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Digital high-frequency and high-voltage power supply device of electron beam welding machine and control method thereof

A high-frequency high-voltage power supply and electron beam welding technology, which is applied to electron beam welding equipment, output power conversion devices, electrical components, etc. The effect of reducing quality and physical examination, small output voltage ripple, and fast fault protection

Inactive Publication Date: 2012-06-20
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is characterized by fast system adjustment speed, high adjustment accuracy, small equipment size, and low manufacturing cost, but it is difficult to manufacture high-frequency inverters and high-frequency high-voltage transformers

Method used

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  • Digital high-frequency and high-voltage power supply device of electron beam welding machine and control method thereof
  • Digital high-frequency and high-voltage power supply device of electron beam welding machine and control method thereof
  • Digital high-frequency and high-voltage power supply device of electron beam welding machine and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The digitized high-frequency high-voltage power supply device of the electron beam welding machine of the present embodiment, such as figure 1 As shown, it is mainly composed of grid filter 1, input rectification filter unit 2, high-frequency chopper voltage regulation unit 3, high-frequency inverter unit 4, high-frequency high-voltage transformer 5, high-frequency rectification filter unit 6, high-voltage discharge choke unit 7. High-voltage sampling unit 8, electron beam current sampling resistor 9, signal processing and fault synthesis unit 10, digital controller 11, drive circuit unit 12, and human-computer interaction unit 13.

[0028] The input terminal 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 unit 2 . The power grid filter 1 is used to cut off the transmission path of electromagnetic interference (EMI).

[0029] The straight direct current out...

Embodiment 2

[0047] The digitized high-frequency high-voltage power supply device of the electron beam welding machine of the present embodiment, such as image 3 As shown, the difference from Embodiment 1 is that the four high-voltage rectifier bridges of the high-frequency rectification and filtering unit 6 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 method and a device for controlling a digital high-frequency and high-voltage power supply of an electron beam welding machine, wherein three-phase commercial power is used for power supply, and an AC (alternating current) to DC (direct current) to DC to AC to DC current change way is adopted, intermediate DC to DC is of a high-frequency chopping direct-current voltage regulation link, and DC to AC is of a high-frequency inversion link; a high-frequency and high-voltage transformer is used for realizing energy transfer, voltage boosting and high-voltage insulation; a negative feedback control way is adopted by the high-voltage power supply, a digital proportional-integral (PI) regulator mechanism is adopted, regulation is completed in a digital controller, and a PWM (pulse width modulation) pulse signal of pulse width change is generated to control the high-frequency chopping voltage regulation unit so as to complete closed-loop control of the high-voltage power supply and realize automatic stable regulation of output high voltage. The method and the device disclosed by the invention have the characteristics of small harmonic interference on a power grid, output high voltage ripple, high precision, high efficiency and all-digital property.

Description

technical field [0001] The invention relates to electron beam welding equipment and a control device thereof, in particular to a digital high-frequency high-voltage power supply method device for an electron beam welding machine and a control method thereof. Background technique [0002] Electron beam welding is a welding process that uses electron beams as a heat source; when the cathode filament in the electron gun is heated to a certain temperature, electrons will escape, and the electrons will be accelerated under the action of a high-voltage electric field, and the energy density will be formed after focusing through the electromagnetic lens. Extremely high electron beam, when the electron beam bombards the welding surface, the strong kinetic energy of the electrons is instantly converted into heat energy, which melts the metal and achieves the purpose of welding. Compared with common welding methods, electron beam welding has the characteristics of high power density, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M1/32B23K15/00
Inventor 樊生文王泽庭李正熙
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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