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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 the problems of difficult to meet high-gain conversion requirements, large switch current peak impact, large input current ripple, etc. Achieve the effect of facilitating input current filtering, small input current ripple, and realizing voltage gain

Active Publication Date: 2014-01-01
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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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 connected in sequence.

[0030] The voltage transfer circuit X includes a first inductor L 1 , switch tube S and 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 of the coupled inductor L 22 , the second capacitance 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 inductance L 1 One end of the input supply V g The positive connection of the first inductor L 1 The other end of the switch tube S drain, the first capacitor C 1 one end of the connection;

[0034] The source of the switching tube S is connected to the input power supply V g negative connec...

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Abstract

The invention provides a single-phase high-gain boost converter. The single-phase high-gain boost converter mainly comprises a voltage transfer circuit, a coupling inductance booster circuit and an output circuit, wherein the voltage transfer circuit, the coupling inductance booster circuit and the output circuit are connected in sequence. The voltage transfer circuit comprises a first inductor, a switching tube and a first capacitor. The coupling inductance booster circuit comprises a primary winding and a secondary winding which are coupled with the inductor, a second capacitor, a third capacitor, a first diode and a second diode. The output circuit comprises a third diode, a fourth capacitor and a load. The single-phase high-gain boost converter is simple in structure and high in 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 new energy fields such as solar power generation or fuel cell systems, since a single module provides low-voltage direct current, the actual required voltage level is usually higher, so a high-efficiency, high-gain, and stable performance is required 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 converter is very limited. Usually, the boost multiple is within ten times, and it is difficult to meet the conversion requirements of high gain. Based on the conventional single-transistor Boost converter, the coupled inductor technology can be used to achieve gain expansion, but the input current ri...

Claims

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Application Information

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IPC IPC(8): H02M3/10
Inventor 张波张能
Owner SOUTH CHINA UNIV OF TECH
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