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High-gain taping inductor quasi-Z-source converter

A tapped inductance, high-gain technology, applied in the direction of adjusting electrical variables, converting DC power input to DC power output, instruments, etc. The effect of wide application prospects

Inactive Publication Date: 2016-07-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many step-up DC / DC converters are limited by the duty cycle, parasitic parameters and losses, and cannot achieve a large boost. For example, the flyback converter has a voltage gain of nD / (1-D), where n is the transformer Turn ratio, D is the duty cycle, but due to the influence of parasitic parameters, its gain is limited; another example is the quasi-Z source converter, its voltage gain is 1 / (1-2D), which has a certain improvement compared with the Boost converter , but it is still difficult to meet the needs of practical applications

Method used

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Embodiment Construction

[0011] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto. It should be noted that, if there are any processes or parameters that are not specifically described in detail below, those skilled in the art can understand or implement them with reference to the prior art.

[0012] The basic topological structure of the present invention and the voltage and current reference direction of each main component are as follows: figure 1 shown. For the convenience of verification, the devices in the circuit structure are regarded as ideal devices. The drive signal v of the switch tube S GS , the first diode D 1 current i D1 , the second diode D 2 current i D2 , the third diode D 3 current i D3 , the fourth diode D 4 current i D4 , the fifth diode D 5 current i D5 , The magnetizing inductance L of the transformer T m current i Lm , ...

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Abstract

The present invention provides a high-gain taping inductor quasi-Z-source converter. The converter comprises a direct current input power supply (Vin), a transformer (T) with a turn ratio of 1:n, a first diode (D1), a second diode (D2), a third diode (D3), a first capacitor (C1), a second capacitor (C2), a first inductor (L1), a third capacitor (C3), a fourth diode (D4), a fourth capacitor (C4), a second inductor (L2), a switch tube (S), a fifth diode (D5) , an output capacitor (Cout) and a load. Compared with a flyback converter, the high-gain taping inductor quasi-Z-source converter has high voltage gain and is suitable for the occasion of non-isolated high gain direct voltage transformation.

Description

technical field [0001] The invention relates to the field of DC / DC converters, in particular to a high-gain tapped inductance quasi-Z source converter. Background technique [0002] With the increasing demand for energy and the increasingly serious environmental problems caused by traditional fossil energy, people began to pay attention to the development and application of new energy. New energy power generation is one of the applications, but in the new energy power generation system, the output voltage of fuel cells and photovoltaic cells is low and has a large fluctuation range, so it usually needs a step-up DC / DC converter to convert low voltage into stable high voltage DC, and then connected to the grid through the inverter. However, many step-up DC / DC converters are limited by the duty cycle, parasitic parameters and losses, and cannot achieve a large boost. For example, the flyback converter has a voltage gain of nD / (1-D), where n is the transformer Turn ratio, D i...

Claims

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Application Information

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IPC IPC(8): H02M3/155
CPCH02M3/155H02M3/1552
Inventor 张波沈瀚云罗安
Owner SOUTH CHINA UNIV OF TECH
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