【摘要】：直流-直流(DC-DC)開(kāi)關(guān)變換器主要是利用現(xiàn)代電力電子技術(shù)來(lái)控制開(kāi)關(guān)管的導(dǎo)通和關(guān)斷的時(shí)間比率,從而達(dá)到直流斬波和控制輸出電壓的目的。脈沖寬度調(diào)制技術(shù)是一種比較經(jīng)典的開(kāi)關(guān)電源控制技術(shù),利用PWM波來(lái)控制開(kāi)關(guān)管,但是其電路復(fù)雜,系統(tǒng)抗干擾能力差。脈沖序列控制(pulse train,PT)是近年來(lái)興起一種新型開(kāi)關(guān)電源控制技術(shù),其控制電路相對(duì)于經(jīng)典PWM控制電路更加簡(jiǎn)單,系統(tǒng)抗干擾能力更強(qiáng),當(dāng)PT控制技術(shù)應(yīng)用于電感電流斷續(xù)工作模式(discontinuous conduction mode,DCM)DC-DC變換器時(shí)特性?xún)?yōu)良,但應(yīng)用于連續(xù)工作模式(continuous conduction mode,CCM)變換器時(shí)會(huì)出現(xiàn)控制問(wèn)題,因此PT控制變換器帶負(fù)載能力不足。針對(duì)這一突出問(wèn)題,本文研究一種新型的PT控制電感電流偽連續(xù)工作模式(pseudo-continuous conduction mode,PCCM)變換器,將PT控制技術(shù)與新型電路拓?fù)湎嘟Y(jié)合,有效提高了變換器的帶載能力。論文介紹了PT控制PCCM變換器的工作原理,運(yùn)用MATLAB軟件得出了仿真工作波形,設(shè)計(jì)了基于DSP的硬件電路,并得出了實(shí)驗(yàn)波形,進(jìn)一步證明了相關(guān)結(jié)論。本文主要研究成果如下:(1)對(duì)PT控制PCCM模式Buck變換器的帶負(fù)載能力進(jìn)行理論分析。(2)運(yùn)用MATLAB搭建PT控制PCCM工作模式DC-DC Buck變換器的仿真模型,觀察仿真實(shí)驗(yàn)波形,證明理論分析的正確性。(3)根據(jù)仿真模型原理,設(shè)計(jì)基于DSP的硬件電路,并在CCStudio v3.3平臺(tái)上進(jìn)行軟件編程部分設(shè)計(jì)。(4)利用仿真器將程序下載到DSP開(kāi)發(fā)板,并將開(kāi)發(fā)板與硬件電路相連接,進(jìn)行硬件電路實(shí)驗(yàn)。(5)將硬件電路采集得到的波形與軟件仿真所的波形進(jìn)行對(duì)比分析并得出結(jié)論。
[Abstract]:The DC-DC (DC-DC) switching converter mainly uses modern power electronic technology to control the time ratio of switch on and off, so as to achieve the purpose of DC chopping and output voltage control. Pulse width modulation is a classical switching power supply control technology, which uses PWM wave to control the switch tube, but its circuit is complex and the anti-interference ability of the system is poor. Pulse sequence Control (pulse train,PT) is a new type of switching power supply control technology. Its control circuit is simpler than the classical PWM control circuit, and the anti-jamming ability of the system is stronger. When the PT control technique is applied to the (discontinuous conduction mode,DCM) DC-DC converter with inductance current intermittent operation, the characteristics are good, but the control problem will occur when it is applied to the (continuous conduction mode,CCM) converter in the continuous operation mode, so the PT control converter has insufficient load capacity. To solve this problem, a new type of PT controlled inductor current pseudo-continuous mode (pseudo-continuous conduction mode,PCCM) converter is studied in this paper, which combines the PT control technology with the new circuit topology and effectively improves the load capacity of the converter. The working principle of PCCM converter controlled by PT is introduced in this paper. The simulation work waveform is obtained by using MATLAB software, the hardware circuit based on DSP is designed, and the experimental waveform is obtained, which further proves the relevant conclusions. The main research results of this paper are as follows: (1) theoretical analysis of the load capacity of PT controlled PCCM mode Buck converter. (2) the simulation model of PCCM operating mode DC-DC Buck converter controlled by MATLAB is built by MATLAB, and the simulation experimental waveform is observed. The correctness of the theoretical analysis is proved. (3) according to the principle of simulation model, the hardware circuit based on DSP is designed, and the part of software programming is designed on the platform of CCStudio v3.3. (4) the program is downloaded to the DSP development board by using simulator. The development board is connected with the hardware circuit, and the hardware circuit experiment is carried out. (5) the waveform collected by the hardware circuit is compared with the waveform of the software simulation institute and the conclusion is drawn.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TM46

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本文編號(hào)：2204284