【摘要】：隨著現(xiàn)代電子技術(shù)的發(fā)展，尤其是大規(guī)模集成電路的高速發(fā)展以及數(shù)字集成芯片的出現(xiàn)，由分立元件組成的數(shù)字系統(tǒng)的弊端開始顯現(xiàn)出來，需要對過去的工業(yè)控制系統(tǒng)進(jìn)行現(xiàn)代化改進(jìn)。在核電控制系統(tǒng)中，由于最初的核電控制設(shè)備源于國外進(jìn)口，市場沒有備件可換，急需進(jìn)行國產(chǎn)化研制。棒控電流電路在控制棒驅(qū)動機(jī)構(gòu)中起著重要的作用，控制著核反應(yīng)堆的運(yùn)行狀態(tài)。電路的穩(wěn)定性、可靠性直接決定著棒控系統(tǒng)的安全性和可維護(hù)性。為了實現(xiàn)核電棒控系統(tǒng)國產(chǎn)化要求，本文研究和設(shè)計了基于FPGA控制的棒控電流電路。 首先，，本文對反應(yīng)堆控制棒驅(qū)動電流的工作要求做了詳細(xì)的說明，通過對控制棒驅(qū)動機(jī)構(gòu)的磁場分析，闡述了控制棒驅(qū)動機(jī)構(gòu)的工作原理：電流流過銜鐵，根據(jù)電磁感應(yīng)原理產(chǎn)生磁力，磁力和控制棒重力的相互作用控制反應(yīng)堆控制棒移動�；趯刂瓢趄�(qū)動機(jī)構(gòu)的工作規(guī)范和基本原理的認(rèn)識，提出以FPGA為核心控制控制棒的設(shè)計方案，并使用MATLAB建立了整流電路模型，分析了以FPGA控制IGBT產(chǎn)生可調(diào)電流方案的可行性。 其次，根據(jù)棒控電流電路的控制方法以及PLC控制邏輯，綜合設(shè)計了由兩個IGBT串聯(lián)的主電路及其驅(qū)動電路、閉環(huán)控制電路、電流檢測電路、電源DC-DC轉(zhuǎn)換電路、穩(wěn)壓電路以及濾波電路。通過模擬電路和數(shù)字電路相結(jié)合，設(shè)計并實現(xiàn)了系統(tǒng)自動調(diào)節(jié)，輸出穩(wěn)定電流。通過對系統(tǒng)電壓電流分析，實現(xiàn)了不同模塊之間信號的良好匹配。系統(tǒng)使用CMOS系列芯片，提高了反應(yīng)速度。使用數(shù)字電位器設(shè)置和調(diào)整系統(tǒng)參數(shù)，實現(xiàn)了系統(tǒng)參數(shù)與計算機(jī)的實時傳遞，使用FPGA對整個系統(tǒng)進(jìn)行實時控制，編寫了基于Verilog硬件語言的控制程序，使用VC++編寫了上位機(jī)控制界面。 最后，本文在系統(tǒng)PCB設(shè)計及機(jī)箱布局中，進(jìn)行了電磁兼容性分析，保證在復(fù)雜電磁環(huán)境中系統(tǒng)能夠正常運(yùn)行。本文設(shè)計的棒控電流電路系統(tǒng)經(jīng)過模擬負(fù)載測試，得到了系統(tǒng)所要求的電流波形，實現(xiàn)了人機(jī)交互控制，證明了設(shè)計的合理性和正確性。
[Abstract]:With the development of modern electronic technology, especially the rapid development of large scale integrated circuits and the emergence of digital integrated chips, the malpractice of digital systems composed of discrete components has begun to appear. The past industrial control system needs to be modernized and improved. In the nuclear power control system, because the original nuclear power control equipment is imported from abroad, there are no spare parts to replace in the market. Rod-controlled current circuit plays an important role in the control rod driving mechanism and controls the operation state of the nuclear reactor. The stability and reliability of the circuit directly determine the safety and maintainability of the rod control system. In order to meet the requirement of localization of nuclear power rod control system, this paper studies and designs the Rod Control current Circuit based on FPGA control. First of all, this paper describes the working requirements of the control rod drive current in detail. Through the magnetic field analysis of the control rod drive mechanism, the working principle of the control rod drive mechanism is described: the current flows through the armature, According to the electromagnetic induction principle, the interaction between magnetic force and control rod gravity controls the reactor control rod movement. Based on the understanding of the working standard and basic principle of the control rod drive mechanism, the design scheme of the control rod with FPGA as the core is put forward, and the rectifier circuit model is established by using MATLAB. The feasibility of using FPGA to control the IGBT to generate adjustable current is analyzed. Secondly, according to the control method of the Rod current circuit and the PLC control logic, the main circuit and its driving circuit, the closed-loop control circuit, the current detection circuit and the power supply DC-DC conversion circuit are designed. Voltage stabilizing circuit and filter circuit. Through the combination of analog circuit and digital circuit, the system automatically adjusts and outputs stable current. By analyzing the voltage and current of the system, the signal matching between different modules is realized. The system uses CMOS series chips to improve the reaction speed. The system parameters are set and adjusted by digital potentiometer, and the real-time transmission between system parameters and computer is realized. The whole system is controlled in real time by FPGA, and the control program based on Verilog hardware language is written. The upper computer control interface is written with VC. Finally, EMC analysis is carried out in the system PCB design and chassis layout to ensure the normal operation of the system in complex electromagnetic environment. The Rod controlled current circuit system designed in this paper has been tested by analog load, and the required current waveform has been obtained. The human-computer interaction control has been realized, and the rationality and correctness of the design have been proved.
【學(xué)位授予單位】：北京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN791

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