Boost-improved boost gain Cuk converter single-switch DC-DC circuit

A DC-DC, single switch technology, applied in UPS and smart grid, electric energy storage, electric vehicle field, can solve the problems of intermittent diode current, low voltage gain, large output ripple, etc., to achieve continuous input current, Effect of improving voltage gain and conversion efficiency

Inactive Publication Date: 2021-02-09
FUZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quadratic Boost converter is a quadratic high-gain circuit in which two Boost converters are integrated into a single controllable switching device. The quadratic Boost converter has the characteristics of good voltage gain and no sudden change in input current, but The diode current is intermittent and the output ripple is large; the traditional boost Cuk converter topology has the advantages of small continuous output current ripple and continuous input current, but it also has the disadvantage of low voltage gain

Method used

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  • Boost-improved boost gain Cuk converter single-switch DC-DC circuit
  • Boost-improved boost gain Cuk converter single-switch DC-DC circuit
  • Boost-improved boost gain Cuk converter single-switch DC-DC circuit

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Embodiment Construction

[0018] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0019] like figure 1 As shown, this embodiment provides a Boost-improved boost gain Cuk converter single-switch DC-DC circuit, the design content of its circuit part is specifically: DC input power supply U i , the first inductance inductance L 1 , the first power diode D 1 , the second power diode D 2 , the first bus capacitor C 1 , the second inductance L 2 , Power MOS switch tube Q 1 , Intermediate capacitance C 2 , Improving the first capacitor C of the boost gain network 3 , Improving the second capacitor C of the boost gain network 4 , the third power diode D 3 , the fourth power diode D 4 , the fifth power diode D 5 , the third inductance L 3 , output capacitance C 5 , load RL.

[0020] The positive pole of the DC power supply is connected to the first inductor L 1 a1 terminal; the first inductance L 1 The a2 termin...

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Abstract

The invention relates to a Boost-improved boost gain Cuk converter single switch DC-DC circuit. The circuit comprises a Boost conversion unit and an improved boost gain Cuk conversion unit with a switched capacitor unit. The Boost conversion unit and the improved boost gain Cuk conversion unit with the switched capacitor unit multiplex a switching tube into a single-switch high-gain circuit; and the input of the Boost conversion unit is connected with a direct-current power supply, and the output end of the improved boost gain Cuk conversion unit with the switched capacitor unit is connected with a load. The circuit provided by the invention has the characteristics of continuous input power supply current and relatively small output current ripple; and high voltage gain, high conversion efficiency and low electromagnetic interference are realized.

Description

technical field [0001] The invention belongs to the fields of electric energy storage, electric vehicles, UPS and smart grid, and in particular relates to a Boost-improved boost gain Cuk converter single-switch high-gain DC-DC circuit. Background technique [0002] Solar energy, wind energy, hydrogen energy, etc. are considered to be the main foundation of the future world energy structure and one of the effective ways to solve the energy crisis. However, the output voltage of new energy generating units such as photovoltaics and fuel cells is far lower than the DC bus voltage required for grid connection. Therefore, for this type of new energy power generation system, a high-gain step-up DC-DC converter is an essential component. In addition, high-gain step-up DC-DC converters also play an important role in applications such as UPS power supply systems, electric vehicles, aviation power supplies, and lighting smart grid systems. The quadratic Boost converter is a quadrati...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M3/158H02M1/44H02M1/32H02M1/14
CPCH02M1/14H02M1/32H02M1/44H02M3/156H02M3/158
Inventor 林维明肖健
Owner FUZHOU UNIVERSITY
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