零電點 的英文怎麼說

中文拼音 [língdiàndiǎn]
零電點 英文
point of zero charge
  • 零 : Ⅰ數詞1 （零數） zero2 （數的空位） zero sign （0）; nought 3 （表示沒有數量;無） nil; nought 4 （...
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  1. If the node is at, or near to, ground then a grounded guard ring will be appropriate, if it is at some other potential it may be necessary to use a high input impedance buffer amplifier, with its input connected to the node, to force the guard ring to the node potential

    如果被保護的節點的電位是（或接近）零電位，採用地線保護環最為合適；如果節點電位是其他值，那麼可以用高輸入阻抗放大器組成緩沖器，輸入端連接該節點，輸出端連接保護環。
  2. High - frequency link power converters are receiving increasing attention. when the input frequency of ac - ac converter is quite high, such as 20khz or above, in order to make sure the converter switching action is restricted to the zero crossing point of the link voltage, the switching cycle becomes discrete pulse spectrums, however, the conventional pwm converters are ruled out because they would fail either to the efficiency or the low - distortion criteria

    當交-交變頻器的輸入頻率非常高，通常為20khz時，為了在零電壓條件下實現逆變器開關管的通斷，變換器的開關時刻必須選擇在高頻交流電壓脈沖為零時，這意味著變換器開關時刻在時間軸上成為不連續的點，而常規的硬開關pwm變換器是將開關時刻選擇在任意時刻。
  3. Zero - voltage turn - on and zero - voltage turn - off in lagging arm and leading arm of soft - switching topology, working waveform of power transformer and process of rectifier and transition are presented in detail. the influence of resonant inductance of the power transformer, resonant capacitor and variation of load to the process of soft - switching are given

    主要對軟開關滯后橋臂和超前橋臂的零電壓開通、關斷過程，功率變壓器的工作波形及整流換流過程進行了詳細的模擬分析，並重點討論了逆變器的諧振電感、諧振電容以及負載變化對軟開關過程的影響。
  4. A novel cycloconverter - rype three - phase hf link inverter topology for soft - switching based on phase - shifted full - bridge mode is proposed, whose main advantages are as follows : under the conditions of d < i < and overlap - d, the switches of the leading leg are turned on at zvs and the switches of the lagging leg are turned off at zcs and all switches of the cycloconverter circuit are commutated in the overlapping mode in the interval of zero voltage, which makes the circuit realize soft switching to the utmost extent and reliably solve the problem of peak voltage caused by the storing energy of leakage inductance of hf transformer

    論文提出一種新型移相全橋軟開關周波變流型三相高頻鏈逆變器，電路的主要優點是：前級移相全橋的移相角控制在_ d _ i和_ （ overlap ） - _ d條件下，超前橋臂零電壓開通，滯后橋臂零電流關斷，並使周波變流器所有開關在零電壓期間重疊換相，使整機開關最大程度地實現了軟開關，並可靠解決了高頻變壓器漏感儲能引起的電壓尖峰問題。
  5. By compared with the simulation results and the experiment results, we come to the conclusions that : ( 1 ) circuit with assistant network can widen soft - switching extent in lagging arm, reduces duty - cycle loss on the secondary, diminishes switching dissipation of inverter spot - welding power source. ( 2 ) the range of resonant capacitor, the important factor to soft - switching process, not only affects zero - voltage turn - off of power switches, but also affects the range of zero - voltage turn - on of power switches. so resonant capacitors must be considered according to many aspects ; ( 3 ) it easily fulfils soft - switching condition in lagging arm as leakage inductance of power transformer increases, but bigger leakage inductance of power transformer increases opening dissipation of transformer and decreases efficiency of soft - switching inverter power source

