高壓二極體 的英文怎麼說
中文拼音 [gāoyāèrjítǐ]
高壓二極體
英文
high-voltage diode-
Mit ' s galvactivator is a fingerless glove rigged with an led display that glows bright white when your stress hormones go into high gear
由麻省理工學院研製的電流器是一種無指手套,它配有發光的二極體顯示器。當你的壓力荷爾蒙達到高位時,顯示器會發出明亮的白光。Conventional hard switching technology has several flaws below : on and off loss, inductive off, capacitive on and diode recover problems. comparing with it, the loss of on and off decreases markedly, as the switches are on and off in zero voltage or zero current cases. and also the size of converter becomes smaller because of the higher of switching frequency
傳統硬開關技術由於存在開通關斷損耗大、感性關斷、容性開通、二極體反向恢復等問題,與之相比,軟開關技術在零電壓或零電流條件下導通,開關損耗明顯降低,加上開關頻率的提高使得變換器的體積得以減小,這也是軟開關技術受到青睞的原因。Thirdly, the relative theories of the limiter and rectifier are studied. in order to make the passive responder work stably under the conditions of large dynamic range of the receiving power and the high efficiency requirement, a two - stage limiter circuit and a voltage - doubler rectifier circuit with several diodes parallel are developed
3 ,對應答器地面裝置中的能量轉換電路進行了研究,針對應答器地面裝置接收到的載波功率具有大動態范圍的特點以及系統能量轉換的高效率要求,設計了一種兩級級聯二極體限幅電路和多管並聯的倍壓整流電路。In addition, a way of by using the series of circuits instead of series of devices is adapted to halve the voltage stress of the secondary diodes
並且通過改進副邊結構,將副邊二極體器件的串聯變為電路的串聯,能夠實現高頻二極體的動態均壓。The goal of this paper is, by serial / parallel combination technique of two - transistos forward converters ( ttfcs ), to keep the merits of the ttfc, and to overcome the shortages of it. the interleaving technique is adopted, while in combining ttfcs. the interleaving technique lowers the net ripple amplitude and raises the effective ripple frequency of the overall converter without increasing switching losses or device stresses
組合式雙管正激變換器由雙管正激變換器串並聯構成,應用交錯控制策略,在保留雙管正激變換器功率開關管電壓應力低和可靠性高的優點同時,克服了等效占空比小、副邊二極體電壓應力高、輸出電流脈動大等缺點。The following is the main works and conclusions of this thesis. the novel upfc needs high power rate because it is generally used in high voltage transmission lines. after studied high - power converters and the literatures of upfc, the main circuit topology of novel upfc base on diode - clamping multilevel inverter is presented and the principle of using novel upfc to eliminate zero sequence and negative sequence currents is analyzed
本文所做的主要工作及得出的主要結論如下:由於upfc一般用於高壓輸電線,其功率等級要求很高,在綜合研究大功率變換器和upfc現有文獻的基礎上,提出了基於二極體箝位多電平變換器的新型upfc的主電路拓撲,分析了用其來濾出高壓輸電線非全相運行時所產生的零序和負序電流的原理。One is that the operation duty cycle can not be larger than 50 % because of the requirement for the transformer resetting. as a result, the voltage stress of the secondary diode is high, which limits the usage of dfc in high output voltage application
但由於變壓器磁芯復位的需要,其工作占空比必須小於50 ,從而造成占空比利用率不高,變壓器副邊電壓高,副邊高頻整流二極體的電壓應力大。The clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty cycle loss. the operation principle of the improved converter and the comparison with the original converter are analyzed in this paper. the effect of the blocking capacitor in series with the transformer or resonant inductance is discussed, and a best scheme is determined
本文將諧振電感和變壓器交換位置,使變壓器與滯后橋臂相連,這樣箝位二極體在一個開關周期中只導通一次,同時零狀態時諧振電感電流較小,有利於提高變換效率和減小占空比丟失,本文分析改進后變換器的工作原理,並與改進前的變換器進行對比,討論隔直電容在不同位置對變換器工作的影響,確定一種最佳工程方案。Power fast recovery diode, which is abbreviated to frd, is one of the key devices in modern power electronic technology. in the power electronic circuits, frd is usually parallel connected with three - end power devices as their freewheeling diode
高壓功率快恢復二極體(以下簡稱frd )廣泛地應用於電力電子電路中,作為續流二極體與三端功率器件並聯使用,是現代電力電子技術中的關鍵器件。Diode switches or voltage controlled varactors implement dual - band resonators such that they can offer low impedance at the second harmonic of each frequency band, while, in some cases, presenting high impedance at the fundamental frequency as an rf choke circuit
