Study On Pulse Generator For Low-Speed WEDM

The low-speed WEDM pulse power supply is an important of the low-speed machine tools, and has a direct impact on machine tool technology index. I designed a digital pulse power supply of DSP-based after I do a lot of the existing record by the pulse power supply to carry out a study for low-speed cha-racteristics of the machine tool. Studyes of this thesis as follow:Firstly, this thesis introduced the current domestic and foreign WEDM's the situation of the development and trends,and Learn characteristics of the traditional pulse power supply. then expound the mechanism principle ,So that we have a preliminary understanding of it. In this section,we focus on energy analysisand described the impact of the electric parameters.Secondly, this thesis brings forward the digital pulse power supply's hardwaredesign and software implementation based on TMS320F2812 controller and gives the schematic of hardware and software flow chart The use of powerful data-processing capability and a wealth of resources both within and outside and high-speed real-time control capability, The realization of the sampling data, adjust and control of PWM,communications and so on. Adoption of this chip makes the excitation controller has simpler structure, stronger anti-jamming capability and higher stability.Finally,we designed two PI controller according to the actual situation in the thesis,but this part is the small piece because this is not to go in-depth study so the control parameters are still experimental stage.Through the simulation, the better to determine value of several important components on the main circuit. At the same time, simulation shows that the main circuit current is stability, and achieve the purpose of design.