【正文】 s. d) The GSM space connector data transfer rate is 13Kbps, namely the BTS receiving and dispatching pronunciation data rate is 13KB/S. e) The BTS order handset to establish its emissive power, moves, the cut. 2. BSC base station controller base station controller:a) Several BTS base depots connect BSC, the base depot arrangement channel disposition, the cut, and BTS connect BSC。s radio telephone standard, Joint board reported according to GSM the MOU, GSM has 1,200,000,000 users in the whole world, and the user proliferates more than 120 countries. Because many GSM network operator has the roaming agreement with other overseas operators, therefore works as user after other countries, still might continue to use their mobile phone.An American Famous Correspondence Company Sprint Auxiliary unit, the American persontoperson munication is using GSM to take one kind of wide band persontoperson munication service the technology. This kind of persontoperson munication service finally for Ericsson, Motorola as well as Nokia the handset which produces is establishing more than 400 base depots now. Handset includes telephone, short note beeper and inter.GSM and other technologies are the wireless mobile munication evolutions, wireless mobile munication including highspeed circuit exchange data, general packet radio system, based on GSM network data enlargement mode mobile munication technology as well as general mobile munication service.二、 GSM histories In 1998, the goal replaced GSM for the making the third generation mobile phone (3G) the standard 3GPP start. 3GPP also accepted has maintained and continues to develop the GSM standard the work. ETSI is one of 3GPP members. In the development process, the GSM system39。傳統(tǒng)的逆變器絕大多數(shù)為方波逆變器和準(zhǔn)正弦波逆變器。圖43 加法電路輸出饅頭波5. 主芯片SG3525的第9引腳輸出為測(cè)試點(diǎn)S4，用示波器觀察S4點(diǎn)的波形，看是否為SPWM波，此測(cè)試點(diǎn)應(yīng)為頻率15K的SPWM信號(hào)。與短路故障不同，系統(tǒng)短時(shí)的過載屬于正常工作狀態(tài)，如果過載一發(fā)生就停機(jī)則不利于系統(tǒng)的正常運(yùn)行。由傅立葉分析可知： （31）逆變電路輸出的n次諧波有效值Vn經(jīng)LC濾波后在負(fù)載上的n次諧波電壓為： （32） （33）由上此可見n次諧波衰減了倍。可采用光電耦合 器，但是為了提高驅(qū)動(dòng)電路工作可靠性，采用專用于驅(qū)動(dòng)橋式結(jié)構(gòu)電路的集成電路IR2110可以簡(jiǎn)化驅(qū)動(dòng)電路設(shè)計(jì)、提高系統(tǒng)性能。 IR2110特性1. IR2110基本特點(diǎn)(1) 具有獨(dú)立的低端和高端輸入通道；(2) 懸浮電源采用自舉電路，其高端工作電壓可達(dá)500V；(3) 輸出的電源端(腳3)的電壓范圍為1020V；(4) 邏輯電源的輸入范圍(腳9)515V，可方便的與TTL，CMOS電平相；(5) 匹配，而且邏輯電源地和功率電源地之間允許有1V的便移量；(6) 工作頻率高，可達(dá)500KHz；(7) 開通、關(guān)斷延遲小，分別為120ns和94ns；(8) 圖騰柱輸出峰值電流2A。獲得死區(qū)時(shí)間的簡(jiǎn)單方法是驅(qū)動(dòng)信號(hào)的下降沿不延時(shí)，僅延時(shí)驅(qū)動(dòng)信號(hào)的上升沿。 0 圖29 誤差放大及加法電路圖210 誤差放大及加法電路仿真波形167。由式（22）得：由運(yùn)放構(gòu)成的RC串并聯(lián)正弦波振蕩電路不是靠運(yùn)放內(nèi)部的晶體管進(jìn)入非線性區(qū)穩(wěn)幅，而是通過在外部引入負(fù)反饋來達(dá)到穩(wěn)幅的目的。11腳和14腳相位相差180，拉電流和灌電流峰值達(dá)200mA。 SG3525特性1. SG3525基本特點(diǎn)(1) 工作電壓范圍835V。當(dāng)uruc時(shí)，給V1和V4導(dǎo)通信號(hào)，給V2和V3關(guān)斷信號(hào)。167。 逆變電路167。第四章給出系統(tǒng)調(diào)試過程及測(cè)試波形。逆變器種類很多，根據(jù)逆變器線路逆變?cè)淼牟煌?，有自激振蕩型逆變器、階梯波疊加逆變器和脈寬調(diào)制（PWM）逆變器等。廣泛適用于空調(diào)、家庭影院、電動(dòng)砂輪、電動(dòng)工具、縫紉機(jī)、DVD、VCD、電腦、電視、洗衣機(jī)、抽油煙機(jī)、冰箱，錄像機(jī)、按摩器、風(fēng)扇、照明等，應(yīng)用十分廣泛[1]。 