grid drive 中文意思是什麼
grid drive
解釋
柵極激勵-
Mp3 cataloger - here is a simple disk scanner ; this scans the selected drive for mp3 files and list them along with information about them on a grid
這是一個簡單的磁盤掃描器；它掃描選定的驅動器來搜索mp3文件，並在網格中將它們和信息一塊列舉出來。 -
Influence of electric grid voltage fluctuation on main motor drive system for four - high medium plate mill and its solution are introduced
摘要介紹了電網電壓波動對中板四輥軋機主電機傳動系統的影響和解決方法。 -
Here is a simple disk scanner ; this scans the selected drive for mp3 files and list them along with information about them on a grid
這是一個簡單的磁盤掃描器；它掃描選定的驅動器來搜索mp3文件，並在網格中將它們和信息一塊列舉出來。 -
Beginning with the problem of interlaced region between farming and herding, the boundary line of the interlaced region is calculated based on grid with 10km grid ; then the relation among land use of the region, soil erosion and erosion region is analyzed ; based on factor classification, no useful factors were neglected and stepwise regression method was used to analysis the drive of land use change ; fractal method was applied to analysis the degradation of land - use and relation among land use, soil erosion and wind - water erosion zone ; environmental variances are introduced to establish characteristic index of land use change and analysis the effect of land use change on soil erosion
從農牧交錯帶的實質問題入手，基於10公里網格，計算農牧交錯帶的界限；在此基礎上分析農牧交錯帶的土地利用、土壤侵蝕及與風水侵蝕帶的關系；在因子分層的基礎上，剔除不需要因素，採用逐步回歸的方法，進行土地利用變化驅動力分析；運用分形方法分析土地利用的退化，並分析土地利用與土壤侵蝕的關系，引入環境變量，建立土地利用變化特徵指數，分析土地利用變化對土壤侵蝕的影響。 -
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。 -
Nico rosberg brought the sister car home, but could only muster 14th place after starting from the rear of the grid and struggling throughout with a car that was difficult to drive
尼科-羅斯伯格把自己的賽車開回了終點，從發車區尾部發車的他只能拿到第十四名的成績，而整場比賽他都一直和這輛難以駕駛的賽車糾纏著。 -
The rigid shaft model and flexible shaft model of the drive train based on the spring - mass - damper system are used to analyze the dynamics of the drive train. a sample grid - connected 300kw hawt is simulated using the analysis method
在此基礎上以並網型300kw水平軸風力機為分析對象，對其傳動系統在紊流風場作用下的動力學性能進行了模擬計算並分析了計算結果。
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