脈沖直流 的英文怎麼說

中文拼音 [màichōngzhíliú]
脈沖直流 英文
pulse direct current
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  • 直 : Ⅰ形容詞1 （成直線的; 硬挺的） straight; stiff 2 （跟地面垂直的; 從上到下的; 從前到后的） erect; v...
  • 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...
  • 直流 : direct current （dc）; constant current; steady current; continuous current; zero frequency curre...
  1. For electrodeposition by dc methods, the metals deposite uninterrupted and the particles were also embeded uninterrupted into the coatings ; for electrodeposition by pc method, the particles with biggish volume were desorbed from the coatings and returned to the electrolyte again owing to the presence of pulse interval ; for electrodeposition by prc method, the particles carried positive charges are much more easy to desorb from the coatings owing to the effecf of reverse pulse current combined with pulse interval, in addition, the reverse pulse current also could dissovle the metals, further accelerates the desorption of particles, thus the particles size embeded in the coatings by prc method is the least

    直流電沉積時，基質金屬的沉積連續進行，粒子在電極表面不間斷嵌入鍍層;單脈沖電沉積由於脈沖間歇的存在使得具有較大體積的粒子會脫附，重新回到溶液中;採用周期換向脈沖時，反向脈沖電流使表面荷正電的較大的粒子更易從電極表面脫附，同時，反向脈沖電流對基質金屬的溶解作用，也會促進粒子的脫附，因此鍍層中復合粒子尺寸最小。隨著鍍層中粒子復合量的增加，三種鍍層的晶粒都明顯細化，說明al _ 2o _ 3的存在阻止了晶粒的長大，提高了電沉積過程中晶核的形成速率。
  2. A circuit topology of the inverter with duty cycle extended active clamp forward style high frequency pulse dc link is adopted by each independent inverter. each inverter is cascaded by a circuit with duty cycle extended active clamp forward style high frequency pulse dc link and a dc / ac inverting bridge. the control strategy of voltage mode pwm forwardback is adopted by the former, and the control strategy of three - state discrete pulse modulation ( dpm ) hystersis current is adopted by the later

    每個獨立的航空靜止變流器採用占空比擴展有源箝位正激式高頻脈沖直流環節電路拓撲，由占空比擴展有源箝位正激式高頻脈沖直流環節電路與dc ac逆變橋級聯而成，前級採用電壓型pwm前饋控制技術，后級採用三態dpm電流滯環控制技術。
  3. Position control of d. c. motors has been done by means of pulse width modulation.

    直流電機位置用脈沖寬度調製法控制。
  4. A novel pwm dc converter with snubber cell

    一種新的帶有緩沖單元的脈寬調制式直流變頻電路
  5. Three welding modes ： dc pulsed tig, dc mma

    集直流氬弧焊，脈沖氬弧焊，直流手工焊於一體。
  6. A design adding a dc chopper after the triphase rectification was given to reduce the peak of the pulse of voltage, aiming at the characteristics that the magnitude of the rated voltage of permanent magnet synchronous motor ( pmsm ) is far below that of the power supply, also the electric parameters of the devices were given

    針對專用永磁同步電機額定電壓大大低於電網電壓這一特點，為降低電機上承受的峰值脈沖電壓，設計了在三相整流之後增加一級直流斬波器並給出了相應的電氣參數。
  7. In the paper, on the basis of research of static state and transient state in the scr and series connection valve circuit, the high voltage scr changing current valve device has been developed for ac - dc - ac high voltage commutatorless motor. the series connection valve circuit has been designed and simulated. the hardware design and software programming of trigger pulse system and monitoring system in the photo - electronic - photo fashion has been completed

    無換向器電動機在火電廠等工礦企業的電機調速節能領域中有十分廣闊的應用前景，本文在對晶閘管元件和串聯閥電路的靜態特性和動態特性研究的基礎上，研製了用於交直交電流型高壓無換向器電動機的高壓晶閘管換流閥裝置，進行了串聯閥電路的設計和模擬，完成了電光電方式的觸發脈沖系統和監測系統硬體設計及軟體編程，並進行了裝置的實驗調試。
  8. Multiple functions available ： start / crater arc current, increase / decrease time, base / crest value current, pulse frequency, pulse rate, post flow time, hf welding

    功能豐富：起始/收弧電流、上升/下降時間、基值電流、峰直電流、脈沖頻率、占空比、滯后關氣時間分別可調，高頻引弧。
  9. Second, the results of theory analysis and simulation research show that the output of one cycle controlled bridge switching power amplifier have dc offset because of the nonideal characteristic of reset signal. the magnitude of output dc offset voltage is proportional to width of reset pulse. a voltage compensation technique is used to solve this question, and the computation formula of compensation voltage is gived. the circuit compensated and not are researched through simulation and experiment, which results show that compensated circuit solve the output dc offset effectively

