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Multi-working-condition high-gain three-port DC-DC converter based on Cuk

A DC-DC and converter technology, applied in the field of multi-working condition high-gain three-port DC-DC converter, can solve the problems of high energy conversion times, low energy utilization rate, input and output voltage gain, etc., to expand the application range, The effect of reducing the number of energy conversions and improving energy utilization

Pending Publication Date: 2022-01-21
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems caused by the parallel structure of the energy storage unit, the number of energy conversions is too high, the energy utilization rate is low, and the input and output voltage gain is increased.

Method used

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  • Multi-working-condition high-gain three-port DC-DC converter based on Cuk
  • Multi-working-condition high-gain three-port DC-DC converter based on Cuk
  • Multi-working-condition high-gain three-port DC-DC converter based on Cuk

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing.

[0043] Such as figure 1 As shown, a Cuk-based multi-condition high-gain three-port DC-DC converter is composed of a basic Cuk converter, an input unit A, a boost unit B, and a load unit C. The internal connection relationship is as follows:

[0044] The basic Cuk converter and input unit A contains two inductors L 1 , L 2 , two capacitors C 1 、C 2 , three power switches S 1 , S 2 , S 3 , three diodes D 1 ,D 2 ,D 3 ; Its connection form is as follows: inductance L 1 One end of the power switch S 2 source as well as the diode D 2 connected to the cathode, the inductor L 1 The other end of the diode D 3 The anode of the power switch S 1 the drain as well as the capacitor C 1 Connected to one end of the inductor L 2 One end of the capacitor C 1 the other end of the diode D 1 connected to the anode, the inductor L 2 The other end of the capacitor C 2 One end...

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Abstract

The invention discloses a multi-working-condition high-gain three-port DC-DC converter based on Cuk. The converter comprises a basic Cuk converter with an input unit, a boosting unit and a load unit. The basic Cuk converter with the input unit comprises inductors L1 and L2, capacitors C1 and C2, power switches S1, S2 and S3, and diodes D1, D2 and D3. The boosting unit comprises an inductor L11, a diode D11, a capacitor C11 and a capacitor C12. The load unit includes an output load RL. Compared with the prior art, the converter has the advantages that electric energy conversion frequency among a micro power supply, a storage battery and the load can be remarkably reduced, electric energy conversion efficiency is improved, an input and output voltage regulation range is wide, the voltage stress of a switching device is low and the like, and N-time boosting expansion can be realized for the boosting unit according to requirements.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a Cuk-based multi-working-condition high-gain three-port DC-DC converter. Background technique [0002] With the increasingly serious global problems such as energy crisis, greenhouse effect and air pollution, new energy power generation technologies such as photovoltaic power generation and fuel cell power generation have received extensive attention and rapid development. New energy power generation systems including energy storage units can stabilize new energy The power generation output of the micro power supply improves the stability of the system power supply. [0003] In the traditional hybrid multi-port converter scheme, the new energy micro power supply and energy storage unit are generally connected in parallel with the DC bus through their respective DC / DC converters, although this structure can solve the problem of energy storage unit balancing the power generation output of the ...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M3/00H02J3/32
CPCH02M3/158H02M3/005H02J3/32Y02E10/56
Inventor 邾玢鑫吕洋赵宇辉马辉李振华杨楠
Owner CHINA THREE GORGES UNIV
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