traction current 中文意思是什麼

traction current 解釋
牽引電流
  • traction : n 拖曳，拖拉，牽引；牽引力；〈比喻〉吸力，魅力；【醫學】（對于肌肉等的）牽引（術）；〈美國〉市內...
  • 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。
  1. Comparing to gearless traction machines, kaide series enjoy 40 % less starting current, 12 % more efficiency and physical size installation, which offer lower cost of the overall elevator configurations, such as reduced number of pilot wheels and steel ropes, and associated installation cost and trouble

    相較無齒輪曳引機，啟動電流降低40 % ，效率提高12 % ，又可1 ： 1安裝，降低了整梯的配置成本（減少導向輪、鋼絲繩的數量） ，節省了安裝費用及相應麻煩。
  2. Railway fixed equipment. high speed unipolar circuit - breakers for direct current traction systems 750, 1500 and 3000 volts. characteristics and tests

    鐵路固定設備.直流電壓為750 1500和3000v的牽引設備的高速單極斷路器.性能和試驗
  3. The dark - gray traction current deposits belong to internal - tide deposits, it develops sandstones and siltsands, and charactered with lenticular, wave, flaser bedding, bimodal cross - bedding and ripple mark

    深水牽引流沉積為內潮汐沉積類型，巖性為細砂巖、粉砂巖，以發育透鏡狀、波狀、脈狀層理、雙向交錯層理、波痕等沉積構造為特徵。
  4. At present, differential protection is often used as the main protection for traction transformers. however, the existing of certain factors, such as magnetizing inrush, over - excitation, ct saturation and mismatching of ct ratio, will result in that it is hard to distinguish state current and fault current, and differential protection misoperation or maloperation, then secure operation of electric railways system will be threatened

    目前，牽引變壓器通常採用差動保護作為主保護，但是在某些因數的影響下差動保護並不能準確的區分牽引變壓器內部故障或非內部故障，如故障電流與變壓器處于勵磁涌流、過勵磁， ct飽和及ct變比不匹配等情況下的狀態電流就很難準確的區分，可能造成保護誤動或拒動，從而危及整個鐵道電氣化系統的安全運行。
  5. Proceedings in the case of interference on telecommunication installations by electric power installations ; interference by alternating current traction systems

    電力設備干擾通信設備的應對措施.第3部分:交流電牽引
  6. Electric traction ; wires for earthing and return current

    電力牽引.接地線和迴流線
  7. Railway applications - rolling stock - combined testing - part 2 : chopper - fed direct current traction motors and their control

    鐵路設施.機車車輛.聯合試驗.第2部分:斬波器供電直流牽引電動機及其控制設備
  8. Industrial frequency traction current may interference fsk signal. the electric parameters of track circuit must be measured periodically to make sure whether track circuits and signal equipment run normally and to avoid accident

    定期檢測軌道電路的電壓、頻率等參數，以判斷軌道電路及其信號設備是否處于最佳工作狀態，可以及時消除隱患，確保鐵路安全行車。
  9. Current tester based on the unbalanced traction current of pda wireless

    無線不平衡牽引電流測量儀
  10. The emulational calculating theories of traction power supply system ' s operating charts combine with actual things of engineering design at present in chapter three, to set up traction web current distributing mathematical model, integral distributing mathematical model, locomotive distribution and obtaining current model at every moment, and on which making use of mathematical planning methods to set up mathematical models is based at every moment in every instance interval of the railroads. for instance, instantaneous current, instantaneous voltage descent and effective current, main changing capacity and so on, in addition, there are the minimum power shortage model, the optimal transformer substation location, the least engineering expenditure, the optimal mathematical model of traction power supply system. optimize design ' s algorithm of traction power supply system is introduced in detail in chapter four, where programming idea and realizing method of the computer software are given an explanation

    本研究主要進行了以下工作：結合牽引供電系統運行圖的模擬原理和現行工程設計的實際情況，建立了牽引網電流分佈、積分分佈、任一時刻機車分佈和取流的數學模型；應用數學規劃方法建立了任一距離區間、任一時刻的瞬時電流、瞬時電壓降數學模型和有效電流、主變容量和主變壓降、最小功率損失、最佳變電所容量、最佳變電所位置、最少工程費用、最少運營維護費用和牽引供電系統方案最優等方面的數學模型；闡明了牽引供電系統優化設計的演算法和計算機軟體編程思想及實現方法；進行了工程實例計算；最後，對牽引供電系統優化設計技術應用進行了總結。
  11. In accordance with the driving characteristics of ac driving locomotive, the working status of its traction transformer is analysed. the questions that should be considered in the traction transformer design of ac driving locomotive are mentioned. these questions are the large short - circuit impedance of traction winding, higher harmonic current, over - excitation and dc magnetization caused by large variation of the network voltage, etc. some disposal methods are given

