direct current dc 中文意思是什麼

direct current dc 解釋
直流（電）
  • direct : adj 1 筆直的，一直線的；正面的。2 直接的。3 直截了當的，直率的，明白的。4 直系的，正統的。5 【語...
  • current : adj. 1. 通用的，流行的。2. 現在的，現時的，當時的。3. 流暢的；草寫的。n. 1. 水流；氣流；電流。2. 思潮，潮流；趨勢，傾向。3. 進行，過程。
  • dc : ＝1 direct current 直流電：a DC generator 直流發電機。2 District of Columbia 哥倫比亞特區〈美國首...
  1. The modulating signals of firing delay angle at the rectifier and firing lead angle at the inverter, and the excitation voltage are chosen to be control variables. the offset of the current of dc line and the extinction angle and the power angle of generator are chosen to be control outputs. then a nonlinear controller is designed for the system under study according to direct feedback linearization theory

    以整流側觸發延遲角的調節信號、逆變側觸發超前角的調節信號以及發電機勵磁電壓作為控制變量，以直流線路電流、逆變側關斷角以及發電機功角的偏移量作為目標輸出，用直接反饋線性化方法設計了系統的非線性控制器。
  2. First, passive resistance network was selected as direct current biasing network, which offered direct voltage for base through the resistance voltage divider composed of two resistances, among them the upper resistance connected from the dc to base, the lower resistance connected from the base to ground. the collector connected with dc directly

    直流偏置網路採用無源電阻網路，通過由兩個電阻組成的電阻分壓器為基極提供直流電壓，上偏電阻從電源串聯到基極，下偏電阻從基極到地，集電極直接加電。
  3. In the thesis, a signal processing scheme of polarization - insensitive fiber optic michelson interferometric magnetic sensor is described : making the interferometer work near the quadrature with closed loop controlling working point method, the fundamental frequency component of the magnetic field sensing signals can be detected to measure the input direct current ( dc ) magnetic field by phase sensitive demodulation

    本文主要介紹了偏振無關光纖michelson干涉型微弱磁場傳感器信號處理的方案:通過閉環控制工作點演算法使干涉儀工作在正交工作點處，再利用相敏檢波演算法提取傳感器輸出信號的基頻分量，以測量直流磁場的大小。
  4. These direct current ( dc ) permanent - magnet wound field servomotors range from 3, 000 revolutions per minute ( rpm ) to less than 1 rpm without stalling

    這些直流永磁鐵將使補助馬達間接變速裝置從每分3000轉降低到每分1轉，並無延遲。
  5. Dc current signal : 0 - 2. 5a direct input ; if the current exceed 2. 5a it can adopt flow divider to transform into voltage signal whose full range is 75mv to input

    直流電流信號： 02 . 5a直接輸入，超過2 . 5a採用分流器轉換成滿量程為75mv的電壓信號輸入。
  6. These topologies of inverters are composed of two bi - boost dc / dc converters, they are symmetry. so whole circuit turn into four - quadrant converters, we can control every power mosfet on or off. then we can get sine wave with direct current polarization at the left, at the same we also can get sine wave with direct current polarization phase contrast 180 compared of the left at the right

    這類逆變器由左右二個雙向boostdc / dc變換器構成，左右二邊是對稱的，所以整個電路構成了一個四象限變換器，我們可以恰當控制各功率管的開、關，使左邊的兩象限dc / dc變換器輸出一個帶直流偏置的正弦波，使右邊的兩象限dc / dc變換器輸出一個相差180度帶同樣直流偏置的正弦波形，這樣，負載zl上的電壓是左、右兩個dc / dc變換器電壓的差動輸出，正好可以消掉直流偏置，最終在負載r1上得到的就是正弦波。
  7. Helium - charged al films are prepared by direct current ( dc ) magnetron sputtering with a he / ar mixture

    摘要採用氦氬混合氣氛下直流磁控濺射沉積方法制備含有氦原子的金屬鋁膜。
  8. Considering the practicality in specific design, the two different drive system has been designed in the electrical control system, this is, the hoist and gantry uses a set of the ac ( alternating current ) frequency conversion timing drive system, the trolley and boom uses a set of the dc ( direct current ) adjusting voltage and timing system

    在具體設計時考慮到實用性，設計的電氣控制系統中採用了兩類不同的驅動系統，即起升與大車共用一套交流變頻調速驅動系統，小車與臂架俯仰共用一套直流調壓調速驅動系統。
  9. It is composed of four parts : dc ( direct current ) power supply, resonance charging and polarity reverse unit, electric relay control unit and computer control unit

