virtual voltage 中文意思是什麼

virtual voltage 解釋
有效電壓
  • virtual : adj. 1. 實際上的，實質上的，事實上的。2. 【物理學】虛像的。3. 【物理學】有效的；【計算機】（網上）虛擬的。4. 〈古語〉具有可產生某種效果之內在力的。
  • voltage : n. 【電學】電壓，電壓量，伏特數。 the working voltage （電氣的）耐壓限度。
  1. Brings forward the basic network cell model of symmetrical blast vault and asymmetric blast vault. then studies and analyses airflow in vault of main voltage switchyard hall of xiluodu hydropower station which is far cry and large numbers of airflow conflux, brings forward concept of “ virtual embranchment ” and corresponding basic network cell model, regresses calculate expressions of flux uniformity coefficient and impedance of “ virtual embranchment ” of vault of main voltage switchyard hall of xiluodu hydropower station

    而後又採用cfd數值模擬的方法對溪洛渡水電站主變洞排風拱頂這種多股氣流匯流的長距離通道內的氣流流動進行了分析，提出了「虛擬分支」的概念和相應的網路基元模型，並回歸得到了溪洛渡水電站主變洞排風拱頂各個排風「虛擬分支」風量均勻系數以及阻抗的計算公式。
  2. The devices for detecting phase - to - ground fault in ineffectively grounded systems are seldom functionary at present. based on thousands of experiments in high - voltage laboratory in north china electric power university, the reasons for misjudgment and the effective measures to avoid it are presented in this paper : to change pt connection form to prevent from ill - effects of ferro - resonant overvoltage ; to increase soft measures to resist against interference ; to adopt neural network method to obtain the virtual value of the detect way

    依據上千次實驗，我們找到了一些導致選線誤判的影響因素，並提出幾點防止誤判的措施，包括改變pt接線方式，避免鐵磁諧振對選線的影響；通過對故障檢測方式的處理和使用連續判斷技術增強裝置的軟體抗干擾能力；嘗試採用神經網路演算法設定選線方法的有效域等。
  3. The way of fast calculating the virtual value of voltage by pc, the way of calculating the power frequency and power factor

    數據處理技術包括：交流電壓有效值快速計算的原理與方法；電網電壓頻率、功率因數的計算原理與方法。
  4. The control tactics of space voltage vector are investigated, and the simplified algorithm which judges the sector location of reference vector and calculates switch operation time is put forward. by analyzing the current hysteresis control, the relation between switch frequency, and hysteresis bandwidth and input inductance of pwm rectifier is deduced. by applying instantaneous power theory, the principle of pwm rectifier power control is analyzed, and the direct power control by matlab toolbox through estimating active power and reactive power with virtual flux is realized, and the simulation results prove that it is correct

    對常用空間電壓矢量控制策略進行分析，提出了給定參考矢量所在區間判斷的簡化方法，以及電壓矢量作用時間的求取方法；分析了電流滯環控制策略，推導出開關頻率與滯環帶寬以及整流器輸入電感之間的關系；應用瞬時功率理論分析pwm整流器功率控制原理，通過虛擬磁鏈估計有功功率和無功功率，用matlab實現了直接功率控制，並驗證了該控制方法的正確性。
  5. This testing system is based on the pxi bus virtual testing system. there are many secondary types of equipments in the system. such as the programmable power supply, high voltage probe, high voltage relay, high voltage load and pneumatics

    本文以pxi總線虛擬測試系統為核心，輔以程式控制電壓源、高壓衰減探頭、高壓繼電器、高壓放電負載及氣動裝置，分別設計組裝了主機櫃與測試櫃，完成整個自動測試進程。
  6. The chip jk3ce that is one of micro - controllers in motorola 68hc08 family is used as control unit in this system. the zero crossing point of the back emf can be obtained by comparing the terminal voltage with the virtual neutral point, then using the software of the system can figure out the commutation period. the electronic commutation replaces the mechanical commutation in this way

    本系統採用的控制晶元為motorola系列單片機中的jk3ce ，反電勢過零點可以通過比較電機端電壓和虛擬中點電壓來得到，將過零點信號送往單片機捕捉埠後由系統軟體來確定換相時刻，這樣就可以由電子換向裝置替代機械換相裝置，有利於提高系統運行的可靠性，並降低了系統維護的費用。
  7. To increase the voltage according to the test requirements, the plc technology was adopted for the control part of the testing system, and the virtual instrument technology was used to construct the measurement part of the system

