外文翻譯智能開關電源

1、Intelligent switch power supply英文：With the rapid development of electronic technology, application field of electronic system is more and more extensive, electronic equipment, there are more and more people work with electronic equipment, life is increasingly close relationship. Any electronic equip

2、ment are inseparable from reliable power supply for power requirements, they more and more is also high. Electronic equipment miniaturized and low cost in the power of light and thin, small and efficient for development direction. The traditional transistors series adjustment manostat is continuous

3、control linear manostat. This traditional manostat technology more mature, and there has been a large number of integrated linear manostat module, has the stable performance is good, output ripple voltage small, reliable operation, etc. But usually need are bulky and heavy industrial frequency trans

4、former and bulk and weight are big filter.In the 1950s, NASA to miniaturization, light weight as the goal, for a rocket carrying the switch power development. In almost half a century of development process, switch power because of its small volume, light weight, high efficiency, wide range, voltage

5、 advantages in electric, control, computer, and many other areas of electronic equipment has been widely used. In the 1980s, a computer is made up of all of switch power supply, the first complete computer power generation. Throughout the 1990s, switching power supply in electronics, electrical equi

6、pment, home appliances areas to be widely, switch power technology into the rapid development. In addition, large scale integrated circuit technology, and the rapid development of switch power supply with a qualitative leap, raised high frequency power products of, miniaturization, modular tide.Powe

7、r switch tube, PWM controller and high-frequency transformer is an indispensable part of the switch power supply. The traditional switch power supply is normally made by using high frequency power switch tube division and the pins, such as using PWM integrated controller UC3842 + MOSFET is domestic

8、small power switch power supply, the design method of a more popularity.Since the 1970s, emerged in many function complete integrated control circuit, switch power supply circuit increasingly simplified, working frequency enhances unceasingly, improving efficiency, and for power miniaturization prov

9、ides the broad prospect. Three end off-line pulse width modulation monolithic integrated circuit TOP (Three switch Line) will Terminal Off with power switch MOSFET PWM controller one package together, has become the mainstream of switch power IC development. Adopt TOP switch IC design switch power,

10、can make the circuit simplified, volume further narrowing, cost also is decreased obviouslyMonolithic switching power supply has the monolithic integrated, the minimalist peripheral circuit, best performance index, no work frequency transformer can constitute a significant advantage switching power

11、supply, etc. American PI (with) company in Power in the mid 1990s first launched the new high frequency switching Power supply chip, known as the "top switch Power", with low cost, simple circuit, higher efficiency. The first generation of products launched in 1994 represented TOP100/200 s

12、eries, the second generation product is the TOP Switch - debuted in 1997 . The above products once appeared showed strong vitality and he greatly simplifies thedesign of 150W following switching power supply and the development of new products for the new job, also, high efficiency and low cost swit

13、ch power supply promotion and popularization created good condition, which can be widely used in instrumentation, notebook computers, mobile phones, TV, VCD and DVD, perturbation VCR, mobile phone battery chargers, power amplifier and other fields, and form various miniaturization, density, on price

14、 can compete with the linear manostat AC/DC power transformation module.Switching power supply to integrated direction of future development will be the main trend, power density will more and more big, to process requirements will increasingly high. In semiconductor devices and magnetic materials,

15、no new breakthrough technology progress before major might find it hard to achieve, technology innovation will focus on how to improve the efficiency and focus on reducing weight. Therefore, craft level will be in the position of power supply manufacturing higher in. In addition, the application of

16、digital control IC is the future direction of the development of a switch power. This trust in DSP for speed and anti-interference technology unceasing enhancement. As for advanced control method, now the individual feels haven't seen practicability of the method appears particularly strong,perh

17、aps with the popularity of digital control, and there are some new control theory into switching power supply.（1）The technology: with high frequency switching frequencies increase, switch converter volume also decrease, power density has also been boosted, dynamic response improved. Small power DC -

18、 DC converter switch frequency will rise to MHz. But as the switch frequency unceasing enhancement, switch components and passive components loss increases, high-frequency parasitic parameters and high-frequency EMI and so on the new issues will also be caused.（2）Soft switching technologies: in orde

19、r to improve the efficiency of non-linearity of various soft switch, commutation technical application and hygiene, representative of soft switch technology is passive and active soft switch technology, mainly including zero voltage switch/zero current switch (ZVS/ZCS) resonance, quasi resonant, zer

20、o voltage/zero current pulse width modulation technology (ZVS/ZCS - PWM) and zero voltage transition/zero current transition pulse width modulation (PWM) ZVT/ZCT - technical, etc. By means of soft switch technology can effectively reduce switch loss and switch stress, help converter transformation e

