Embedded system operated digitalization soft switch inversion arc welder

An embedded system and soft switching technology, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of difficulty in achieving high integration and miniaturization, reducing the size and weight of the converter, and increasing the loss of switching tubes. , to facilitate fault diagnosis, enhance reliability, and reduce switching voltage stress

Inactive Publication Date: 2008-09-10
湖南超宇科技有限公司
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Problems solved by technology

[0004] The traditional hard switching control technology means that when the voltage or current on the switch tube is not zero, the switch tube is forced to be turned on or off. Switching loss is generated in the switch, and the switching loss is proportional to the operating frequency of the switch. In the working converter in the hard switching state, as the frequency rises, on the one hand, the loss of the switching tube will increase signi

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  • Embedded system operated digitalization soft switch inversion arc welder
  • Embedded system operated digitalization soft switch inversion arc welder
  • Embedded system operated digitalization soft switch inversion arc welder

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Embodiment Construction

[0032] Depend on Figure 1 to Figure 5 It can be seen that the present invention adopts the IGBT soft-switching inverter technology, and after the power frequency three-phase 380V power input is rectified, the IGBT inverter becomes a high-frequency AC, which is stepped down by a high-frequency transformer and rectified by a rectifier, and the filtered output is suitable for welding of direct current. The circuit design of the control realizes the closed-loop control of the whole machine, so that the welding power source has a good ability to resist power grid fluctuations. It is composed of the following parts: main circuit, program control circuit controlled by single-chip microcomputer 89C51, ZVZCS soft switch full bridge phase shift control circuit composed of special soft switch phase shift chip UCC3895, drive and protection circuit, etc., system block diagram like figure 1 .

[0033] 1. The main circuit includes:

[0034] (1) Input protection and rectification filter ...

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Abstract

The invention relates to a digital soft switch inverter arc welding machine which is controlled by an embedded system. The digital soft switch inverter arc welding machine mainly solves the technical problems of the deficiencies on the control performances and the dynamic response aspect of the traditional welding machine, difficult realization of the real-time control of the welding arc and the improvement of the reliability of an inverter welding machine and so on. A main circuit is controlled by a control circuit to realize the arc welding, the pulse width modulation adopts a soft switch phase-shifting circuit; a pulse drive and protection circuit adopts a drive two magnetic tank type pulse transformer, a capacitor, a twisted-pair line, a TVS tube and a resistor are simultaneously added for continuous protection, thus preventing over-voltage and misconduction of IGBT which is caused by the over-voltage. The digital soft switch inverter arc welding machine is mainly used for various welding.

Description

technical field [0001] The invention relates to a digital soft switch inverter arc welding machine controlled by an embedded system. Background technique [0002] So far, DC welding machines have gone through four stages of development, namely rotary DC arc welding machines, silicon rectifier arc welding machines, thyristor (silicon controlled silicon) DC welding machines and IGBT (insulated gate bipolar transistor) inverter welding machines. , and its advancedness increases successively. Among them, the IGBT inverter welding machine is the main type at this stage. Compared with the thyristor welding machine, its main advantages are: small size, light weight, easy to store and easy to move; fast dynamic response, arc welding Stable, good weld formation; good control performance, easy to realize timely control of the welding process and form an automatic welding system; allow a wide range of grid voltage fluctuations, the main working principle of the IGBT inverter welding ma...

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Application Information

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IPC IPC(8): B23K9/10
Inventor 谢越群浣喜明赵振兴徐森林陈军根赵葵银扬青
Owner 湖南超宇科技有限公司
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