Novel high-gain dual-input DC-DC converter

A DC-DC, dual-input technology, applied in the direction of conversion of DC power input to DC power output, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of low energy utilization rate and many times of energy conversion, and achieve The effect of improving energy utilization, expanding the application range, and reducing the number of energy conversions

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

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Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the present invention focuses on solving the problems of many times of energy conversion caused by the parallel structure of the energy storage unit, low energy utilization rate and increasing the input and output voltage gain.

Method used

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  • Novel high-gain dual-input DC-DC converter
  • Novel high-gain dual-input DC-DC converter
  • Novel high-gain dual-input DC-DC converter

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Embodiment Construction

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0046] Such as figure 1 As shown, a new type of high-gain dual-input DC-DC converter is composed of input unit A, step-up units B and C, and load unit D, and its internal connection relationship is:

[0047] The input unit consists of a basic Sepic circuit and a basic Cuk circuit, containing three inductors L 1 , L 3 , L 4 , four capacitors C 3 、C 5 、C 7 、C 8 , three power switches S 1 , S 2 , S 3 , four diodes D 1 、D 2 、D 3 、D 4 ; Its connection form is as follows: Diode D 1 The anode of the PV input is connected to the positive pole, and the cathode is connected to the inductor L 1 one end, and through the power switch S 2 Connected to the positive pole of the energy storage unit, the inductance L 1 The other end of the power switch S 1 Connect to the negative pole of the photovoltaic input, capacitor C 3 one end of the L 1 the other end...

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Abstract

A novel high-gain double-input DC-DC converter comprises an input unit, a first boosting unit, a second boosting unit and a load unit, wherein the input unit comprises three inductors L1, L3 and L4, four capacitors C3, C5, C7 and C8, three power switches S1, S2 and S3 and four diodes D1, D2, D3 and D4; the first boosting unit comprises an inductor L2, a capacitor C4 and a diode D5, and the second boosting unit comprises an inductor L5, a capacitor C6 and a diode D6. Compared with an existing scheme, the converter can remarkably reduce the number of times of electric energy conversion among the micro power source, the storage battery and the load, improves the electric energy conversion efficiency, has the advantages of being wide in input and output voltage adjusting range, low in switching device voltage stress and the like, and can achieve N-path boost expansion.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a novel high-gain double-input DC-DC converter. Background technique [0002] With the increasing 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 smooth 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 balancing the power generation output of the energy storage unit and improving the power supply stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M1/088H02M1/42H02J7/35H02J7/00H02J1/10
CPCH02M3/1582H02M1/088H02M1/42H02J7/35H02J7/0063H02J1/10Y02B70/10
Inventor 邾玢鑫戴俊平支树播赵宇辉李振华杨楠王凯宏
Owner CHINA THREE GORGES UNIV
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