    它主要由四部分組成：三相整流直流電源，諧振充電及電壓反向單元，繼電器控制單元，計算機控制單元。
  10. According to the space vector modulation method of the equivalent structure of the ac - dc - ac transformation, the transformation relations of the matrix converter are deeply investigated. the ac - ac direct conversion control and the double - space - vector pwm scheme of the matrix converter are deduced, the four - step current commutation strategy of matrix converter is expatiated, the design method of input filter and over voltage protection circuit is analyzed, and the modeling and simulation of a three - phase matrix converter are implemented

    從等效交-直-交變換的空間矢量調制方法出發，深入分析了矩陣式變頻器的變換關系，導出了交-交直接變換控制規律和雙空間矢量脈寬調制技術，闡述了矩陣式變頻器的換流控制策略，分析了輸入濾波器和過電壓保護電路的設計方法，實現了矩陣式變頻器的建模和運行分析。
  11. The power circuit of the system adopts the voltage frequency conversion structure of ac - dc - ac, and is composed of the commutation circuit, filter circuit and intelligence power module ( pm15rsh120 ). control circuit takes the dsp chip tms320lf2407 as core, including the pwm signal occurrence circuit, detect circuit of stator current and direct current voltage of generatrix, drive circuit of intelligence power module, detect circuit of speed, protect circuit of system etc. all of this builds the full digital vector control system of asynchronous motor

    該系統的功率電路採用電壓型的交-直-交變壓變頻結構，由整流電路、濾波電路及智能功率模塊ipm （ pm15rsh120 ）逆變電路構成;控制電路以dsp晶元tms320lf2407為核心，加上pwm信號發生電路、定子電流檢測電路、直流母線電壓檢測電路、智能功率模塊驅動電路、速度檢測電路、系統保護電路等，構成了功能齊全的異步電機全數字化矢量控制系統。
  12. The morphology, chemical compositions, crystal structures and some properties of these obtained nanowires were systemically characterized. < wp = 6 > because of their novel properties and unique structures, one - dimensional nanostructrue semiconductor materials have generated a tremendous amount of interests in fundamental and potential promising applications in electronic and photoelectronic devices. we fabricated cdse, te and cdte nanowires by direct current ( dc ) electrodeposition in porous anodic aluminum oxide ( aao ) templates

    本論文採用電化學模板合成法制備出了幾種新型的納米線，並對它們的形貌、組成、晶體結構及其他一些性質進行了表徵；發展了一種用紫外可見光分光光度法分析電沉積在導電玻璃上的ni - fe合金鍍層的方法；用模板脈沖電沉積法制備了fe20ni80 / ag多層納米線，並對它的形貌進行了初步表徵。
  13. Direct - current linear variable differential transformer dc - dc lvdt displacement transducers

    直流差動變壓器式位移傳感器
  14. While edison feuded with rival electrical pioneers over whether power should be distributed using a direct current ( dc ) or an alternating current ( ac ), the issue dividing opinion today is climate change and regulation of greenhouse gases

    當年愛迪生與同為電氣先鋒的競爭對手在配電應使用直流電（ dc ）還是交流電（ ac ）的問題上爭執不下，而目前存在分歧的，是氣候變化和溫室氣體監管問題。
  15. The paper sums up the intelligent monitoring actuality and trend of the dc panel. by analyzing many method ' s advantage and disadvantage of the leaking electricity inspection, the paper brings forward a method of the leaking electricity inspection by injecting the direct current signal

    本文總結了直流屏智能監控的現狀和發展趨勢。通過對漏電檢測多種方法的優缺點的分析，提出了注入直流信號進行漏電檢測的方法。
  16. Firstly, the thesis introduced a eoct scheme that supplied on a special coil. it utilized saturation of special coil to transform form 10a ~ 720a current of busbar to 8v ~ 40v voltage of inductions. after switched to direct current, it supplied the loads of sensor by dc - dc transformations, which is included two + 5v voltages with respective ground and a group of 12v voltage

    該供能方案利用特製線圈的飽和特性，將母線電流大致在10a ~ 720a的電流感應約為8v ~ 40v的電壓能量，利用整流橋將交流電變為直流電后，由dc - dc變換器件將其轉換為兩路不共地的+ 5v和一組12v電壓供給後端傳感頭。
  17. The paper analyzed the features and present state of the dc ( direct current ) system of the substation, then designed a full - function and easy - control supervisory device for the dc system

    本文分析了變電站直流系統的特點和現狀，並且根據變電站直流系統監控的要求，設計了功能完善、操作方式友好的監控裝置。
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