磁通勢 的英文怎麼說

中文拼音 [cítōngshì]
磁通勢 英文
magnetometive force
  • 磁 : 名詞1. [物理學] （磁性; 能吸引鐵、鎳等的性質） magnetism 2. （瓷） porcelain; china
  • 通 : 通量詞（用於動作）
  • 勢 : 名詞1 （勢力） power; force; influence 2 （一切事物力量表現出來的趨向） momentum; tendency 3 （自...
  1. Powerformer have some changes in constract with the conventional generator ， subsequently it also have some new problems in order to have an economical ， efficient ， credible development and application the structure and the philosophy of electromagnetism of powerformer will be on speaking terms changes electrical design ， magnetism design ， thermal design and structural design are have some new changes above all ， the electromagnetism parameter and the harmonic magnetomotive force of powerformer are studied in this paper first ， it mainly utilizes analytics to deduce formula of slot leakage reactance it considers three instances ， including monolayer - slot ， multilayer isometric - slot and multilayer anisometric - slot then ， the analytics and the fem are utilized to calculate slot leakage reactance of stator winding of prototype of powerformer and compare their results second ， the theory of utilitzing fem to calculate the reactance of powerformer is simply introduced ， including stable reactance ， transient and subtransient reactance specially ， the saturated influence of the stable reactance is considered then ， the results are analysed final ， it mainly introduces the influence of harmonic magnetomotive force of stator winding and analyses the harmonic magnetomotive force of stator winding then ， it mainly analyse harmonic magneto - motive force of stator winding through arranging various arrays of stator winding and observe their influence

    基於上述原因，本文對powerformer的電磁參數以及定子繞組諧波磁勢進行了研究。首先是用解析法推導出powerformer定子繞組槽漏抗的計算公式，考慮了單層圓形半閉口槽、多層等半徑圓形半閉口槽和多層不等半徑圓形半閉口槽三種情況，並對powerformer樣機的定子繞組槽漏抗用解析法和有限元法進行了計算，並比較其結果；其次，簡要介紹了有限元法計算powerformer電抗參數的原理，包括穩態電抗、瞬態電抗和超瞬態電抗，對穩態電抗考慮飽和影響，對結果進行分析；最後，介紹定子繞組諧波磁勢對電機運行性能的影響並對定子繞組諧波磁勢進行了分析。然後通過對定子繞組進行不同排列來分析定子繞組諧波磁勢，看看繞組排列對諧波磁勢的影響。
  2. A ti in an online mind - control forum recommends a web site called “ block emf ” ( as in electromagnetic frequencies ), which advertises a full line of clothing, including aluminum - lined boxer shorts described as a “ sheer, comfortable undergarment you can wear over your regular one to shield yourself from power lines and computer electric fields, and microwave, radar, and tv radiation. ” similarly, a tinfoil hat disguised as a regular baseball cap is “ smart and subtle

    一位受害者在網上的一個大腦控制（精神控制）論壇上推薦了一個網站「阻止電動勢」 （電磁波頻率） ，建議一系列的衣服，包括鋁內襯短褲，如此介紹「的確，你可以穿著舒適的內衣，屏蔽普通電纜和計算機電場、微波、雷達、電視輻射」 ，同樣，一個內藏錫帽的普通棒球帽也是「高明的和精巧的」 。
  3. Ti in an online mind - control forum recommends a web site called “ block emf ” ( as in electromagnetic frequencies ), which advertises a full line of clothing, including aluminum - lined boxer shorts described as a “ sheer, comfortable undergarment you can wear over your regular one to shield yourself from power lines and computer electric fields, and microwave, radar, and tv radiation. ” similarly, a tinfoil hat disguised as a regular baseball cap is “ smart and subtle

    一位受害者在網上的一個大腦控制（精神控制）論壇上推薦了一個網站「阻止電動勢」 （電磁波頻率） ，建議一系列的衣服，包括鋁內襯短褲，如此介紹「的確，你可以穿著舒適的內衣，屏蔽普通電纜和計算機電場、微波、雷達、電視輻射」 ，同樣，一個內藏錫帽的普通棒球帽也是「高明的和精巧的」 。
  4. The tem shows lots of nano silica particles circumfuse on the surface of the micro fe particles after the micro fe coated by silica. the sem analysis shows the same result. the vsm shows the micro fe particles have almost no remnant magnetism and coesive. the saturation magnetization decrease with the feed content of teos remenant magnetization and coesive are little

    隨著teos的投料的增加，材料飽和磁化強度呈下降趨勢，微米粒子磁化曲線通過原點，表面包裹后，剩磁與矯頑力變化很小對于微米鐵粉，其磁疇變化較快，沒有剩磁與矯頑力。
  5. The common principle is the use of the induction of an electromotive force by the variation of the magnetic flux through a coil.

