起振電流 的英文怎麼說

中文拼音 [qǐzhèndiànliú]
起振電流 英文
starting oscillation current
  • 起 : 起Ⅰ動詞1 （站起; 坐起） rise; get up; stand up 2 （取出; 取走） draw out; remove; extract; pull 3...
  • 振 : 動詞1. （搖動; 揮動） shake; flap; wield 2. （奮起） brace up; rise with force and spirit
  • 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...
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 電流 : current; galvanic current; electric current; electricity; current flow電流保護裝置 current protec...
  1. The way of taking one nth out of capacitor ' s the first harmonic capacitive reactance as its nth harmonic impedance is verified whit the data from tang7c. according to the approximately estimating method, the first harmonic impedance of 220kv system is calculated. on the basis of the models, this paper gives the harmonic equivalent circuit of substation and gives the b ( n ) function of the harmonic time n. when the capacitors has different combination, b ( n ) ' s value will also change, with the inputting local measurement data, the paper studies the series and parallel resonance at the substation, and deduces that the reason the capacitor ' s fuse of tang6c is frequently interrupted is that its capacitor current contains a large number of 5th harmonics, and that the reason the discharging pt of tang7c capacitor being exploded is also that the 7th and 9th harmonic currents are amplified

    據此，對該站進行了串聯諧振分析和並聯諧振分析，並結合測試數據和有關變電站的運行記錄，指出了導致該站電容器湯6c頻繁燒保險的主要原因是5次諧波電流含量偏高，引起湯7c放電pt爆炸也是因為7次和9次諧波電流被放大。針對這些導致湯陰變電站補償電容器故障的原因，提出了相應的諧波治理措施，包括針對湯6c電容器5次諧波電流含量偏高的原因，提出了停運湯6c電容器或者通過把湯sc電容器的部分容量併入湯6c電容器（湯sc其餘部分停運）以增加湯6c諧波承受能力的措施;針對# 2變低壓側7次和9次諧波電流被放大的現象，提出了在湯7c電容器上加裝一定百分比的串聯電抗器的措施。
  2. Torsional interaction exists between hvdc converters and turbine - generators, and negative electrical damping provided by hvdc may cause subsynchronous oscillation ( sso ) that can lead to turbine - generator shaft failure and electrical instability at oscillation frequencies lower than the fundamental system frequency

    高壓直流輸電（ high - voltage - direct - current - - - - hvdc ）系統與臨近同步發電機組之間存在著扭振相互作用， hvdc的電氣負阻尼作用有可能引起機組在次同步頻率范圍的扭轉振蕩。
  3. The feed - back provided by the reflected electron beams reduce the start - up current and the start - up time in a vircator, while the existence of klystron cavity improves the extracting efficiency, hence the radial reflex klystron oscillator with virtual cathode combines the advantages of both devices, becomes a compact, efficient set

    利用虛陰極反射電子束對調制腔的正反饋，可以減小起振電流和起振時間，而且提高了微波產生效率。它是一種結構簡單，緊湊，不需要引導磁場的器件。
  4. The over - current relay works to protect oscillation tubes and rectifier, when the current exceeds its limits. frequency deviation caused by faulty operation is also prevented

    當電流超過限制值時，過負荷電流繼電器自動保護振蕩管和整流器，同時可以避免由不當操作所引起的頻率漂移。
  5. This dissertation focuses on how to develop a high performance damping mechanism based on multi - energy transitions, which is independent or little dependant with the viscoelasticity of polymer matrix. three sections are mainly included in this dissertation as follows : chlorinated polyethylene ( cpe ) / piezoelectric ceramic ( pzt ) / vapor grown carbon fiber ( vgcf ) composites ; cpe / 2, 2 ' - methylene - bis - ( 4 - methyl - 6 - cyclohexylphenol ) ( zkf ) / vgcf composites ; organic hybrids made from cpe and small molecules cpe / pzt / vgcf composites : the damping composites of multi - energy transitions mechanism were produced by mixing pzt and vgcf into cpe. in this system, the mechanical vibration energy that was transmitted to cpe was found to convert into joule ' s heat through conduction paths between vgcf in the polymer matrix, so the vibration fades away

    本論文主要包括三個方面的研究內容： ?氯化聚乙烯（ cpe ） /壓電陶瓷（ pzt ） /氣相生長碳纖維（ vgcf ）復合材料； ? cpe /雙[ （ 2 -羥基- 3 -環己基- 5 -甲基） -苯基]甲烷（ zkf ） / vgcf復合材料； ? cpe基有機小分子混雜型復合材料cpe / pzt / vgcf減振復合材料：利用壓電和導電填料填充高聚物基體，當復合材料受到機械振動時，通過高聚物基體將機械振動能傳遞到壓電陶瓷粒子上，利用壓電陶瓷的壓電效應，將機械能轉換成電能，則電流在導電粒子產生的迴路中流動，由於導電迴路具有一定的電阻，所以電能又轉變成熱能耗散掉，從而起到減振的目的。
  6. The optical activity resulting from the anisotropic attenuation of different linearly polarized light is considered, and the attenuation of linearly polarized light lies in the light reflection on the interface and the absorption in the er fluids

