High-gain Trans-Z source boost converter

A boost converter, high-gain technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc. Foreground, the effect of continuous input current

Inactive Publication Date: 2016-04-27
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

However, many step-up DC / DC converters are limited by the duty cycle, heat generation and loss, and cannot achieve a large boost. For example, the Boost converter has a voltage gain of 1 / (1-D), where D is the duty cycle ratio, 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 there is still room for improvement

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Embodiment Construction

[0011] The present invention will be described in further detail in conjunction with the following examples 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 analysis, 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 first inductance L 1 current i L1 , The magnetizing inductance L of the transformer T m current i Lm , the first capacitance C 1 Voltage V...

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Abstract

The invention provides a high-gain Trans-Z source boost converter. The converter comprises a direct-current input power supply Vin, a first inductor (L1), a first diode (D1), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a second diode (D2), a transformer (T) with the turn ratio of 1 to n, a switch tube (S), a third diode (D3), an output capacitor (Cout) and a load. The converter is mainly characterized in that a positive electrode of the direct-current input power supply Vin is connected with one end of the first inductor (L1). Compared with a Boost converter, a quasi Z source converter and the like, the high-gain Trans-Z source boost converter has a higher voltage gain, and is suitable for the occasion of non-isolating high-gain direct-current voltage conversion.

Description

technical field [0001] The invention relates to the field of DC / DC converters, in particular to a high-gain Trans-Z source step-up converter. Background technique [0002] The development of renewable energy power generation systems such as photovoltaics and fuel cells has become one of the important means to solve the shortage of fossil fuels and protect the environment. However, the output voltage of photovoltaics and fuel cells is very low, and DC / DC converters are generally required to boost the voltage. However, many step-up DC / DC converters are limited by the duty cycle, heat generation and loss, and cannot achieve a large boost. For example, the Boost converter has a voltage gain of 1 / (1-D), where D is the duty cycle ratio, 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 there is still room for im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCH02M3/155H02M3/1555Y02E10/56
Inventor 张波沈瀚云罗安
Owner SOUTH CHINA UNIV OF TECH
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