整流因數 的英文怎麼說
中文拼音 [zhěngliúyīnshǔ]
整流因數
英文
commutation factor-
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。And at this foundation through the dispersed domine analyse the paper makes a great emphasis on the application of computer aided design and simulation, then designs a series of apfc design and simulation software. this paper takes out a set of designation and simulation on base of actual circuit. the reliable result, output voltage and inductance current which are got from this software are the same as the actual value
本文在對一系列apfc電路設計、模擬分析方法討論比較的基礎上，著重應用離散時域法進行了計算機輔助電路設計和模擬方法的應用探索，以此為基礎設計了pfcexpert功率因數校正電路設計、模擬軟體，針對實際電路給出了整個設計和模擬全過程，通過實驗驗證了該軟體所得到的精確穩態解、瞬態輸出電壓和電感電流，與實際電路輸出基本相同，所建立的電路模型重現了電路的運行過程，反映了電路的實際工作機理。It not only solves the problem of optimized control of the reactive current exchanging among branches, in other words, realizes the auto - tracking to the reactance factor, but also greatly improved the reliability of the system. to design the high voltage line wireless signal acquisition device with self - feed source, we applied electromagnet induction principle and digital communication technique
系統在優化控制技術中採用了電容器補償控制的兩段控制模型，不僅解決了分支線路之問穿越無功電流的最優控制問題，實現了功率因數的自動跟蹤，而且使整個系統的可靠性大大提高。The conventional switching power supply usually use a diode rectifier followed by a bulk capacitor to convert ac voltage to dc voltage, resulting in the pulsating waveform of the input ac line current, low power factor ( generally 0. 65 ) and high harmonic line current
傳統的開關電源設備通常採用二極體橋來進行整流和一個較大的電解電容來進行濾波以實現輸入電壓的交直流轉換，導致輸入電流為一個很窄的脈沖波並含有較多的諧波分量，功率因數變低（通常只有0 . 65 ） 。It is unclear how the mistake occurred or how many of the coins are in circulation, according to the mint statement
造幣廠聲明稱錯印原因和流通數量至今不明，有必要對設備進行技術調整以排除障礙。Methods are explored to improve power factors of ion membrane of the rectifying device through control of the conduction angles
探討了通過對導通角的控制來提高離子膜整流裝置功率因數的方法。The reason to creates this kind of destruction to be very many, the main of them is that the apron partially has not been able fully to display it to eliminate energy affect so causes the ditch bed to wash out, forms flushes the pit, leading to the apron, to guard against flushes the trough and both banks slope protection destruction, for a long time, disappear power design of plunge basin and layout have been focused on disappear power. but not to give the enough value on uses the sea to inundate the section to disappear power and adjust speed to reduced downriver washes out
水閘閘下沖刷破壞的部位絕大多數發生在消力池下的海漫和防沖槽處，造成這種破壞的原因很多，其中很大一部分是由於海漫部分未能充分發揮其消能作用而引起渠床沖刷，形成沖坑，導致海漫、防沖槽及兩岸護坡的破壞。一直以來，人們把消能的研究重點放在消力池的消能設計及平面布置上，而對海漫段消能及調整流速功能研究甚少，至於對海漫加糙水流運動建立數學模型，在國內外還很少見相關的論文資料。With promulgation and obliging actualization of iec 1000 - 3 - 2 etc. international standards, power factor correction ( pfc ) technique become a hotspot of research in power electronics field. based on average current mode, the paper introduce the design and implementation of a fully digital controlled single - phase boost power factor corrector with fast response. the control - loop circuit is realized using digital control and the corrector can tend to unity power factor, lower current harmonics and high transfer efficiency
本文在平均電流模式控制的有源功率因數校正技術的基礎上，設計了一種控制電路基於數字信號處理器（ dsp ） 、主電路採用boost變換器拓撲結構的全數字單相功率因數校正器，用數字電路代替傳統的模擬電路來實現對整個迴路的控制，最終使得校正器具有輸入功率因數接近於1 、低電流諧波以及高轉換效率的特性。It is easily digital realization and fulfil higher power factory. to testify the correctness, the control scheme is simulated using the dynamic simulated tool simulink of matlab 5
本文設計了一個基於高速數字信號處理器（ dsp ）的功率因數整流器系統的硬體平臺，給出了系統軟體設計的詳細流程圖。The input of traditional ac - dc converter is diode - capacitance combined circuit. it ? input current wave presents pulse shape, and the power factor ( pf ) on ac line side is low
