【摘要】：作為移動通信基站核心設(shè)備的射頻拉遠(yuǎn)模塊技術(shù)不斷更新,發(fā)射功率提升迅速,由此帶來的射頻拉遠(yuǎn)模塊電源系統(tǒng)的匹配成了它的一個研發(fā)方向。隨著科學(xué)技術(shù)的進(jìn)步,射頻拉遠(yuǎn)模塊朝著小型化方向發(fā)展,其內(nèi)部電源設(shè)計要求較以往更加苛刻。我們不但需要減小電源體積,還需要增加電源功率輸出,同時保障電源的可靠性。近幾年來,電源控制技術(shù)以及功率轉(zhuǎn)換技術(shù)的進(jìn)步使得上述看似矛盾的問題得到了突破。功率器件工藝上的不斷改進(jìn),新型磁性材料的廣泛應(yīng)用,不斷融入新的相關(guān)科技,都使得通信電源變得更加可靠更加穩(wěn)定,而且電磁兼容,系統(tǒng)的動態(tài)響應(yīng)等性能指標(biāo)也取得巨大進(jìn)步�，F(xiàn)代數(shù)字化電路的引入,也讓電源更加智能化,可以通過程序控制電源輸出,并進(jìn)行實時監(jiān)控。本論文正是針對上述問題,以高性能輸出小型射頻拉遠(yuǎn)模塊電源系統(tǒng)為主要的研究對象,在深入分析當(dāng)今開關(guān)電源理論和技術(shù)原理的基礎(chǔ)上,設(shè)計一款高功率密度的小型射頻拉遠(yuǎn)模塊電源系統(tǒng)。主要內(nèi)容為:1.確認(rèn)電源系統(tǒng)輸入輸出性能指標(biāo)要求,綜合考慮功率需求、運行環(huán)境及可靠性要求,根據(jù)實際需求整合電源輸出,并擬制出小型射頻拉遠(yuǎn)模塊電源系統(tǒng)設(shè)計規(guī)范書。2.根據(jù)電源系統(tǒng)設(shè)計規(guī)范書設(shè)計電源系統(tǒng)解決方案。選擇小封裝電源控制芯片,分析并應(yīng)用此類芯片設(shè)計出高性能輸出DC-DC電源,精度在1%以內(nèi),紋波輸出10mV以內(nèi),達(dá)到國內(nèi)先進(jìn)水平。3.研究沖擊電流抑制電路,設(shè)計一種新型開關(guān)模式?jīng)_擊電流抑制電路,以使小封裝功率場效應(yīng)管能應(yīng)對更大的沖擊電流,從而縮減電源輸入級尺寸。研究兩線系統(tǒng)的特殊性,并以此設(shè)計新型正激電路,利用原副邊交替輸出使電源變壓器在兩個開關(guān)周期內(nèi)交替退磁,簡化了電路并提高了效率。4.研究I2C總線,完善電源系統(tǒng)功能設(shè)計,使得電源輸出電壓可通過數(shù)字信號調(diào)節(jié),天線外送電源通道切換數(shù)字可控以及電源輸出電壓的實時監(jiān)控。5.研究通信類電源相關(guān)外圍測試項目,針對小型射頻拉遠(yuǎn)模塊的特殊性設(shè)計測試方法。對測試中出現(xiàn)的問題進(jìn)行分析驗證,最終提供滿足各項性能指標(biāo)和功能需求的產(chǎn)品。
[Abstract]:As the core equipment of the mobile communication base station, the technology of RF remote module is constantly updated, and the transmission power is raised rapidly. The matching of RF remote module power supply system has become one of its research and development directions. With the development of science and technology, RF remote module is developing towards miniaturization, and its internal power supply design is more demanding than ever before. We not only need to reduce the power supply volume, but also need to increase the power output, while ensuring the reliability of the power supply. In recent years, the progress of power control technology and power conversion technology has made a breakthrough in these seemingly contradictory problems. The continuous improvement in the process of power devices, the wide application of new magnetic materials, and the continuous integration of new related technologies have made the communication power supply more reliable and stable, and electromagnetic compatibility. The system dynamic response and other performance indicators have also made great progress. The introduction of modern digital circuit also makes the power more intelligent, can control the output of power through the program, and monitor in real time. Aiming at the above problems, this paper takes the high performance output small RF remote module power supply system as the main research object, on the basis of in-depth analysis of the theory and technical principle of current switching power supply. A high power density power supply system for RF remote module is designed. The main content is: 1. The input and output performance requirements of the power supply system are confirmed. Considering the power demand, the operating environment and the reliability requirements, the power output is integrated according to the actual demand, and the specification for the design of the power supply system of the small radio-frequency remote module is developed. According to the power system design specification book, design the power system solution. Select small package power supply control chip, analyze and apply this kind of chip to design high performance output DC-DC power supply, the precision is less than 1%, ripple output 10mV is less than, reach the domestic advanced level. 3. The impulse current suppression circuit is studied and a novel switching mode impulse current suppression circuit is designed so that the small encapsulated power FET can cope with larger impulse current and thus reduce the size of the input stage of the power supply. The particularity of two-wire system is studied and a new type of forward circuit is designed. The power transformer is alternately demagnetized in two switching cycles by using the alternating output of the primary and secondary edges, which simplifies the circuit and improves the efficiency. I2C bus is studied to perfect the function design of power supply system, so that the output voltage of power can be adjusted by digital signal, the power supply channel can be switched by digital control and the output voltage of power supply can be monitored in real time. The peripheral test project of communication power supply is studied, and the test method is designed according to the particularity of small RF remote module. Analyze and verify the problems in the test, and finally provide the products that meet the performance and function requirements.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5;TN86

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相關(guān)期刊論文 前1條

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本文編號：2146724