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Double-line double-tube normal shock direct current converter with transformer with two secondary sides

A technology of DC converter and forward converter, applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., to achieve the effects of reducing current rating, increasing output current, and convenient device selection

Inactive Publication Date: 2011-04-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at proposing a new type of forward topology on the basis of the traditional forward converter combined with the characteristics of the DC transformer to solve the problem of power conversion in the occasion of high-power high-voltage input, low-voltage and high-current output

Method used

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  • Double-line double-tube normal shock direct current converter with transformer with two secondary sides
  • Double-line double-tube normal shock direct current converter with transformer with two secondary sides
  • Double-line double-tube normal shock direct current converter with transformer with two secondary sides

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Embodiment Construction

[0014] The main circuit of the dual-channel dual-tube forward DC converter with two secondary sides of the transformer is as follows: figure 1 As shown, the combined structure of two forward converters with two secondary sides is adopted, that is, the transformer of each forward circuit has two secondary sides, in which the primary sides of the two forward converters are connected in parallel, and the two forward converters are connected in parallel. Corresponding secondary sides of the converter are connected in parallel (that is, corresponding secondary sides not belonging to the same transformer are connected in parallel), and share one output filter circuit (output filter inductor and capacitor).

[0015] The specific main circuit topology is as figure 1 shown. The main body is composed of two forward converters with two secondary sides, the two primary sides are connected in parallel, the two secondary sides are interleaved in parallel, and share one output filter circui...

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Abstract

In a large-current output occasion, since the secondary side rectifier diode and freewheel diode of a traditional double-line double-tube normal shock direct current converter bear large currents, and devices are difficult to select. The invention provides a large-current output type large-power double-tube normal shock direct current converter so as to solve the problems that the secondary side circuit has overlarge current quota and the device is difficult to select. The circuit has the following characteristics: a main circuit is characterized in that two double-tube normal shock direct current converters each primary-side transformer of which is provided with two secondary sides are connected in parallel at the primary side, and the secondary sides are in interlacing parallel connection, i.e. the structure that the corresponding secondary sides of the two transformers are connected, thus lowering the current quota of the secondary sides.

Description

technical field [0001] The invention relates to a double-circuit double-tube forward direct-current converter with two secondary sides of a transformer, which belongs to medium and high-power direct-current conversion technology in power conversion. Background technique [0002] At present, high-current output DC converters are applied to various fields such as communication power supply, alkali metallurgical industry and aerospace power supply system. In order to improve the efficiency and reliability of the converter, there are many studies on the topology and control methods of the high-current output DC converter. [0003] The dual-channel dual-transistor forward converter has the advantages of low voltage stress of the primary switching tube, no bridge arm through-circuit, high reliability, etc., and the output is interleaved, the output equivalent duty cycle is twice that of the input, and the filter is reduced at the same time. Inductive volume. However, in applicat...

Claims

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Application Information

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IPC IPC(8): H02M3/338
Inventor 周峰朱琦王慧贞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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