傳統的ac ? dc開關變換器輸入端是二極體整流-濾波電容組合電路，其輸入電流波形呈脈沖狀，交流網側功率因數很低。The empirical analysis of data from five selected banks suggested that blr adjustments are largely determined by fed funds target rate fftr adjustments ; changes in liquidity conditions ; the blr - based liability - to - asset ratio of individual banks ; and the level of disequilibrium among blr, fftr and the risk premium of the hong kong dollar relative to the us dollar
5間銀行的數據進行的實證分析顯示，最優惠貸款利率的調整決定因素大致上為：聯邦基金目標利率目標利率的調整流動資金狀況的變化個別銀行以最優惠貸款利率計價的負債與資產比率負債與資產比率，以及最優惠貸款利率目標利率及港元相對美元的風險溢價之間的失衡程度。The design and simulation of the circuit, which is designed to drive a power mosfet with a 500v breakdown voltage and maximum ia operation current, is implemented. the circuit can be used as a pre - regulator for electronic ballast. the ic solution also provides a voltage - regulator with the functions such as undervoltage lockout, and overvoltage protection
設計目的是使電路作為電子鎮流器的前端變換器可以驅動耐壓為500v ，最大工作電流為1a的橫向功率mos ，對整流電路的直流輸出電壓進行穩壓，並實現過壓、欠壓保護，提高用電效率，經過理論分析使經校正後的功率因數達到0 . 95以上。In brushless excitation system, rotating rectifier is likely to occur several faults. but there is not clear linearity relation between the cause of fault and corresponding symptom. and it is difficult to describe their relation with mathematics model
在無刷勵磁系統中旋轉整流器可能出現各種故障，但故障原因和相應的癥狀之間往往沒有明確的線性關系，也就很難距歷g洲精確的數學模型來描述。It can improve the utilize of power by fed back the power generated by motor machine to power - net, has the benefit of improving power factor, reducing the harmonious feeding back to the power - net and can enhance the performance of converters for the constant voltage of dc - link
該裝置能夠提高電能的利用率，把由電動機產生的再生能源回饋到交流電網，並且能提高裝置的功率因數，減少對電網的諧波污染。由於pwm整流，變頻器中間直流環節的電壓能保持穩定，提高了逆變器的調速性能。As a result of employing multilevel phase - shifted method with zig zag connection in transformer secondary, in the primary the current harmonics their orders are lower than 6m 1 are eliminated ( m is the number of power cell each phase ). in the inverter side because of using pulse shifting pwm control, the equivalent switch frequency of output is m times as high as one h - bridge, so the output voltage waveform of the inverter is near sine with less harmonics
對于整流電路，由於採用變壓器移相多重化整流，在理論上可以實現曲折變壓器一次繞組中低於6m 1次諧波電流相互抵消（ m為串聯單元個數） ；對于逆變電路，由於採用移相pwm控制方式，等效開關頻率提高m倍，因此輸出電壓接近正弦波，諧波含量較小。Power factor characteristics of the rectifier is introduced, and control methods for the conduction angles are analyzed
摘要介紹了整流裝置的功率因數的特點，分析了導通角的控制方法。When the conduction angles are controued at 135 ~ 140, power factors of the rectifying transformer can be controlled in the rage of 0. 91 ~ 0. 94
根據系統電壓的變化及時調整整流變壓器的檔位，當控制導通角135 ~ 140時，可以將整流變壓器的功率因數控制在0 . 91 ~ 0 . 94 。The dq equivalent circuit model of three - phase three - switch boost type power - factor - correction is proposed firstly, the completely dc steady - state analysis and ac small - signal analysis are done and the dc operation points and ac transfer functions are acquired
3 .首次提出三相三開關boost型功率因數校正的dq等效電路模型，並對其進行了完整的直流穩態和交流小信號分析，得到直流工作點和交流傳遞函數。Abstract : this paper deals with the simulation result analysis of three phase synchronous generator with rectified output with stator y connected, as well as with stator connected. the curves of overlap angle, displacement angle and power factor with load are presented, and the tendency of these curves are also described
文摘:對整流負載時凸極同步發電機定子繞組及y聯結模擬結果進行分析，繪出反映整流特性的換流重疊角、位移角以及功率因數隨負載變化曲線，並對變化趨勢進行分析。Due to the merits of pollution - free, adjustable power factor and bi - direction power transfer, the pwm rectifier can be an ideal electric appliance or a linkage between grid - line and other electric facilities
由於可以實現電網無污染、功率因數可控以及電能的雙向傳輸， pwm整流器可以作為理想的用電設備或電網與其它電氣設備的介面。分享友人