    通過模擬結果與軟開關點焊逆變器試驗結果的對比分析，得到了如下主要結論：採用輔助網路可以完全拓寬全橋軟開關逆變器的滯后橋臂軟開關范圍，減小了次級占空比丟失，降低了逆變電阻點焊電源的開關損耗；諧振電容是影響軟開關工作狀態的重要因素，其大小不僅影響開關管的零電壓關斷，同時也影響開關管的零電壓開通范圍，因此，諧振電容應該綜合考慮；功率變壓器漏感越大，越容易滿足滯后橋臂的軟開關條件，但是大的漏感也使變壓器的通態損耗增加，降低了軟開關逆變器的效率。
  6. The thesis has done the widespread investigation and study to the domestic and foreign ’ s technologies of analogy low voltage and low power, and analyzes the principles of work, merts and shortcomings of these technologies, based on the absorption of these technologies, it designs a 1. 5v low power rail - to - rail cmos operational amplifier. when designing input stage, in order to enable the input common mode voltage range to achieve rail - to - rail, it does not use the traditional differential input pair, but use the nmos tube and the pmos tube parallel supplementary differential input pair to the structure, and uses the proportional current mirror technology to realize the constant transconductance of input stage. in the middle gain stage design, the current mirror load does not use the traditional standard cascode structure, but uses the low voltage, wide - swing casecode structure which is suitable to work in low voltage. when designing output stage, in order to enhance the efficiency, it uses the push - pull common source stage amplifier as the output stage, the output voltage swing basically reached rail - to - rail. the thesis changes the design of the traditional normal source based on the operational amplifier, uses the differential amplifier with current mirror load to design a normal current source. the normal current source provides the stable bias current and the bias voltage to the operational amplifier, so the stability of operational amplifier is guaranteed. the thesis uses the miller compensate technology with a adjusting zero resistance to compensate the operational amplifier

    本論文對國內外的模擬低電壓低功耗技術做了廣泛的調查研究，分析了這些技術的工作原理和優缺點，在吸收這些技術成果基礎上設計了一個1 . 5v低功耗軌至軌cmos運算放大器。在設計輸入級時，為了使輸入共模電壓范圍達到軌至軌，不是採用傳統的差動輸入結構，而是採用了nmos管和pmos管並聯的互補差動輸入對結構，並採用成比例的電流鏡技術實現了輸入級跨導的恆定;在中間增益級設計中，電流鏡負載並不是採用傳統的標準共源共柵結構，而是採用了適合在低壓工作的低壓寬擺幅共源共柵結構;在輸出級設計時，為了提高效率，採用了推挽共源級放大器作為輸出級，輸出電壓擺幅基本上達到了軌至軌;本論文改變傳統基準源基於運放的設計，採用了帶電流鏡負載的差分放大器設計了一個基準電流源，給運放提供穩定的偏置電流和偏置電壓，保證了運放的穩定性;並採用了帶調零電阻的密勒補償技術對運放進行頻率補償。
  7. Determine zero point of electric potential and iis calculation in static electric field

    靜電場中零電勢點的確定和電勢的計算
  8. The principle and application of zero current switching boost pfc circuit are given. by introducing the development of ac / dc module with pfc the key techniques of the module are stressed on the engineering design. some problems are resolved such as the module is so small that spread the hot difficulty

    從理論上分析和研究了零電流開關升壓式pfc電路的原理和應用，並結合250w帶pfc電路ac dc模塊的研製，從工程設計角度重點闡述了該模塊的關鍵技術，解決了模塊體積小、散熱困難及工藝等方面的難題。
  9. Firstly, the basic theory of full - bridge phase - shift zvs pwm converters are expatiated and another three kinds of circuits of full - bridge phase - shift zvs pwm converters are discussed. there are four kinds of problems which are emphasized : how to expand the zvs range ; how to reduce the circulation in the primary side of the transformer in order to minimize the on state losses ; how to decrease the loss of effective duty circle and how to eliminate the parasitic oscillation of the output rectifiers

    本文首先分析了基本的全橋移相zvsdc dc變換器的工作原理，為解決滯后橋臂不易實現零電壓開關（ zvs ）的情況，討論了另外三種全橋移相zvsdc dc變換器的電路拓撲，重點分析並解決了四個方面的問題：如何擴大zvs的負載范圍；減小變壓器原邊環流，降低變換器系統通態損耗；減少變壓器次邊有效占空比丟失；消除輸出整流二極體的寄生振蕩。
  10. These years more and more emphasize have been focused soft - switching control in phase - shifted zvs pwm full - bridge dc / dc converter and more research need to be made. the principles of phase - shifted zvs pwm full - bridge converter are described and analyzed

    基於移相控制的零電壓脈寬調制dc - dc全橋變換器是軟開關控制的一個研究熱點，還有許多理論問題需要研究。
  11. A point considered to be at nominal zero potential and to which all other potentials in the circuit are referred, often, but not always, connected to the actual surface of the earth ; as a verb to connect to a ground. also called earth

    電路中的一個參考點，該點電位作為標稱的零電位，其它所有電位均相對于該點而定。經常，但並非總是，將該點直接連接到地。作為動詞，指連接到地線上的過程，也稱作接地。
  12. The last part is the result of the simulation and experiments in detail. compared with the traditional chopper, the novel chopper has its particular excellence, though we can find some shortage in it

