Ultrasonic square wave direct current pulse arc-welding power supply device

A DC pulse and arc welding power supply technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as difficulties, current waveform distortion, and difficulty in realization

Inactive Publication Date: 2008-02-20
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As we all know, when arc welding is performed, the welding current is as high as hundreds of amperes, and it is very difficult to realize hundreds of amperes of super-audio frequency square wave DC pulse current technically until today.
At the same time, due to the

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  • Ultrasonic square wave direct current pulse arc-welding power supply device
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  • Ultrasonic square wave direct current pulse arc-welding power supply device

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Embodiment Construction

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] Referring to Fig. 2, the super-audio frequency square wave DC pulsed arc welding power supply device of the present invention is composed of a pulse peak current switching circuit, a base value current generating circuit, a peak current generating circuit, and a rectifying and filtering circuit;

[0015] In the present invention, the rectifying and filtering circuit and the peak current generating circuit adopt a conventional structure as shown in FIG. 1 . That is, the rectification filter circuit may be composed of a rectifier bridge MD and a filter capacitor C. The peak current generating circuit consists of a half-bridge inverter circuit, a first transformer B 1 , the first diode D 1 , the second diode D 2 , Freewheeling inductance L P , a first current sensor, a first drive circuit, and a first closed-loop PWM control circuit. The connections ...

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Abstract

The present invention discloses a super audio square wave DC pulse power supply equipment used for electric arc welding, which mainly comprises a rectification filter circuit, a peak value current producing circuit, a pulse peak value current switching circuit and a background value current producing circuit. The background value current producing circuit is used for producing the background value current Ib, and is effected on the cathode end of the power diode DP, and the peak value current producing circuit is used for producing the peak value current Ip which outputs the pulse peak value current Ipp through a fifth power switch tube TP and the power diode DP, and then the background value current Ib and the pulse peak value current Ipp are piled, thereby getting the pulse current IF to supply the electrode and workpiece. The super audio square wave DC pulse power supply equipment of the present invention can realize the pulse current frequency not less than 20 kHz, and the pulse current amplitude value is 1 to 300 A, and the ascension rate of the pulse current is not less than 50 A/Mus.

Description

technical field [0001] The invention relates to a super-audio frequency square-wave DC pulse arc welding power supply device, in particular to a super-audio frequency DC pulse power supply topology circuit suitable for arc welding. Background technique [0002] In the field of arc welding, square wave DC pulse current welding is widely used, such as pulse TIG welding, pulse MIG welding and so on. Compared with traditional DC welding, square wave DC pulse welding has remarkable features, such as control of droplet transfer, control of weld shape, control of welding line energy and so on. For DC pulse welding, the pulse frequency is one of the important parameters. For conventional DC pulse TIG and DC pulse MIG welding, the frequency is between a few tenths of a Hz and several hundred Hz. This conventional DC pulsed arc welding power supply is based on the traditional thyristor type, transistor analog type or switching (inverter) power supply, and is realized by controlling t...

Claims

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Application Information

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IPC IPC(8): B23K9/09B23K9/10
Inventor 齐铂金许海鹰黄松涛
Owner BEIHANG UNIV
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