相逆 的英文怎麼說
中文拼音 [xiāngnì]
相逆
英文
depart-
In this article, a new algorithm, algorithm for slicing stl model by seriatim incising triangles is brought forward, it accomplish matching of triangle and plain by the method of finding slicing plains according to triangles. the algorithm for slicing stl model by seriatim incising is made up of two sub algorithms
本文提出的分層演算法則採用與之相逆的思路? ?基於stl的逐三角形分層演算法，在求交線時，用為三角形尋找分層平面的方式確定三角形與分層平面的相交關系。The hydrodynamic experiments with countercurrent flow of gas and liquid simulating the flow conditions in the lower zone of the blast furnace were carried out in a packed bed to clarify the gas pressure drop characteristics in that zone
摘要為了闡明高爐下部氣相壓降的特性，在填料床內模擬高爐下部流動條件進行了氣液兩相逆流的流體力學實驗。The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system, and simulator program of dynamic and steady condition is established, which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system, a comparison is made between predicted and experimental characteristics, experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion, harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched, which cancelled the low harmonic and improve the system performance
通過對電機的kron變換和對稱分量變換，建立了系統較精確的數學模型，編制了系統動態及穩態運行的模擬計算程序分別計算系統的動態和穩態性能。通過對系統的具體參數進行了模擬運算和實驗研究，實驗和模擬結果進行比較，說明實驗和理論較為一致，並從系統效率、轉矩脈動及兩相逆變器電容的影響等方面與各種逆變器和單相異步電動機組成的變頻調速系統加以比較。在此基礎上，對兩相逆變器供電-異步電動機系統使用諧波抑制pwm控制進行了研究，由於減少了低次諧波，改善了系統性能。The protection system can deal with the following motor faults : heavy over - current, over / under - voltage, over - current, current unbalance protection, repeated startings, earth fault and so on
在此基礎上實現了針對過載、堵轉、短路、斷相、逆相、相不平衡等故障的保護。On the aspect of experiment, the investigation has been carried out from simple to complicated, i. e. started from the single pulse and double pulses test of phase module, and then to consecutive - pulse chop test, and then to three phase inverting test
在試驗研究上，採用了由簡到繁，由易到難的策略，從相構件模塊的單、雙脈沖開關試驗入手，經過模塊的連續脈沖斬波試驗，再到三相逆變試驗。Different power circuits and control strategy of the single phase inverter in parallel condition are first analyzed, and half - bridge inverter is selected as the power circuit and current hysteresis control is selected as the control strategy
本文首先對單相逆變器的主電路結構和控制電路的結構在並聯條件下進行了比較分析，最後選用了半橋結構的主電路和內環為滯環控制的瞬時電壓電流雙閉環反饋控制方式。Adverse title to land
相逆土地業權Same phase inverse parallel connection ' s three - phase bridge thyristor rectifier assembly was researched mainly the application in the chlorine - alkali industry
本論文主要研究了同相逆並聯三相橋式晶閘管整流裝置在氯堿工業中的應用。In order to the requirement of the full - bridge shift - phase control it designs the pwm wave engender which bases on epld. the pwm wave engender improves the static precision and dynamic speed of the whole control system
為滿足單相全橋移相逆變器的軟開關工作條件，本文重點開發研究了由epld構成的pwm波形發生器，使得整個控制系統的控制精度和動態響應速度大大提高。A direct iteration method in solving normal equations by means of bidirectional asynchronous integral has been successfully exploited, so that it can efficiently overcome the difficulty in solving two - point boundary value problems resulting from inverse stability between state equation and co - state equation
文中提出雙向異步積分迭代求解正則方程組的直接迭代法，較好解決了狀態方程和協態方程穩定性相逆給求解兩點邊值問題帶來的困難。For some complicated cases which involve conflicting views andor unresolved issues, the responsible dpo will take proactive actions, including, as necessary, convening meetings with concerned departments and those who have made the submissions, coordinating and resolving conflicts prior to replying as far as possible within the specified time limit
