最低過電壓 的英文怎麼說
中文拼音 [zuìdīguòdiànyā]
最低過電壓
英文
minimum overvoltage-
First, a simple discussion for the mechanism about electrostatic atomization of the liquids has been given ; then the paper theoretically analyzed waving course, liquid drop producing course, and the liquid drop diffusing course in electrostatics atomization process., gave an analysis about the methods about carrying charges to the liquid drop, and analyzed that liquid with high electrical conductivity can be carried charges and atomized by electric field, while the isolated liquid with low electrical conductivity can be charged fully with the soakage electrode and inducing charge methods. at last the paper designed and configured the experimental equipment, conducted the atomization experiment to the three liquid medium - kerosene, emulsifier and alcohol under the same environment, handled the experimental results, then summarized the relationship between liquid electrostatic atomization effect and liquid surface tension, electronic conductivity and viscosity, along with the influence of voltage to electrostatic atomization and so on, found out the liquid atomization rule in high voltage electrostatic field
首先，對液體介質的靜電霧化機理作了初步的探討，理論上分析了液體霧化過程中射流區、波紋區、霧滴區和霧滴擴散區;然後對液體荷電方法進行了研究分析，對于高電導率的液體，場致荷電和接觸荷電可以使其霧化，而對于電導率較低的絕緣液體，需用浸潤電極荷電和感應荷電方法使其充分帶電;最後，根據前面的研究分析，設計和組裝試驗裝置，在同一環境下對煤油、乳化劑、酒精三種不同液體介質進行高壓靜電霧化試驗，並對試驗結果進行分析處理，總結出液體靜電霧化與液體表面張力、電導率和粘度的關系及電壓對液體靜電霧化的影響等，得出高壓靜電場中液體霧化的一般規律。In view of this situation this article has conducted research to the design of metallurgy auxiliary biography with the frequency conversion table electrical machinery first multianalysis to the frequency changer and the frequency conversion table electrical machinery movement characteristic is carried out, the voltage waveform harmonious which the frequency changer outputs is big, attacks in a big way, and the voltage climbing rate reaches as high as 6600v / mu s which is 20 times ordinary sine alternating voltage, the rolling mill auxiliary biography table set the extremely strict request to the electrical machinery ; its movement frequency is very low, rate frequency in 8 - 20hz ; the velocity modulation scope is wide, the lowest movement frequency lowers to 1hz, and the starting number of times is quite frequently, each hour reaches as high as 600 - 800 time, the impact shoulders in a big way, the overload capacity request is high
針對這一情況本文對冶金輔傳用變頻輥道電機的設計進行了系統研究。首先對變頻器和變頻輥道電機的運行特性進行詳細分析，變頻器輸出的電壓波形諧波大，沖擊大，電壓上升率高達6600v / s ，是普通正弦交流電壓的20倍;軋機輔傳輥道對電機提出了十分嚴格的要求:其運行頻率很低，額定頻率在8 - 20hz ;調速范圍寬，最低運行頻率低到0 . 5hz ，起動次數相當頻繁，每小時高達600 - 800次，沖擊負荷大，過載能力要求較高。In 2004, koslo started business cooperation in china, which was the largest electric brand of foreign investment in china. there were two asian production bases in china respectively producing electric, lighting, net intelligence and low voltage electric accessories. in order to ensure the quality of products and enable each product to go beyond the market expectation, the production process were supervised by senior technical experts of koslo headquarters
