本文選題：數(shù)字化逆變弧焊電源　切入點：軟開關　出處：《青島大學》2017年碩士論文　論文類型：學位論文

【摘要】：逆變弧焊電源廣泛應用在生產(chǎn)實踐以及日常生活中,市面上的逆變弧焊電源采用模擬控制與硬開關電路實現(xiàn),具有效率低、可靠性較差、控制靈活性較差等缺點。針對市面上逆變弧焊電源以上的缺點,本文將從電源的數(shù)字控制與軟開關方面進行研究,設計與實現(xiàn),它將對提高焊接工藝與技術、節(jié)能環(huán)保,具有現(xiàn)實意義。在移相全橋電路拓撲基礎上,本文采用并分析了一種改進的全橋軟開關電路拓撲,即通過將飽和電感與阻斷電容相串聯(lián),來實現(xiàn)超前橋臂的零電壓開通與關斷和滯后橋臂的零電流開通與關斷。結(jié)合ZVZCS實現(xiàn)條件進行了主電路設計,對關鍵元器件進行計算,實現(xiàn)軟開關,減小了電路的開通與關斷損耗,減小了回路中的環(huán)流,提高了電源的工作性能。對該拓撲電路進行仿真實驗,驗證了本設計的可行性與正確性。本設計控制部分采用了基于電壓模糊PI自校正控制系統(tǒng),制訂了詳細的模糊規(guī)則,有效地調(diào)節(jié)逆變弧焊電源電壓,并且采用帶電流峰值限制的P控制器作為電流內(nèi)環(huán),限制變換器主元件電流,對該控制系統(tǒng)進行了仿真研究,和傳統(tǒng)弧焊電源雙閉環(huán)系統(tǒng)進行了比較,證明了該控制系統(tǒng)的優(yōu)越性。在控制系統(tǒng)設計方面,采用DSP芯片TMS320F28335使系統(tǒng)控制靈活性得到顯著地提高。設計了電壓電流采樣電路、驅(qū)動電路、保護電路等硬件電路,對電路的工作原理與過程進行了分析;闡述了系統(tǒng)的軟件設計思想,編寫了對應的控制程序流程圖。
[Abstract]:Inverter arc welding power source is widely used in production practice and daily life. The inverter arc welding power source in the market is realized by analog control and hard switch circuit, which has low efficiency and poor reliability. In view of the shortcomings above the inverter arc welding power source on the market, this paper will study, design and implement the digital control and soft switch of the power supply, which will improve the welding process and technology, and save energy and environmental protection. On the basis of the phase-shifted full-bridge circuit topology, an improved full-bridge soft-switching circuit topology is adopted and analyzed in this paper, that is, the saturated inductance is connected with the blocking capacitance in series. To realize the zero voltage turn-on and turn-off of the lead-bridge arm and the zero-current turn-on and turn-off of the lagged arm. The main circuit design is carried out in combination with the ZVZCS realization condition, and the key components are calculated to realize the soft switch. The circuit opening and turn-off losses are reduced, the circulation in the circuit is reduced, and the working performance of the power supply is improved. The simulation experiment of the topology circuit is carried out. The feasibility and correctness of the design are verified. The control part of the design adopts the voltage fuzzy Pi self-tuning control system, and formulates the detailed fuzzy rules, which effectively adjusts the voltage of the inverter arc welding power source. A P controller with peak current limitation is used as the inner current loop to limit the current of the main component of the converter. The control system is simulated and compared with the traditional double closed loop system of arc welding power supply. The advantages of the control system are proved. In the design of the control system, the control flexibility of the system is improved significantly by using DSP chip TMS320F28335. The hardware circuits such as voltage and current sampling circuit, driving circuit and protection circuit are designed. The working principle and process of the circuit are analyzed, the software design idea of the system is expounded, and the corresponding control program flow chart is compiled.
【學位授予單位】：青島大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG434.1

【參考文獻】

相關期刊論文 前10條

1 鄧利紅;;先進數(shù)字控制技術在DC-DC變換器中的應用[J];電腦知識與技術;2016年36期

2 王永崗;;幾種常用嵌入式技術應用特點的比較[J];電腦開發(fā)與應用;2011年12期

3 劉修泉;曾昭瑞;黃平;;高頻變壓器的設計與實驗研究[J];變壓器;2009年03期

4 秦嶺;張航;王亞芳;謝少軍;;基于新型箝位電路的低電壓應力零電流開關半橋PWM變換器[J];中國電機工程學報;2008年24期

5 黃石生;何寬芳;孫德一;李鵬;;數(shù)字化控制的埋弧自動焊裝備的研制[J];華南理工大學學報(自然科學版);2008年08期

6 黃小安;艾劍良;羅昌行;;PID神經(jīng)網(wǎng)絡控制器在飛控系統(tǒng)中的應用[J];航空計算技術;2008年02期

7 高忠林;胡繩蓀;殷鳳良;;弧焊電源電壓電流的自適應神經(jīng)網(wǎng)絡控制[J];電力電子技術;2007年11期

8 杜貴平;張波;陳立軍;;ZVS移相全橋變換器開關管等損耗控制策略[J];電工技術學報;2007年01期

9 何亮;方宇;李吉;邢巖;;峰值電流控制DC/DC變換器的恒值限流方法[J];電工技術學報;2006年10期

10 陳新;Charlie WU;WHut chings;;基于DSC控制的移相全橋DC/DC變換器[J];電力電子技術;2006年05期

相關碩士學位論文 前2條

1 張志龍;軟開關技術在數(shù)字化弧焊逆變電源中的應用研究[D];哈爾濱工程大學;2011年

2 李從洋;逆變弧焊電源自適應模糊控制技術研究[D];青島大學;2010年

，

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