    盡管新型的零電壓軟開關斬波器還存在著一定的不足，但是相對于傳統的硬開關斬波器，有其自身獨特的優點。
  13. This feature is used to separate amino acids for analysis by chromatography and other methods

    每個氨基酸都有自己的等電點，等電點的條件是凈電荷為零。
  14. Traditional direct torque control uses two value torque regulator which makes zero voltage vector work long and make flux shape bad seriously and makes response time long when the speed of induction motor is very low or drops down quickly. in order to solve this problem the thesis puts forward a new way to use three - value torque regulator, when the motor speed is very low or drops down quickly, the contrary voltage vector is used instead of zero voltage vector and the between the stator flux and rotor flux is reduced quickly so that torque is reduced quickly and response time becomes shorter

    為此，本論文提出三點式轉矩調節，這樣當電機低速運轉或給定轉速突降時，不是加零電壓矢量，而是加反方向的電壓矢量，使定子磁鏈與轉子磁鏈之間的夾角迅速減小，從而使電磁轉矩也迅速減小，大大減小了調速時間，同時磁鏈值仍然保持基本恆定，輸出比較穩定的電磁轉矩，這在電機制動過程中非常有用。
  15. A topology of asymmetrical half bridge soft switching is researched in this thesis, which has inherent zero voltage switching ( zvs ) capability and thus potentially higher efficiency by its resonating of the leakage of power transformer with the parasitic capacitances of the power mosft switches, whereas it does n ' t raise the expense of the converter these studies in the thesis have been done as follows : ( 1 ) the topology of asymmetrical half bridge is introduced, and its principle and the relation of duty cycle and input voltage and output voltage discussed, the method of eliminating the deflection magnetism is also brought forward

    雖然，軟開關技術能夠實現功率變換器的小型化、模塊化等，但是，電路變得更加復雜，使得中小功率的變換器的成本增加，往往不利於商業競爭。本文研究了一種零電壓的不對稱半橋拓撲結構，它可以在不增加電路成本的基礎上，利用電路自身的特點，實現軟開關。本文所做的主要工作如下： （ 1 ）對不對稱半橋主電路工作原理進行分析，給出了占空比與輸出電壓、輸入電壓的關系以及消除變壓器偏磁的方法。
  16. Serial - parallel combined two - transistor forward converter is presented for high input voltage and high power application, and the operation principle of the topology is analyzed in this paper. all switches are turned off with zero voltage switching, and the two switches of them are turned on with zero current and zero voltage switching. the difference of input capacitances, conducting voltage drop of switches, duty cycle and windings of the transformer of the combined converter influences the voltage balance of the input capacitors

    本文介紹了雙管正激變換器的兩種穩定工作狀態，詳細分析了帶lcd無損箝位網路的並?並組合式雙管正激變換器的工作原理，該組合式變換器中的開關管實現了零電壓關斷，並介紹了該電路拓撲的特點和lcd網路參數設計，採用pspice軟體進行了模擬和分析，最後，研製出一臺2 . 3kw樣機。
  17. The realization of shift - phase pwm control with zero - voltage and high speed, large power drive circuit is emphatically solved

    重點解決了零電壓開關的移相pwm控制策略的實現、高速大功率驅動電路的實現等幾個難點問題。
  18. The following is the main point : based on the operation principle of the ps - fb - zvs - pwm dc / dc converter, the thesis researches the transient operation of the ps - fb - zvs - pwm dc / dc converter with a saturable inductor, and comprises the characteristic between them, and verify theory analysis above by computer simulations

    本論文研究的主要內容如下：論文在分析移相控制零電壓開關全橋變換器工作原理的基礎上，對帶飽和電感的移相控制零電壓開關全橋變換器的暫態工作過程進行了研究，並對它們之間的特點進行對比，模擬驗證了上述理論分析。
  19. Using zero - pole method to research the frequency response of resonance circuit

    基於零極點分析法的諧振電路的頻率響應研究
  20. Electro - rheological fluids ( erf ) are smart materials, which are consist of unconductive matrix fluids and micro dielectric solids that disperse in it uniformly under zero electric field, er fluids are usually newtonian fluids, and change into bingham fluids in the presence of a strong external electric fluids

    在零電場下，電流變液表現為牛頓流體，在外加電場作用下，是一種賓漢流體，由於其具有在液體和固體之間進行快速可逆轉變的特點，因此在機電一體化控制、汽車、通用機械等領域有著廣泛應用前景。
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