    一般原理均是使用通過線圈的磁通量變化感應的電動勢。
  6. In the second part, provided that the operating mode of the turbo generator keeps unchanged when the rotor winding appears fault, the magnetic motive force of the field winding will keep unvaried

    通過對發電機磁動勢的分析，得出發電機在故障前後運行工況不發生變化的條件下，勵磁磁動勢將會維持不變的結論。
  7. Based on the thorough investigation of the post - regulation and efficiency in multiple output switching - mode power supplies, an optimal combination topology for multiple output switching converter is presented in this thesis, which is consisted of forward converter with active clamp ( fac ), synchronous rectification ( sr ) techniques and magnetic amplifier technique ( magamp )

    本文通過研究分析近年來多路輸出開關電源輔助輸出電壓調節和提高效率的方案，面對開關電源朝著輸出低電壓大電流方向發展的趨勢，提出多路輸出開關電源新的拓撲優化組合模式? ?有源鉗位正激變換器、同步整流技術、磁放大器。
  8. Through cell ammeter and armature magnetomotive force, we qualitativly analyze that harmonic magnetiv field has influence on motor operating performance, it can ensure whether slot coordination suits well or not

    通過槽電流表和槽磁動勢圖定性地分析電機的諧波磁場對電機運行性能的影響，由此確定電機所選槽配合是否合適。
  9. This paper theoretically analyses the armature current and magnetomotive force in ac exciter of brushless synchronous machine with rotating rectifier. under the normal or fault conditions of rotating rectifier, the mathematical expressions of the armature current, the m. m. f and induced electromotive force are approached

    本文通過對旋轉整流器在正常與故障狀態下的交流勵磁機電樞電流和電樞電勢作了初步的理論分析，推導出旋轉整流器在正常與故障狀態下電樞電流、空間諧波合成磁勢及其感應電勢的數學表達式。
  10. Furthermore, this dissertation also gives a comprehensive analysis and comparison to the torque ripple factor, torque - current ratio and other aspects for pseudo - sinusoidal emf bldcm drived by 120 conduction mode, 180 conduction mode and self - synchronous svpwm mode respectively. the simulation and the experimental results indicate that self - synchronous svpwm method is more effective for minimizing the torque ripple without any expense of the torque - current ratio when the crest width of the back - emf waveform is less than 107 electrical angles

    對準正弦波反電動勢無刷直流電動機在120導通方式、 180導通方式和自同步svpwm三種控制方式下的轉矩脈動系數、轉矩電流比等方面進行了全面的分析與比較，模擬研究和實驗結果表明，當反電動勢的平頂寬度小於107電角時，採用自同步svpwm控制方法可以在不損失轉矩電流比的基礎上，更有效地抑制電磁轉矩脈動。
  11. We simulate other structures using the commercial software cst microwave studio, we get the tendency of the change, better filtering characteristics and we gain some useful conclusions

    利用電磁模擬軟體cstmicrowavestudio對其他基片集成波導結構進行模擬，得出其特點和變化趨勢，得到了較好的帶通濾波特性，得出了一些有用的結論。
  12. According to computer calculating, we can obtain the harmonics amplitude of the stator coil of excitation machine

    通過計算，可得到勵磁繞組中感應電勢的各次諧波幅值。
  13. The minimum of resistivity at low temperature range can be explained by magnetic scattering which corresponds to the peak of magnetization. all of the experimental data can be well explained on the basis of vrh model, which comes from not the clusters, but the inhomogenous magnetic background. based on the mechanism of transport, cmr effect is elucidated