    針對交流傳動電力機車的傳動特點，對其中的牽引變壓器的工作狀態進行了分析，指出交流傳動電力機車用牽引變壓器設計時需考慮的牽引繞組的短路阻抗大、電流的高次諧波、網壓波動大可能引起的過勵磁以及直流磁化等問題，同時給出了相應的一些解決方法。
  12. Electric traction - rolling stock - combined testing of inverter - fed alternating current motors and their control

    電力牽引.鐵路車輛.反向供電交流電動機及其控制的聯合檢驗
  13. Impedance - matching balanced traction transformers ( balanced transformers in this paper for short ) are step - down transformers, they transfer symmetrical three phase voltage in primary side to perpendicular two phase voltage in secondary side. they are different from any other transformers, so their short - circuit current analysis and short - circuit test method must be taken into special account

    阻抗匹配平衡牽引變壓器（本文中簡稱平衡變壓器）是一種將一次側三相對稱電壓變換為二次側二相垂直電壓的降壓變壓器，它不同於已有的任何一種變壓器，短路電流的分析計算和短路試驗必須予以重新研究。
  14. Tangyin substation is an important substation which has two transformer of 120mva, eight 220kv lines and three 110kv lines. tangqian line is a 110kv line specially for traction transformer substation. because traction load is high - power nonlinear and asymmetry. it will produce much harmonic and negatvie sequence current, which have done harm to compensation capacitors of tangyin substation. in recent years, the tang6c capacitor often interrupted and in 2001 july the tang7c capacitor ' s discharge pt exploded

    湯陰變電站是豫北一座樞紐變電站，有2臺120mva的主變， 8條220kv線路和3條110kv線路，其中的湯牽線是專為牽引變電站供電的110kv線路。由於電力機車屬于大功率的非線性負荷，且三相不對稱，在其運行過程中必然會產生較大的高次諧波和負序電流。
  15. Precambrian madiyi formation in banbianshan, taojiang of hunan province is consisted of deep - water gravity flow deposits, deep - water traction current deposits and deep - water in situ deposits

    摘要湖南桃江半邊山前寒武紀馬底驛組為一深水重力流沉積、深水牽引流沉積與深水原地沉積共生組合。
  16. Electrical traction - rotating electrical machines for rail and road vehicules - part 1 : machines other than electronic convertor - fed alternating current motors

    電氣牽引.有軌和道路車輛用旋轉電機.第1部分:除電子換流器供電的電機以外的機械
  17. It is necessary to study the mechanism of harmonics generation, make sure the content and distribute of harmonics current in order to alleviate their harm to traction power system ' s component, equipments of protect and measure as well as other customer ' s electronics equipments

    為了從根本上抑制電力牽引負荷諧波帶來的影響，削弱諧波對牽引供電系統主元件、保護測控裝置和其他用戶電子設備的影響，有必要研究電氣化鐵道牽引諧波產生的機理，確定饋線電流諧波的含量與分佈狀況。
  18. The two rails are not only signal lines of track circuits, but also loop current line of locomotive traction current in electrified railway block

    在電氣化鐵路區段，兩條鋼軌既是移頻信號的傳輸線又是機車牽引電流的迴流線。
  19. The content of this theme is as follows : without time, without open, without stopping railway transport, and without interrupting traction current of block tested, meanwhile track circuit parameters in electrical and no electrical blocks is measured of on - line, dynamic and real - time. these parameters include voltage of fsk signal, voltage of industrial and harmonic wave interference, upper frequency, lower frequency, carrier frequency and low frequency 18 messages frequency

    本課題研究內容：在不要點，不開天窗，不中斷行車，不中斷被測區段牽引電流的情況下，在線、動態、實時測量電化區段和非電化區段的移頻信號電壓、工頻干擾電壓，移頻信號（調頻信號）的上邊頻、下邊頻、載波頻率、以及低頻18信息頻率等參數。
  20. The behavior principle of ddl protection for dc feeder in dc traction current supply system and the setting principle of protection parameters are introduced and illustrative examples are given

    摘要介紹直流牽引供電系統中直流饋線ddl保護的動作原理，以及保護參數的設定原則，並舉例說明。
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