無電勢的 的英文怎麼說

中文拼音 [wúdiànshìde]
無電勢的 英文
potential-free
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 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...
  • 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...
  • 的 : 4次方是 The fourth power of 2 is direction
  1. In general, there is a measurable difference in potential between the two electrodes whether the cell is passing a current or not.

    通常，無論電池有無電流流過，兩電極之間均具有可測量的電勢差。
  2. The simulation results prove that this control technique can effectively minimize the torque ripple for the bldcm drives whose back - emf waveform crest width is less than 120

    模擬結果表明這種控制策略能有效地抑制反電動勢平頂寬度小於120電角的無刷直流電動機的換相轉矩脈動。
  3. 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。
  4. For the bldcm which has a general crest width of the back - emf waveform, two kinds of torque ripple conditions when drived by sine - wave current as well as by square - wave current are deduced based on the mathematical models. in addition, a comparison is carried out between these two conditions, which indicates that sinusoidal current driving is more favorable to minimizing the torque ripple when the crest width of the back - emf waveform is less than a certain value

    闡述了抑制齒槽轉矩措施對反電動勢波形的影響，利用無刷直流電機的數學模型推導並比較了任意平頂寬度梯形波反電動勢在正弦波和矩形波兩種電流驅動下的電磁轉矩脈動情況，得出在梯形波平頂寬度減小到一定數值后採用正弦電流驅動更有利於減小電磁轉矩脈動。
  5. Based on the basic analysis of the structure and power elements of the hybrid vehicle, this thesis presents a powertrain system with a metal pushing belt cvt, aiming to the development status and trend of the hybrid vehicle technology in our country. a rational control strategy and its work mode of this powertrain system are determined, and correlative parameters such as the engine power, the starting torque, and the differential ratio, the rated power and torque of the motor, and the ratio of the torque synthesizer are systematically designed for the changan star 6350b. at the same time, the design of these parameters is considered as the base of the simulation of the motor control system in next step

    在對混合動力汽車的結構型式和動力元件進行基礎性理論分析后，針對我國汽車技術發展現狀和混合動力汽車技術的發展趨勢，設計了一種基於金屬帶式無級自動變速器cvt混合動力汽車動力傳動系統方案，根據該傳動系統方案制定了比較合理的控制策略和工作模式，並針對長安之星6350b設計了發動機功率和起始轉矩、主減速比、電機的額定功率和轉矩、轉矩合成器速比等相關參數，為下一步的電機控制系統模擬實驗打下基礎。
  6. This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits

    本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的
  7. 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
  8. At the same time, the power capacity of the above mentioned antenna is preliminarily analyzed. the results show that in the pass band, their power capacities increase with the frequency on the whole, ranging from 10 ’ s kw to 100 ’ s kw. with the change of the pulse duration of microwaves, the measurement is carried out on the sensitivity of the detectors of the types wb - cd01 and 2087 - 6001 - 00, on the attenuation of the

    通過調整微波脈寬，對wb - cd01型、 2087 - 6001 - 00型等檢波器的靈敏度，對2082 - 4137系列和tts系列衰減器的衰減量，對rg - 142型微波電纜的衰減量進行了實驗測定，結果表明:在微波脈寬大於40ns時，檢波器靈敏度基本無變化;當微波脈寬在20 ~ 40ns時，檢波器靈敏度會有一定變化，變化趨勢和程度與檢波器的型號有關;而上述型號的衰減器和微波電纜的衰減量幾乎不受微波脈寬的影響。
  9. The conclusion is that inductive electromotive force, gotten from sensor with the distribution regularities of weighting function, is proportional to the average flow velocity in pipe and is not relevant to the distribution of flow velocity when flow velocity is non - central symmetry with the central axis. so electromagnetic flowmeter could solve the question of high accuracy in principles

    得出按權重函數分佈規律的傳感器，在流速非中心軸對稱分佈時，感應電勢僅與平均流速呈正比，而與流速分佈無關的結論，從而從原理上解決電磁流量計了高精度測量的問題。
  10. In the case that there is only one island that contains an excess electron, we can get the single charge soliton solution of potential distribution in a finite array from the analytic expression we have got. and we find that in the limit of the junction number our result will naturally reduce to the result in the infinite array approximation

    當結鏈中只有一個島上有剩餘電子時，由所得的解析表達式可以得到有限長鏈中電勢分佈的單電荷孤子解，並發現當結的數目趨于無窮大時，這個解將自然過渡到無限長鏈近似下的結果。
  11. Based on intelligent power module ( ipm ) and digital signal processor ( dsp ), this system used hack - emf ( electromotive force ) method to implement the sensorless control for brushless dc motor of air conditioner ( ac ) in fcv

