外文翻譯--高頻開關(guān)電源介紹

1、.The Introduction Of High Frequency Switching Power Supply Introduction:High frequency switching power supply (also called switch rectifier SMR) through the MOSFET or the high frequency IGBT, switch frequency control in 50-100 KHZ, within the scope of efficient and realize miniaturization. In recent

2、 years, switch rectifier power capacity expansion, the capacity of himself, from the volt 48V/12.5A、48V/20A to48V/200A、48V/400A。High frequency switching power supply is traditional rectifier (silicon rectifier, silicon-controlled rectifier) upgrade alternative products. High frequency switching powe

3、r supply with convenient use, small size, high efficiency, stable work, coating meticulous etc absolute superiority quickly dominate the market. Widely used in electroplating electrolysis surface treatment industry oxidation and get old and new customers.Product features:一This product USES imported

4、brand components and international advanced bridge in precision machining technology of inverter, and make the performance is stable, the quality is reliable.二For high-frequency pulse waveforms output ripple coefficient, the 1%, can improve the number of plating and surface aestivation, refuse the g

5、loss and got a dark corner of plating. And can reduce the loss, raw materials of plating industry of special requirements.三SFG series high frequency switching power supply by air-filled type design, installation convenience. With remote control device, easy for operation. Can bring load switch machi

6、ne, reduce the adjustment of the complex procedures.四. Small volume light weight the comprehensive use of anticorrosive craft, enhance the ability of anti-corrosion products, prolong the life.五. Energy saving, high working efficiency reached more than 90%, any more than a linear always voltage match

7、ing. Save the traditional rectifier regulator and the energy loss, in more than 35%, greatly reduce the cost, the reason of surface treatment industryHigh frequency switching power supply一 The main circuitFrom the input and output of dc exchange network, including:1The whole the effect is input filt

8、er: there will be the clutter power filter, also hindered the feedback to produce clutter of public power.2And rectification and filtering: ac power grid directly to a smooth dc rectification, in order to the next level.3Inverter: after rectifying dc into high frequency alternating, this is the core

9、 part of switch power supply, the higher the frequency volume, and weight and output power than smaller.4And output rectifier and filtering: according to provide reliable, load of the dc power supply.Second control circuit ：On one hand, the sample from the output terminal with setting standards, and

10、 then compared to control the inverter, change the frequency or pulse width, achieve output stability, on the other hand, according to the test circuit, the information provided by differential protection circuit, control circuit of various protection measures.Third detection circuit：In addition to

11、providing protection circuit is running in the various parameters but also provide various display meter data.Four, the auxiliary powerTo provide all the different requirements of a circuit switching voltage control principleSwitch to certain time interval K repeatedly through and disconnect the swi

12、tch, the power input, K E through switch and filter circuits provide load RL, throughout the switch power load during to provide energy, E, When the switch, input power disconnection K E will provide energy interrupted. Visible, to provide the energy input power load is intermittent, for the load ca

13、n be provided for energy switching power supply, a storage device, must be in switch will be part of the energy stored in the switch to load, release. In the figure, the inductance and capacitance C2 and diode L circuit, is composed of D this function. Inductance used in storing energy, l., and stor

14、ed in the switch of energy through the diode inductance L D, released to load get steady and continuous energy, because diode D make continuous load current, so called free-wheeling diode. In EAB average voltage between AB says: under the type used:EAB = TON/T * EFor every TON of time, the switch to

15、 switch the huge T works cycle (i.e. switch time TON TOFF cut-off time and sum).By type, changing switch time and work cycle, the ratio between the average voltage AB also changed, therefore, with the load and the input voltage changes automatically adjusted TON and the proportion of T he can make t

16、he output voltage V0 remain unchanged. Change through Time and work cycle TON of pulse that changing proportion of this method, SHCH as "Time Ratio Control" (from Time, abbreviation for TRC).According to the control principle TRC have three ways:A Pulse Width Modulation (Pulse Width Modula

17、tion, the abbreviation for PWM)Switch is constant, by changing the pulse width to change the way SHCH.Second, Pulse Frequency, Pulse Modulation (some Modulation abbreviated PFM)The constant change of the pulse width, through the working frequency switches to change the way SHCH.Third, mix modulation

18、Conduction pulse width and switch jobs are not fixed frequency, each other can change the way, and it is more than two ways of mixed.High frequency switching power supply 1 don't need to increase speed switches can theoretically the switch loss to zero, and noise is smallThe development of switc

19、h powerSwitching power supply for has the advantages of small size, light weight, high efficiency, low calorific value and stable performance advantages and gradually replace traditional manufacturing technology of continuous work power, and widely used in electronic machine and equipment. In the 19

20、80s, the full realization of computer, the switching power supply complete computer. In the 1990s, switch power supply in electronics, electrical equipment, and home appliance field has been widely applied; switch power technology into rapid development.Switching voltage stabilizer adopts power semi