利用二極體開關或電壓控制變容器實施雙頻共振器以提供在雙頻操作中每一個頻段之二階諧波的低阻抗,同時在一些實施例里也提供主頻段的高阻抗、兼具有射頻阻塞電路作用。When the signal source of an op - amp contains an energizing voltage which is much higher than the op - amp supply it is common to use a diode and a current limiting resistor to protect the op - amp in the event of a sensor short - circuit
為了防止信號源竄入高壓損壞放大器,常見的做法是在放大器輸入端到放大器電源間串接一個二極體,並且在放大器輸入端串接一個限流電阻。The way to shield the back current of foilless diode is analyzed by karat program. the surface flashover is raised from 300kv to 400kv when the shield is added in experiments
使用karat程序分析了無箔二極體的迴流屏蔽方法,實驗中發現加屏蔽環后表面閃絡電壓從300kv提高到了400kv 。Based on comparison between the parallel - parallel and parallel - serial combination ttfc, a novel two - transistor forward converter with parallel - serial / serial combination is proposed. this converter reduces greatly the current overshoot of the primary side switches and the voltage overshoot of the rectifying diodes. moreover, the size and weight of the converter can also be reduced by interleaving technique and increasing frequency
本文在對並-串型和並-並型雙管正激組合變換器進行了詳細比較研究的基礎上,提出了一種新型並-串串型雙管正激組合變換器,該組合變換器可以大大減小原邊開關管的電流應力和副邊整流電路中二極體的電壓應力;通過交錯控制及提高開關頻率,大大提高了變換器的功率密度。How to further improve the luminous efficiency, brightness, life length and operating voltage of organic light - emitting diodes ( oleds ) is still in research
如何進一步提高有機發光二極體( oled )的發光效率、提高發光亮度、延長器件壽命、降低工作電壓還處于不斷研究中。Compare to the operation under the dcm mode, the power switches of the inverter under the ccm mode has lower peak current and rms current, so the efficiency can be improved. as the synchronous rectification strategy can reduce the conduction losses of the rectifier, and also due to the zvs realization of all synchronous rectifiers, the
採用非互補導通控制,在ccm模式下由於功率管電流峰值和有效值的減小,逆變器變換效率較dcm模式下有所提高;另外, ccm模式下,反激逆變器採用同步整流控制,減小了整流二極體的導通壓降,並且電路中同步整流管可實現零電壓開通。A new type high efficiency synchronous step - up dc / dc converter for hand - held device is designed in this thesis. it works in the pfm ( pulse frequency modulating ) mode, and its switching frequency can up to 500 khz. it offers a built - in synchronous rectifier that reduces size and cost by eliminating the need for an external schottky diode and improves overall efficiency by minimizing losses
本文設計了一種用於移動電子設備的高效同步整流的dc / dc升壓晶元,該晶元採用pfm (脈沖周期調制)調制方式,工作頻率最高可達500khz ,內部集成功率管作為同步整流管,代替傳統的肖特基二極體,導通電阻僅有0 . 4For the pin diode, its major transient behaviors are forward voltage recovery and reverse current recovery. this dissertation describes these performances by lumped - charge approach, and then developed an improved lumped - charge model for pin diode and a corresponding parameter extraction approach, which can reduce parameter measurement and enhance parameter accuracy
Pin二極體中主要的瞬態現象是正向電壓恢復和反向電流恢復,本文採用集總電荷的方法描述了它的動、靜態特性,提出了改進的集總電荷的pin二極體高頻模型,同時提出了改進的曲線擬合模型參數抽取方法,減少了所需的參數測量實驗並提高了參數抽取的精度。Shenzhen luguang electronic technology co., ltd is a high - new electronic technical enterprise, which is specializing in r & d, manufacturing, and selling of various piezoelectric materials, such as piezoelectric frequency components, diodes, transistors, digital television receiver, wireless controller, etc
深圳市魯光電子科技有限公司,是一家專業研發、生產、銷售各種壓電陶瓷材料,壓電陶瓷晶體頻率元件?二極體?三極體?提供各種電路設計,模組化設計,無線控制器等各種電子產品的供應和技術應用的高新企業。Excitation at 493nm, the emission peaks of pff5 in chloroform solution is 540nm and 580nm. using pff5 as the emitter, an efficiency single layer led has been fabricated. 3
利用pff5作為發射層,研製單層高效的聚合物發光二極體,研究器件的伏安特性、電壓亮度特性和電致發光光譜。Multilevel ( ml ) converters have been attracting more and more attention because they have the advantages such as low voltage stresses for power devices and reduced harmonic content of the voltage waveform. they are very suitable for high voltage and high power conversion applications
多電平直流變換器由於其開關管及二極體的電壓應力低、輸出電壓諧波含量小等優點,特別適合於高電壓大功率的應用場合,近年來正受到越來越多的關注。分享友人