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Double-input direct-current converter using non-isolation type pulse voltage source unit

A DC converter and pulse voltage technology, which is applied in the direction of converting DC power input to DC power output, electrical components, adjusting electrical variables, etc. simple structure

Inactive Publication Date: 2012-05-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In applications that require electrical isolation, from the perspective of the existing DIC topology, there are generally problems such as a large number of switch tubes and complex transformer winding structures. Therefore, it is very necessary to propose a new type with a simpler structure, high efficiency and high power density DIC circuit topology

Method used

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  • Double-input direct-current converter using non-isolation type pulse voltage source unit
  • Double-input direct-current converter using non-isolation type pulse voltage source unit
  • Double-input direct-current converter using non-isolation type pulse voltage source unit

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specific Embodiment 1

[0047] Such as image 3 The complete circuit diagram of the specific embodiment 1 shown, the dual-input DC converter includes: two non-isolated pulse voltage source units PVSC 1, PVSC 2, transformer T r， rectifier circuit, output filter circuit, load R Ld . Define two non-isolated pulse voltage source units PVSC 1 and PVSC 2 as 1# source and 2# source respectively, V in1 and V in2 is the input voltage of 1# source and 2# source, V in1 , Q 1 and Q 3 Form a buck PVSC, V in2 , Q 2 and Q 4 Form another buck PVSC. C 1 、C 2 、C 3 、C 4 for Q 1 , Q 2 , Q 3 , Q 4 The junction capacitance, D 1 、D 2 、D 3 、D 4 for Q 1 , Q 2 , Q 3 , Q 4 of the parasitic body diode. L r To add a resonant inductance to realize the zero-voltage switching of the switching tube, C b is the blocking capacitor. D. R1 、D R2 is the transformer T r Secondary rectifier diode, L f is the filter inductance, C f is the filter capacitor.

[0048] Specific Embodiment 1 There are two wo...

specific Embodiment 2

[0074] Such as Figure 6 The complete circuit diagram of specific embodiment 2 is shown. , the dual-input DC converter includes: two non-isolated pulse voltage source units PVSC 1, PVSC 2, transformer T r， rectifier circuit, output filter circuit, load R Ld . Define two non-isolated pulse voltage source units PVSC 1 and PVSC 2 as 1# source and 2# source respectively, V in1 and V in2 is the input voltage of 1# source and 2# source, V in1 , Q 1 and Q 3 Form a buck PVSC, V in2 , Q 2 and Q 4 Form another buck PVSC. C 1 ~C 4 for Q 1 ~Q 4 The junction capacitance, D 1 ~D 4 for Q 1 ~Q 4 of the parasitic body diode. L r To add a resonant inductance to realize the zero-voltage switching of the switching tube, C b is the DC blocking capacitor, L m for the transformer T r Primary side magnetizing inductance. D. R is the transformer T r Secondary rectifier diode, C f is the filter capacitor.

[0075] The specific embodiment 2 also has two working modes accordi...

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Abstract

The invention relates to a double-input direct-current converter using a non-isolation type pulse voltage source unit, belonging to the technical field of power electronics. The double-input direct-current converter using the non-isolation type pulse voltage source unit comprises two non-isolation type pulse voltage source units, a blocking capacitor, a transformer, a rectifying circuit and an output filtering circuit. The double-input direct-current converter provided by the invention can utilize two non-isolation type pulse voltage source units with the same structure to separately or jointly supply power to a load and also can utilize the non-isolation type pulse voltage source units with different structures to separately or jointly supply power to the load. In the direct-current converter provided by the invention, a circuit topological structure is simple and the quantity of switching tubes is few; all the switching tubes can realize zero-voltage switching-on / off; and the direct-current converter has the advantages of high efficiency and high power density, so that the direct-current converter is applicable to middle-power and small-power new energy resource joint power supply systems.

Description

[0001] technical field [0002] The invention relates to a double-input DC converter using a non-isolated pulse voltage source unit, belonging to the technical field of power electronics. Background technique [0003] With the depletion of fossil energy and the seriousness of environmental pollution, human beings are also devoting themselves to the development and utilization of new energy while continuously researching and developing energy-saving technologies. Compared with conventional energy, new energy is obtained by adopting new technologies and new materials, and systematically developed and utilized on the basis of new technologies. It mainly includes solar energy, wind energy, biomass energy, hydrogen energy, water energy, and geothermal energy. , ocean energy, etc. [0004] However, most new energy sources are limited by climatic conditions, and have the disadvantages of unstable and discontinuous power supply. For this reason, new energy combined power generation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCY02B70/1491Y02B70/10
Inventor 刘福鑫王志成毛韵雨阮新波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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