Разработка источника питания управляющего электрода технологической электронной пушки

Abstract

The article deals with developing the model of a power supply voltage modulator for the electron-beam gun control electrode within the framework of the project aimed at elaborating scientific and technical fundamentals of controlling the electron beam additive form shaping process. Generally, this technology involves the use of high-power electron beams for sequentially fusing materials in the form of a metal wire. The electron beam electric current is controlled by applying the beam impulse on the fused metal wire. Despite the fact that active efforts are being taken by Russian and foreign companies for developing the technology, clear criteria for choosing the electron beam pulsed modulation parameters have not been determined and depend on the material being processed. The current technical solutions used for energizing the gun’s electron beam and controlling its power are briefly described. The electron beam current pulse modulation system is analyzed with a view to determine the electric voltage modulator optimum parameters and operating modes. A modulator model has been developed and proposed, using which it is possible to evaluate the impulse voltage parameters, to estimate the transients at the front and trailing edges of the modulator output voltage pulses with different duty cycles, and to select the proper components. The electrical circuit of the power supply voltage modulator for the electron-beam gun control electrode was simulated using the NI Multisim 11.0 simulation package.