    考慮了電場作用下各向異性電流變液對入射線偏振光矢量不同振動方向的衰減不同而引起的旋光效應（電致旋光效應） 。
  7. The phenomenon of heavy turbine vibration which causes vibration of the workshop or even that of the dam in some hydroelectric power stations in china is presented

    摘要介紹了我國水電站混流式機組廠房某些工作區域內振動過大的現象，並不同程度地引起水電站廠房甚至大壩的振動。
  8. In order to measure the characteristics of such semiconductor optical amplifier, we adopted a set of measurement system. this measurement system can be used to measure the characteristics of all kinds of active or inactive optical passive components. such device presents good polarization insensitivity ( < 0. 9db ), wide 3db bandwidth ( > 33nm ) at 0 - 200ma and different input signal light wavelength and power, the maximum fiber - to - fiber gain of 10db, lossless operation current of 50 - 75ma for different input signal light wavelength and power, large extinction ratio ( > 50db ) and lower noise figure ( nf ) ( < 8db )

    與張瑞英博士一起，首次利用該種有源區結構制備出偏振不靈敏半導體光放大器，並在0 - 200ma注入電流范圍內獲得33nm的3db帶寬，在不同信號波長，不同信號功率0 - 200ma的注入電流范圍內，偏振相關損耗均《 0 . 9db ，在耦合差損為7db / facet的條件下，最大fiber - to - fiher增益達10db ，無損操作電流為50 - 70ma ，消光比達50db以上，而噪聲指數則低於8db ，最小可達4 . 6db 。
  9. The current source plays an important part in the performance of the oscillator. with the help of the voltage reference, we design a constant current source which does not vary with the temperature 、 the voltage source and the process

    由於充放電電流對弛張振蕩器的性能有很大的影響，因此本文把基準電壓源結合在一起設計出一個受溫度、電源電壓、工藝條件影響很小的基準電流參考源。
  10. Due to applying double beams, the velocity spread is lower because of smaller influence of space charge compared with single beam mig. in the interaction region this beam is easy to start oscillation and reject mode competition effectively

    與單注磁控注入槍相比，雙注槍可以提供速度零散小、高束流的電子注，在互作用區更容易起振，且能更好的抑制模式競爭。
  11. The results show that the output power decreases with the increase of the diode voltage in the range of 330 ~ 425kv. the input current exist a start value and also an optimum one. they are in the range of 20 ~ 25ka and 28 - 31ka, respectively

    結果表明，在33okv ~ 425kv范圍內，微波功率隨二極體電壓增大而減小; rtto存在起振電流和最佳電流，其值分別在20 ~ 25ka和28 ~ 3ika范圍。
  12. The simulation results show that to start the oscillation, the length of the resonance cavity must be well matched with the radial span of the cavity ; mismatch of them will greatly affect the microwave development ; the output power of the microwave in rtto is affected by the microwave mode obviously. under the same conditions, the output power for temooi mode is the highest, and its start and saturation time of oscillation are the shortest. the results also show that the output power will decrease with the increase of the size of the extract window ; the operating state of rtto has great close relationship with the operating current, and there exists an optimum current value

    結果表明，束電壓一定時，諧振腔腔長和徑向間距必須良好匹配微波才能起振，匹配不佳會極大地影響微波產生；微波模式對微波產生功率影響很大，同等條件下， tem _ （ 001 ）模式的微波功率最高，起振時間和飽和時間最短；微波輸出功率隨提取口的增大而減小； rtto工作狀態與工作電流的大小關系密切，存在一個最佳工作電流值。
  13. In order to decreasing hydraulic impact, the principle is analyzed to eliminate or increase hydraulic impact by means of changing eccentric lump structure to cut down the inertia force of starting, changing the pressure of pilot electromagnetic relief valve and changing the parameters of accumulator

    為了減小液壓沖擊，本文分析了用改變偏心塊結構減小起振慣性力的方式、用改變先導式電磁溢流閥溢流壓力方式和改變蓄能器參數方式消除或減小液壓沖擊的原理。
  14. Since the concept of superlattice was proposed, vertical transport in superlattice has been investigated widely. the electric field domains and current self - oscillations which result from sequential resonant tunneling between different subbands of the superlattice are very significant phenomena. such kind of oscillation can be uesd to make tunable microwave oscillaors. in this thesis, low temperature transport problem, especially the formation of field domain and the condition of current self - oscillations in doped gaas / alas superlattice with weak coupling are investigated thoroughly and also by combining the macroscopic model with the microscopic one., the voltage - current characteristic and the current oscillation are simulated. the calculated result is nearly consistent with the experimental data

