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A hybrid quasi-switching step-up dc-dc converter

A quasi-switching step-up, DC-DC technology, applied in the field of hybrid high-gain quasi-switching step-up DC-DC converter circuit, can solve the problems that can no longer meet the requirements, achieve convenient control, increase output voltage, output The effect of high 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 Z-source converter and switching boost converter SBI proposed in recent years are both high-gain DC-DC converters, but in some occasions where a low-voltage input is expected to have a higher voltage output, the traditional Z-source converter and SBI converter becomes no longer able to meet the required

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  • A hybrid quasi-switching step-up dc-dc converter
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  • A hybrid quasi-switching step-up dc-dc converter

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Embodiment Construction

[0012] 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.

[0013] refer to figure 1 , a hybrid quasi-switch boost DC-DC converter circuit according to the present invention, including a voltage source, a quasi-Z source unit, a quasi-switch boost unit, a second MOS tube, a switched capacitor unit, an output diode, an output filter capacitance and load. The quasi-Z source unit is composed of a first inductance, a first capacitor, a first diode, a second inductance and a second capacitor; the quasi-switch boost unit is composed of a second inductance, a first diode, a second The capacitor, the first MOS transistor and the second diode; the switched capacitor unit is composed of the third capacitor and the third diode.

[0014] The specific connection mode of the circuit of the present invention is as follows: t...

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Abstract

The invention provides a hybrid quasi-switching step-up DC-DC converter circuit, which includes a voltage source, a two-terminal quasi-current circuit composed of a first inductance, a first diode, a first capacitor, a second inductance and a second capacitor. Z source unit, a quasi-switch boost unit composed of a second capacitor, a second diode, a first MOS transistor, a first diode and a second inductance, a switch composed of a third capacitor and a third diode Capacitor unit, second MOS tube, output diode, output filter capacitor and load. The invention has a simple circuit structure, combines the single-stage buck-boost characteristics of the quasi-Z source unit and the quasi-switch step-up unit, and the characteristics of parallel charging and series discharge of switched capacitors, and realizes the improvement of the output voltage gain.

Description

technical field [0001] The invention relates to the technical field of power electronic circuits, in particular to a hybrid high-gain quasi-switch boost DC-DC converter circuit combined with a switched capacitor and a quasi-Z source unit. 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 Z-source converter and switching boost converter SBI proposed in recen...

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