dc ac converter 中文意思是什麼
dc ac converter
解釋
直粱齡換機-
Sliding - mode current control of three - phase ac dc converter
變換器的滑模電流控制 -
From the viewpoint of electrical damping, this dissertation focus on the damping analysis of subsynchronous oscillation for different systems, such as hvdc system, hybrid ac / dc system and multiple - converter hvdc system
目前，直流輸電技術已經在我國得到了廣泛的應用，並且在今後的幾十年中，直流輸電在我國還將有更為廣闊的應用前景。 -
With the development of power electronics technology and devices in recent years, instead of using the industrial frequency transformer to boost voltage, dc / dc high frequency converter achieves the function. the system has higher power density and conversion efficiency, and the size, weight, ac noise of which has been greatly reduced
近年來，隨著電力電子技術與器件的迅速發展，使用dc dc高頻變換技術代替工頻升壓，系統具有較高的功率密度與轉換效率，裝置體積、重量與交流噪聲大大減小。 -
The thesis includes two parties : research on 2kw multi - function ac excitation power and study on high voltage high power ( hh ) dc / dc full - bridge converter
論文包括兩個部分： 2kw多功能交流勵磁電源研製和高壓大功率dc dc全橋變換器研究。 -
This paper mainly describes the small signal model and properties of the dc / dc converter, the optimum control model of the dc / ac inverter and analyses the stability and dynamic characteristics of the system. the experimental results show that the static inverter achieves high performance target
本文主要對6kva電源變換器系統進行了分析，包括前級dc dc變換器的小信號特性，后級dc ac逆變器的最優控制模型，分析了系統的穩定性和動態性能，模擬和實驗表明該電源變換器具有高的性能指標。 -
Research on a novel control method of a hf link dc ac converter
勵磁控制下抽水蓄能電機靜止變頻器起動研究 -
The principle of ac - dc - ac locomotive is that transformer transforms the high single - phase ac voltage from contact system to lower ac voltage first, then rectifier transforms this ac voltage to steady dc voltage, finally converter transforms this dc voltage to three - phase vfvv ac voltage as the voltage source for asynchronous machine
交?直?交型電力機車系統的原理是：先將從接觸網獲得的單相交流高電壓經變壓器降壓后，再經整流器變換為平穩的直流電壓，直流電壓經逆變器變換為三相交流電壓，供給機車輪對上的牽引電機。 -
The principle of operation, the selection of snubber circuit, the design of the coupling inductor and the relationship between the dc / dc and dc / ac converters are illustrated and verified on a 1kw experimental circuit. a two - stage dc / dc converter consists of a boost and ppfc is presented in this paper through further research
文章詳細分析了電路工作過程，給出了緩沖電路的選取原則及耦合電感的設計，討論了該ppfc與后級dc / ac逆變器連接工作時的相互影響，並通過模擬分析和一臺1000w實驗樣機進行了原理驗證。 -
According to the space vector modulation method of the equivalent structure of the ac - dc - ac transformation, the transformation relations of the matrix converter are deeply investigated. the ac - ac direct conversion control and the double - space - vector pwm scheme of the matrix converter are deduced, the four - step current commutation strategy of matrix converter is expatiated, the design method of input filter and over voltage protection circuit is analyzed, and the modeling and simulation of a three - phase matrix converter are implemented
從等效交-直-交變換的空間矢量調制方法出發，深入分析了矩陣式變頻器的變換關系，導出了交-交直接變換控制規律和雙空間矢量脈寬調制技術，闡述了矩陣式變頻器的換流控制策略，分析了輸入濾波器和過電壓保護電路的設計方法，實現了矩陣式變頻器的建模和運行分析。 -
Besides these, it is capable of performing frequency conversion with sinusoidal output voltages and currents at the desired output frequency and allows bi - directional power flow according to the space vector modulation method of the equivalent structure of the ac - dc - ac conversion, the conversion relations of the matrix converter were deeply investigated. the ac - ac direct transformation control and the double - space - vector pwm scheme of the matrix converter were deduced and the modeling, sin ~ iu1ation and experiment of a three - phase matrix converter were implemented
本文從等效交一直一交變換的空間矢量調制方法出發，深入分析了矩陣式變換器的變換關系，推導出了交一交直接變換控制規律和雙空間矢量pwm調制技術，實現了交一交直接變換控制方式下矩陣式變換器的建模和運行分析，並進行了計算機模擬和實驗研究。 -
Comparing with the ac - dc - ac converter, the commutation process of a matrix converter ( mc ) is more complicated due to having no natural free - wheeling paths
摘要由於矩陣變換器（ mc ）電路沒有續流路徑，它的換流過程比交直交變換器更為復雜。 -
On the bases of detailing the control theory and circuit of dc - ac converter, this paper introduces the fuzzy logic theory into the control of the digital pwm converter. in order to realize the control strategy, intel high performance micro controller 80c196kc, the kernel of the intelligent controller are purposed