    其次，理論分析和模擬研究結果表明，由於復位脈沖的非理想特性，單周控制的全橋開關功率放大器輸出端存在直流偏置問題，其大小與復位脈沖的寬度成正比。針對輸出直流偏置問題，提出了電壓補償的改進方案，給出了補償電壓的具體計算公式。對補償前和補償后的方案進行了對比模擬研究和實驗研究。
  10. In gan hemt drain pulse current collapse experiments, drain current under pulse condition collapsed about 50 % than direct current condition and the pulse signal frequency affected little on current collapse. when gate voltage is small, the relationship between pulse width and drain current is i0 ( + t / 16 )

    在ganhemt漏極脈沖電流崩塌測試中，發現脈沖條件下漏極電流比直流時減小大約50 % ;脈沖信號頻率對電流崩塌效應影響較小;當柵壓較小時，隨著脈沖寬度的改變漏極電流按i0 （ + t / 16 ）的規律變化。
  11. In gan hemt gate pulse experiments, drain current under pulse conditon collapsed about 47 % than direct current condition and the pulse width affected little on current collapse. the relationship between drain current and pulse frequency is ncoxw [ m + ( n + k ? ) vgs + ( n + k ? ) vgs2 ] ( vgs - vth ) 2 / l

    在ganhemt柵極脈沖電流崩塌測試中，觀察到柵脈沖條件下漏極電流比直流情況下減小了47 % ;隨著信號頻率的改變，漏極電流按ncoxw [ m + （ n + k
  12. The shorter the interval between the two pulses of the current wave, the fewer strikes the varistors can endure. at the same time, the dc ljima changes fast - slowly - fast alone with the experiment continuing. microstructual disorder, such as variations in the height of the electrostatic potential at grain boundaries and electrode protrusions into the zinc oxide varistors, causes substantial temperature rise in a microscopic region around the defect and is the source for failure

    雷電的多重閃擊對雷電過電壓保護器件的影響更加嚴重，本文首次採用不同間歇時間雙脈沖電流沖擊對氧化鋅電阻進行了多次試驗，試驗表明：氧化鋅電阻在雙脈沖電流沖擊下更容易出現老化破壞現象，間歇時間越短，電阻能耐受的沖擊次數越少；此外，直流u _ （ 1ma ）值隨沖擊次數的增加具有快一慢一快的下降過程。
  13. A prototype for 3000va 27vdc / 115v400hzac three - phase aviation static inverter with high frequency pulse dc link is designed and successfully developed

    設計、研製成功了3kva27vdc 115v400hzac三相高頻脈沖直流環節航空靜止變流器。
  14. The operation principle of the aviation static inverter with high frequency pulse dc link is discussed, and the design criterions of the key circuit parameters are gained

    本文論述了高頻脈沖直流環節航空靜止變流器的工作原理，獲得了關鍵電路參數設計準則。
  15. The three - phase aviation static inverter with high frequency pulse dc link is made of three independent aviation static inverters and has the advantages such as strong function with unbalanced load and easy realization for module

    三相高頻脈沖直流環節航空靜止變流器由三個獨立的航空靜止變流器構成，具有帶不平衡負載能力強、易於實現模塊化等優點。
  16. This series welding machine integrates the characteristics of alternating ( impulse ) / direct ( impulse ) argon arc welding and hand welding. it is an international advanced multifunction and multipurpose welding torch

    本系列焊機集交流（脈沖） /直流（脈沖）氬弧焊、交流/直流手工焊於一體，一機多用，是一種具有國際先進水平的多功能、多用途焊機。
  17. Based on the dc diffusion model, we build a duplex diffusion layer model which is composed of inner pulse diffusion layer and outer stable diffusion layer. in inner pulse diffusion layer, the concentration of ions fluctuates with frequency of pulse current ; in outer stable diffusion layer, the transport speed of ions is almost stable all the time, the main purpose is to transport the ions from the mass to the pulse diffusion layer

    在直流電沉積的擴散理論基礎上，建立了脈沖電沉積的雙擴散層模型，靠近電極為脈沖擴散層，擴散層內金屬離子的濃度隨脈沖電流的頻率而波動;脈沖擴散層外麵包圍著一層穩態擴散層，其中離子的擴散速度在整個過程中基本是穩定的，作用是將主體溶液中的離子不斷向脈沖擴散層中補充。
  18. Numerical simulation and analysis of pulsed direct current brazing temperature field with computer

    脈沖直流電弧釬焊溫度場計算機模擬及分析
  19. A new high - speed ert experiment system based on the bi - directional current pulse technique is designed and developed. on - line observation is realized for simulating gas / liquid two - phase flow using this experiment system

    提出並研製成功了一種新型的基於雙極性脈沖電流激勵的高速電阻層析成像系統並實現了垂直管道的氣液兩相流的在線監測。
  20. Keywords : gims, ion source, anode layer, sputtering, tin, ion plating ， medium frequency, pulsed dc

    中文關鍵詞：氣離濺射、離子源、陽極層流、濺射、氮化鈦、離子鍍膜、中頻、脈沖直流。
分享友人
分享到 Line

分享到臉書