【正文】 r supply at present, the traditional phased type regulated power supply has replaced by the high frequency switching power supply, highfrequency switching power supply (also known as switch mode rectifier SMR) by MOSFET and IGBT high frequency work, general control switch frequency in 50100 KHZ range, to achieve high efficiency and miniaturization. Expands unceasingly in recent years, the power switch rectifier capacity, capacity of f from 48 v / A 48 v / 20 A, extended to the 48 v / 200 A, 48 v / 400 A.因通信設(shè)備中所用集成電路的種類繁多,其電源電壓也各不相同,在通信供電系統(tǒng)中采用高功率密度的高頻DCDC隔離電源模塊,從中間母線電壓(一般為48V直流)變換成所需的各種直流電壓,這樣可大大減小損耗、方便維護(hù),且安裝、增加非常方便。Communication power supply in the secondary power supply DC/DC converter has been mercialized, modules using high frequency PWM technology, switching frequency about 500 KHZ, the power density of 5 w to 20 w/in3. With the development of large scale integrated circuit, power supply module to realize miniaturization, thus will improve the switch frequency and using the new circuit topology, there are some of the pany development and production with zero current switch and zero voltage switching technology of secondary power supply module, power density is greatly improved. 不間斷電源(UPS) uninterruptible power supply (UPS)不間斷電源(UPS)是計(jì)算機(jī)、通信系統(tǒng)以及要求提供不能中斷場合所必須的一種高可靠、高性能的電源。變頻器電源主電路均采用交流直流交流方案。變頻空調(diào)除了變頻電源外,還要求有適合于變頻調(diào)速的壓縮機(jī)電機(jī)。50Hz交流電經(jīng)全橋整流變成直流,IGBT組成的PWM高頻變換部分將直流電逆變成20kHz的高頻矩形波,經(jīng)高頻變壓器耦合, 整流濾波后成為穩(wěn)定的直流,供電弧使用。國內(nèi)于90年代初期開始研究變頻空調(diào),96年引進(jìn)生產(chǎn)線生產(chǎn)變頻空調(diào)器,逐漸形成變頻空調(diào)開發(fā)生產(chǎn)熱點(diǎn)。超小型UPS發(fā)展也很迅速,、lkVA、2kVA、3kVA等多種規(guī)格的產(chǎn)品。DC/DC converter to a fixed DC voltage transformation as a variable DC voltage, this technology has been widely applied in the trolley buses, subways, trains, stepless variable speed and control of electric vehicle, and to make the control to obtain smooth acceleration and fast response performance, and at the same time receive electrical energy saving effect. Use the dc chopper instead rheostat can save electric energy (20 ~ 30) %. Dc chopper can not only ACTS as voltage regulation (switching power supply), but also can effectively inhibit the action of the grid side harmonic current noise.通信電源的二次電源DC/DC變換器已商品化,模塊采用高頻PWM技術(shù),開關(guān)頻率在500kHz左右,功率密度為5W~20W/in3。目前在程控交換機(jī)用的一次電源中,傳統(tǒng)的相控式穩(wěn)壓電源己被高頻開關(guān)電源取代,高頻開關(guān)電源(也稱為開關(guān)型整流器SMR)通過MOSFET或IGBT的高頻工作,開關(guān)頻率一般控制在50100kHz范圍內(nèi),實(shí)現(xiàn)高效率和小型化。自八十年代后期開始,這一方向已成為國際電力電子學(xué)界的研究熱點(diǎn),論文數(shù)量逐年增加，應(yīng)用領(lǐng)域不斷擴(kuò)大。Traditional AC DC (AC DC) converter when put into operation, will be added a lot of harmonic current to the grid, harmonic loss and interference, as well as a device side of net power factor deterioration of the phenomenon, referred to as the power pollution, for example, uncontrolled rectifier with capacitor filter, the network side harmonic content can reach three times (70 ~ 80) %, the network side of the power factor is only ~ .電力有源濾波器是一種能夠動(dòng)態(tài)抑制諧波的新型電力電子裝置,能克服傳統(tǒng)LC濾波器的不足,是一種很有發(fā)展前途的諧波抑制手段。High pressure highpower switch mode dc power supply is widely used in electrostatic dust removal, water quality improvement, medical Xray and CT machine and other large equipment. Voltage up to 50 ~ l59kV, current of A above, power up to 100 kw.