    該系統基於智能功率模塊（ ipm ）和數字信號處理器（ dsp ） ，採用反電勢法實現了電動汽車空調用無刷直流電動機的無傳感器控制。
  12. In this chapter, the method of bldcm rotor position detection is first discussed. then the principle and algorithm of bemf zero crossing point detection is explained. in succession, the chapter dissertates the software realization of the bemf zero crossing point detection algorithm, the software disturbance filter and the modification of phase displacement, and the software realization of commutation point

    在這一章中，先簡述了無刷直流電機的轉子位置器檢測方法；然後論述了反電動勢過零檢測原理和演算法以及該演算法的軟體實現、軟體濾波和相移修正、換相點的軟體實現；最後對軟體開環換相起動策略作了詳細論述。
  13. The vector magnetic potential of a system consisting a line electric current and an infinite long magnetic dielectric column is calculated with the method of separation of variables and method of images, it is pionted out that the vector magnetic potential of a system consisting a line electric current and a magnetic dielectric plane, an ideal paramagnetic column, a superconductor column, and a line electric current in homogeneous magnetic field can all be deduced from our calculation

    摘要用鏡象電流法和分離變量法計算了線電流與無限長磁介質圓柱系統的磁矢勢，指出線電流與無限大磁介質分界平面、線電流與超導體圓柱、均勻外磁場中有磁介質圓柱系統時的磁矢勢都可以由線電流與磁介質圓柱系統的磁矢勢的極限情形給出。
  14. Abstract : based on the classical theory, the harmonic winding potential of the tooth harmonic brushless exciting generator have been calculated and analysed. the results tally with the data of no - load test very well. it was demonstrated the designing thread of harmonic winding is correct

    文摘:從經典理論出發，對齒諧波無刷勵磁發電機的諧波繞組電勢進行了分析計算，其結果與空載實驗得出的數據完全吻合.說明諧波繞組的設計思路是正確的
  15. This paper uses " virtual neutral point method " to measure the " zero crossing ", then the soft deal " zero crossing " to get the six key position to commutate

    本文採用虛擬中點的方法來識別反電勢過零點，然後對過零點進行處理得到無刷電機換向的六個關鍵位置。
  16. The system uses the microchip pic16f877 made by microchip co. ltd as a control chip. it fulfills the capture of " zero crossing " point and the multifarious protective functions. it realize the approximately exact commutation of the motor and unmanned supervision of the system

    本系統是以microchip公司生產的pic16f877為核心晶元，軟硬體結合完成對反電勢過零點的捕捉和系統的各種保護，實現了電機較為準確的換向和無人監控安全運行。
  17. The non - ideal bemf waveform of bldcm is often caused by two facts. one is that the platform width of bemf waveform is less than 120 ; the other is the cogging harmonics existed in the bemf waveform

    非理想反電動勢波形的無刷直流電機有兩種情況，一種是反電動勢的梯形波的平頂寬度小於120 ；一種是由於磁場分佈受齒槽的影響，反電動勢存在齒諧波，使其波形發生畸變。
  18. Electroless plating nickel is a kind of electroless deposition process with extensive applicaton. compallng with electro - depositon process, the process has a lot of advamages, such as easy operation, low process condition, uniform electroless plating film

    化學鍍鎳是一項已獲得廣泛應用的無電沉積方法，同電沉積相比，它有操作簡便、設備條件要求低、鍍層均勻等優點，其發展勢頭迅猛，前程未可限量。
  19. We also select the microchip pic16f877 made by microchip co. ltd as a control chip to realize micro - computer control. this system use three separate channel to find out the " across the zero point " of each back - emf. the program use digital filter to wipe off the pwm interferences and the commutating interferences

    系統中採用三個獨立通道分別檢測無刷電機三相繞組的反電勢的各自過零點，同時在軟體中採用數字濾波以消除其它噪聲干擾，使檢測電路檢測到的反電勢過零點更加準確可靠，實現了對五位置傳感器直流無刷電機的數字控制。
  20. It shows that when wave propagates along axis direction, the displacements of radial, axis direction and the change of electric field are coupling each other, and there is dispersing phenomenon, and the displacement of circle direction can figure out independently, it has not dispersing phenomenon

    發現當波沿著圓柱殼體軸向傳播時，物質的徑向運動軸向運動和電勢的變化相互耦合，伴有頻散現象但是扭轉運動可以獨立表示，並且同電場無關，無頻散現象。
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