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Sepic-based multi-working-condition high-gain three-port DC-DC converter

A technology of DC-DC and converters, applied in the field of multi-working condition high-gain three-port DC-DC converters, can solve the problems of low energy utilization rate and many times of energy conversion, so as to improve energy utilization rate and expand the application range , the effect of reducing the number of energy conversions

Pending Publication Date: 2022-01-04
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention solves the problems of many times of energy conversion caused by the parallel structure of the energy storage unit, low energy utilization rate and improvement of input and output voltage gain, etc.

Method used

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  • Sepic-based multi-working-condition high-gain three-port DC-DC converter
  • Sepic-based multi-working-condition high-gain three-port DC-DC converter
  • Sepic-based multi-working-condition high-gain three-port DC-DC converter

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with accompanying drawing.

[0042] Such as figure 1 As shown, a Sepic-based multi-condition high-gain three-port DC-DC converter consists of a basic Sepic converter, an input unit A, a boost unit B, and a load unit C. The internal connection relationship is as follows:

[0043] The basic Sepic converter and input unit A consists of 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 T...

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Abstract

A multi-working-condition high-gain three-port DC-DC converter based on Sepic comprises a basic Sepic converter, a boosting unit and a load unit, and the basic Sepic converter comprises two inductors L1 and L2, two capacitors C1 and C2, three power switches S1, S2 and S3 and three diodes D1, D2 and D3. The boosting unit comprises an inductor L11, a diode D11, a capacitor C11 and a capacitor C12; and the load unit includes an output load RL. Compared with an existing scheme, the converter can remarkably reduce the number of times of electric energy conversion among a micro power supply, a storage battery and a load, improves the electric energy conversion efficiency, and has the advantages of wide input and output voltage regulation range, low voltage stress of a switching device and the like; meanwhile, 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 Sepic-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, photovoltaic power generation, fuel cell power generation and other new energy power generation technologies have received extensive attention and rapid development. The new energy power generation system including the energy storage unit can stabilize the power generation output of the new energy micro power supply and improve the stability of the system power supply. In the traditional hybrid multi-port converter solution, 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 t...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M1/088H02M1/42H02J7/35H02J7/00H02J1/10
CPCH02M3/158H02M1/088H02M1/42H02J7/35H02J7/0063H02J1/10Y02E10/56
Inventor 邾玢鑫吕洋赵宇辉支树播李振华杨楠马辉王凯宏
Owner CHINA THREE GORGES UNIV