21、fficiency（3）Power factor correction technology (IC simplifies PFC). At present mainly divided into IC simplifies PFC technology passive and active IC simplifies PFC technology using IC simplifies PFC technology two kinds big, IC simplifies PFC technology can improve AC - DC change device input power

22、 factor, reduce the harmonic pollution of power grid.（4）Modular technology. Modular technology can meet the needs of the distributed power system, enhance the system reliability.（5）Low output voltage technology. With the continuous development of semiconductor manufacturing technology, microprocesso

23、r and portable electronic devices work more and more low, this requires future DC - DC converter can provide low output voltage to adapt microprocessor and power supply requirement of portable electronic devicesPeople in switching power supply technical fields are edge developing related power elect

24、ronics device, the side of frequency conversion technology, development of switch between mutual promotion push switch power supply with more than two year growth toward light, digital small, thin, low noise and high reliability, anti-interference direction. Switching powersupply can be divided into

25、 the AC/DC and DC/DC two kinds big, also have AC/AC DC/AC as inverter DC/DC converter is now realize modular, and design technology and production process at home and abroad, are mature and standardization, and has approved by users, but the AC/DC modular, because of its own characteristics in the p

26、rocess of making modular, meet more complex technology and craft manufacture problems. The following two types of switch power supply respectively on the structure and properties of this.Switching power supply is the development direction of high frequency, high reliability, low consumption, low noi

27、se, anti-jamming and modular. Because light switch power, small, thin key techniques are changed, so high overseas each big switch power supply manufacturer are devoted to the development of new high intelligent synchronous rectifier, especially the improvement of secondary devices of the device, an

28、d power loss of Zn ferrite (Mn) material? By increasing scientific and technological innovation, to enhance in high frequency and larger magnetic flux density (Bs) can get high magnetic under the miniaturization of, and capacitor is a key technology. SMT technology application makes switching power

29、supply has made considerable progress, both sides in the circuitboard to ensure that decorate components of switch power supply light, small, thin. The high frequency switching power supply of the traditional PWM must innovate switch technology, to realize the ZCS ZVS, soft switch technology has bec

30、ome the mainstream of switch power supply technical, and greatly improve the efficiency of switch power. For high reliability index, America's switch power producers, reduce by lowering operating current measures such as junction temperature of the device, in order to reduce stress the reliabili

31、ty of products made greatly increased.Modularity is of the general development of switch power supply trend can be modular power component distributed power system, can be designed to N + 1 redundant system, and realize the capacity expansion parallel. According to switch power running large noise t

32、his one defect, if separate the pursuit of high frequency noise will increase its with the partial resonance, and transform circuit technology, high frequency can be realized in theory and can reduce the noise, but part of the practical application of resonant conversion technology still have a tech

33、nical problem, so in this area still need to carry out a lot of work, in order to make the technology to practional utilization.Power electronic technology unceasing innovation, switch power supply industry has broad prospects for development. To speed up the development of switch power industry in

34、China, we must walk speed of technological innovation road, combination with Chinese characteristics in the joint development path, for I the high-speed development of national economy to make the contribution. The basic principle and component functionAccording to the control principle of switch po

35、wer to classification, we have the following 3 kinds of work mode:1) pulse width adjustment type, abbreviation Modulation Pulse Width pulse width Modulation (PWM) type, abbreviation for. Its main characteristic is fixed switching frequency, pulse width to adjust by changing voltage 390v, realize the

36、 purpose. Its core is the pulse width modulator. Switch cycle for designing filter circuit fixed provided convenience. However, its shortcomings is influenced by the power switch conduction time limit minimum of output voltage cannot be wide range regulation; In addition, the output will take dummy

37、loads commonly (also called pre load), in order to prevent the drag elevated when output voltage. At present, most of the integrated switch power adopt PWM way.2) pulse frequency Modulation mode pulse frequency Modulation (, referred to Pulse Frequency Modulation, abbreviation for PFM) type. Its cha

38、racteristic is will pulse width fixed by changing switch frequency to adjust voltage 390v, realize the purpose. Its core is the pulse frequency modulator. Circuit design to use fixed pulse-width generator to replace the pulse width omdulatros and use sawtooth wave generator voltage？Frequency convert

39、er (for example VCO changes frequency VCO). It on voltage stability principle is: when the output voltage Uo rises, the output signal controller pulse width unchanged and cycle longer, make Uo 390v decreases, and reduction. PFM type of switch power supply output voltage range is very wide, output te

40、rminal don't meet dummy loads. PWM way and way of PFM respectively modulating waveform is shown in figure 1 (a), (b) shows, tp says pulse width (namely power switch tube conduction time tON), T represent cycle. It can be easy to see the difference between the two. But they have something in comm