本文在討論逆變器控制理論和控制電路的基礎上，將模糊控制理論引入到數字式pwm型逆變器的控制中，設計了以80c196kc為核心的智能控制器，用新型的基於eprom存儲的pwm電路給予實現的硬體電路。 -
Uninterruptible power system ( ups ) has power storage parts, an ac / dc converter and a dc / ac inverter as major components
Ups （ uninterruptiblepowersystem ） ，即不間斷電源，是一種含有儲能裝置，以逆變器為主要組成部分的恆壓、恆頻的不間斷電源。 -
The thesis presents a group of direct ac / ac topologies including single and three phases ac / ac converters which are based on simple dc - dc topologies and realized by using the single - power tube four - quadrant switches. with only two power switches, these single or three phases ac / ac converters can achieve high quality four - quadrant ac / ac conversion by simple configurations and simple control schemes. the thesis mainly researches on the single phase ac / ac converter in the topologies including ac _ buck and ac _ cuk
本文介紹了基於直流buck 、 boost和cuk電路，採用單有源四象限開關實現功率雙向化的直接ac / ac變換拓撲族，該拓撲族中的單、三相變換電路均只使用兩個功率開關，可實現波形優良的同頻ac / ac四象限變換，具有電路結構簡單、控制簡便、可實現小型化等優點。 -
First, variable speed constant frequency wind energy convertion theory is described in this paper, then presents a review on the development of wind turbines control and the main types of generator and static converters used to interface variable speed wind turbines to the electric grid. then discuss main circuit constructure and advantage of direct drive wind energy conversion system and introduce pitch - control method for wind power traction and electric power stability. simply aerodynamic characteristic of the turbine is analysised and permanent magnet synchnonous generator math model is established. to convert the variable frequency electricity into utility grid, back to back four - quadrant pwm - vsi is used and three typies of control strategy is presented to capture the maximum wind energy and transmit energy. then simulation is implemented to test the control strategy. in the following chapter a simple ac - dc - ac converter with a dc - dc boosting chopper is proposed to transmit the wind energy into electricity energy and two control strategy is presented
建立了永磁電機和變流器的數學模型，針對雙pwm變頻器的特點提出了三種控制策略對變流器進行控制，通過變流器交-直-交的變換，將發電機發出的變頻變幅值交流電轉化為可用的恆定頻率的交流電，通過pwm調治能使其輸出功率因數為一，並且該控制系統功率因數為可調，能在特殊情況下同電網交換一定的無功功率，並通過對變流器的控制實現了最大風能俘獲的功能。最後採用matlab / simulink進行了模擬，取得了良好的模擬效果。在風力發電系統中，採用先進的最大功率俘獲演算法，能有效的從風中獲得最大的能量。 -
According to the practice on gezhouba to shanghai hvdc transmission project and in consideration of condition on three gorges hvdc project, some suggestions on protection of overvoltage and insulation coordination for outer insulation, against pollution - wet, dc neutral bus over - voltage and dc & ac filter are technically presented. it may be a reference in design of three gorges converter station
根據葛南直流工程的經驗並結合三峽工程的情況，在換流站的外絕緣、直流耐污濕技術、直流中性母線過電壓防護、交直流濾波器的過電壓防護等方面提出了過電壓和絕緣配合的技術要求，供設計參考。 -
Design and application of dc ac differential signal source converter
差分信號源變換電路的設計與應用 -
Voltage current control system for common dc link in the ac dc ac frequency converter
交變頻器公用直流母線電壓電流控制系統 -
The steady state and transient characteristics of the aceg system are simulated, the harmonics of the emf and stator current and rotor current as well as mc ' s input current are researched. the operation characteristics of aceg with mc as an exciter are compared to those of aceg with ac - dc - ac converter and cycloconverter as an exciter. the results in this thesis will be helpful to the design of the aceg excitation control system
利用所建模型，對交流勵磁發電機系統的穩態調節特性、暫態特性進行了模擬研究；模擬研究了發電機定、轉子電流和感應電勢及變頻器輸入電流波形，並作了相應的諧波分析；與交-直-交變頻器和交-交變頻器作勵磁電源時發電機的運行特性進行了對比分析。 -
Based on the detailed investigation about the present conditions of polution in yichang and three gorges dc converter stations and its prediction, and concerning the esdd measurement of dc, ac equipment near the three gorges dc converter station, the operating experience and the atmospheric characters of the yichang city, the porper data of esdd of three gorges dc converter station is presented. and further more, presents the related structural parameters of outer insulation of out door dc, ac equiptment
針對宜昌市大氣污染和三峽換流站站址附近污穢狀況，結合三峽換流站附近交、直流設備鹽密測量和運行經驗以及宜昌氣候特徵，提出了三峽換流站適用的等值附鹽密度值，並在此基礎上提出了交、直流戶外設備外絕緣的有關結構參數。
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