本文選題：電阻焊機(jī) + 全橋逆變　； 參考：《山東大學(xué)》2017年碩士論文

【摘要】：隨著人們對(duì)電阻焊機(jī)焊接控制精度和焊接質(zhì)量的要求不斷提高,以及計(jì)算機(jī)控制技術(shù)和大功率開關(guān)器件IGBT等電力電子器件的不斷應(yīng)用及發(fā)展,數(shù)字化逆變電阻焊機(jī)依靠其三相負(fù)載平衡、動(dòng)態(tài)響應(yīng)快、焊接質(zhì)量高、易于控制、輸出效率高等優(yōu)點(diǎn),受到國(guó)內(nèi)外的廣泛關(guān)注。本文對(duì)數(shù)字化逆變電阻焊機(jī)的工作過(guò)程、控制方式等進(jìn)行深入分析,研究并設(shè)計(jì)出新型數(shù)字化逆變電阻焊機(jī)樣機(jī)。首先,本文對(duì)數(shù)字化逆變電阻焊機(jī)工作原理、影響焊接因素進(jìn)行分析,并對(duì)所設(shè)計(jì)樣機(jī)主電路的拓?fù)浣Y(jié)構(gòu)和焊接工作模式進(jìn)行詳細(xì)的介紹。通過(guò)Matlab中Simulink工具箱建立拓?fù)浣Y(jié)構(gòu)模型,對(duì)數(shù)字化逆變電阻焊機(jī)的恒電壓、恒電流和恒功率三種焊接模式進(jìn)行仿真分析。其次,對(duì)所設(shè)計(jì)樣機(jī)主電路工作過(guò)程和硬件設(shè)計(jì)過(guò)程、控制電路的信號(hào)檢測(cè)和焊接控制過(guò)程進(jìn)行介紹。數(shù)字化逆變電阻焊機(jī)完成能量傳輸過(guò)程的主電路,主要包括抗干擾及輸入電壓保護(hù)、三相輸入整流濾波、浪涌電流抑制、全橋逆變(H橋)、IGBT緩沖保護(hù)、變壓器電壓電流變換以及次級(jí)整流電路等。文章詳細(xì)分析了主電路中各部分電路的工作原理和工作過(guò)程,并通過(guò)對(duì)各部分功率電路中的電流、電壓參數(shù)的計(jì)算,選擇出參數(shù)合適的功率器件型號(hào)以及選擇最佳的IGBT緩沖保護(hù)電路。作為數(shù)字化逆變電阻焊機(jī)的核心,控制電路主要實(shí)現(xiàn)對(duì)焊機(jī)整個(gè)工作系統(tǒng)的控制和電流電壓信號(hào)檢測(cè)。本文對(duì)控制系統(tǒng)各部分電路的功能進(jìn)行詳細(xì)介紹,根據(jù)其功能模塊完成相應(yīng)的電路設(shè)計(jì),包括單片機(jī)最小系統(tǒng)及外圍電路設(shè)計(jì)、人機(jī)交互界面設(shè)計(jì)、整流輸出電流和焊接電流的檢測(cè)電路設(shè)計(jì)、過(guò)電流故障保護(hù)電路設(shè)計(jì)、PWM信號(hào)互鎖電路以及IGBT驅(qū)動(dòng)電路設(shè)計(jì)等,并根據(jù)數(shù)字化逆變電阻焊機(jī)的恒電壓、恒電流和恒功率三種工作模式的分析完成軟件實(shí)現(xiàn)流程圖的設(shè)計(jì)。最后,本文對(duì)所設(shè)計(jì)樣機(jī)各部分功能電路分別測(cè)試,根據(jù)測(cè)試結(jié)果和輸出波形做相應(yīng)調(diào)試。并對(duì)測(cè)試過(guò)程中出現(xiàn)的問(wèn)題進(jìn)行分析,做出相關(guān)的電路改進(jìn)和算法的改善,然后對(duì)所設(shè)計(jì)樣機(jī)組裝并進(jìn)行穩(wěn)定性和可靠性測(cè)試,實(shí)驗(yàn)結(jié)果基本符合系統(tǒng)設(shè)計(jì)要求。本文最后對(duì)文章內(nèi)容總結(jié),并在此基礎(chǔ)上提出論文的不足之處和改進(jìn)措施。
[Abstract]:With the increasing requirement of welding control precision and welding quality of resistance welding machine, and the application and development of power electronic devices such as computer control technology and IGBT, etc. Digital inverter resistance welding machine is widely concerned at home and abroad for its advantages of three-phase load balance, fast dynamic response, high welding quality, easy control and high output efficiency. In this paper, the working process and control mode of the digital inverter resistance welding machine are deeply analyzed, and the prototype of the new digital inverter resistance welding machine is studied and designed. Firstly, this paper analyzes the working principle of the digital inverter resistance welding machine and the factors affecting the welding, and introduces the topology structure and welding working mode of the main circuit of the designed prototype in detail. The topology model of digital inverter resistance welding machine is established by Simulink toolbox in Matlab. Three welding modes, constant voltage, constant current and constant power, are simulated and analyzed. Secondly, the main circuit working process and hardware design process of the prototype, the signal detection and welding control process of the control circuit are introduced. The main circuit of digital inverter resistance welding machine to complete the process of energy transmission mainly includes anti-interference and input voltage protection, three-phase input rectifier filter, surge current suppression, full-bridge inverter (H-bridge) IGBT buffer protection. Transformer voltage and current conversion and secondary rectifier circuit. The working principle and working process of each part of the main circuit are analyzed in detail, and the parameters of current and voltage in each part of power circuit are calculated. Select the appropriate parameters of the power device model and select the best IGBT buffer protection circuit. As the core of the digital inverter resistance welding machine, the control circuit mainly realizes the control of the whole working system of the welding machine and the detection of the current and voltage signals. In this paper, the functions of each part of the control system are introduced in detail. According to its function module, the corresponding circuit design is completed, including the design of the minimum system and peripheral circuit of the single chip microcomputer, the design of the man-machine interface. The detection circuit of rectifier output current and welding current, over-current fault protection circuit, PWM signal interlocking circuit and IGBT drive circuit are designed, and according to the constant voltage of digital inverter resistance welder, The analysis of three working modes of constant current and constant power completes the design of software flow chart. Finally, the functional circuits of the prototype are tested and debugged according to the test results and output waveforms. The problems in the testing process are analyzed and the circuit and algorithm are improved. Then the prototype is assembled and the stability and reliability are tested. The experimental results basically meet the requirements of the system design. Finally, this paper summarizes the content of the article, and on the basis of this, puts forward the deficiencies and improvement measures.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG438.2

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