Research On Low Voltage Electron Beam Welder Power Supply And Its Realization

With the increasing of space exploration activities all over the world, the spacecraft needs larger size and longer life requirements, which require us to carry out large-scale assembly, maintenance and maintenance of spacecraft in space, so the space welding has been more and more focused,and the electron beam welding is very suitable for the space environment, and it has long been proved to be feasible, as the core of the electron beam welder, electron beam welding power supply equipment design and manufacturing has also been focused by a lot of scholars and engineering staffs. This paper firstly summarized the background of space welding, summarizes the development of space electron beam welding at home and abroad, and introduced the current research progress of space electron beam machine equipment,and focuses on the development of electronic beam welder The development of the status quo were summarized, and in accordance with the space electron beam welder power supply technical requirements, the design of a power principle prototype.In this paper,the research on the power supply of space low voltage electron beam welding machine includes the following aspects:1. The overall design of the space electron beam welder power system: the overall design of the power supply system of the electron beam welder, the hardware scheme and the design of the software scheme.2. Space electron beam welder power system main circuit design: mainly to write electron beam welder welding machine hardware system design, the main circuit topology using LLC resonant transformation of the way, respectively, high-voltage power supply,filament power, and focus power The design.3. Space electron beam welding machine power system control system design: from the hardware and software on the two aspects of the power control system to do a detailed design,the use of DSP chip as the control core, the control part of the hardware drive circuit,sampling circuit, As well as the protection circuit to do the design,and in accordance with the design of the software flow chart control part of the software design.4. Electromagnetic compatibility design of power supply: According to the three elements of electromagnetic interference interference, coupling path, and sensitive equipment,the specific analysis of the design of the power supply of electromagnetic interference causes,and these reasons were resolved,including anti-jamming hardware design As well as software design.5. Power system joint test: According to the above design to build the actual principle of the prototype power supply, the main circuit, control circuit, protection circuit, sampling circuit, such as the physical structures. And through the joint test, collected the test data and waveform, basically meet the design requirements.