逆磁場 的英文怎麼說

中文拼音 [nìcíchǎng]
逆磁場 英文
counter field
  • 逆 : Ⅰ形容詞1 （方向相反） contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 （抵觸; 不順從） go aga...
  • 磁 : 名詞1. [物理學] （磁性; 能吸引鐵、鎳等的性質） magnetism 2. （瓷） porcelain; china
  • 場 : 場Ⅰ名詞1 （平坦的空地 多用來翻曬糧食 碾軋穀物） a level open space; threshing ground 2 [方言] （...
  • 磁場 : [物理學] （傳遞運動電荷或電流之間相互作用的物理場） magnetic field
  1. Application improved field elimination method to inverse problem of electromagnetics

    應用於電磁場逆問題中的改進區域消除法
  2. In small fields the changes are reversible.

    在很弱的磁場中，這種改變是可逆的。
  3. Magnetic field polarity reversals are magnetic poleshifts

    磁場極性逆轉就是磁極轉換。
  4. A reversal could knock out power grids, hurt astronauts and satellites, widen atmospheric ozone holes, send polar auroras flashing to the equator and confuse birds, fish and migratory animals that rely on the steadiness of the magnetic field as a navigation aid

    逆轉會破壞能量網格，損害宇航員和衛星，加大臭氧層空洞，發送極光到赤道而搞亂鳥類，魚和遷徙動物，它們依靠磁場的穩定性作為導航幫助。
  5. Some research about sensorless control of induction motors in recent years has been introduced in chapter one. in chapter two, a field - oriented control system with current regulator and voltage source inverter ( vsi ) is presented firstly, which is proved in theory that the voltage feed - forward decoupler can be omitted, the good decoupled control properties of flux current and torque current is also validated by experiments with speed - sensor based on f240dsp real system

    論文第二章從異步電機的基本數學模型入手，介紹了一種基於轉子磁場定向的帶電流內環控制的電壓型逆變器輸出閉環矢量控制結構，在理論上證明了該模型可省略電壓前饋解耦環節，採用f240dsp晶元構建的帶速度傳感器實驗系統驗證了其定子電流勵磁分量和轉矩分量有良好的解耦控制特性。
  6. The design of excitation power source based on principle of three phase step motor and pulse width modulation ( pwm ) technology, intelligent power model ( ipm ) is used for inverter switches, the output ac pulse used as excitation signals. the speed of rotation and magnetic intensity can be changed by regulate the exciting converted frequency and magnitude of exciting current. constant current is achieved by closed loop feed back

    勵磁電源結合步進電機原理與脈寬調制技術，選用智能功率模塊ipm作為逆變開關器件，輸出交流脈沖勵磁信號，以調節勵磁轉換頻率和勵磁電流大小為手段，實現對磁場旋轉頻率和磁場強度大小的有效調節，並通過閉環反饋實現閉環恆流控制。
  7. Finite element preprocessor, eddy current electromagnetic field calculation, the postprocessor and the visualization processor were integrated together in the software system, and good graphic user interface was also offered

    該系統將有限元前處理、渦流電磁場計算、滲碳層深度逆問題求解及計算結果的可視化處理結合起來，提供了良好的用戶界面。
  8. No seismic reflection wave imaging technology, as well as the crustal rocks and the ocean ridges residual magnetic field sensors return reverse, there is no better explanation, can only use " earth ' s magnetic field reversal " to explain this phenomenon in order to cover up the phenomenon nature of the problem

    也沒有地震反射波的成像技術，以至對地殼巖石和大洋洋脊的感應剩磁場來回反向問題，沒有更好的解釋方法，只能用「地球磁場逆轉」來解釋此現象，以現象掩蓋了本質問題。
  9. The inverter drive signals are synchronized with the position sensor output signals so that synchronism between the stator winding currents and the rotor flux is ensured for any speed

    逆變器的驅動信號與轉子位置信號同步從而保證在任意的速度下定子繞組電流與轉子磁場同步。
  10. Inverse electromagnetic problem has been paid attention in the designing of electromagnetic devices for long time

