【正文】 s Toshiba first ac variable frequency speed regulation technology was applied to the air conditioner. Japan to 1997, its share has reached more than 70% of household air conditioning. Frequency conversion air conditioning has the advantages of fortable, energysaving. Beginning in the early 90 s research frequency conversion air conditioning, frequency conversion air conditioner, introduced in 96 production line production gradually formed frequency conversion air conditioning development and production of hot spots. By 2000 or so would be a climax. In addition to variable frequency power supply, frequency conversion air conditioning also requires suitable for frequency control of motor speed of pressor motor. Optimization control strategy, the selection of functional ponents, air conditioning variable frequency power supply is developed by further development direction. 高頻逆變式整流焊機電源 high frequency inverter rectifier welding machine power supply高頻逆變式整流焊機電源是一種高性能、高效、省材的新型焊機電源,代表了當今焊機電源的發(fā)展方向。八十年代初期,日本東芝公司最先將交流變頻調(diào)速技術(shù)應用于空調(diào)器中。Uninterruptible power supply (UPS) is a puter and munications systems and required to provide necessary occasions could not interrupt a high reliable, high performance power supply. Ac mains input into dc rectifier, part of the energy to the battery charging, the another part of the energy to ac inverter, the switch to the load. For the inverter failure can still provide the energy to the load, the other standby power by the power switch on the way.現(xiàn)代UPS普遍了采用脈寬調(diào)制技術(shù)和功率M0SFET、IGBT等現(xiàn)代電力電子器件,電源的噪聲得以降低,而效率和可靠性得以提高。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 (generally of 48 v DC) into the various DC voltages, it can greatly reduce the loss, convenient maintenance, and installation, increase is very convenient. Generally can be directly mounted in the standard control panel, the secondary power supply requirements is high power density. Because of munication increasing, the capacity of munication power supply capacity will also continue to increase. 直流直流(DC/DC)變換器 DC DC converter (DC/DC)DC/DC變換器將一個固定的直流電壓變換為可變的直流電壓,這種技術(shù)被廣泛應用于無軌電車、地鐵列車、電動車的無級變速和控制,同時使上述控制獲得加速平穩(wěn)、快速響應的性能,并同時收到節(jié)約電能的效果。高頻小型化的開關電源及其技術(shù)已成為現(xiàn)代通信供電系統(tǒng)的主流。 (2) current loop reference signal for the voltage loop error signal with full wave rectifier voltage sampling signal of the product. 分布式開關電源供電系統(tǒng) distributed switching power supply power supply system分布式電源供電系統(tǒng)采用小功率模塊和大規(guī)?？刂萍呻娐纷骰静考?利用最新理論和技術(shù)成果,組成積木式、智能化的大功率供電電源,從而使強電與弱電緊密結(jié)合,降低大功率元器件、大功率裝置(集中式)的研制壓力,提高生產(chǎn)效率。s Siemens pany adopts power transistor is done advocate switching element, to increase the frequency of switching power supply to more than 20 KHZ. And the dry type transformer technology is successfully used in high frequency high voltage power supply, to cancel the high voltage transformer tank, reduce the volume of transformer system further.國內(nèi)對靜電除塵高壓直流電源進行了研制,市電經(jīng)整流變?yōu)橹绷?采用全橋零電流開關串聯(lián)諧振逆變電路將直流電壓逆變?yōu)楦哳l電壓,然后由高頻變壓器升壓,最后整流為直流高壓。The frequent because of the bad working conditions of the welding machine power supply is in short circuit, arc, open circuit changes, so the high frequency inverter rectifier welding machine reliability problems bee the key problem of the power supply, is also the most concern of the user. USES the microprocessor as the pulse width modulation (PWM) controller, based on the parameter, information extraction and analysis, to predict various working status, the purpose of system to make adjustments to the system and processing in advance, solved the high power IGBT inverter power supply reliability.國外逆變焊機已可做到額定焊接電流300A,負載持續(xù)率60%,全載電壓60~75V,電流調(diào)節(jié)范圍5~300A,重量29kg。優(yōu)化控制策略,精選功能組件,是空調(diào)變頻電源研制的進一步發(fā)展方向。工頻電源通過整流器變成固定的直流電壓,然后由大功率晶體管或IGBT組成的PWM高頻變換器, 將直流電壓逆變成電壓、頻率可變的交流輸出,電源輸出波形近似于正弦波,用于驅(qū)動交流異步電動機實現(xiàn)無級調(diào)速。交流市電輸入經(jīng)整流器變成直流,一部分能量給蓄電池組充電,另一部分能量經(jīng)逆變器變成交流,經(jīng)轉(zhuǎn)換開關送到負載。一般都可直接裝在標準控制板上,對二次電源的要求是高功率密度。就目前效率為75%的200瓦開關電源而言,電源自身要消耗50瓦的能源。MOSFET和IGBT的相繼問世,是傳統(tǒng)的電力電子向現(xiàn)代電力電子轉(zhuǎn)化的標志。當時國內(nèi)曾經(jīng)掀起了股各地大辦硅整流器廠的熱潮,目前全國大大小小的制造硅整流器的半導體廠家就是那時的產(chǎn)物。在各種高質(zhì)量、高效、高可靠性的電源中起關鍵作用,是現(xiàn)代電力電子技術(shù)的具 體應用。八十年代末期和九十年代初期發(fā)展起來的、以功率MOSFET和IGBT為代表的、集高頻、高壓和大電流于一身的功率半導體復合器件,表明傳統(tǒng)電力電子技術(shù)已經(jīng)進入現(xiàn)代電力電子時代。這時的電力電子技術(shù)已經(jīng)能夠?qū)崿F(xiàn)整流和逆變,但工作頻率較低,僅局限在中低頻范圍內(nèi)。接著開關電源技術(shù)相繼進人了電子、電器設備領域。目前在程控交換機用的一次電源中,傳統(tǒng)的相控式穩(wěn)壓電源己被高頻開關電源取代,高頻開關電源(也稱為開關型整流器SMR)通過MOSFET或IGBT的高頻工作,開關頻率一般控制在50100kHz范圍內(nèi),實現(xiàn)高效率和小型化。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),開關頻率在500kHz左右,功率密度為5W~20W/in3。超小型UPS發(fā)展也很迅速,、lkVA、2kVA、3kVA等多種規(guī)格的產(chǎn)品。國內(nèi)于90年代初期開始研究變頻空調(diào),96年引進生產(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。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。德國西門子公司采用功率晶體管做主開關元件,將電源的開關頻率提高到20kHz以上。與傳統(tǒng)開關電源的區(qū)別是:(l)不僅反饋輸出電壓,還反饋輸入平均電流。已被大型計算機、通信設備、航空航天、工業(yè)控制等系統(tǒng)逐漸采納,也是超高速型集成電路的低電壓電源()的最為理想的供電方式。Telemunication industry has been heavily promoted by the rapid development of the development of munication power supply. Highfrequency miniaturization of switch power supply and its technology has bee the mainstream of modern munication power supply system. In the field of munication, often will be called a rectifier power supply, and DC DC (DC/DC) converter referred to as the secondary power supply. Is the role of a power singlephase or threephase ac power grid transformation into a nominal value of 48 v dc power supply. In SPC exchange with a powe