A High Gain DC Converter Topology Based on Active Network

A technology of DC converter and topology structure, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., and can solve the problems of deriving high-gain converter topology, singleness, etc.

Active Publication Date: 2021-09-14
YANSHAN UNIV
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Problems solved by technology

However, the existing high-gain DC converter technology based on inductor-capacitor-diode only proposes a single topology or expands the number of topologies by increasing the number of capacitors, and does not derive high gain based on the position transformation of the capacitor in the capacitor unit. Converter topology

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  • A High Gain DC Converter Topology Based on Active Network
  • A High Gain DC Converter Topology Based on Active Network
  • A High Gain DC Converter Topology Based on Active Network

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Embodiment Construction

[0049] The technical solutions of the present invention will be clearly and completely described below through specific embodiments. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] like Figure 1-19 As shown, the high-gain DC converter topology structure based on an active network includes: an input power supply U i , the first inductance L 1 , the second inductance L 2 , the third inductor L 3 , the fourth inductor L 4 , the first power switch tube S 1 , the second power switch tube S 2 , the first diode D 1 , the second diode D 2 , the first capacitor unit, the second capacitor unit, the third capacitor unit, the output diode D o , output filter capacitor C o and load resistance R; among them, t...

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Abstract

The present invention relates to the field of DC converters, in particular to a high-gain DC converter topology based on an active network, including: an input source, four inductors, two power switch tubes, two diodes, three capacitor units, a An output diode, an output filter capacitor and a load resistor; the front stage of the converter is an active network Boost structure composed of two inductors and a power switch tube, and the rear stage is a boost unit composed of an inductor, a capacitor and a diode. On the basis of not increasing the number of capacitors, the present invention deduces the topological composition of the high-gain converter by reasonably changing the position of the capacitor in the step-up unit, which enriches the topological types of the high-gain DC converter; at the same time, the DC converter can complete photovoltaic The high-gain step-up task between the battery and the DC bus required by the grid-connected inverter, and has a small voltage stress on the power device and simple control.

Description

technical field [0001] The invention relates to the field of DC converters, in particular to a high-gain DC converter topology structure based on an active network. Background technique [0002] With the energy crisis and environmental pollution, solar energy and fuel cells have become the main part of the world's energy structure. However, the output voltage of new energy power generation units such as photovoltaics and fuel cells is much lower than the DC bus voltage required for grid connection, and a high-gain boost DC-DC converter is usually required as an interface circuit. [0003] The traditional boost converter can only be used in the occasions where the voltage gain is less than 8, and the boost capability is limited. In order to improve the voltage gain, various topologies of non-isolated high-gain DC converters have been proposed in the prior art. One is to use the multi-stage cascade of converters to achieve high-gain boost, but it requires multiple sets of sw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156H02M1/32
CPCH02M1/32H02M3/156H02M1/322Y02E10/56
Inventor 周悦
Owner YANSHAN UNIV
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