21、conductor as switch, through the control switch SHCH adjustment output voltage. In power transistors (GTR), for example, when a switch tube saturated conductivity, the collector and emitter on both ends of the pressure drop to zero, When the switch tube, the collector current deadline to zero. So th

22、e consumption, efficiency can be up to 70-95. While consumption also decrease. Radiator switching voltage stabilizer for grid voltage directly rectifier, filter, and then adjusted by adjusting voltage switch pipe, need not power transformer. In addition, switch frequency for dozens of KHZ, filter ca

23、pacitor, inductor value. Therefore switching power supply is light weight, small size, etc. In addition, due to the low consumption, low temperature; improve the stability and reliability of the machine. And on the grid adaptive capability has increased, the average power serial Manos tat allows for

24、 220 ± 10% fluctuate, but switching voltage stabilizer in voltage in a 110-260 volts range change, can obtain stable output voltage.The high frequency switching power supply is the development of technology innovation technology, high frequency of the benefit is that switching power supply devi

25、ce to miniaturization, and make an unprecedented power switch into a wide range of areas, especially in the high-tech fields of application, promote the high-tech products of miniaturization, light. Now on the market of switch power supply power tube with a bipolar transistor, switch frequency can r

26、each several KHZ, The switch power MOSFET using frequency conversion of hundreds of KHZ. To improve the switch frequency, must adopt high speed switching devices. For the power switch frequency than MHZ available resonant circuit this way of working is called resonant switching mode.It can greatly i

27、mprove switch speed, theoretically switch loss to zero, the noise is small, and it is to improve the working frequency of switch power. By way of resonant switching converter has practical level MHZ. Pursuit of switch power supply technical development trend and can be summarized in the following fo

28、ur aspects.A miniaturization, thin, light, high frequency switching power supply of - of volume, weight is mainly composed of storage devices (magnetic components and capacitance), so the miniaturization of switch power supply is essentially to minimize the volume of storage devices, In a certain ra

29、nge, the switch frequency, not only can effectively reduce capacitance and inductance and the size of the transformer, but also can restrain the interference, improve the dynamic performance of the system. Therefore, high frequency switching power is the main development direction.Second, high relia

30、bility - the use of switch power supply for a job than components ten times, thus increasing the reliability. From the Angle of life, capacitors, optical coupler and platoon devices such as life determines the communication power of life. So, from design, use less as far as possible, improve integra

31、tion. Such not only solved the reliability of complex, the circuit, also increases protection function, simplify the circuit improve MTBF.Third, low noise - one of switch power supply noise is. Simply pursuit of high frequency and noise also is met subsequently increased. The partial resonant conver

32、ting circuit technology, in principle on which can not only improve the frequency and can reduce the noise. So, as far as possible to reduce the noise influence of switch power supply is a development direction.Four, using computer aided design and control - USES the latest technology design CDD CAA

33、 and transformation of topology and the best parameters, make the switch power structure and the best condition. Jane, in the circuit into microcomputers detection and control, monitoring system, can form multi-function real-time detection, record and automatic alarm and etc.The development of switc

34、h power supply is and semiconductor devices and the development of magnetic components. The high frequency, need corresponding high-speed semiconductorA high-frequency electromagnetic with excellent performance. Development power MOSFET, IGBT etc, develop new high-speed device with low frequency mag

35、netic materials, improving the loss of magnetic components of the structure and the design method, enhances the filter capacitor dielectric constant and reduce its equivalent series resistor etc, to switch power miniaturization has produced a great impetus 高頻開關(guān)電源介紹簡介高頻開關(guān)電源(也稱為開關(guān)型整流器SMR)通過MOSFET或IGBT

36、的高頻工作，開關(guān)頻率一般控制在50-100kHz范圍內(nèi)，實現(xiàn)高效率和小型化。近幾年，開關(guān)整流器的功率容量不斷擴大，單機容量己從48V/12.5A、48V/20A擴大到48V/200A、48V/400A。 高頻開關(guān)電源是傳統(tǒng)整流器（硅整流器 ，可控硅整流器）的升級替代產(chǎn)品。高頻開關(guān)電源以使用方便，體積小，效率高，工作穩(wěn)定，鍍層細(xì)致等絕對的優(yōu)勢迅速占領(lǐng)市場。廣泛使用于電鍍，電解，氧化等表面處理行業(yè)，并得到新老客戶的一致好評。 產(chǎn)品特點：1本產(chǎn)品采用進口名牌元器件和國際先進的全橋逆變換流技術(shù)精密加工而成，使整機的性能穩(wěn)定，質(zhì)量更加可靠。2.流輸出波形為高頻方波，紋波系數(shù)大大主小于1%，可提高鍍數(shù)，拒

