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A double-isolation boosting multi-input direct current convertor

A DC converter, multi-input technology, applied in the direction of output power conversion device, conversion equipment with intermediate conversion to AC, electrical components, etc., can solve the problems of high cost and complicated circuit structure, and achieve low cost and high conversion efficiency High effect with wide application prospect

Active Publication Date: 2009-09-16
FUZHOU UNIV
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  • Abstract
  • 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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  • A double-isolation boosting multi-input direct current convertor
  • A double-isolation boosting multi-input direct current convertor
  • A double-isolation boosting multi-input direct current convertor

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The circuit structure of the double-isolated step-up multi-input DC converter is a multi-input single-output high-frequency transformer that separates multiple active clamp high-frequency inverters with input LC filters and energy storage inductors. The circuit is connected with a shared output rectification and filtering circuit, each input end of the high-frequency transformer is connected with the output end of each high-frequency inverter circuit one by one, and the output end of the high-frequency transformer is connected with the input end of the output rectification and filtering circuit Each of the active clamp high frequency inverter circuits with input LC filter and energy storage inductor is composed of input LC filter, energy storage inductor, active clamp circuit, high frequency inverter The output rectification filter circuit is com...

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Abstract

The invention relates to a double-isolation boosting multi-input direct current convertor. The circuit structure thereof is formed by connecting multiple active clamping high frequency inverter circuits which are isolated from one another and have input LC filters and energy storage inductors with a shared output rectifying filter circuit through a multi-input single-output high frequency transformer with. Each output end of the high frequency transformer is connected with the output end of each high frequency inverter circuit one by one. The output end of the high frequency transformer is connected with the input end of the output rectifying filter circuit. The invention has the input direct current electric sources in the same place or different places, double isolations among the high frequency inverter circuits and between the input and the output, and strong voltage matching capacity. Multiple input electric sources supply power according at the same time or according to different time, and the circuit topology is simple. The high frequency transformer and an output loop are shared. The power density is high, the conversion efficiency is high, the input current has small ripple, the reliability is high in the load short circuit, and the cost is low. The invention provides a key technique for distributed power supply system associatively supplying power by multiple reproducible energy sources.

Description

technical field [0001] The double isolation step-up multi-input DC converter involved in the present 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M1/14
Inventor 陈道炼陈亦文徐志望
Owner FUZHOU UNIV
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