本文關(guān)鍵詞： 高功率因數(shù) 反激變換器 智能化 模糊PID　出處：《西安科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：大功率的LED多應(yīng)用于航海、軍事、廣場(chǎng)照明、農(nóng)業(yè)大棚照明等領(lǐng)域。其驅(qū)動(dòng)電源性能的優(yōu)劣,直接影響到LED的發(fā)光效果,以及工作的可靠性與穩(wěn)定性。因此,研究開發(fā)高功率因數(shù)、高效率、智能化、長(zhǎng)壽命的驅(qū)動(dòng)電源意義重大。數(shù)字控制驅(qū)動(dòng)電源的優(yōu)勢(shì)在于能夠通過編寫軟件,從而改進(jìn)或改變控制策略。另外,數(shù)化控制能夠簡(jiǎn)化系統(tǒng)的硬件電路,使得電源的制造成本大幅降低,同時(shí)也可以減小電路受硬件老化而帶來的影響。更重要的是,數(shù)字控制能夠?qū)崿F(xiàn)高精度控制,在提高系統(tǒng)性能的同時(shí),可以使得驅(qū)動(dòng)電源更加智能化。設(shè)計(jì)以STM32F103RCT6為主控制器,反激變換器為主拓?fù)浣Y(jié)構(gòu),并基于模糊PID的控制策略,設(shè)計(jì)了模糊規(guī)則表。從優(yōu)化電源效率,提高電源功率因數(shù),提升電源工作的可靠性與穩(wěn)定性,以及使得驅(qū)動(dòng)電源的控制方式更加智能化等多方面因素綜合考慮,設(shè)計(jì)了一種基于模糊PID控制的單級(jí)PFC恒流源。在Matlab/Simulink環(huán)境中建立了基于模糊PID控制的系統(tǒng)模型,并對(duì)其進(jìn)行了仿真,仿真結(jié)果驗(yàn)證了控制策略的可行性以及系統(tǒng)工作的穩(wěn)定性與可靠性。在此基礎(chǔ)之上,以STM32作為主控制器,對(duì)輸出電壓、輸入電壓以及輸入電流進(jìn)行采樣,將采樣值輸入STM32控制器,控制器通過程序的運(yùn)算處理,產(chǎn)生相應(yīng)的PWM波形,控制開關(guān)管的導(dǎo)通與關(guān)斷,從而實(shí)現(xiàn)電源的恒流輸出以及功率因數(shù)的校正。最終在實(shí)際試驗(yàn)中測(cè)得的實(shí)驗(yàn)數(shù)據(jù)表明,對(duì)恒流源的理論分析正確,控制策略也是可行的,并且系統(tǒng)性能指標(biāo)能夠達(dá)到設(shè)計(jì)的要求。
[Abstract]:High-power LED is widely used in navigation, military, square lighting, agricultural greenhouse lighting and other fields. The performance of its driving power directly affects the luminous effect of LED, as well as the reliability and stability of work. The research and development of high power factor, high efficiency, intelligent, long life driving power supply is of great significance. The advantage of digital control drive power supply lies in the ability to improve or change control strategy by writing software. Digital control can simplify the hardware circuit of the system, greatly reduce the manufacturing cost of the power supply, and reduce the influence of the hardware aging on the circuit. More importantly, the digital control can achieve high precision control. While improving the performance of the system, the drive power supply can be more intelligentized. In this paper, STM32F103RCT6 is used as the main controller and flyback converter is the main topology. Based on the fuzzy PID control strategy, the fuzzy rule table is designed to optimize the power supply efficiency. To improve the power factor of power supply, improve the reliability and stability of power supply, and make the control mode of driving power more intelligent and so on, A single stage PFC constant current source based on fuzzy PID control is designed. The system model based on fuzzy PID control in Matlab/Simulink environment is established and simulated. The simulation results verify the feasibility of the control strategy and the stability and reliability of the system. On this basis, the output voltage, input voltage and input current are sampled with STM32 as the main controller. The sampling value is input into the STM32 controller. The controller generates the corresponding PWM waveform through the calculation and processing of the program, and controls the switch on and off. Thus, the constant current output of the power supply and the correction of the power factor are realized. Finally, the experimental data measured in the actual experiment show that the theoretical analysis of the constant current source is correct, and the control strategy is also feasible. And the system performance index can meet the design requirements.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM46

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本文編號(hào)：1512483