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Bidirectional two-input CUCK/SEPIC direct current converter and power distribution method thereof

A DC converter, double-input technology, applied in the direction of conversion equipment, collectors, transportation and packaging without intermediate conversion to AC, can solve the problems of high cost and complex structure, achieve low loss, realize energy feedback, optimize The effect of distribution

Inactive Publication Date: 2013-09-18
CHANGZHOU RUIHUA POWER ELECTRONICS DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional new energy joint power supply system, each energy form usually requires a DC / DC converter to convert various energy sources into DC output, and connect them in parallel to the common DC bus to supply DC loads, but its structure is more complicated. and higher cost

Method used

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  • Bidirectional two-input CUCK/SEPIC direct current converter and power distribution method thereof
  • Bidirectional two-input CUCK/SEPIC direct current converter and power distribution method thereof
  • Bidirectional two-input CUCK/SEPIC direct current converter and power distribution method thereof

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0030] Such as figure 1 As shown, a bidirectional dual-input CUCK / SEPIC DC converter includes a CUCK pulse voltage source unit, a SEPIC pulse current source unit and an output filter circuit;

[0031] The SEPIC pulse current source unit includes a first input DC voltage source V 1 , the first power switch tube M 1 , the third power switch tube M 3 , the first inductance L 1 , the second inductance L 2 and the first capacitor C 1 , the first input DC voltage source V 1 The positive pole of the first inductor L 1 One end of the connection, the first inductor L 1 The other end of the first power switch tube M 1 The drain, the first capacitor C 1 One end of the connection, the first capacitor C 1 The other end of the third power switch tube M 3 The source, the second inductance L 2 One end of the connection, the first input DC voltage s...

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Abstract

The invention discloses a bidirectional two-input CUCK / SEPIC direct current converter and a power distribution method thereof. The direct current converter comprises a CUCK pulse voltage source, a SEPIC pulse current source and an output filter circuit, wherein the SEPIC pulse current source comprises a first input direct-current voltage source A, first and third power switch tubes M1 and M3, first and second inductors L1 and L2 and a first capacitor C1, the CUCK pulse voltage source comprises a second input direct-current voltage source B, second and fourth power switch tubes M2 and M4, a third inductor L3 and a second capacitor C2, the CUCK pulse voltage source is embedded in the SEPIC pulse current source, and the output filter circuit comprises an output filter capacitor C. The power distribution method of the direct current converter comprises that power distribution and load feedback power control are performed on the two input sources. According to the bidirectional two-input CUCK / SEPIC direct current converter and the power distribution method thereof, voltage boosting and reduction and energy feedback can be achieved, the circuit efficiency is high, no isolation transformer is required, and the bidirectional two-input CUCK / SEPIC direct current converter is applicable to middle-and-low-power new-energy joint power supply systems.

Description

【Technical field】 [0001] The invention relates to the field of power electronic converters, in particular to a bidirectional double-input CUCK / SEPIC DC converter and a power distribution method thereof. 【Background technique】 [0002] With the increasingly prominent environmental protection issues, people pay more and more attention to the development and utilization of renewable energy. Renewable energy has the characteristics of cheap, reliable, clean and pollution-free, and abundant energy, so renewable energy power generation has shown a good market prospect. At present, the most widely used renewable energy power generation forms include photovoltaic power generation, fuel cell power supply, wind power generation, hydropower generation, geothermal power generation, etc., but these power generation forms have the characteristics of unstable power supply, discontinuity, and changes with climate conditions. , so a distributed power supply system using multiple energy sour...

Claims

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Application Information

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IPC IPC(8): H02M3/10H02J7/35
Inventor 颜辉陈雪筠孙祥玉邵凌翔孙孝峰
Owner CHANGZHOU RUIHUA POWER ELECTRONICS DEVICES
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