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Single-input high-reliability capacitor current consistent buck-boost DC-DC converter

A Capacitive Current, Converter Technology

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

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low reliability of the existing non-isolated single-input high-gain DC-DC converter

Method used

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  • Single-input high-reliability capacitor current consistent buck-boost DC-DC converter
  • Single-input high-reliability capacitor current consistent buck-boost DC-DC converter
  • Single-input high-reliability capacitor current consistent buck-boost DC-DC converter

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] Such as image 3 As shown, it is a circuit topology diagram when the number of gain expansion units of the present invention is 2:

[0033] A single-input high-reliability capacitor-current consistent Buck-boost DC-DC converter, the converter comprising: a basic Buck-boost converter and two gain expansion units;

[0034] The basic Buck-boost converter consists of an inductor L 1 , capacitance C 1 , power switch S 1 , Diode D 1 ;

[0035] DC input source u in Positive connection power switch S 1 drain, power switch S 1 The sources are respectively connected to the inductor L 1 One end, diode D 1 cathode, diode D 1 Anode connection capacitor C 1 At one end, the capacitor C 1 The other end, the inductance L 1 The other end is connected to the DC input source u in negative electrode;

[0036] The first gain extension unit contains the inducto...

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Abstract

The invention discloses a single-input high-reliability capacitor current consistent buck-boost DC-DC converter. The converter comprises a direct current input source, a basic buck converter and n gain expansion units; each gain expansion unit is composed of two inductors, two capacitors, a diode and a switching tube, and input and output gains of the converter can be achieved by adjusting the number of the gain expansion units. The converter has the advantages of being simple in control and drive circuit, wide in input and output voltage adjusting range and high in reliability, and when any switch tube in the circuit is damaged, other circuits can work normally. The converter is suitable for application occasions where the change range of output input voltage and output voltage is larger and the reliability requirement is higher.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a Buck-boost DC-DC converter of single-input high-reliability capacitive current consistency type. Background technique [0002] In applications where both the input and output voltages vary widely, the input voltage can be either higher or lower than the output voltage. Common non-isolated buck-boost DC-DC converters applicable at this time include Buck-Boost, Cuk, Sepic and Zeta circuits. Theoretically, by adjusting the duty cycle D, the input and output gains of these converters can vary from zero to infinity, but due to the influence of components and circuit parasitic parameters, the boosting capability of these converters is greatly limited. [0003] At present, most solutions for input and output gain of single-input DC-DC converters are constructed by cascading basic circuits, but the reliability is poor. Therefore, it is of great significance to study a single-input buck-boost DC / D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02M1/08H02M1/32H02M1/42
CPCH02M3/156H02M1/08H02M1/32H02M1/42Y02B70/10
Inventor 邾玢鑫张畅刘佳欣支树播王凯宏杨楠李振华
Owner CHINA THREE GORGES UNIV
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