移動通信開關電源的新技術及其應用電氣工程及其自動化畢業(yè)論文中英文翻譯-文庫吧資料
2024-11-25 10:06本頁面
【正文】 sible to cause during various modules toflow the error to be smaller than positive and negative 3%, greatlyenhanced the system reliability. Above introduced in the mobile munication system use high frequency switching power supply uses some new technologies, in these powerequipment besides have used above introduces the technology, but alsohas used battery charging voltage temperature pensation, theopening machine slow start, the longdistance digit dialingmonitoring, the breakdown automatic detection and so on the new technology, these new technical uses, enable the high frequencyswitching power supply each performance index all to have a largerscale enhancement, causes the high frequency switching power supply tobe more and more stable. At present in some high frequency switching power supply product alsohas used renewal the and so on frequency modulation, monolithicintegrated circuit control technology, these technical uses will beable to cause the high frequency switching power supply maturer andare perfect, understood, will track and grasps these new technologiesto be able constructs the bigger instruction function to our lineservice and the engineering design. 移動通信開關電源的新技術及其應用 摘 要 本文介紹了目前移動通信網(wǎng)中使用的開關電源所采用的新技術和其實際應用，了解和掌握這些新技術對設備維護和工程建設均具有重要的現(xiàn)實意義。, after profile superimposition, And is causing the profile is the sine wave as far as possible,reduces the wave distortion, thus causes the exchange input the powergroup number to be approximate is 1. The power factor pensation electric circuit may divide into the active pensating circuit andthe passive pensating circuit two kinds, at present various factories widely use are the active power factor pensation electric circuit, this electric circuit core part is American Unitrode Corporation39。Pf=,I=。s power (center is permanent), the Beijing concerted effortlink, Wuhan 517 and so on the factory high frequency switching powersupply product, may divide into +27V and the 48V two kind of seriesaccording to the output voltage factories products although in seemingly difference bigger, but all has used some same or the similar new technology, therefore the product quality and the performance index relative are better. Underunifies several kind of switching power supplies which the Jiangsu Province mobile munication equipment uses, summarizes introduced ,now in the high frequency switching power supply uses some new technologies as well as use these new technical the reason and its thepractical significance. Uses the new powe
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