本文選題：開關電源 + 同步Buck　； 參考：《東北石油大學》2017年碩士論文

【摘要】：開關電源在工業(yè)生產(chǎn)生活中應用廣泛,傳統(tǒng)的開關電源以模擬控制為主,存在一些缺點和不足。隨著數(shù)字控制器主頻的不斷提高、價格的不斷下降、以及運算能力的增強,開關電源數(shù)字控制成為開關電源發(fā)展的新趨勢。本文主要研究同步Buck變換器的數(shù)字控制技術(shù)。首先以同步Buck變換器為研究對象,分析其工作原理,建立數(shù)學模型,然后進行仿真分析。仿真工具使用新型電力電子仿真軟件StarSim和圖形化編程軟件LabVIEW,圖形化的編程環(huán)境可以更直觀的展示算法的結(jié)構(gòu)。在算法方面,選擇PID算法和極點配置算法。提出了極點配置與積分分離相結(jié)合的方法,這樣不僅保證了系統(tǒng)具有良好的啟動性能,又消除了系統(tǒng)的穩(wěn)態(tài)誤差。最后通過仿真實現(xiàn)兩種控制算法做對比分析。仿真結(jié)果表明極點配置算法在啟動、抗電源擾動、抗負載擾動的性能比PID算法更具優(yōu)勢。在仿真分析中,首先詳細介紹PID算法和極點配置算法的原理,說明在LabVIEW中如何編寫PID算法和通過狀態(tài)反饋控制實現(xiàn)極點配置。闡述了用LabVIEW實現(xiàn)載波比較、死區(qū)時間、紋波計算的方法。為了對算法進一步驗證,以STM32為主控芯片,實際制作同步Buck變換器控制樣機。分別介紹了控制電路、功率電路、驅(qū)動電路、信號調(diào)理電路的設計過程和設計要點。重點說明了開關電源PCB設計的過程和設計規(guī)范。最后在STM32上實現(xiàn)以上兩種算法,給出程序設計流程圖。通過實驗分別得出兩種算法在啟動、負載擾動、電源擾動的波形圖,其結(jié)果與仿真分析一致,驗證了仿真分析的正確性,也證明極點配置算法的優(yōu)越性。
[Abstract]:Switching power supply is widely used in industrial production and life. The traditional switching power supply is based on analog control, which has some shortcomings and shortcomings. With the increasing of the main frequency of the digital controller, the decreasing of the price and the enhancement of the operation ability, the digital control of the switching power supply has become a new trend in the development of the switching power supply. This paper mainly studies the digital control technology of synchronous Buck converter. Firstly, the synchronous Buck converter is studied, its working principle is analyzed, the mathematical model is established, and then the simulation analysis is carried out. The simulation tool uses the new power electronic simulation software StarSim and the graphical programming software LabVIEW. The graphical programming environment can show the structure of the algorithm more intuitively. In the aspect of algorithm, choose pid algorithm and pole assignment algorithm. The method of combining pole assignment with integral separation is proposed, which not only guarantees the system with good startup performance, but also eliminates the steady-state error of the system. Finally, two control algorithms are simulated and compared. The simulation results show that the pole assignment algorithm is better than pid algorithm in the performance of anti-power disturbance and anti-load disturbance. In the simulation analysis, the principle of pid algorithm and pole assignment algorithm are introduced in detail, how to write pid algorithm in LabVIEW and how to realize pole assignment by state feedback control are introduced in detail. The method of carrier comparison, dead time and ripple calculation with LabVIEW is described. In order to further verify the algorithm, the synchronous Buck converter control prototype is made with STM32 as the main control chip. The design process and key points of control circuit, power circuit, drive circuit and signal conditioning circuit are introduced respectively. The process and specification of PCB design for switching power supply are described. Finally, the above two algorithms are implemented on STM 32, and the flow chart of program design is given. The waveforms of the two algorithms in start-up, load disturbance and power supply disturbance are obtained by experiments. The results are in agreement with the simulation analysis, which verifies the correctness of the simulation analysis and proves the superiority of the pole assignment algorithm.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM46

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