dc level 中文意思是什麼

dc level 解釋
直流電平
  • 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...
  • level : n 1 水平儀，水準儀；水準測量。2 水平線，水平面；水平狀態；平面，平地。3 水平，水準；水位；標準；...
  1. Again, small dc shifts in the black level caused by residual sync can disturb the color balance or gains of the video channels

    同樣，由於殘留的同步信號而導致的黑電平上很小的直流偏移依然能夠影響顏色的平衡和各個視頻通道的增益。
  2. The main work of this thesis is theoretical and experimental research on non - isolated single - end three - level dc / dc converters with passive lossless soft switching. a 1kw three - level buck converter with passive soft switching is designed to verify the research

    本文的主要工作是對無源軟開關三電平非隔離dc dc變換電路的理論與實踐研究，設計並實現了一臺功率1kw的無源軟開關三電平buck變換器。
  3. Plc - based two - level analog - digital computer control in dc sr system

    模混合直流調速系統研究
  4. Karin ryding, a professor of arabic at georgetown university in washington, dc, says she is pleased that the survey found growth in the study of both introductory and advanced level courses in foreign language

    一位華盛頓喬治郡大學的阿拉伯語教授說她對調查中發現的對外語的導言以及高級課程的學習增長感到很高興。
  5. Chaotic switching modulations introduce low - frequency harmonic spectrum of output voltage as random switching modulation. in some case, low - frequency noise ripple offset the effect chaotic switching modulations reduce the level of emi. it indicates that the ccfmfd integrates the advantages of spreading harmonic power at the multiples of the switching frequency and not introducing significant noise ripple at low - frequency range. among all chaotic switching modulations, the ccfmfd is considered as the best choice in applying to dc / dc converter

    與隨機調制模式相同，混沌開關調制模式也引入輸出低頻噪聲紋波，有些情況下低頻噪聲紋波可能抵消混沌開關調制降低emi水平的效果。分析表明： ccfmfd模式具有較好的降低emi水平和引入較小低頻紋波的優點，可以作為混沌調制模式較佳的選擇。
  6. Because the switches suffer only the half of the input voltage, the three - level ( tl ) converters have been attracting more and more attentions. this thesis proposes a family of zero - voltage - switching multi - resonant three - level dc / dc converters

    三電平變換器可以降低開關管的電壓應力，並且可以減小輸出濾波器（或儲能元件）的大小，近年來逐步成為電力電子技術的一個研究熱點。
  7. But even at this height an overhead dc line will beat an ac line at distances more than 1, 000km ( 600 miles ), while ground - level dc will beat ac at distances as short as 30km

    但即使是這樣的高度，高架直流電纜也比交流電纜的最大傳輸距離遠1 ， 000千米（ 600英里）以上，地面直流電纜比交流電纜傳輸距離遠30千米。
  8. According to recording data of higher level monitor and control system when main motor drive system for four - high medium plate mill is operated, and relation between armature voltage of dc electromotor and ac input voltage of inverter, trip cause of dc fast automatic switch was analyzed in detail, and specific countermeasure and measures are given

    根據中板四輥軋機主電機傳動系統運行時的上級監控系統記錄數據，以及直流電機電樞電壓與變流器交流側輸人電壓的關系，詳盡地分析了直流快速自動開關跳閘故障原因，並提出具體的對策及措施。
  9. A power ' s level affects the dc for any saving throw allowed against the power

    異能的能級影響對抗該異能的豁免檢定dc （如果可以豁免） 。
  10. One day after being struck, the subject must succeed at a fortitude save ( dc 18 ) for each negative level or lose a character level

    被擊中24小時后，目標必須為每一個負向等級進行一次強韌豁免檢定（ dc = 18 ） ，失敗則失去一級人物等級。
  11. The electrical damping within the whole subsynchronous frequency range is calculated. the impacts of the unit interaction factor between hvdc and turbine generator, the dc power level, the firing delay angle and the parameter settings of hvdc controller on the have the potential danger of subsynchronous oscillation

    在整個次同步頻率范圍內，計算得到了系統電氣阻尼，並詳盡地分析了同步發電機與hvdc的耦合程度、直流輸送功率水平，換流閥觸發角大小以及控制器參數等因素對系統電氣阻尼的影響。
  12. A circuit or device that converts a dc input voitage to a regulated output woltage, the output voltage may be lower, higher or the same as the input voltage, switching - regulator dc - dc circuit most often require an inductor or transformer to achieve t - he regualted output voltage, wwitching fegulator circuits can achieve a higher level of power efficiency whec compared to non - wwitching techniques

    指一電路或儀器可將一直流輸入電壓換成一高速過的輸出電壓，此輸出電壓可為較低，較高或輸入電壓相同，互動式直流對直流調整電路通常需要一電感或變壓器以達到所要的輸出電壓，交換式調整電路和非交換式技術比有較高的功率效率。
  13. Type example : a project need functions of control temperature instrument are : single screen display communication mode with up - level machine is rs - 485, transmit field temperature to standard dc ma signal output, with 2 relays control output sensor is k thermocouple, outline dimension is 9696

    型號舉例：某工程需控制溫度儀表功能為:單屏顯示與上位機通訊方式為rs - 485將現場溫度轉換成標準的dc 420 ma信號輸出另帶2個繼電器控制輸出傳感器為k型熱電偶外形尺寸為9696 。
  14. The main work has been finished in paper is below : 1. all kinds of structure of low - voltage op - amp were compared and analyzed, such as the three - times current, redundant difference pair, dc level shifter input stage, large current output, very low - voltage output stage. 2

    對國內外的相關研究動態做了廣泛的調研，仔細比較了各種實現電路的優缺點，如輸入級的三倍電流鏡法、冗餘差分對法、電平移位法等，輸出級的大擺幅輸出級、超低電壓輸出級等。
  15. Quivering palm dc continues to increase ( dc = 10 + 0. 5 * class level + wis modifier )

    金剛魂將繼續得到增強（法術抗力= 10 +武僧等級） 。
  16. The reason causing the variations of capacitors ' voltage of three - level voltage source inverter at dc side

    引起三級電壓源逆變器直流側電容電壓變化的原因
  17. Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent

    本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。
  18. Fixed capacitors for use in electronic equipment - part 23 - 1 : blank detail specification - fixed surface mount metallized polyethylene naphthalate film dielectric dc capacitors - assessment level ez

    電子設備用固定電容器.第23 - 1部分:空白詳細規范.表面安裝的金屬化聚乙烯苯二甲酸鹽膜介質直流固定電容器.評定水平ez
  19. The switches of the two - level leg suffer the input voltage and can realize zero - current - switching ( zcs ) in a wide load range, so the igbt can be adopted. the voltage across the output filter is a tl waveforms, which reduces the output filter. the input current of hfb tl converter is nearly a dc current, which reduces the input filter

    復合式全橋三電平變換器不僅可以將開關管電壓應力減小一半，大大改善輸出濾波器工作條件的優勢，還可實現所有開關管的全負載范圍軟開關，本文詳細分析該變換器的工作原理、參數設計、控制方案，並進行實驗驗證。
  20. Extensions to standard test interface language ieee std 1450 - 1999 for dc level specification

    Dc等級規范用標準測試介面語言的擴展
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