Research And Design Of High-Power Switching Power Supply For Ozone Generator

This paper studies the ozone generator power supply with interleaved Boost PFC with coupled inductor as a pre stage topology,the phase shifted full bridge converter as the inverter topology,the DSP as the core control chip.The design and manufacturing process of the 1kW/25 kHz prototype are introduced.The characteristics of interleaved Boost PFC with coupled inductance and the traditional Boost PFC converter are compared in this paper,and draw a conclusion that interleaved Boost PFC converter has lower current ripple and lower loss.The ability of balancing the current automatically in the situation of unbalanced duty cycle is verified with the Matlab.This paper studies the characteristics of chip UCC28070 and design compensation circuit and control Circuit based on UCC28070.The high frequency and high voltage inverter circuits adopt hard switching mode,which not only can withstand high current stress and voltage stress,but also has a great loss in the process of turning on and off.In the high frequency inverter part,this design use phase shifted full bridge soft switching technology.Working process of the series resonance circuit is analyzed in detail and a series of important parameters of inverter circuits are obtained considering characteristics of dielectric barrier discharge ozone generator.Inverter control circuit is based on DSP type TMS320F28027 chip and meets the requirements of system control in real time and flexibility.The whole design of the high power high frequency ozone switching power supply having high power factor and high efficiency is verified in the experiment.Problems and possible reasons in the experiment areanalyzed.The test results show that the design of the prototype meets the design requirements.