卡西洛電氣2004年與中國建立合作發展的商業關系，是在華投資最大的外資電工品牌，旗下在中國擁有兩家亞洲生產基地，分別致力於電工照明，網路智能事業和低壓電氣附件事業，生產及過程由德國卡西洛總部資深技術專家進行高科技質量監控，保證每件產品的質量，務求每一件從卡西洛集團生產的產品都能超越市場期望In the paper we mainly researched space gainp2 / gaas / ge high efficiency tandem cells " making process by home - made low pressure mocvd technology and new solar concentrators. firstly, we presented reseached and development of solar cells in china and foreign countries ; secondly, on the basis of fundamental priciples and theories, we discussed some factors of influcing conversion efficiency of solar cells, and analysed the i - v output feature of two - junction tandem cells ; then the design concept of gainp2 / gaas / ge two - junction tandem cells was discussed, the detailed aspects of gainp2 / gaas / ge tandem cells epitaxy growth by low pressure mocvd was studied, and some questions on epitaxy growth ( such as crystal qualities, interface stress, element interdiffusion, n - and p - type doping et all ) were solved ; after that, the cell fabrication process was described ; finally, we reseached the hot pressing and mould process technology of an arched line - focus fresnel lens made by pmma, designed and fixed new solar concentrators
本文致力於用自製的低壓mocvd裝置進行cainp _ 2 / gaas / ge空間用高效級聯太陽能電池製作的工藝以及聚光太陽能電池組件的研究。首先，介紹了國內外太陽能電池的研究現狀及應用情況；其次，運用太陽能電池基本原理討論影響電池轉換效率的因素，分析了級聯電池的伏安特性；隨后，討論了cainp _ 2 / gaas / ge雙結級聯電池的結構設計理念，研究了採用低壓mocvd技術生長cainp _ 2 / gaas / ge級聯太陽電池材料的工藝過程，解決了異質材料生長的結晶質量、界面應力、材料互擴散以及材料n 、 p型摻雜等一系列問題；然後總結了級聯電池的后工藝製作；最後，研究了以pmma為材料的菲涅耳線聚焦透鏡的熱壓成型工藝及其模具的加工工藝，設計並安裝完成新型聚光太陽能電池組件。The key items include the car sinking, constant speed characteristics, inspection function, auto relevelling function and level accuracy, etc. the research contents focus on the following three parts : firstly, research on effects of system parameters on car sinking has been completed. secondly, the constant speed performance with the compensation of internal leakage of pump / motor is improved. lastly, research on improvement of the car level accuracy and contrast to that of traction elevators is presented, and the reasons of low car level accuracy of hydraulic elevators are discussed
重點研究了三方面內容：一是研究了停層沉降特性及影響電梯轎廂停層沉降特性的各種因素；其次是通過負載壓力補償液壓泵馬達內泄漏來改善電梯轎廂速度穩定性；最後是液壓電梯平層精度的理論和實驗研究，並與曳引電梯的理論模型進行了對比，闡述了液壓電梯平層精度低的原因，理論探討了影響液壓電梯平層精度的主要因素。In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal, wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station, in which the signal is decomposed into different frequency band, and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source
摘要基於李家峽水電站雙排機組振動的現場試驗研究，並且針對傳統頻譜分析方法傅立葉變換（ fft ）對于非平穩信號已力不從心這一缺陷，利用小波分析方法在時域和頻域上同時具有良好的局部化性質，通過對開停機這一典型非平穩過程信號進行小波及小波包分析，將其分解到不同頻帶內，獲取微弱信息和提取優勢頻率，並對其作振源分析，得出開停機初始時刻因水流不穩均出現強烈的振動現象，且低頻段信號能量最大，開停機過程水流脈動壓力和尾水渦帶擺動是引起定子基礎振動的主要原因。The charging of lead - acid battery, the most widely accepted secondary battery, constrained to technological limitation, mainly adopted traditional charging methods such as constant voltage, constant voltage with current limitation, constant current and etc. those methods may not follow the internal physical and chemical laws within the battery, leading to serious overcharge and gas - generation, and resulting in low - efficiency, time - consumming and prone - to - damage of the charging operation
