Extremely high electron beam current regulation and control power supply system, electron beam welding machine and electronic equipment

By introducing a transistor assembly and a beam sampling resistor into the high-voltage electron beam welder, the problems of inaccurate beam current and difficulty in control were solved, enabling real-time response and precise control of the beam current, and improving the stability and reproducibility of the beam current.

CN120839233APending Publication Date: 2025-10-28INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Patent Information

Application Number
CN202511068512.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-31
Publication Date
2025-10-28

AI Technical Summary

Technical Problem

Existing high-voltage electron beam welding machines suffer from inaccurate beam current, difficulty in control, and poor beam current stability and reproducibility, which makes them unsuitable for precision welding.

Method used

The system employs an extremely high electron beam current control power supply. By introducing a transistor assembly between the negative terminal of the high-voltage power supply and the bias power supply, and using the beam current sampling resistor in the beam circuit to control the on-state voltage drop of the transistor, the voltage of the bias cup can be adjusted in real time. This avoids the influence of leakage current from the high-voltage cable and enables precise sampling and rapid adjustment of the beam current.

Benefits of technology

It achieves real-time response and rapid adjustment of the working beam current, ensuring precise beam current control, avoiding the influence of leakage current on beam current sampling, and improving beam current stability and reproducibility.

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Abstract

The invention discloses an extremely high electron beam regulation and control power supply system, an electron beam welding machine and electronic equipment. The power supply system comprises a high-voltage power supply, a bias power supply, a filament power supply, resistors Rs, R1-R3 and a triode assembly Q1. The negative electrode of the high-voltage power supply is connected with one end of the resistor R3, the other end of the resistor R3 is connected with one end of the resistor Rs, and the other end of the resistor Rs is connected with the negative electrode of the bias power supply and the emitting electrode of the triode assembly Q1; the positive electrode of the bias power supply is connected with the resistors R1 and R2; the anode of the filament power supply is connected with the other end of the resistor R1, and the cathode of the filament power supply is connected with the resistor R2; the triode assembly is connected to the output end of the bias power supply in parallel, the conduction voltage of the triode assembly is linearly controlled through the size of the working beam in the high-voltage loop so as to adjust the voltage of the bias cup, real-time response and rapid adjustment of the working beam are achieved, and the size of the working beam of the high-voltage electron beam welding machine can be accurately controlled.
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