z-source converter provided by this embodiment includes a Z-source boost module, a voltage doubler module, and an output module connected in sequence. The Z-source boost module is powered by a first power supply V i1 , The second power supply V i2 , The third power supply V i3 , The fourth power supply V i4 , The fifth power supply V i5 , The first inductor L 1 , The second inductor L 2 , The first capacitor C 1 , The second capacitor C 2 , The first diode D 1 And a switch tube S, the voltage doubler module is composed of a second diode D 2 , The third diode D 3 , The third capacitor C 3 And the fourth capacitor C 4 The output module is composed of a fourth diode D 4 , The fifth capacitor C 5 And load R constitutes. First power supply V i1 The anode and the first diode D 1 The anode connection; the first power supply V i1 T...

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Abstract

The invention discloses a voltage-multiplying unit based multi-input high gain Z-source converter. The Z-source converter includes a Z-source voltage boosting module, a voltage multiplying module and an output module connected in sequence. The Z-source voltage boosting module is composed of a first power source, a second power source, a third power source, a fourth power source, a fifth power source, a first inductor, a second inductor, a first capacitor, a second capacitor, a first diode and a switch tube. The voltage multiplying module is composed of a second diode, a third diode, a third capacitor and a fourth capacitor. The output module is composed of a fourth diode, a fifth capacitor and a load. According to the invention, multiplication of output voltage gain is realized, voltage stress of the switch tube and the diodes is reduced and interfaces for input of the multiple power sources are also provided at the same time.

Description

Technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a multi-input high-gain Z source converter based on a voltage doubler unit. Background technique [0002] With the rapid development of industrial production, converters play a role as a bridge in the process of electric energy production and conversion, especially high-gain, high-power converters. However, the traditional Boost circuit is affected by parasitic parameters and its own nonlinear characteristics, and the voltage gain is limited. In recent years, scholars such as Peng Fangzheng and Qian Guangming have proposed new Z-source converter topologies. Although the traditional non-isolated Z-source converter topology and the quasi-Z-source converter topology achieve voltage gain improvement at low duty cycles, their voltage output is still limited in response to complex industrial production requirements. At the same time, in the field of new energy and indu...

Claims

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Application Information

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IPC IPC(8): H02M3/155
CPCH02M3/155H02M1/0083
Inventor 陈艳峰陈柱张波丘东元
Owner SOUTH CHINA UNIV OF TECH
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