對於一些涉及相逆意見及或難以解決的復雜個案，負責的地區規劃專員會盡可能在指定時限內，積極採取行動，包括在有需要時與有關的部門及呈交文件的人士開會商議、居間協調和解決紛爭，然後始作出答覆。On the base of the research result mentioned above, a novel three - phase combined asi is proposed hi this paper, which is made up by three single - phase asi
在以上對單相逆變器研究工作的基礎上，進一步研究了正激直流環節三相組合式軟開關逆變器。In this paper, a novelty space vector pulse width modulation ( svpwm ) technique for the two - phase inverter - fed asynchronous motors system is proposed, which can be widely employed in the low or middle power level field
本文研究了兩相逆變器-異步電動機系統的svpwm控制技術，該系統可以廣泛應用於小功率、寬調速運行的場合。This paper study a two - phase inverter - fed induction - motor drive, which can be widely used for low - power, variable speed drive system. the study has completer the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use. it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of singlechip controller, power drive device, inverter - fed device, a low power tow phase induction motor and safeguard circuit
本文研究了一種新型電壓空間矢量控制兩相逆變器?異步電動機的變頻調速系統，該系統可以廣泛應用於小功率、寬調速運行的場合。本項研究完成兩相逆變器的設計，並組成了試驗用的兩相逆變器?異步電動機系統。系統是一個轉速開環的變頻調速系統，由單片機機控制電路、功率驅動電路、逆變器主電路、保護電路組成。Switching loss and efficiency of the proposed resonant pole zvt three - phase pwm inverter are analyzed and discussed. results of calculation and testing of the prototype together with a hard - switching inverter with the same specification show that an improvement of 2 % ~ 3 % is obtained. based on the analysis of drawbacks of existing svpwm technique in resonant pole zvt three - phase pwm inverters, several improved svpwm methods are presented
對提出的諧振極零電壓過渡三相pwm逆變器的開關損耗和工作效率，進行了深入的分析和討論，並針對原理樣機進行了理論計算和實際測量，並與相同規格的硬開關三相逆變器進行了對比研究，結果表明，採用提出的軟開關技術的原理樣機的效率可以提高2 % 3 。Comparison research verifies its effectiveness on reducing the de - link losses and improving the output performance. the three topologies mentioned above are all presented with detailed theoretical analysis, parameters design, simulation and experimental verifications. a 6kw three - phase inverter system is accomplished in order to verify that the two - amplitude control technique is fit for high power application
第五章研究三相逆變系統的雙幅諧振直流環節技術，完成了6kw實驗系統，提出了滯環電流控制與空間矢量調制相結合的方案（ hcc - svm ）並首次採用cpld實現邏輯控制，大大降低了逆變器換流頻率，縮短了控制延時，實現了逆變器的高效變換和低輸出失真。This thesis introduce the design of dsp control for three phase inverter, witch includes digital realization of pwm control, digital pll, swap control between inverter and utility, and communication with mcu. base on inverter model, inverter output l - c filter is investigated, and double - loop control scheme with tms320lf240 are selected
本文主要介紹了基於dsp控制三相逆變器系統的總體設計方案，其中包括spwm控制的數字實現、逆變器輸出電壓的數字鎖相、逆變器與旁路間的切換邏輯及逆變器與上位機的通訊。Simulator program is designed and the simulated waveforms of the voltages, currents, speed and torque are shown using this method of svpwm
編制了系統模擬程序，給出svpwm控制，兩相逆變器?異步電動機系統樣機的電壓、電流、轉速、轉矩模擬波形曲。This paper mainly studies the parallel technology of the single phase inverter and presents a parallel strategy in which there is no power line connection but digital line connection among the inverter modules. this control strategy can be easily realized and the control effect is good
本文主要研究單相逆變器並聯控制技術，在所提出的逆變器並聯控制策略下各並聯模塊間只有數據連線，無模擬連線，而且控制簡單，環流抑制效果較好。Investigations on soft - switching three - phase inverters are overviewed, generalized, and evaluated, and the key problems on novel soft - switching three - phase pwm inverters are discussed in detail
在對軟開關三相逆變器研究現狀系統綜述、歸納和評價的基礎上，對新型軟開關三相pwm逆變器的關鍵技術問題進行了深入研究。分享友人