Design of pulse power supply and control system based on FPGA

To meet the application demand of the field of plasma, a pulse power supply with the functions of manual and automatic and PC controls is developed. The Field Programmable Gate Array (FPGA) is used as the main control chip to generate digital pulse width modulation (DPWM) and relay control signals which are amplified by drive circuit and then drive the full-bridge inverter circuit and the relay. On sampling the real-time temperature and electric current through the temperature sensor DS18B20 and the Hall sensor QBC10PS5, over temperature and short protection circuits are designed. The main circuit, detection circuit, drive circuit, DPWM generation module and the design of pulse transformer are introduced in detail in this paper. Finally, the results of the experiments verify that the pulse power supply meets the technical requirements.