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Cubic boost conversion system with bootstrap circuit

A conversion system, bootstrap boost technology, applied in the direction of adjusting electrical variables, control/regulation systems, output power conversion devices, etc., can solve problems such as limited boosting capacity and difficult to apply, to increase output power and increase gain than the effect

Active Publication Date: 2021-08-24
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of parasitic parameters in the circuit, its actual boost capability is very limited, and considering the influence of converter transmission efficiency, it is generally only used in low boost (G≤4) places, and it is difficult to apply to photovoltaics, fuel cells, etc. Where high boost is required

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  • Cubic boost conversion system with bootstrap circuit
  • Cubic boost conversion system with bootstrap circuit
  • Cubic boost conversion system with bootstrap circuit

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Embodiment Construction

[0018] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. Now in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.

[0019] see figure 1 , the present invention provides a three-time boost conversion system with a bootstrap circuit, which is connected between a power supply 1 and a load 2, and includes: a secondary BOOST circuit 31, a BOOST circuit 32 and a bootstrap boost circuit 33 , the secondary BOOST circuit 31 includes a first input-side inductor L1, a second input-side inductor L3, an input-side capacitor C2 and a switch tube S. One end of the first input-side inductor L1 is connected to the positive pole of the power sup...

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Abstract

The invention relates to a cubic boost conversion system with a bootstrap circuit, which is connected between a power supply and a load and comprises a secondary BOOST circuit, a BOOST circuit and a bootstrap circuit, the secondary BOOST circuit comprises a first input side inductor, a second input side inductor, an input side capacitor and a switching tube, one end of the first input side inductor is connected with a positive electrode of the power supply, the other end of the input side capacitor is connected with a power supply cathode and a load cathode, the other end of the second input side inductor is connected with one end of a switch tube, a control end of the switch tube is used for being connected with an external controller, and the other end of the switch tube is connected with the other end of the input side capacitor and the load cathode; and the BOOST circuit is connected with the first input side inductor in parallel, and the bootstrap boost circuit is connected between the other end of the second input side inductor and the positive electrode of the load and connected with the positive electrode of the power supply. Therefore, the output electric energy received by the load is greatly increased, and the gain ratio of the converter can be further improved.

Description

technical field [0001] The invention relates to the field of power electronic converters, in particular to a three-time boost conversion system with a bootstrap circuit. Background technique [0002] As a typical boost converter, the BOOST converter has the advantages of simple circuit structure and easy control. When its duty cycle is close to 1, the voltage gain can reach infinity in theory. However, due to the influence of parasitic parameters in the circuit, its actual boost capability is very limited, and considering the influence of converter transmission efficiency, it is generally only used in low boost (G≤4) places, and it is difficult to apply to photovoltaics, fuel cells, etc. Where high boost voltage is required. By cascading multiple BOOST converters to form a secondary BOOST converter, the output voltage can be effectively increased to be suitable for photovoltaic cells and the like. However, the gain of the above converter can be further increased. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
CPCH02M3/156
Inventor 刘树林王成王文强鲜大帅郝雨蒙庹汉宇
Owner XIAN UNIV OF SCI & TECH