41、on: (1) all use time ratio control (TRC) on voltage stability principle, whether change tp, finally adjustment or T is pulse 390v. Although adopted in different ways, but control goals, is all rivers run into the sea. (2) when load by light weight, or input voltage respectively, from high changed by

42、 increasing the pulse width, higher frequency method to make the output voltage remained stable.3) mix modulation mode, it is to point to the pulse width and switching frequency is not fixed, each other can change, it belongs to the way the PWM and PFM blend mode. It contains a pulsewidthomdulatros

43、and pulse frequency modulator. Because and T all can adjust alone, so occupies emptiescompared to adjust the most wide range, suitable for making the output voltage for laboratories that use a wide range of can adjust switching power supply. Above 3 work collectively referred to as "Time Ratio

44、Control" (as a Control, from TRC) way. As noted, pulse width omdulatros either as a independent IC use (for example UC3842 type pulse width omdulatros), can also be integrated in DC/DC converter (for example LM2576 type switching voltage regulators integrated circuit), still can integration in

45、AC/DC converter (for example TOP250 type monolithic integrated circuit switching power supply. Among them, the switching voltage regulators belong to DC/DC power converter, switching power supply general for AC/DC power converter.The typical structure of switch power as figure1shows, its working pri

46、nciple is: the first utility into power rectifier and filtering into high voltage dc and then through the switch circuit and high-frequency switch to high frequency low pressure pulse transformer, and then after rectification and filter circuits, finally output low voltage dc power. Meanwhile in the

47、 output parts have a circuit feedback to control circuit, through the control PWM occupies emptiescompared to achieve output voltage stability.Figure 1 typical structure of switch power supplySwitching power supply by these four components:1) the main circuit: exchange network input, from the main c

48、ircuit to dc output. Mainly includes input filter, rectifier and filtering, inverter, and output rectifier and filtering.(1) input filter: its effect is the power grid existing clutter filtering, also hinder the machine produces clutter feedback to public power grid.(2) rectifier and filter: the pow

49、er grid ac power directly for a smooth dc rectifier, for the next level transformation.(3) inverter: will the dc after rectifying a high-frequency ac, this is the core of high frequency switching power supply, the higher the frequency, the volume, weight and the ratio of power output and smaller.(4)

50、 Out put rectifier and filter: according to load needs, providing stable and reliable dc power supply. 2) control circuit: on the one hand, from the output by sampling with set standards to compare, and then to control inverter, changing its frequency or pulse width, achieve output stability, on the

51、 other hand, according to data provided by the test circuit, the protection circuit differential, provide control circuit to the machine to various protection measures. Including the output feedback circuit and sampling circuit, pulse width modulator. 3) the detection and protection circuit: detecti

52、on circuit had current detection, over-voltage detection, owe voltage detection, overheat detection, etc.; Protection circuit can be divided over current protection, over-voltage protection, owe voltage protection, the ground-clamp protection, overheating protection, automatic restart, soft start, s

53、low startup, etc. Various types. 4) Other circuit: if the sawtooth wave generator, offset circuit, optical coupler, etc.智能開關電源中文：隨著電子技術的高速發(fā)展，電子系統(tǒng)的應用領域越來越廣泛，電子設備的種類也越來越多，電子設備與人們的工作、生活的關系日益密切。任何電子設備都離不開可靠的電源，它們對電源的要求也越來越高。電子設備的小型化和低成本化使電源以輕、薄、小和高效率為發(fā)展方向。傳統(tǒng)的晶體管串聯(lián)調(diào)整穩(wěn)壓電源是連續(xù)控制的線性穩(wěn)壓電源。這種傳統(tǒng)穩(wěn)壓電源技術比較成熟，并且已有大量

54、集成化的線性穩(wěn)壓電源模塊，具有穩(wěn)定性能好、輸出波紋電壓小、使用可靠等優(yōu)點。但通常都需要體積大且笨重的工頻變壓器與體積和重量都很大的濾波器。二十世紀五十年代，美國宇航局以小型化、重量輕為目標，為搭載火箭開發(fā)了開關電源。在近半個世紀的發(fā)展過程中，開關電源因具有重量輕、體積小、效率高、穩(wěn)壓范圍寬等優(yōu)點，在電子電氣、控制、計算機等許多領域的電子設備中得到了廣泛的使用。二十世紀八十年代，計算機全面實現(xiàn)了開關電源化，率先完成計算機的電源換代。二十世紀九十年代，開關電源在電子、電器設備、家電領域得到了廣泛的應用，開關電源技術進入快速發(fā)展期。此外，大規(guī)模集成電路技術的迅速發(fā)展，又使開關電源有了質的飛躍，掀起了

