本文選題：單片機(jī) + PWM調(diào)制�。� 參考：《南京信息工程大學(xué)》2012年碩士論文

【摘要】：高壓直流電源在生產(chǎn)生活中有廣泛的應(yīng)用,許多高新技術(shù)的發(fā)展,都離不開高壓電源作為技術(shù)支撐。傳統(tǒng)的高壓直流電源控制方式比較簡(jiǎn)單,更多的依賴于模擬電子技術(shù)發(fā)展,與數(shù)字電子技術(shù)相比,傳統(tǒng)的模擬電子技術(shù)存在著抗干擾能力不強(qiáng)、效率不高等劣勢(shì)。隨著微處理器的出現(xiàn)和發(fā)展,電力電子變換器的控制技術(shù)從傳統(tǒng)的模擬控制轉(zhuǎn)向數(shù)字控制已經(jīng)成為一個(gè)趨勢(shì)。數(shù)字控制技術(shù)可使控制電路大為簡(jiǎn)化,并能提高系統(tǒng)的抗干擾能力、控制靈活性以及智能化程度。 設(shè)計(jì)了用于電磁脈沖模擬器的高壓電源,該電源主要由整流濾波初步穩(wěn)壓部分、單片機(jī)調(diào)壓控制部分、直流斬波電路、低通濾波電路、逆變器、高頻變壓器、倍壓整流電路和反饋電路組成。將工頻交流電通過降壓、整流、濾波、穩(wěn)壓等環(huán)節(jié)得到低壓直流電,將此直流電輸入到直流斬波電路�？刂齐娐凡捎肧TC89C52單片機(jī)經(jīng)過軟件編程生成PWM波,作為斬波電路的控制信號(hào)。斬波電路之后接入低通濾波電路,得到大小可調(diào)的直流電。設(shè)計(jì)用BTS器件實(shí)現(xiàn)斬波功能。另一方面,STC89C52通過反饋電壓與所需基準(zhǔn)電壓比較,調(diào)制PWM波,即改變占空比,實(shí)現(xiàn)高性能可調(diào)直流穩(wěn)壓。 可調(diào)直流電壓輸入逆變電路,通過設(shè)計(jì)的全橋逆變電路得到高頻交流方波,此高頻交流電壓作為高頻變壓器的輸入端電壓。對(duì)高頻變壓器研制要求進(jìn)行了具體的分析,并設(shè)計(jì)出一個(gè)穩(wěn)定可靠的高頻變壓器。高頻變壓器輸出端接入到倍壓整流電路,從而得到所需的高壓直流電。 對(duì)選定的主電路拓?fù)浣Y(jié)構(gòu)進(jìn)行設(shè)計(jì),給出主電路中各參量的設(shè)計(jì),包括輸入整流濾波電路的參數(shù)設(shè)計(jì)、逆變器、高頻變壓器以及倍壓整流電路的參數(shù)設(shè)計(jì)。對(duì)控制部分做了詳細(xì)的闡述。對(duì)整個(gè)電源系統(tǒng)完成了軟件、硬件的設(shè)計(jì)。對(duì)整個(gè)電源系統(tǒng)進(jìn)行了大量的仿真分析和部分試驗(yàn)對(duì)比,給出了仿真結(jié)果和試驗(yàn)波形,結(jié)果驗(yàn)證了理論分析與設(shè)計(jì)的正確性。
[Abstract]:HVDC power supply is widely used in production and life, and the development of many high technology can not be separated from HV power supply as technical support.The traditional control mode of HVDC power supply is relatively simple and more dependent on the development of analog electronic technology. Compared with digital electronic technology, the traditional analog electronic technology has some disadvantages such as weak anti-interference ability and low efficiency.With the appearance and development of microprocessor, the control technology of power electronic converter has become a trend from traditional analog control to digital control.Digital control technology can simplify the control circuit greatly, and can improve the anti-interference ability, control flexibility and intelligent degree of the system.The high voltage power supply for electromagnetic pulse simulator is designed. The power supply is mainly composed of rectifier filter, voltage regulation control part, DC chopper circuit, low pass filter circuit, inverter, high frequency transformer, etc.Voltage-doubling rectifier circuit and feedback circuit composition.Low voltage DC is obtained by power frequency alternating current through step-down, rectifier, filter and voltage stabilizer, and the DC is input to DC chopping circuit.The control circuit uses STC89C52 singlechip to generate PWM wave by software programming, which is used as the control signal of chopper circuit.The chopper circuit is then connected to the low-pass filter circuit and the adjustable DC is obtained.The chopping function is realized with BTS device.On the other hand, STC89C52 modulates the PWM wave by comparing the feedback voltage with the required reference voltage, that is, changing the duty cycle to achieve high performance adjustable DC voltage stabilization.The variable DC voltage input inverter is used to obtain the high frequency AC square wave, which is used as the input voltage of the high frequency transformer.The development requirements of high frequency transformer are analyzed, and a stable and reliable high frequency transformer is designed.High-frequency transformer output is connected to voltage-doubling rectifier circuit to obtain the required high-voltage DC.The topology of the selected main circuit is designed. The parameters of the main circuit are designed, including the input rectifier and filter circuit, the inverter, the high-frequency transformer and the voltage doubling rectifier circuit.The control part is described in detail.The software and hardware are designed for the whole power supply system.A great deal of simulation analysis and some experiments are carried out on the whole power supply system. The simulation results and the experimental waveforms are given. The results verify the correctness of the theoretical analysis and design.
【學(xué)位授予單位】：南京信息工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP368.1;TN86

【引證文獻(xiàn)】

中國碩士學(xué)位論文全文數(shù)據(jù)庫 前1條

1 陳玉龍;基于DSP的高壓直流電源的設(shè)計(jì)[D];大連理工大學(xué);2013年

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本文編號(hào)：1745699