• 四象限的
###### 例句與用法
• The inverter using dc / dc converter topology is a four - quadrant converter made up of several dc / dc converters in series or parallel
基于dc dc變換器拓撲逆變器是由數個dc dc變換器串并聯而成的四象限變換器。
• The other is supported by emerson network power co . , ltd as an advanced research project . and this paper mainly introduces how to design and realize a four - quadrant running srd system to control a 3kw srm ( 8 / 6 poles ) based on a dsp ( tms320f240 ) , which uses h - bridge power convertor and power - consumption braking method
本文基于省重點科研項目“開關磁阻電機新型控制及其調速系統”和深圳emerosn網絡能源公司預研部項目，分析討論了如何設計實現一套以3kw的四相( 8 6極) srm為控制對象以dsp為控制核心采用h橋式功率變換器和能耗制動方式的四象限運行srd系統。
• Taking single four - quadrant power switch mode circuit as an example , the operational mode , steady principles , transient voltage feedback control strategy , the auxiliary switching power supply and parallel technology of this kind of converters are investigated . the output characteristic curve and the design for the key circuit parameters are given
以單四象限功率開關式電路拓撲為例，分析研究了這類變換器工作模式、穩態原理與電壓瞬時值反饋控制策略，給出了變換器的外特性曲線、關鍵電路參數、機內輔助開關電源的設計，對電流源高頻交流環節ac ac變換器并聯擴容技術進行了研究。
• Taking no account of the non - uniformity of the detector , this paper analyzed the performance of the traditional four - quadrant angle - measurement algorithm and two other algorithms in calculating the pitch angle and the deflection angle of the incident ray , and also compared the error curve of the pitch angle calculated by each algorithm in the full plane
摘要在不考慮探測器非均勻性影響的情況下，本文分析了傳統四象限測角算法和另外幾種算法在計算入射光的俯仰角和偏轉角時的性能，還比較了在整個平面內各個算法得到的俯仰角的誤差曲面。
• The francies " hydro turbine models are induced , comprising of the linear model based on the model characteristic curves , the linear model based on the internal characteristics description , the nonlinear model based on four - quadrant characteristics and simply analytic nonlinear model . as a result of comparison of these models , it is believed that these models have different traits and the proper model should be selected according to the study purpose and known conditions
歸納介紹了混流式水輪機的模型，包括基于模型綜合特性曲線的線性化模型、基于內特性描述的線性化模型、基于全特性曲線的非線性模型和簡單解析非線性模型等，對這些水輪機模型進行分析比較，認為它們的特點各有不同，應根據研究目的和已知條件來選擇合適的模型。
• Taking single four - quadrant power switch mode circuit as an example , the operational mode , steady principles , transient voltage feedback control strategy of current mode ac - ac mode ac / ac converters with high frequency link are investigated . the output characteristic curve and the design for the key circuit parameters are given
以單四象限功率開關式拓撲為例，分析研究了電流源交?交型高頻環節ac ac變換器的工作模式、穩態原理與電壓瞬時值反饋控制策略，給出了變換器的關鍵電路參數的設計準則和變換器的外特性曲線。
• 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
本文介紹了基于直流buck 、 boost和cuk電路,采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。
• These topologies of inverters are composed of two bi - boost dc / dc converters , they are symmetry . so whole circuit turn into four - quadrant converters , we can control every power mosfet on or off . then we can get sine wave with direct current polarization at the left , at the same we also can get sine wave with direct current polarization phase contrast 180 compared of the left at the right
這類逆變器由左右二個雙向boostdc / dc變換器構成,左右二邊是對稱的,所以整個電路構成了一個四象限變換器,我們可以恰當控制各功率管的開、關,使左邊的兩象限dc / dc變換器輸出一個帶直流偏置的正弦波,使右邊的兩象限dc / dc變換器輸出一個相差180度帶同樣直流偏置的正弦波形,這樣,負載zl上的電壓是左、右兩個dc / dc變換器電壓的差動輸出,正好可以消掉直流偏置,最終在負載r1上得到的就是正弦波。
• 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