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A novel scalable Zeta DC-DC converter

A converter, a new type of technology, is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables. It can solve the problems of inability to reduce voltage and difficulty in application, and achieve simple control strategies and drive circuits. Voltage stress low effect

Pending Publication Date: 2019-01-25
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the schemes for improving the input and output gain of DC-DC converters in the literature are based on Boost circuits. These circuits usually can only achieve voltage boosting, but not voltage reduction, and are difficult to apply in applications where the input and output voltages vary greatly.

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  • A novel scalable Zeta DC-DC converter
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  • A novel scalable Zeta DC-DC converter

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] Such as figure 2 Shown is the circuit topology diagram when the number of expansion units of the present invention is 1:

[0023] A new type of scalable Zeta DC-DC converter, the converter includes a DC input source, a load R L , a basic Zeta DC-DC converter, and an expansion unit. in:

[0024] A basic Zeta DC-DC converter consists of two inductors L 1 , L 2 , two capacitors C 1 、C 2 , a power switch S 1 , a diode D 1 . Its connection form is as follows: power switch S 1 The drain is connected to the positive pole of the input power supply, and the source is connected to the power inductor L 1 upper end of the capacitor C 1 The left end of the capacitor C 1 The right end of the inductor L 2 left end of the diode D 1 connected to the cathode, the inductor L 2 The right end of the capacitor C 2 connected to the upper end, the inductance...

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Abstract

The invention provides a novel scalable Zeta DC-DC converter. The proposed converter is composed of basic Zeta DC-DC converter and several proposed expansion unit. The proposed expansion unit is composed of an inductor, two capacitors and a diode. By adjusting the number of expansion units, the input and output gain of the converter and the voltage stress of the switching device can be adjusted. Compared to traditional Zeta DC The proposed scheme has the advantages of wide input and output voltage regulation range and switching device voltage stress without changing its control and driving circuits. It is suitable for wide input and output voltage range applications.

Description

technical field [0001] The invention relates to a buck-boost DC / DC converter with wide input and output, in particular to a novel expandable Zeta DC-DC converter. Background technique [0002] Common non-isolated buck-boost DC-DC converters 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 between zero and infinity, but when these converters work in boost mode, affected by the parasitic parameters of the circuit and components, the input and output gains has been severely restricted. In particular, when the duty cycle is close to 1, the input-to-output gain ratio of the converter will decrease. At present, most of the schemes for increasing the input and output gain of DC-DC converters in the literature are based on Boost circuits. These circuits can only achieve voltage boosting, but not voltage reduction, and are difficult to apply in applications where the input and outp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
CPCH02M3/156Y02B70/10
Inventor 邾玢鑫刘光辉陈耀李振华王辉
Owner CHINA THREE GORGES UNIV