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A switched-inductance quasi-switching boost dc-dc converter

A quasi-switching step-up, DC-DC technology, applied in the direction of adjusting electrical variables, converting DC power input to DC power output, instruments, etc., can solve the problems of small output voltage variation range, no longer applicable, etc., to achieve convenient control, The effect of increasing the output voltage and high output voltage gain

Active Publication Date: 2018-09-14
DONGGUAN SHILONG FUHUA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The switching boost converter SBI proposed in recent years has a small output voltage variation range. In the occasions of low voltage input and high voltage output, such as distributed energy grid-connected systems and fuel cell systems, the traditional SBI converter becomes no longer suitable. Be applicable

Method used

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  • A switched-inductance quasi-switching boost dc-dc converter
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  • A switched-inductance quasi-switching boost dc-dc converter

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Embodiment Construction

[0010] The technical solution of the present invention has been described in detail above, and the specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0011] refer to figure 1 , a switched inductance type quasi-switching step-up DC-DC converter circuit according to the present invention, comprising a voltage source, composed of a first inductance, a second inductance, a fourth diode, a fifth diode and a sixth and second A switch inductance unit composed of a pole tube, a two-terminal quasi-switch boost unit composed of a first capacitor, a first diode, a first MOS tube, a third diode and a switch inductance unit, a second MOS tube, and a second capacitor, second diode, output diode D o , output filter capacitor and load R L . When the first MOS tube S 1 and the second MOS tube S 2 While conducting, the first diode D 1 , the second diode D 2 , the third diode D 3 and the fifth diode D 5 are t...

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Abstract

The present invention provides a switched inductance type quasi-switch boost DC-DC converter circuit, comprising a voltage source consisting of a first inductance, a second inductance, a fourth diode, a fifth diode and a sixth diode The switch inductance unit constituted, the two-terminal quasi-switch boost unit composed of the first capacitor, the first diode, the first MOS transistor, the third diode and the switch inductance unit, the second MOS transistor, the second capacitor, second diode, output diode, output filter capacitor and load. The structure of the whole circuit is simple, and the expansion of the output voltage gain is realized by combining the single-stage boosting characteristics of the quasi-switching boost unit, the switched capacitor unit and the switched inductor unit.

Description

technical field [0001] The invention relates to the technical field of power electronic circuits, in particular to a switch inductance quasi-switch step-up DC-DC converter circuit. Background technique [0002] In fuel cell power generation and photovoltaic power generation, due to the low DC voltage provided by a single solar cell or a single fuel cell, it cannot meet the electricity demand of existing electrical equipment, nor can it meet the needs of grid connection. It is often necessary to combine multiple batteries connected in series to achieve the desired voltage. On the one hand, this method greatly reduces the reliability of the entire system, and on the other hand, it needs to solve the problem of series voltage equalization. For this reason, a high-gain DC-DC converter capable of converting low voltage to high voltage is required. The switching boost converter SBI proposed in recent years has a small output voltage variation range. In the occasions of low volta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCH02M3/155H02M3/1552
Inventor 张波朱小全丘东元
Owner DONGGUAN SHILONG FUHUA ELECTRONICS
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