二次電池中被最廣泛接受的鉛酸蓄電池由於技術條件的限制，其充電主要採用恆壓、恆壓限流、恆流等常規模式，這些充電方法未能遵從電池內部的物理化學規律，大多存在著嚴重的過充電和析氣等現象，並導致充電過程的低效，耗時和易損。The synchronous rectifying and low power sampling technology is used to reduce the power consumption, flexible external loop compensation, error amplifier output clamp are adopted for better system large signal response. the piecewise slope compensation technology is employed to minimize the consequence of over compensation. the sensor resistor is externally connected, which realize output voltage programmable. the overheat protection and under voltage protection modules are integrated in the die to allow the reliable operation of the system
同時，電路設計採用同步整流技術、低功耗電流采樣技術降低功耗，提高轉換效率;採用靈活的外部環路補償技術、誤差放大器輸出嵌位技術以實現良好大信號特性;採用分段斜坡補償技術，消除不穩定因素，並最大程度地減小過補償帶來的問題;採用外接輸出采樣電阻的方式，實現輸出電壓的可編程。The variable polarity power supply circuit uses two stages full - bridge inverter, the former inverter is regarded as a constant - current source with fast dynamic response, and supplys energy for the second one, and the latter one is to produce variable polarity current excellently, and low - frequency pulse current by variable polarity power supply is used to reduce input energy and control the shape of weld bead while welding. a series of high - frequency pulse current is superposed on direct - current - electrode - negative ( dcen ) current through the high - frequency pulse power supply, which is used to compress the arc and improve process of crystallization
其中變極性電源採用二次全橋逆變結構，一次逆變提供快速的響應速率並給二次逆變提供能量，二次逆變提供良好的變極性性能，使輸出能量最優化，並用其低頻電流特性減小電弧線能量，控制焊縫成形;高頻脈沖電源提供的高頻電流疊加在反極性電流dcen上，利用電流的高頻特性壓縮電弧，改善焊縫金屬結晶過程。Basic principle, hardware structure and function of digital ic electrical meter are expounded. the meter not only has the features of low power consumption and low costing, but has the protective functions against over current, over voltage and electricity leakage. principle and calculation methods of electricity power, periodic compensation and precision compensation are also explained in detail
詳細地敘述了數字式ic卡電度表的基本原理、硬體結構和基本功能，該電度表不僅具有低功耗、低成本的特點，過流、過壓及漏電保護功能，而且具有結構簡單、運行可靠、性能價格比高等優點.最後詳細地介紹了電能計量、精度補償、周期補償的原理及演算法的實現Founded in 1946, sepw is specialized in manufacturing low & high - voltage surge arresters, indoor and outdoor high - voltage fuses and disconnecting switches, outdoor expulsion load switches as well as special high - voltage insulators for power transmission & distribution systems. sepw is the cradle of surge arresters and fuses in china and has been standing in the forefront of development for arresters and fuses
上海電瓷廠創建於1946年，是中國最早設計製造避雷器和熔斷器的企業，經過幾代人五十余年的不懈努力，現已成為一家生產電站、輸變電系統各類高、低壓避雷器；戶內外高壓熔斷器；高壓隔離開關、戶外產氣負荷開關及各種特殊規格的高壓電瓷為主的綜合性電器廠。Based on a series of tests and investigations, this paper draws some conclusions as following by processing and analyzing the test data. the minimum icing flashover voltage of composite insulators decreases with the increase of ice amount, and the tendency of it accords with exponential function. however, the relation of the minimum icing flashover voltage with icing water conductivity accords with power function
通過大量的試驗研究工作，對試驗數據進行擬合和分析處理，得到了如下結論： 1 ）合成絕緣子最低冰閃電壓隨覆冰重量的增加而降低，且其下降趨勢符合指數函數規律，與覆冰水電導率的關系符合冪函數規律。Fcd. 3 138g : 4ds outer - thread copper pipe union at both ends of the inlet and the outlet this valve uses the principle of two - stage pressure reducing variation and, when to lower the switch valve, the shock from the water pressure to the valve casing shortens the start time of this valve under the highest medium pressure and makes it with the incomparable superiority of energy saving among the pulse - type electric - controlled valves, combining to increase filtered to regulate the discharge function with machine type
