Single-isolation pressure increase and reduction type multi-input direct current converter

A DC converter, multi-input technology, applied in output power conversion devices, conversion equipment with intermediate conversion to AC, electrical components, etc., can solve problems such as high cost and complex circuit structure, and achieve low cost and conversion efficiency. The effect of high and strong voltage matching ability

Active Publication Date: 2009-09-16
FUZHOU UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to coordinate the work of the renewable energy generation part, multiple energy sources must be connected to the common DC bus after power conversion, so multiple single-input DC converters are required to be connected in parallel at the output end, so there are complex circuit structures, Defects such as high cost

Method used

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  • Single-isolation pressure increase and reduction type multi-input direct current converter
  • Single-isolation pressure increase and reduction type multi-input direct current converter
  • Single-isolation pressure increase and reduction type multi-input direct current converter

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] The circuit structure of the single-isolation buck-boost multi-input DC converter is a multi-input single-output high-frequency inverter circuit that combines multiple input LC filters with a common ground and a common output high-frequency isolated energy storage transformer rectifier filter Circuit connection structure, each input end of the multi-input single-output high-frequency inverter circuit is connected with the output end of each input LC filter in one-to-one correspondence, and the output end of the multi-input single-output high-frequency inverter circuit is connected to the high-frequency energy storage The input terminals of the type transformer are connected, and the multi-input single-output high-frequency inverter circuit is composed of a plurality of single-input single-output high-frequency inverter circuits with selective powe...

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Abstract

The invention relates to a single-isolation pressure increase and reduction type multi-input direct current converter, wherein the circuit structure is formed by connecting one multi-input single-output high-frequency inverter circuit, a plurality of common-ground input LC filters and one common output high-frequency isolation transformation energy-storage commutation filter circuit, wherein each input end of the multi-input single-output high-frequency inverter circuit is correspondingly connected with the output end of each input LC filter and the output end of the multi-input single-output high-frequency inverter circuit is connected with the input end of the high-frequency transformer. The converter has features of input direct current power supply common-ground, no insulation between the high-frequency inverter circuits, insulation between output and input, strong voltage match capability, time-sharing power supply of multi-input power supply, simplest circuit topology, common use of output high-frequency transformer and energy-storage commutation filter circuit, high power density, high conversion efficiency, high reliability of load short circuit and low cost, as the key technique for a middle small capacitance distribution type power supply system of various renewable energy resources.

Description

technical field [0001] The single-isolation buck-boost multi-input DC converter involved in the invention belongs to the power electronic conversion technology. Background technique [0002] The DC converter is a static conversion device that uses power semiconductor devices to convert one DC power into another DC power for DC loads. A converter with high-frequency electrical isolation between the output DC load and the input DC power supply is called an isolated DC converter. The high-frequency electrical isolation components mainly play the following roles in the converter: 1) realize the electrical isolation between the output and input of the converter, and improve the safety reliability and electromagnetic compatibility of the converter; 2) realize the The matching between the output voltage and the input voltage realizes the technical effect that the output voltage of the converter can be higher than, equal to or lower than the input voltage, and its application range...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/22H02M1/14H02M1/12
Inventor 陈道炼陈亦文
Owner FUZHOU UNIV
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