自從70年代開始,日本的一些公司開始采用逆變技術(shù),將市電整流后逆變?yōu)?kHz左右的中頻,然后升壓。由于IGBT大容量模塊的商用化,這種電源更有著廣闊的應(yīng)用前景。至1997年,其占有率已達(dá)到日本家用空調(diào)的70%以上。微處理器軟硬件技術(shù)的引入,可以實(shí)現(xiàn)對UPS的智能化管理,進(jìn)行遠(yuǎn)程維護(hù)和遠(yuǎn)程診斷。用直流斬波器代替變阻器可節(jié)約電能(20~30)%。在通信領(lǐng)域中,通常將整流器稱為一次電源,而將直流直流(DC/DC)變換器稱為二次電源。Into the eighty s, large scale and very large scale integrated circuit technology rapid development, laid the groundwork for the development of modern power electronic technology. Fine processing technology and integrated circuit technology will bine high voltage large current technology, appeared a batch of new type all control the power device, the first is the advent of power M0SFET, led to the small and mediumsized power sources to the development of high frequency, and insulated gate bipolar transistor (IGBT), and high frequency development opportunity for the large and mediumsized power sources. Thereafter, MOSFET and IGBT of power electronics is the traditional to the modern power electronic transformation. According to statistics, by the end of 1995, power M0SFET and GTR in power semiconductor devices on the market has reached the point of vie, and replace GTR with IGBT have been established in the field of power electronics. The development of the new device not only provides a high frequency ac motor frequency control of motor speed, make its function more perfect and reliable, and makes the development of modern electronic technology constantly to high frequency change, for efficient energy saving, material saving of electrical equipment to achieve small, lightweight, mechanical and electrical integration and intelligentization provides important technical foundation.2. 現(xiàn)代電力電子的應(yīng)用領(lǐng)域2. The application field of modern power electronics 計(jì)算機(jī)高效率綠色電源 puter efficient green power supply高速發(fā)展的計(jì)算機(jī)技術(shù)帶領(lǐng)人類進(jìn)入了信息社會(huì),同時(shí)也促進(jìn)了電源技術(shù)的迅速發(fā)展。在七十年代到八十年代,隨著變頻調(diào)速裝置的普及,大功率逆變用的晶閘管、巨型功率晶體管(GTR)和門極可關(guān)斷晶閘管(GT0)成為當(dāng)時(shí)電力電子器件的主角。Current, power electronics as an energysaving, section, automation, intelligent, electromechanical integration, the basis of the application technology is moving in highfrequency, modular hardware structure and the direction of green product performance. In the near future, power electronic technology will enable power technology more mature, economic, practical, achieve high efficiency and high quality.1. 電力電子技術(shù)的發(fā)展1. The development of power electronics technology現(xiàn)代電力電子技術(shù)的發(fā)展方向,是從以低頻技術(shù)處理問題為主的傳統(tǒng)電力電子學(xué),向以高頻技術(shù)處理問題為主的現(xiàn)代電力電子學(xué)方向轉(zhuǎn)變。在不遠(yuǎn)的將來,電力電子技術(shù)將使電源技術(shù)更加成熟、經(jīng) 濟(jì)、實(shí)用,實(shí)現(xiàn)高效率和高品質(zhì)用電相結(jié)合。變頻調(diào)速的關(guān)鍵技術(shù)是將直流電逆變?yōu)?~100Hz的交流電。新型器件的發(fā)展不僅為交流電機(jī)變頻調(diào)速提供了較高的頻率,使其性能更加完善可靠,而且使現(xiàn)代電子技術(shù)不斷向高頻化發(fā)展,為用電設(shè)備的高效節(jié)材節(jié)能,實(shí)現(xiàn)小型輕量化,機(jī)電一體化和智能化提供了重要的技術(shù)基礎(chǔ)。高頻小型化的開關(guān)電源及其技術(shù)已成為現(xiàn)代通信供電系統(tǒng)的主流。Because there are many types of integrated circuit used in munication equipment, the power supply voltage is also each are not identical, in the munication power supply system with high power density of the high frequency DC DC isolation power supply module, from the middle busbar voltage (gene