Development Of High Frequency And High Pressure Dust Removal Power Supply

With the rising levels and growing scale of industry in China, industrial fumesseriously affect the ecological environment and human health and we should disposeindustrial fumes by electrostatic precipitator (ESP) which is one of the most important waysin existing methods of dusting. Due to the disadvantages of industrial frequency powersupply of ESP, it’s difficult to meet the new situation of dust emission standard. Therefore,the high-frequency power supply of ESP was born. The high-frequency power supply of ESPhas the advantages of small volume, low power loss and high efficiency of dusting, whichmakes it get extensive attention and research. The main contents of this paper are followed:Firstly, we choose the LCC resonant converter as the inverter link of power supplysystem by analysis and comparison of different resonant converter. This paper takes fulladvantage of leakage inductance and distributed capacitance of high-frequency transformeras a part of the LCC resonant converter and gives the LCC resonant converter topology. Andthe paper presents a detailed analysis of the working principles of the two different modeswhich are resonant discontinuous current and selects the appropriate working mode for thissystem based on the characteristics of the system itself. Using mathematical deduction, thispaper deduces the LCC resonant converter, analyzes its relevant features and selects relatedparameters of resonant converter. Then this paper gives relevant waveforms based onsimulation actual power system and verifies the validity of the selected parameters.Secondly, this paper analyzes and designs the main circuit and control circuit of powersupply system. The paper analyzes the selection of the models and specific parametercalculation of every model in the main circuit which includes the following: rectifier circuit,inverter circuit and high-frequency high-voltage rectifier transformer. Then we analyze eachmodule and choose the relevant chips according to the system characteristics. At the sametime, we give the interpretation of the circuit combined with the corresponding circuitschematic in the control circuit which includes DSP main circuit, drive circuit, analog circuitand digital circuit.Thirdly, this paper presents the software design of power system. The software of thispower system is designed based on DSP of TMS320F2812and CCS software platform. Itincludes the main program flow, the generation of PWM wave, analog acquisition,over-current protection, spark control and partial excitation detection. And then this paper introduces the generation of PWM, analog acquisition, over-current protection and thecorresponding program flow in detail after the main program flow. Furthermore, this paperillustrates the spark control and partial excitation detection and gives their own flow charts.Finally, we present the feasibility of the development of power system by testing it inthe real electric field which includes drive circuit test, resistance-capacitive load and theload of pure resistance test. Then we also give the relevant experimental waveform andillustration of the waveform. The experimental results show that the development ofhigh-frequency high-voltage power supply system is stable and reliable which reaches therequirements of the design and lays the foundation for further engineering application.