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Interleaved parallel buck chopper DC current source energy storage control system and its control method

A DC current source and energy storage control technology, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve the problem of large cutting current ripple, low-frequency oscillation cost, poor cutting quality, etc. problem, achieve the effect of reducing the harm of harmonic current, increasing dynamic response speed, and increasing real-time performance

Active Publication Date: 2016-01-20
江阴市六和智能设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the quality of DC power supply includes voltage stability, peak-to-peak value of ripple and ripple frequency. If these indicators are poor, the ripple of the cutting current will be large, and the cutting quality must be poor.
To this end, these indicators need to be improved. At present, the common method is to increase the capacitance of the electrolytic capacitor, but blindly increasing the capacitance of the electrolytic capacitor will also bring about low-frequency oscillation, cost, and excessive volume. Therefore, high-power design and output current refinement are important Problems that must be faced and solved in the interleaved parallel buck chopper DC current source energy storage control system;

Method used

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  • Interleaved parallel buck chopper DC current source energy storage control system and its control method

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Embodiment Construction

[0030] see figure 1 , the present invention relates to an interleaved parallel step-down chopper DC current source energy storage control system, the system includes a power circuit and a control circuit;

[0031] The power circuit includes a step-down circuit 21, a chopper circuit 22 and a cutting torch circuit 23;

[0032] The step-down circuit is a power frequency transformer, which includes a primary coil with star connection (Y connection), a secondary coil with star connection (Y connection) and a secondary coil with delta connection (△ connection). primary coil, and the star-connected primary coil inputs 380V three-phase AC power supply, the initial phases of the star-connected secondary coil and the delta-connected secondary coil are 0° and 30° respectively, and the output voltage is 220V;

[0033] The chopping circuit includes a first interleaved BUCK circuit and a second interleaved BUCK circuit;

[0034] The first interleaved BUCK circuit includes a first diode un...

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Abstract

The invention relates to an interleaving buck chopper direct-current source energy storage control system and method. The system comprises a power circuit and a control circuit, and the power circuit comprises a buck circuit and a chopper circuit; the buck circuit is an industrial frequency transformer, the industrial frequency transformer comprises a primary coil and two secondary coils, the chopper circuit comprises two groups of BUCK circuits which are connected in parallel, and the two groups of BUCK circuits are connected with the two secondary coils respectively. The interleaving buck chopper direct-current source energy storage control system and method can support 260A output direct currents, are simple in circuit and convenient to control, and meanwhile have the advantages of being high in input power factor (above 0.96), low in output direct current ripple and the like.

Description

technical field [0001] The invention relates to a control system and a control method thereof, in particular to an interleaved parallel step-down chopper DC current source energy storage control system, which belongs to the fields of plasma cutting and power electronic conversion. Background technique [0002] The machine plasma cutting device is composed of mechanical equipment, electric control equipment, gas supply equipment, etc. The electric control equipment includes power supply system, numerical control system, cutting torch system and ECAN bus, and the power supply system includes plasma cutting power supply, arc ignition box, Air control box, cooling system, pipeline and other main parts; [0003] Plasma cutting power supply is one of the core components of machine plasma cutting devices. According to the development history, it can include various silicon rectifier power supplies, thyristor rectifier power supplies, inverter power supplies, and chopper power suppl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217
Inventor 田威
Owner 江阴市六和智能设备有限公司
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