37、絕鈍化，增強鍍層表面的光澤度和鍍件暗角的鉆芯度。并可減少原材料的損耗，達(dá)到電鍍行業(yè)的各種特殊要求。 3.SFG系列高頻開關(guān)電源采用風(fēng)冷式設(shè)計，安裝方便。并配有遠(yuǎn)控裝置，操作簡單?？梢詭ж?fù)載開關(guān)機，減少調(diào)節(jié)的煩瑣程序。 4.體積小、重量輕，整機運用了全方位的防腐工藝制作，增強了產(chǎn)品的防腐蝕能力，延長了使用壽命。 5.高效，節(jié)能，工作效率達(dá)到90%以上，任意電壓電流比始終成線性匹配。省去了傳統(tǒng)整流器的調(diào)壓器和主變的損耗，節(jié)能在35%以上，大大的減輕了電鍍成本，實為表面處理行業(yè)最理智的選 高頻開關(guān)電源原理一、主電路從交流電網(wǎng)輸入、直流輸出的全過程，包括： 1、輸入濾波器：其作用是將電網(wǎng)存在的雜波過濾

38、，同時也阻礙本機產(chǎn)生的雜波反饋到公共電網(wǎng)。 2、整流與濾波：將電網(wǎng)交流電源直接整流為較平滑的直流電，以供下一級變換。 3、逆變：將整流后的直流電變?yōu)楦哳l交流電，這是高頻開關(guān)電源的核心部分，頻率越高，體積、重量與輸出功率之比越小。 4、輸出整流與濾波：根據(jù)負(fù)載需要，提供穩(wěn)定可靠的直流電源。 二、控制電路一方面從輸出端取樣，經(jīng)與設(shè)定標(biāo)準(zhǔn)進行比較，然后去控制逆變器，改變其頻率或脈寬，達(dá)到輸出穩(wěn)定，另一方面，根據(jù)測試電路提供的資料，經(jīng)保護電路鑒別，提供控制電路對整機進行各種保護措施。三、檢測電路除了提供保護電路中正在運行中各種參數(shù)外，還提供各種顯示儀表資料。四、輔助電源提供所有單一電路的不同要求電源。

39、開關(guān)控制穩(wěn)壓原理開關(guān)K以一定的時間間隔重復(fù)地接通和斷開，在開關(guān)K接通時，輸入電源E通過開關(guān)K和濾波電路提供給負(fù)載RL，在整個開關(guān)接通期間，電源E向負(fù)載提供能量；當(dāng)開關(guān)K斷開時，輸入電源E便中斷了能量的提供。可見，輸入電源向負(fù)載提供能量是斷續(xù)的，為使負(fù)載能得到連續(xù)的能量提供，開關(guān)穩(wěn)壓電源必須要有一套儲能裝置，在開關(guān)接通時將一部份能量儲存起來，在開關(guān)斷開時，向負(fù)載釋放。圖中，由電感L、電容C2和二極管D組成的電路，就具有這種功能。電感L用以儲存能量，在開關(guān)斷開時，儲存在電感L中的能量通過二極管D釋放給負(fù)載，使負(fù)載得到連續(xù)而穩(wěn)定的能量，因二極管D使負(fù)載電流連續(xù)不斷，所以稱為續(xù)流二極管。在AB間的電壓

40、平均值EAB可用下式表示：EAB=TON/T*E式中TON為開關(guān)每次接通的時間，T為開關(guān)通斷的工作周期（即開關(guān)接通時間TON和關(guān)斷時間TOFF之和）。由式可知，改變開關(guān)接通時間和工作周期的比例，AB間電壓的平均值也隨之改變，因此，隨著負(fù)載及輸入電源電壓的變化自動調(diào)整TON和T的比例便能使輸出電壓V0維持不變。改變接通時間TON和工作周期比例亦即改變脈沖的占空比，這種方法稱為“時間比率控制”（Time Ratio Control,縮寫為TRC）。按TRC控制原理，有三種方式： 一、脈沖寬度調(diào)制（Pulse Width Modulation,縮寫為PWM） 開關(guān)周期恒定，通過改變脈沖寬度來改變占空比的方式。 二、脈沖頻率調(diào)制（Pulse Frequency Modulation,縮寫為PFM） 導(dǎo)通脈沖寬度恒定，通過改變開關(guān)工作頻率來改變占空比的方式。 三、混合調(diào)制 導(dǎo)通脈沖寬度和開關(guān)工作頻率均不固定，彼此都能改變的方式，它是以上二種方式的混合。 高頻開關(guān)電源1不需要大幅度提高開關(guān)速度就可以在理論上把開關(guān)損耗降到零，而且噪聲也小開關(guān)電源的發(fā)展開關(guān)電源因具有體積小、重量輕、效率高、發(fā)熱量低、性能穩(wěn)定等優(yōu)點而逐漸取代傳統(tǒng)技術(shù)制造的連續(xù)工作電源，并廣泛應(yīng)用于電子整機與設(shè)備中。20世紀(jì)80年代，計算機全面實現(xiàn)了開關(guān)電源化，率先完成計算機的電源換代。20世紀(jì)90年代，開關(guān)電