單極性SPWM調(diào)制電路 11167。光伏電源逆變器的設(shè)計(jì)畢業(yè)論文目　錄前　言 1第1章 系統(tǒng)設(shè)計(jì)概述 3167。 SPWM調(diào)制電路結(jié)構(gòu) 11167。我國(guó)太陽能資源非常豐富，理論儲(chǔ)量達(dá)每年17000億噸標(biāo)準(zhǔn)煤。根據(jù)逆變器主回路拓?fù)浣Y(jié)構(gòu)不同，可分為半橋結(jié)構(gòu)、全橋結(jié)構(gòu)、推挽結(jié)構(gòu)等。第1章 系統(tǒng)設(shè)計(jì)概述167。 逆變電路的基本工作原理單相橋式逆變電路為例：S1～S4是橋式電路的4個(gè)臂，由電力電子器件及輔助電路組成。 SPWM調(diào)制技術(shù)167。如io0，V1和V4通，如io0，VD1和VD4通，uo=Ud。(2) ，精度177。由于存在開閉滯后，使輸出和吸收間出現(xiàn)重疊導(dǎo)通。一般要在電路中加入非線性環(huán)節(jié)。 SPWM調(diào)制 PP值饅頭波圖211 SPWM波形產(chǎn)生電路SG3525由一個(gè)雙門限電壓均從基準(zhǔn)電源取得，其高門限電壓低門限電壓，內(nèi)部橫流源向CT充電，其端壓VC線性上升，構(gòu)成鋸齒波的上升沿，當(dāng)時(shí)比較器動(dòng)作，充電過程結(jié)束，上升時(shí)間t1為： （23）比較器動(dòng)作時(shí)使放電電路接通，CT放電，VC下降并形成鋸齒波的下降沿，當(dāng)時(shí)比較器動(dòng)作，放電過程結(jié)束，完成一個(gè)工作循環(huán)，下降時(shí)間間t2為： （24）此時(shí)間即為死區(qū)時(shí)間鋸齒波的基本周期T為： （25）因?yàn)橛缮峡梢婁忼X波的上升沿遠(yuǎn)長(zhǎng)于下降沿，因此上升沿作為工作沿，下降沿作為回掃沿。這樣，死區(qū)時(shí)間設(shè)置電路就可以通過數(shù)字電路實(shí)現(xiàn)了（圖213）。2. 高壓側(cè)懸浮驅(qū)動(dòng)的自舉原理IR2110用于驅(qū)動(dòng)半橋的電路如圖33所示。圖34 IR2110驅(qū)動(dòng)電路IR2110驅(qū)動(dòng)電路原理框圖如圖34所示，其中左上臂HIN_L、左下臂LIN_L、右上臂HIN_R右下臂與LIN_R輸入信號(hào)分別是4，四路單極性的SPWM波形可以保證H橋臂的四個(gè)MOS管兩兩交叉導(dǎo)通，這樣實(shí)現(xiàn)輸出電流的反向，從而使輸出端為交流的高頻SPWM信號(hào)。逆變器輸出電壓的頻率成分以基頻50Hz和開關(guān)頻率f=15KHz為主。同時(shí)采用幾種過電流保護(hù)措施，提高可靠性和合理性，電子電路作為第一保護(hù)措施，快熔僅作為短路時(shí)的部分區(qū)段的保護(hù)，直流快速斷路器整定在電子電路動(dòng)作之后實(shí)現(xiàn)保護(hù)，過電流繼電器整定在過載時(shí)動(dòng)作。6. 用一片NE5532即U1A、U1B組成一個(gè)50Hz同步方波發(fā)生電路。這兩種逆變器雖然電路結(jié)構(gòu)簡(jiǎn)單，但輸出的電能質(zhì)量較差，諧波分量大。s function obtains unceasingly richly. It can thus provide a diverse service. The short information service which first introduces by the GSM system (SMS) has provided one kind novel, convenient, the inexpensive munication way. In 1994, GSM has realized based on the circuit switching data traffic and the facsimile service. In 1999, the WAP agreement caused the user to be possible through the handset visit Internet. After 2000, starts the mercial general grouping wireless service (GPRS) to enable the GSM system to be able to provide the data munication by the efficiency higher packet mode. In 2003, the EDGE technology started mercial, has provided the close 3G data munication ability. At present, the 3GPP organization is also developing the GSM standard, with the aim of using already massively deployed the GSM infrastructure, smoothly to 3G technology evolution.三、 GSM characteristics 1. GSM uses the directviewing characteristic: The GSM system has several important characteristics: Security beats ability to be good, the network capacity is big, the handset number fruitful in resources, the telephone conversation are clear, the stability not easily is disturbed, the information to be keen, the telephone conversation dead angle are few, the handset power consumption is low.2. GSM technical Characteristic:1. Frequency spectrum efficiency. Because used the highly effective modulator, the channel coding, to interweave, balanced and the speech coding technology, enabled the system to have the highfrequency spectrum efficiency. 2.