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Novel AC pulse power supply device

A technology of AC pulse and power supply device, applied in the field of new AC pulse power supply device, can solve problems such as difficulty in meeting requirements, and achieve the effects of improving binding force, increasing arc binding force, and improving welding quality

Active Publication Date: 2015-01-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For conventional pulse power supply devices, its frequency can reach above 10KHZ, but it is difficult to meet the requirements of low frequency pulse drop in welding process and high frequency.

Method used

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing description and specific embodiment, the present invention is described in further detail:

[0030] Such as figure 2 Shown is the system block diagram of the present invention combined with DSP, the rectifier filter circuit (1) is composed of rectifier bridges BR1, BR2, BR3, capacitors C1, C2, C3; the high-frequency pulse current circuit is composed of power switch tubes Q1-Q4, transformer T1, diodes D1-D4, twin inductors L1, L2, power switch tubes Q9, Q10. The low-frequency pulse current circuit is composed of power switch tubes Q5-Q8, transformer T2, diodes D5-D8, twin inductors L3, L4, and power switch tubes Q11, Q12. The high-frequency pulse drive circuit (5) is connected between the DSP control system (12) and the power switch tubes Q1-Q4 in the high-frequency pulse circuit (2), and the low-frequency pulse drive circuit (4) is connected between the DSP control system 12 and the low-frequency pulse circuit (2). Betwe...

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Abstract

The invention relates to a novel AC pulse power supply device, which comprises a rectifying and filtering circuit, a high-frequency pulse circuit, a low-frequency pulse circuit and a high-voltage arc-stabilizing circuit; three-phase AC is respectively input to the low-frequency pulse circuit and the high-frequency pulse circuit through the rectifying and filtering circuit, wherein the high-frequency pulse circuit outputs square waves with symmetrical positive and negative values and the frequency of 5KHZ-40KHZ, and the low-frequency pulse circuit outputs square waves with symmetrical positive and negative values and the frequency of 0.2HZ-20HZ; the high-frequency pulse circuit and the low-frequency pulse circuit are superimposed at a load to obtain a wave form with alternation of a string of positive pulses and a string of negative pulses and the frequency of 0.2HZ-20HZ, and the frequency of each pulse is 5KHZ-40KHZ; and the three-phase AC is input to the high-voltage arc-stabilizing circuit through the rectifying and filtering circuit, and the high-voltage arc-stabilizing circuit outputs a square wave current to the load when the superimposed current exceeds zero so as to provide extra voltage for the load.

Description

technical field [0001] The invention belongs to a novel AC pulse power supply device, which is a novel superposition circuit of a high-frequency AC pulse circuit and a low-frequency AC pulse circuit, and belongs to the technical field of modern power electronics. technical background [0002] A power supply is a device that provides electrical energy and has been widely used in industrial fields. The welding power supply is the main equipment to realize the welding process. The welding power supply started from the arc welding generator in the 1950s, and experienced the development process of diode rectifier power supply, thyristor rectifier power supply to inverter welding power supply. With the development of electronic power devices, the switching frequency of power switch tubes can reach more than tens of kilohertz. In the welding process, we hope to realize the control of one pulse and one droplet in the low frequency state of 0.2HZ-20HZ, and hope that there will be hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M9/06
Inventor 黄鹏飞卢振洋卢扬扬张永刚白韶军
Owner BEIJING UNIV OF TECH
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