    電磁場逆問題在電磁裝置優化設計中是倍受關注的研究課題。
  11. During a reversal, the main field weakens, almost vanishes, then reappears with opposite polarity

    在逆轉期間，主磁場減弱，幾乎為零，然後以相反的磁極重新出現。
  12. This paper studies on used the ac servo system based on ti dsp ( lf2407a ) and the foc and digital signal processing thorem, achieves following results : algorithm. we employ svpwm ( space voltage pwm ) algorithm, improve the efficiency of the electric source, and decrease the harmonious elements. we build the mathematic model of the system and simulate it on matlab platform, dsigne segmented pid regulator to adapt variable speed and widen the speed range. measurement. the velocity and electric current measuring, we adopt multi - sampling - rate and digital filter principles. as more improvements we make, the whole system gets a good results. pc control. the complete controlling system can be controlled remotely. so we develop the pc controlling program.

    採用磁場定向脈寬調制演算法，提高了電源利用率，降低了逆變電壓的諧波，改善了電機的運行特性，降低了對電網的污染；在matlab平臺上建立了交流永磁同步伺服電機和電壓空間矢量脈寬調制控制系統的數學模型，在模擬的基礎上，對傳統pid調節器進行了改進，提出轉速調節器和電流調節器採用分段pid結構，根據給定轉速所處的區間，自動選擇相應pid調節器的參數，拓寬了調速范圍，提高了控制精度。
  13. The geologic record also shows that the strength of the magnetic field varies widely in time, and fluctuates wildly during field reversals, sometimes dropping to zero gauss strength ; ie : the field vanishes, disappears

    地質記錄也表明磁場強度在時間上普遍變化，在磁場逆轉期間廣泛波動，有時降到零高斯強度；也就是：磁場消失不見了！
  14. The direct torque control theory is a kind of new control method after vector control theory in ac control field. it calculates and controls the torque and the flux of ac electromotor in stator coordinate using the voltage space vector. adopting the stator magnetism field direction method, it recurs to discrete pang - pang control producing pulse width modulation signal and controls the switch state of the transductor when better quality steady - state performance is produced

    直接轉矩控制技術是繼矢量控制技術之後交流調速領域中新興的控制技術，它採用空間矢量分析的方法，直接在定子坐標系下計算並控制交流電動機的轉矩和磁鏈，採用定子磁場定向，藉助于離散的兩點式控制產生脈寬信號，直接對逆變器的開關狀態進行最佳控制，以獲得轉矩的高動態性能。
  15. Collective radiation spectra of the resonant inverse compton scattering of the assembly of relativistic electrons in a variable magnetic field

    變化磁場中相對論電子系集體的共振逆康普頓散射譜
  16. In this scheme, the torque of motor is calculated and controlled in the staler reference frame. by using stator field orientation, the optimum switching mode is achieved to control the inverter

    它直接在定子坐標系下計算和控制交流電動機的轉矩，採用定子磁場定向控制，直接對逆變器的開關狀態進行最佳控制。
  17. This paper improves some commonly used stochastic optimization algorithms, such as genetic algorithm, simulated annealing algorithm and tabu search algorithm, and improved algorithms are verified by the standard mathematical functions. then, improved algorithms are used to solve practical electromagnetic problems and the items of practical application of algorithms worthy of paying attention to are emphasized

    本文對遺傳演算法、模擬退火演算法、禁忌搜索演算法等幾種常用的隨機類優化演算法進行了改進，以標準數學函數作為檢驗依據對改進演算法作出評價，並將各改進的演算法應用於實際電磁場逆問題的求解，總結其應用的實際經驗和見解。
  18. This paper focuses on the electromagnetic field computation and inverse electromagnetic field problem of switched reluctance motor

    本文對開關磁阻電動機電磁場分析與逆問題計算進行了深入系統的研究。
  19. Abstract ； on the " earth ' s magnetic field reversal " one said, we have not experienced a human nor historical records

    摘要；關于「地球磁場逆轉」一說，我們人類並沒有經歷過，也沒有歷史記載。
  20. The calculation includes the positive and inverse problem to solve the electromagnetic field

    其中計算，即模擬研究包括求解電磁場的正問題和逆問題。
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