    體系磁性和電性的影響，通過實驗分析得出了下列結論： q ） dy對la的替代產生了無規的磁勢，破壞了mn o mn長程鐵磁序，導致在tn丁tc溫區出現團簇玻璃態，在t tn溫區，由於dy子大的磁矩， la （ dy亞晶格和mn亞晶格磁矩強烈的耦合，體系呈現反鐵磁態
  14. Base on certain main magnets of nmr this thesis designs the most excellent structure of the pole shape and obtains a relatively uniform magnetic field in a large imaging volume. the calculating model of pole shape made of pure iron can be simplified with the infinite permeability and calculated with the scalar potential. the rule between pole shape and the homogeneity or the size of uniform region of magnetic field is discovered and factors of influencing the homogeneity of the magnetic field are held so that the main magnet with the optimized size of pole shape can produce a relatively uniform magnetic field in a large imaging volume

    本文針對一類典型結構的主磁體，通過磁場分析與大量的計算，找到了極靴形狀的改變影響樣品區磁場均勻度以及均勻區域范圍的規律，掌握了極靴形狀的變化趨勢及其形狀影響樣品區磁場均勻度的各種因素，進行了極靴的形狀優化設計並編制了相應的計算機軟體，給出了極靴形狀的具體尺寸，使得主磁體能在更大空間內產生相對均勻的磁場。
  15. The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either

    在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。
  16. A commutator - brush combination is used as a mechanical rectifier to make the armature terminal voltage unidirectional and also to make the mmf wave due to the armature current fixed in space

    通過使用換流器電刷的組合作為一個機械整流器以使得電樞的端電壓為單方向的同時也使得由電樞電流所產生的磁動勢在空間是固定的。
  17. And the subroutine is developed to add the periodic condition in the commercial 3d fem software. 3d electromagnetic field analysis is done to analyze the magnetic flux distribution in the tfpm. base on the field analysis, the mathematical model is given

    採用簡化的三維電磁場計算方法對橫向磁通永磁電機內部磁通分佈進行了研究，計算了各部分的磁通密度分佈和漏磁通的走向，得到了電機的空載漏磁系數及空載反電動勢以及主要的漏磁通分量。
  18. In this article, introduce the important meanings of a - b effect, first is a have physics factors, second is wave function phase factor is connected with geometrical factor in ( b = 0, a 0 ), through a - b effect, we know : electromagnetic field vector e, b is local quantity, electromagnetic potential a, is global quantity, adding a, description and by the way of loop integral, electromagnetic field " effect is completely descripted

    本文介紹了有重要歷史意義的a - b效應， a - b效應揭示了兩點物理觀念的變革：一是電磁矢勢有物理效應。二是在無場強但有磁矢勢（ b = 0 ， a 0 ）的區域，波函數的相位因子與其運動空間結構有關。 a - b效應顯示； e 、 b是局域量， a 、是總體量，只有加入a 、之後的描述，並通過a的環路積分，才能對電磁場的作用做出完全準確的描述。
  19. The relation between the dimensions and performance studied in this paper. the orientation to obtain better performance is given. from the electromagnetic field calculation, it finds out that the flux leakage in the side surface is large. under this direction, a additional magnetic motive force is given against the flux leakage

    通過對橫向磁通永磁電機的電磁場分析計算，發現橫向磁通永磁電機轉子端面漏磁通占漏磁通比例很大，在計算結果的指導下採取了在漏磁通磁路中提供一個與漏磁磁勢相反的磁勢的方法來降低漏磁通取得了預期效果。
  20. Abstract : one of the unsolved problems of the high power application of high temperature superconductors is how to lower the energy dissipation induced by flux motion. due to the extremely high anisotropy, small coherence length and weak pinning potential, the mixed state phase diagram which is tightly related to the flux dynamics becomes very complicated. a brief account is given of the field induced crossover of criticalities of energy dissipation, which has been observed in our recent sensitive electromagnetic measurement

    文摘:高溫超導體在強電方面應用的關鍵問題是如何克服磁通運動所造成的能量損耗.由於存在極強的各向異性、短的相干長度和小的磁通釘扎勢，因此與磁通運動緊密相關的混合態相圖變得很復雜.文章綜述了根據一系列靈敏的電磁測量所觀察到的磁場誘導的能量耗散行為的轉變
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