    由超晶格中子能級之間的順序多阱共振隧穿引起的電場疇及電流自維持振蕩現象是其中的一個非常有意義的分支，該現象可用來製作電壓調諧微波振蕩器。本論文對弱耦合摻雜gaaa alas超晶格中的縱向輸運特別是針對低溫下的場疇的形成和固定偏壓下電流自維持振蕩產生的條件進行了深入的探討，並結合宏觀模型和微觀模型對超晶格在時變電壓作用下的電壓-電流特性以及固定偏壓作用下的電流特性進行了模擬計算。
  15. However these converters become more complicate. phase - shift zvs technique has been used in bidirectional dc / dc converters since it can realize zvs for all switches without auxiliary switches. however when the amplitude of input voltage is not matched with that of output voltage, the current stresses and rms currents of the converters become higher, in addition the converters can not achieve zvs under light - load condition

    諧振、準諧振或多諧振技術方案，變換器的電壓電流應力較高，變頻控制增加了濾波器設計的難度；能量緩沖吸收電路或有源鉗位電路方案，由於需要增加多個額外輔助元件，增加了變換器的復雜性；全橋相移技術方案，由於主電路無需增加額外元件，只需利用相移控制，即可實現軟開關，因此引起關注。
  16. So lead to their polarization behavior not as good as edge lasers. the paper researched the polarization of vcsel theoretically and experimentally, the main work is as follows : part. without consideration the applied strain and temperature, we resolved numerically the maxwell - bloch equation through four - energy level polarized dynamic model

    通過四能級偏振動力學模型，在不考慮外加應變以及溫度的前提下，對maxwell - bloch方程進行數值求解，研究了隨著注入電流以及各向異性的變化引起的vcsel的出射偏振光的強度、頻率和相位變化。
  17. With the model, direct starting, increasing voltage starting and current limit starting are studied and compared. the results of simulation suggest that current limit starting has good performance in starting current and torque limit and their oscillation restraint

    從模擬結果可以看出，無論在減小起動電流沖擊、減小起動轉矩沖擊，還是在抑制電機電流、轉矩振蕩方面，採用限流軟起動方式都表現出良好的性能。
  18. The second, as a novel gyrodevice the two - beam coaxial gyrotron which was proposed by professor liu shenggang is analysed by kinetic theory of ecrm. general dispersion equation for ecrm and expressions for the interaction power and the starting current are derived in the case of eccentricity of the electron beam in the coaxial cavity

    其次，基於迴旋動力學理論，對劉盛綱院士提出的一種新型迴旋管-雙電子注同軸腔迴旋管進行了初步的線性理論研究分析;通過在迴旋中心坐標系中求解線性伏拉索夫方程，推導出了注波互作用方程、互作用功率、起振電流表達式。
  19. Using the optimization control method of the moderm control theories, the time - varying control and output - feedback control the authors study the variable structure active control over the rotor vibration with sma, especially the method of restraining the transient response of the rotor vibration. they get the rule of the optimum control force and the optimum control electric current and discuss the influence of variable stiffness on the total system stiffness through analyzing the structure of sma controller. they also indicate the shortcoming of the orthodox design method of a controller, especially the imbalance phenomenon caused by the lack of the rod stability, and propose a new method for improvement and items which ought to be paid attention to in the design stage

    運用現代控制理論中的最優控制方法，引入時變控制和輸出反饋控制，研究利用形狀記憶合金對轉子振動進行變結構主動控制，特別是抑制轉子振動的瞬態響應的方法，得出了最優控制力和控制電流的強度變化規律；通過分析形狀記憶合金動作器的結構，探討了變剛度支承對系統總體剛度的影響，指出了傳統設計方法的不足之處，特別是由壓桿穩定性不足引起的失穩現象，並提出了改進的方法和在設計中值得注意的問題
  20. At different position and current, the normal force is calculated. this will be used to determine the force harmonics and hence to calculate the vibration resulting from the normal forces. the caculation results are very helpful to the reseach of noise and vibration of doubly salient motors

    本文利用vfem對雙凸極電機二維電磁性能進行分析，並對不同轉子位置、不同繞組電流情況下的定轉子徑向磁吸力進行了詳細計算，從而可以進一步研究徑向力所引起的振動響應，這對于雙凸極電機噪聲和振動的研究有非常重要的實際意義。
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