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Control method of electron-beam welder acceleration high-voltage power supply as well as power-supply apparatus

A high-voltage power supply, electron beam welding technology, applied in electron beam welding equipment, manufacturing tools, welding equipment and other directions, can solve the problems of low efficiency, difficult manufacturing technology of high-frequency inverter and high-frequency high-voltage transformer, etc. Easy and small output voltage ripple factor

Active Publication Date: 2008-12-17
GUILIN THD TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manufacturing technology of high-frequency inverters and high-frequency high-voltage transformers is difficult and the efficiency is low

Method used

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  • Control method of electron-beam welder acceleration high-voltage power supply as well as power-supply apparatus
  • Control method of electron-beam welder acceleration high-voltage power supply as well as power-supply apparatus
  • Control method of electron-beam welder acceleration high-voltage power supply as well as power-supply apparatus

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The electron beam welding machine of the present embodiment accelerates the high-voltage power supply device, such as figure 1 As shown, it mainly consists of grid filter 1, input rectification filter circuit unit 2, inverter 3, intermediate frequency high voltage transformer 4, high voltage rectification filter circuit unit 5, high voltage discharge choke circuit unit 6, high voltage sampling circuit unit 7, electron beam Flow sampling resistor 8, fault discrimination circuit unit 9, high voltage setting signal generator 10, high voltage regulator 11, inverter drive circuit unit 12, inverter 3 input current detection circuit unit 13.

[0026] The input end of the grid filter 1 is connected to the three-phase 380V grid, and its output is sent to the AC input side of the rectifier bridge in the input rectifier filter circuit unit 2 . The power grid filter 1 is used to cut off the transmission path of electromagnetic interference (EMI).

[0027] The straight direct curre...

Embodiment 2

[0045] The electron beam welding machine of the present embodiment accelerates the high-voltage power supply device, such as Figure 4 As shown, the difference from Embodiment 1 is that the two high-voltage rectifier bridges of the high-voltage rectification and filtering circuit unit 5 are output in parallel (the embodiment 1 is a series output), while other parts are identical.

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Abstract

The invention discloses a control method and power supply device for an electron-beam welding machine to accelerate high-voltage power supply, which uses three-phrase commercial power and adopts the current transformation mode of AC-DC-AC-DC; wherein, the inversion link DC-AC in the middle is medium-frequency inversion; the function of high frequency pulse width modulation and voltage regulation is realized in the inversion process; the transmission of the electrical energy, the transformation of the voltage value and high voltage insulation are realized by a medium frequency high voltage transformer; by using a high voltage sampling signal as an inverse feedback signal to control the duty cycle of the high frequency pulse width modulation output wave, the automatic stable regulation of the output high voltage is realized. Therefore, the device is characterized by little harmonic interference in the power network, quick system regulation, small output high voltage ripple, simple manufacturing and higher efficiency.

Description

(1) Technical field [0001] The invention relates to electron beam welding equipment, in particular to a control method for accelerating a high-voltage power supply of an electron beam welder and a power supply device. (2) Background technology [0002] Electron beam welding uses spatially oriented high-speed moving electron beams, and after hitting the surface of the workpiece, the kinetic energy is converted into heat energy, which melts the metal to be welded, and forms a weld after cooling and crystallization. Compared with conventional welding methods, electron beam welding has the advantages of high heating power density, large weld depth-to-width ratio, fast welding speed, small heat-affected zone, small welding deformation, high weld purity, wide adjustment range of welding process parameters, and adaptability Strong and many weldable materials and so on. The electron beam welding machine is a high-tech product that integrates various technologies such as vacuum phys...

Claims

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Application Information

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IPC IPC(8): B23K15/02H02M5/44
Inventor 韦寿祺莫远林费翔陆思恒黄小东郭华艳罗达祺
Owner GUILIN THD TECH CO LTD
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