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Multi-module combined converter and soft start control method thereof

A converter, multi-module technology, used in control/regulation systems, conversion of DC power input to DC power output, instruments, etc., to achieve the effect of reducing withstand voltage level, reducing cost, and improving reliability

Inactive Publication Date: 2010-03-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: on the basis of the multi-module input series output parallel combination converter based on the half-bridge DC transformer, a combination converter with high reliability and low cost added with a soft start control circuit and its Soft Start Control Method

Method used

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  • Multi-module combined converter and soft start control method thereof
  • Multi-module combined converter and soft start control method thereof
  • Multi-module combined converter and soft start control method thereof

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Embodiment Construction

[0012] Such as figure 1 As shown, the multi-module input series output parallel combined converter includes n modules, n is a natural number greater than 1, and each module is composed of a half-bridge DC transformer I with soft switching function, current peak suppression and input voltage equalization control circuit II Composed of switching tube drive circuit III, the half-bridge DC transformer I includes a power supply circuit, a conversion circuit, a main transformer and an output rectification filter circuit, the conversion circuit includes two power switch tubes Q1 and Q2, and the output rectification filter circuit includes two diodes D3 and D4, filter capacitor C5 and load R1, current peak suppression and input voltage equalization control circuit II and switch tube drive circuit III constitute the soft start control circuit of the module, wherein: current peak suppression and input voltage equalization control circuit II includes hysteresis comparison Inverter, inver...

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Abstract

The invention discloses a parallel combined converter with multi-module input and serial output as well as a soft start control method thereof, belonging to the field of converter control. A circuit of the converter is formed by adding a current peak value suppression and input voltage-sharing control circuit and a switching pipe drive circuit on the basis of an original combined converter; the sampling voltage of output current is compared with a threshold value of a hysteresis comparator determined by given reference voltage and output to a logical OR-gate through a phase inverter; an inputvoltage sampling value is compared with a threshold level determined by the given reference voltage and then output to the logical OR-gate; when the output of the logical OR-gate is a high level, theswitching pipe is controlled to discharge a soft start capacitor of a drive chip so as to stop outputting drive signals and turn off modules; when the output of the logical OR-gate is a low level, theswitching pipe is controlled to be closed, and the soft start capacitor of the drive chip is charged so as to generate the drive signals and turn on the modules. The invention realizes current peak limiting and module input voltage-sharing, improves the reliability of the converter and reduces the cost.

Description

technical field [0001] The invention relates to a combined converter, in particular to a multi-module input series output parallel combined converter and a soft start control method thereof, belonging to the field of direct-to-direct converter control. Background technique [0002] With the intensification of the global greenhouse effect, the depletion of fossil energy and the development of power electronics technology, new energy represented by wind power has been more and more widely used. [0003] Wind grid-connected power generation is expensive because wind energy is unstable and uncontrollable, which will pollute the grid. Non-grid-connected wind power can directly use electric energy in high-energy-consuming industries such as chemical industry and smelting. These industries use electricity with DC load characteristics, and the load current is generally large. The current from the fan is converted from AC to DC to obtain high-voltage DC for transmission, so a conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 袁海宵曹剑坤王慧贞龚春英
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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