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Multi-input high-boosting DC/DC (Direct Current/Direct Current) converter

A high-boost, multi-input technology, applied in conversion devices and instruments that convert DC power input into DC power output and output power, can solve the problem of insufficient boost capability of multi-input DC/DC converters, and achieve voltage Stress reduction, wide application range, effect of reducing circuit complexity

Inactive Publication Date: 2017-05-31
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a multi-input high-boost DC / DC converter with high boosting capability to solve the problem of insufficient boosting capability of the existing multi-input DC / DC converter

Method used

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Embodiment 1

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings. Implementation example 1: such as figure 2 As shown, a 4-phase 2-unit high boost converter, which includes 4 input power supplies, 2 gain units, 4 power switches S 1 , S 2 , S 3 , S4 , 4 inductors L 1 , L 2 , L 3 , L 4 , 8 capacitors C o 、C 11 、C 12 、C 13 、C 14 、C 21 、C 22 、C 23 、C 24 Among them, 12 diodes D 1 、D 2 、D 3 、D 4 、D 11 、D 12 、D 13 、D 14 、D 21 、D 22 、D 23 、D 24 ;in:

[0024] 4 input ports,

[0025] The first inductance L 1 The input terminal of the input terminal is connected to the positive pole of the input power supply 1, and the output terminal is connected to the capacitor C 11 at one end of the first inductor L 1 and capacitance C 11 The first power switch S is connected between the node of the input power supply 1 and the negative pole 1 , the first power switch S 1 The source is connected to the negative pol...

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Abstract

The invention provides a multi-input high-boosting DC / DC (Direct Current / Direct Current) converter. Compared with a conventional converter, the multi-input high-boosting DC / DC converter is adjusted in input port number, adjustable in input / output gain and conveniently applicable to different application situations. When setting that the multi-input high-boosting DC / DC converter has m input ports, the multi-input high-boosting DC / DC converter has m inductors, m power switches, m output diodes and n gain units; each gain unit consists of m diodes and m capacitors; once one gain unit is added in a circuit, a basic gain can be increased by one time on the basis of the gain of an original circuit. Requirements of large-power high-boosting DC / DC voltage boosting situations can be met. In addition, input current and output voltage of an input end are both controllable, automatic current equalization is achieved, and control on a great number of sensors and complex control strategy design can be avoided. Moreover, compared with a conventional high-boosting technique, the multi-input high-boosting DC / DC converter is free of coupling inductor or transformer, and the voltage stress of switches and diodes is also reduced, so that the converter is relatively high in overall working efficiency.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a multi-input high boost DC / DC converter. Background technique [0002] With the depletion of traditional fossil energy and the resulting environmental problems. Photovoltaic power generation and fuel cell power generation have received more attention and applications due to their safety and cleanness. Photovoltaic or fuel cell power generation systems usually contain multiple power generation units, and the output voltage of each power generation unit is generally within 5oV. A DC-DC converter with high boost capability is used for boosting. Therefore, if a traditional single-input single-output converter is used, there are problems such as complex system structure, large number of converters, and high cost. At present, for photovoltaic or fuel cell power generation systems, many solutions are focused on achieving high boost, and there are few studies on the problem of a large number of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1584
Inventor 邾玢鑫刘崧黄悦华王辉李振华
Owner CHINA THREE GORGES UNIV
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