該閥採用二級減壓變化原理，降低開關閥時水壓對閥體等配件的沖擊，提高電磁閥的可靠性和工作壽命，縮短了閥在最高介質壓力下開啟時間，使其在脈沖式電控閥門中具有無可倫比的節能優勢，並在接線上採用密封插件，並增加了過濾器和機械式調節流量功能。In the analog ic, one of the typical circuits is operational amplifier. therefore, the design of low - voltage and low - voltage operational amplifier is very necessary. while realizing low - voltage and low - power, it must be noticed for the implementing of the main function of the circuit. because the low supply voltage affects performances of circuits, it is not very good for just implementing low - voltage and low power but not implementing the good performances
在模擬集成電路中，運算放大器是最典型的電路之一，所以設計低電壓低功耗的運算放大器是非常必要的。在實現低電壓低功耗的過程中，必須考慮電路的主要性能的實現，因為電源電壓的降低將影響電路的性能，只是實現低壓低功耗而不實現良好的性能是不大妥當的。Three phase oil - immersed distribution transformers, 50 hz, from 50 to 2500 kva with highest voltage for equipment not exceeding 36 kv - distribution transformers with cable boxes on the high voltage and or low voltage side - general requirements
最高電壓不超過36kv的設備用的50hz 50 - 2500kva三相油浸式配電變壓器.帶有高壓和或低壓端電纜接線盒的配電變壓器.一般要求Three phase oil - immersed distribution transformers, 50 hz, from 50 to 2500 kva with highest voltage for equipment not exceeding 36 kv - distribution transformers with cable boxes on the high voltage and or low voltage side - cable boxes of type 1 for use on distribution transformers meeting the requirements of bs 7821 - 2. 1
50hz ，最高電壓不超過36kw的由50 - 2500kva的三相油浸配電變壓器.帶高壓和或低壓單側電纜盒的配電變壓器.與bs7821 :第2部分:第2 . 1節的要求相吻合的用在配電變壓器的1型電纜盒The aim is to reduce the reignition rate and over - voltage damage from the perspective of the mechanical characteristics of the vacuum breaker switching shunt capacitor banks
最終的目標是從真空斷路器機械特性方面入手，降低操作並聯電容器組時的重燃率、並減小操作過電壓危害。Fire hazard testing - part 10 - 2 : guidance and test methods for the minimization of the effects of abnormal heat on electrotechnical products involved in fires ; method for testing products made from non - metallic materials for resistance to heat using the ball pressure test
著火危險試驗.第10 - 2部分:著火過程中電工產品受異常熱而產生的最低影響的導則和試驗方法.使用球壓試驗對由非金屬材料製成的產品的耐熱性的試驗方法Fire hazard testing - part 10 - 2 : guidance and test methods for the minimization of the effects of abnormal heat on electrotechnical products involved in fires ; method for testing products made from non - metallic materials for resistance to heat using the ball pressure test ; amendment 1
著火危險試驗.第10 - 2部分:著火過程中電工產品受異常熱而產生的最低影響的導則和試驗方法.使用球壓試驗對由非金屬材料製成的產品的耐熱性的試驗方法.修改件1Based on the simplified principle, the modal shapes of selected structural modes are converted into modal strains. to minimize the calculation error, curve - fitting technique is used in the process. the modal strains are summed together to determine the global distribution of the structure for selected vibration modes so that the position of piezoelectric elements could be optimally determined according to the simplified optimization principle
通過二階中心差分運算將模態振型轉化為模態應變，採用應變曲線擬合方法降低離散誤差，進而將各階待控模態應變進行疊加，獲取系統整體特徵應變分佈情況；最後根據壓電元件位置優化的簡化目標函數，將壓電片的最優位置確定為柔性板疊加模態應變的極值區域。分享友人