    為了按照測試標準所要求的時序加載電壓，採用了plc等現代控制技術實現測試系統的控制過程，並採用虛擬儀器技術構建測試系統的測量部分。
  8. In order to satisfy the real - time measurement, we studied the fast arithmetic of virtual value of voltage and current, power factor

    為了滿足實時檢測要求，研究了計算電壓、電流有效值和功率因數的快速演算法。
  9. In the virtual instrument we programmed, real time monitoring the voltage sags, automatic generating report, querying the malfunction report is realized too

    該系統最終實現了電壓暫降故障的實時檢測、故障報告的自動生成以及故障報文查詢等功能。
  10. The virtual oscillograph to measure voltage is brought into the system. its daq board is based on epp and 8051 is used as the controller

    本系統集成了虛擬儀器完成電壓測量，製作了基於增強并行口epp 、以8051為控制核心完成量程自動轉換的數據採集板。
  11. In order to get suitable algorithms which are accuracy, feasible, practical and convenient to be realized by virtual instrument, this paper firstly analyzes measuring algorithms of major power quality parameters, such as voltage, current, frequency, harmonics, flicker, unbalance factor etc. then two algorithms, the one for basic power quality parameters measurement based on spectrum correction and the other one for flicker measurement based on fft, are presented

    基於虛擬儀器技術的電能質量測試儀應用靈活，升級方便， 「軟體就是儀器」的特色使測試儀各種通用功能和預期功能的方便實現成為可能。文章對電能質量的一些主要指標:電壓、電流、頻率、諧波、電壓波動和閃變、三相電壓不平衡度等的測量演算法進行了分析，尋求適合虛擬儀器實現的，切實可行、計算精確、實用性強的計算方法。
  12. We design a fast calculating amplitude method : obtain two instantaneous voltages at first, after that calculate the current voltage virtual value once we get another instantaneous voltage

    我們設計了一種快速計算幅值的方法，只需先採得兩個電壓瞬時值，之後每采樣一個電壓瞬時值即可求得當前的電壓幅值。
  13. Firstly, design the software phase - closed loops ; secondly, realize the double closed loops control of the instantaneous value and the virtual value. furthermore, the dynamic flux imbalance of the output transformer caused by ordinary pi arithmetic is analyzed in detail. a new solution for flux balance by sampling the instantaneous primary current of the output transformer and introducing the on - line calculated bias current component into the voltage regulation arithmetic is presented

    系統軟體實現了ups的各個功能模塊，首先設計了軟體鎖相環；然後實現了輸出電壓瞬時值和有效值雙閉環反饋控制；並且在深入分析基本數字pi演算法所引起的輸出變壓器動態偏磁問題的基礎上，提出了一種改進演算法，實時消除了變壓器的偏磁。
  14. This paper that illustrating the future vehicles with the next generation of dual voltage system and using software module of multi - purpose in simulation outlines the use of virtual reality for modeling and analysis in the dual voltage system and the sizing of system components ( battery, generator, harness, future loads, fuses ), which can improve the success rate in exploitation of new products

    摘要針對機電系統新產品開發的實際需求和技術瓶頸，將虛擬樣機技術應用於新一代汽車電氣系統的開發過程，並結合該系統開發，在建立相應的功效模型和物理模型的基礎上，以多種支持各部件的性能模擬模塊為工具，形成了一種基於模擬技術的機電系統及其部件的建模和分析的有效方法，從而達到在設計之初就能預測其性能，提高新產品開發成功率之目的。
  15. Labview language is used to program virtual instruments for detecting and analyzing the voltage sags in this paper. the actual running result proves that the entropy - based recursive complex wavelet arithmetic is effectively on analyzing the voltage sags

    最後本文利用虛擬儀器開發軟體labview建立了電壓暫降檢測系統，通過實驗模擬故障，驗證了電壓暫降檢測演算法的有效性。
  16. The design of software is composed of the development of virtual panel interface and the research of algorithm of measuring electric variable. the most popular vc + + 6. 0 is used here to complete the development of the former which concludes the dynamic display of input wave - form, real - time displaying rms, power and power factor, harmonic analysis and measuring the voltage fluctuation and flicker

    其中，虛擬儀器面板界面的開發在目前最流行的可視化編輯工具visualc + + 6 . 0 （ mfc ）下實現，完成了輸入電壓、電流波形的動態顯示，波形頻率、有效值、功率以及功率因數的實時顯示，諧波分析以及電壓波動和閃變的檢測。
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