中英文翻譯資料----開關(guān)電源發(fā)展軌跡-免費(fèi)閱讀
【正文】 如：用一級(jí) AC－ DC 開關(guān)變換器實(shí)現(xiàn)穩(wěn)壓或穩(wěn)流，并具有功率因數(shù)校正功能，稱為單管單級(jí)（ SingleSwitch Single Stage）或 4S 高功率因數(shù) AC－ DC 開關(guān)變換器；輸出 1V， 50A的低電壓大電流 DC－ DC 變換器，又稱電壓調(diào)節(jié)模塊 VRM，以適應(yīng)下一代超快速微處理器供電的需求；多通道（ Multi－ Channel 或 Multi－ Phase） DC－ DC 開關(guān)變換器；網(wǎng)絡(luò)服務(wù)器（ Server）的開關(guān)電源刊可攜帶式電子設(shè)備的高頻開關(guān)電源等。 （ APFC）的開發(fā)，提高了 AC－ DC開關(guān)電源功率因數(shù)。 PWM 開關(guān)電源按硬開關(guān)模式工作（開／關(guān)過程中電壓卜降／上升和電流上升／下降波形有交疊），因而開關(guān)損耗大。充分顯示了中國電源技術(shù)人員的聰明才智和艱苦奮斗的創(chuàng)業(yè)精神。特點(diǎn)是負(fù)載大范圍變化頻繁，工作環(huán)境惡劣。東方紅三號(hào)通信衛(wèi)星、風(fēng)云一號(hào)、二號(hào)氣象衛(wèi)星均應(yīng)用了開關(guān)電源。 此外要求開關(guān)電源效率要更高，性能更好，可靠性更高等。 Lowcost, low output voltage (≤ 3 V。s switching power supply from China39。s history of the development process of switching power supply can understand the international development of a switching power supply side, although generally speaking, China39。 AC input with a few highpower, etc. In the next five years will continue along these directions. Main technical marks from a technical perspective, for several decades to promote switching power supply performance and constantly improve the technological level This should mark is: 1. A new highfrequency power semiconductor devices to achieve the development of highfrequency switching power supply may have. IGBT such as power MOSFET and has been fully replace the power transistor and SCR, so that small and mediumsized switch power 下作 Frequency of up to 400 kHZ (ACDC) and 1 MHZ (DCDC) level. Ultrafast restore power diode, MOSF ET asked further rectification technology for the development of efficient lowvoltage output (for example, 3 V) switching power supply for a possible . Are now exploring the development of highperformance high temperature carbonation power to block conductor devices 2. Softswitch technology enables efficient highfrequency converter with the realization may be. PWM switching power supply switchmode by hard work (on / off process BU voltage drop / rise and the current rise / fall waveform is overlap), thus the switching losses. Highfrequency switching power supply can reduce the volume of weight, but switching losses are greater (power and frequency is directly proportional). So we must Switching on power than / current wave of cross more technology, the socalled zerovoltage (ZVS) / the current (ZCS) switching technology, or softswitch technology (as opposed to PWM switching technology in terms of hardware), the small softswitching power supply efficiency Can be increased to 80 a 85 per cent. 1970s, switching power supply market was softswitch technology laid the foundation. After the new softswitch technology will continue to emerge, such as the quasiresonant (1980s) fullbridge phaseshift ZVSPWM, constant frequency ZVS PWM/ZCSPWM (80 in the late) ZVSPWM active clamp。 我國開關(guān)電源歷程 從我國開關(guān)電
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