55、電源產(chǎn)品高頻化、小型化、模塊化的浪潮。功率開關管、PWM控制器和高頻變壓器是開關電源必不可少的組成部分。傳統(tǒng)的開關電源一般均采用分立的高頻功率開關管和多引腳的PWM集成控制器，例如采用UC3842+MOSFET是國內(nèi)小功率開關電源中較為普及的設計方法。七十年代以來，涌現(xiàn)出許多功能完備的集成控制電路，使開關電源電路日益簡化，工作頻率不斷提高，效率提高，并為電源小型化提供了廣闊的前景。三端離線式脈寬調(diào)制單片開關集成電路TOP(Three Terminal Off Line)將PWM控制器與功率開關MOSFET合二為一封裝在一起，已成為開關電源IC發(fā)展的主流。采用TOP開關集成電路設計開關電源，可使

56、電路簡化，體積進一步縮小，成本也明顯降低。單片開關電源具有單片集成化、最簡外圍電路、最佳性能指標、能構成無工頻變壓器開關電源等顯著優(yōu)點。美國PI(Power Integration)公司于上世紀九十年代中期率先推出的新型高頻開關電源芯片，被譽為"頂級開關電源"，具有成本低，電路簡單，效率高等優(yōu)點。其第一代產(chǎn)品以1994年推出的TOP100/200系列為代表，第二代產(chǎn)品則是1997年問世的TOPSwitch-。上述產(chǎn)品一經(jīng)問世便顯示出強大的生命力，他極大地簡化了150W以下開關電源的設計和新產(chǎn)品的開發(fā)工作，也為新型、高效、低成本開關電源的推廣與普及創(chuàng)造了良好條件，可廣泛用于儀

57、器儀表、筆記本電腦、移動電話、電視機、VCD和DVD、攝錄像機、手機電池充電器、功率放大器等領域，并構成各種小型化、高密度、在價格上能與線性穩(wěn)壓電源相競爭的AC/DC電源變換模塊。開關電源向集成化方向發(fā)展將是未來的主要趨勢,功率密度將越來越大,對工藝的要求也會越來越高.在半導體器件和磁性材料沒有新的突破之前,重大的技術進展可能很難實現(xiàn),技術創(chuàng)新的重點將集中在如何提高效率和減小重量.因此,工藝水平將會在電源制造中占的地位越來越高.另外,數(shù)字控制集成電路的應用也是將來開關電源發(fā)展的一個方向.這信賴于DSP運行速度和抗干擾技術的不斷提高.至于先進的控制方法,目前個人覺得還沒有看到實用性特別強的方法出

58、現(xiàn),也許隨著數(shù)字控制的普及,會有一些新的控制理論運用到開關電源中來.（1）高頻化技術：隨著開關頻率的提高，開關變換器的體積也隨之減少，功率密度也得到大幅提升，動態(tài)響應得到改善。小功率DC-DC變換器的開關頻率將上升到MHz。但隨著開關頻率的不斷提高，開關元件和無源元件損耗的增加、高頻寄生參數(shù)以及高頻EMI等新的問題也將隨之產(chǎn)生。（2）軟開關技術：為提高變換器的變換效率，各種軟開關技術應用而生，具有代表性的是無源軟開關技術和有源軟開關技術，主要包括零電壓開關/零電流開關（ZVS/ZCS）諧振、準諧振、零電壓/零電流脈寬調(diào)制技術（ZVS/ZCS-PWM）以及零電壓過渡/零電流過渡脈寬調(diào)制（ZVT/

59、ZCT-PWM）技術等。采用軟開關技術可以有效的降低開關損耗和開關應力，有助于變換器變換效率的提高。（3）功率因數(shù)校正技術（PFC）。目前PFC技術主要分為有源PFC技術和無源PFC技術兩大類，采用PFC技術可以提高AC-DC變化器輸入端功率因數(shù)，減少對電網(wǎng)的諧波污染。（4）模塊化技術。采用模塊化技術可以滿足分布式電源系統(tǒng)的需要，提高系統(tǒng)的可靠性。（5）低輸出電壓技術。隨著半導體制造技術的不斷發(fā)展，微處理器和便攜式電子設備的工作越來越低，這就要求未來的DC-DC變換器能夠提供低輸出電壓以適應微處理器和便攜式電子設備的供電要求。人們在開關電源技術領域是邊開發(fā)相關電力電子器件，邊開發(fā)開關變頻技術，兩者相互促進推動著開關電源每年以超過兩位數(shù)字的增長率向著輕、小、薄、低噪聲、高可靠、抗干擾的方向發(fā)展。開關電源可分為AC/DC和DC/DC兩大類，也有AC/AC DC/AC 如逆變器 DC/DC變換器現(xiàn)已實現(xiàn)模塊化，且設計技術及生產(chǎn)工藝在國內(nèi)外均已成熟和標準化，并已得到用戶的認可，但AC/DC的模塊化，因其自身的特性使得在模塊化的進程中，