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Buck-Boost DC-DC converter with high-gain boosting capability

A buck-boostdc-dc and converter technology, applied in the field of DC/DC converters, can solve problems such as low input and output gain, and achieve the effects of low switching voltage stress, simple control strategy and driving circuit

Pending Publication Date: 2019-03-22
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of low input and output gain in the existing Buck-Boost DC-DC converter, the present invention proposes a Buck-Boost DC-DC converter with high gain boosting capability based on the basic Buck-Boost circuit

Method used

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  • Buck-Boost DC-DC converter with high-gain boosting capability
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  • Buck-Boost DC-DC converter with high-gain boosting capability

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] Such as figure 2 Shown:

[0024] A Buck-Boost DC-DC converter with high gain boost capability, the converter includes a DC input source, a load R L , a basic Buck-Boost converter, and a gain unit. in:

[0025] A basic Buck-Boost converter consists of an inductor L 1 , a capacitor C 1 , a power switch S 1 , a diode D 1 . Its connection form is as follows: switch S 1 The drain is connected to the positive pole of the input power supply, and the source is connected to the inductor L 1 upper end of the diode D 1 the cathode of the diode D 1 The anode and capacitor C 1 connected to the upper end, the inductance L 1 the lower end of the capacitor C 1 The lower end is connected to the negative pole of the input power supply.

[0026] The gain unit contains: an inductor L 11 , a diode D 11 , two capacitors C 11 、C 12 . where capacitance C ...

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Abstract

The invention provides a Buck-Boost DC-DC converter with high-gain boosting capability. The Buck-Boost DC-DC converter consists of a basic Buck-Boost converter and a plurality of gain units. Each gainunit is composed of an inductor, two capacitors and a diode. The adjustment of input and output gains and switching voltage stress of the Buck-Boost converter can be realized by adjusting the numberof the gain units. The Buck-Boost DC-DC converter has the advantages of simple control and driving circuit, wide input and output voltage adjustment range, low switching device voltage stress and thelike, and is suitable for application occasions with a wide input and output voltage variation range and requiring high-gain boost transformation and buck transformation simultaneously.

Description

technical field [0001] The invention relates to a DC / DC converter capable of both step-down and high-gain boost, in particular a Buck-Boost DC-DC converter with high-gain boost capability. Background technique [0002] The Buck-Boost DC-DC converter has been widely used in industrial applications due to its advantages of simultaneously boosting and boosting the input voltage and having fewer switching devices. However, due to the influence of the parasitic parameters of the circuit and components, its boosting capability is greatly limited, which makes the traditional Buck-Boost converter only suitable for occasions where the input and output gains are not high. Most of the solutions are based on Boost converters. Although these solutions can achieve high-gain boost capability, most of them cannot realize step-down conversion at the same time. It is difficult to apply to occasions that require both step-down and high-gain boost. Therefore, just build It is of great signific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
CPCH02M3/156H02M3/1582
Inventor 邾玢鑫胡施施杨楠李振华黄悦华
Owner CHINA THREE GORGES UNIV
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