A single-phase high-gain boost converter

A boost converter, high-gain technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve problems such as difficulty in meeting high-gain conversion requirements, large switching current spikes, and large input current ripple, etc. To achieve the effect of easy input current filtering, small input current ripple, and voltage gain

Active Publication Date: 2016-06-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the most commonly used boost converter is a single-tube Boost converter. However, the boost range of this converter is very limited. Usually, the boost multiple is within ten times, and it is difficult to meet the high-gain conversion requirements.
Based on the conventional single-transistor Boost converter, the coupled inductor technology can achieve gain expansion, but the input current ripple is large
Gain expansion can also be achieved by using switched capacitor technology. This technology has a simple circuit structure and is easy to implement, but it has the disadvantages of large switch current peak impact and limited voltage gain, and the gain of the converter is proportional to the complexity of the structure, that is The higher the gain, the more complex the circuit

Method used

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  • A single-phase high-gain boost converter
  • A single-phase high-gain boost converter
  • A single-phase high-gain boost converter

Examples

Experimental program
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Embodiment

[0029] Such as figure 1 As shown, a single-phase high-gain boost converter includes a voltage transfer circuit X, a coupled inductor boost circuit Y, and an output circuit Z that are connected in sequence.

[0030] The voltage transfer circuit X includes a first inductor L 1 , The switch tube S and the first capacitor C 1 ;

[0031] The coupled inductor boost circuit Y includes a primary winding L of the coupled inductor 21 And the secondary winding L of the coupled inductor 22 , The second capacitor C 2 , The third capacitor C 3 , The first diode D 1 And the second diode D 2 ;

[0032] The output circuit includes a third diode D 3 , The fourth capacitor C 4 And load R.

[0033] The first inductor L 1 And the input power V g The positive connection, the first inductor L 1 The other end of the switch tube S and the first capacitor C 1 One end connected;

[0034] The source of the switch S and the input power V g The negative connection;

[0035] The first capacitor C 1 The other end is co...

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PUM

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Abstract

The invention provides a single-phase high-gain boost converter, which mainly includes a voltage transfer circuit, a coupling inductor boost circuit and an output circuit connected in sequence. The voltage transfer circuit includes a first inductor, a switch tube, and a first capacitor; the coupled inductor boost circuit includes a primary winding and a secondary winding of a coupled inductor, a second capacitor, a third capacitor, a first diode, and a second diode; the output circuit includes a third diode, a fourth capacitor and a load. The invention has simple structure and high output voltage gain.

Description

Technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a single-phase high-gain boost converter. Background technique [0002] In the field of new energy, such as solar power generation or fuel cell systems, since a single module provides low-voltage direct current, and the actual required voltage level is usually higher, it requires high efficiency, high gain, and stable performance. The boost converter converts low-voltage direct current into high-voltage direct current suitable for actual needs. [0003] At present, the most commonly used boost converter is a single-tube Boost converter. However, the boost range of this type of converter is very limited, and the boost multiples are usually within ten times, which is difficult to meet the conversion requirements of high gain. Based on conventional single-tube Boost converters, coupled inductance technology can achieve gain expansion, but the input current ripple is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10
Inventor 张波张能
Owner SOUTH CHINA UNIV OF TECH
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