大功率臭氧發(fā)生器開關(guān)電源的研制
[Abstract]:In this paper, the high frequency inverter power supply of ozone generator is studied, which uses the coupling inductance staggered parallel connection as the main topology of the front stage, the phase-shifted full-bridge converter as the main topology of the back-stage inverter, and the DSP as the core control chip. The design and manufacture process of 1kW/25kHz power supply prototype are also introduced. In the former power factor correction part of the design, the coupling inductor staggered parallel Boost PFC circuit is used to compare with the traditional Boost PFC circuit, and the working state and circuit characteristics of the main circuit are analyzed. It is found that the coupled interleaving parallel PFC circuit has the characteristics of low ripple and low loss. It is analyzed and verified by Matlab that the circuit has good automatic current-sharing capability when the duty cycle is not balanced. The characteristics of UCC28070 control chip are studied, the dynamic characteristics of compensation network are designed and verified, and the control circuit based on the chip is designed. The high frequency and high voltage inverter circuit adopts the hard switch mode, not only the power switch device bears the high current stress and the voltage stress instantly, but also its turn-on and turn-off process loss is very big. The phase-shifting full-bridge soft-switch technology is used in the back stage high-frequency inverter. According to the characteristics of dielectric barrier ozone generator, the working conditions of series resonant circuit are analyzed and deduced in detail, and a series of important parameters of inverter circuit are obtained. Circuit components and circuit control parameters are designed based on these parameters. The inverter part control circuit is based on TMS320F28027 type DSP chip. The software design based on DSP is introduced in detail, which meets the requirements of real-time and flexibility of system control. Finally, the experimental results of the whole switching power supply show that the topology has high power factor and high efficiency in the application of high-power high-frequency ozone switching power supply. The problems and possible reasons in the experiment are analyzed. The experimental results show that the prototype meets the design requirements.
【學(xué)位授予單位】:上海電機(jī)學(xué)院
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TN86
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