磁場計 的英文怎麼說
中文拼音 [cíchǎngjì]
磁場計
英文
magnetic field meter-
Boundary element - free method for calculation of electromagnetic field
電磁場計算的邊界無單元法While carrying out the scheme, at first, the basic theory of antenna, array antenna and electromagnetic absorption, the performance parameter of antenna and parabolic antenna are deeply researched. in conformity, the characteristic and calculation of aperture field and near - to - far - field transformation for radiation pattern are detailed analyzed. second, the factors such as, the amount of the antenna elements, mutual coupling between each element, ground and the buildings on earth ' s surface, which affect the performance of array antennas ’ resultant field are stressed discussed
在系統實現過程中，課題首先從天線、陣列天線，以及電磁場計算方法的基本理論著手，分析了天線與拋物面天線的各項性能參數，以及天線的口面場和近-遠區輻射場的特點和計算;進而，更加深入的討論和研究影響天線陣列合成場強的各項因素，包括系統所使用的天線單元個數對陣列合成場的影響、天線單元之間由於互耦造成的影響、傳播過程中地面和/或地面建築物的影響等。Based on the magnetic field data, this paper presents a double - frequency method to separate eddy current lossand hysteresis loss from iron loss, then different methods are used to calculate the two losses separately
在磁場計算所得數據的基礎上，本文提出了採用雙頻法分離出sr電機鐵損中的渦流損耗與磁滯損耗，並分別採用不同的方法計算出這兩種損耗。The subject of this thesis is to study ironless moving coil linear permanent magnet synchronous motor and the major works in this thesis are summarized as follows : 1 ) two analytical formulas are derived by concentrated current method and distributed current method to determine the magnetic field due to pm, based on the current model of pm. besides, two method ( magnetic charge method and solution by laplace equation method ) are also introduced with comparing their advantages and disadvantages. then the effects of the motor parameters on the flux distribution are discussed
本文對空芯動圈式直線同步電動機進行了深入細致的研究，內容包括： （ 1 ）採用電流模型推導出兩種計算永磁磁極二維氣隙磁場的解析公式（集中電流法、分佈電流法） ，同時介紹了兩種永磁電機氣隙磁場計算方法（磁荷法，直接求解拉氏方程法） ，分析各種方法的優缺點，討論電機參數對氣隙磁密的影響； （ 2 ）介紹了單層同心繞組的布置方式，根據安培定律推導出空芯動圈式直線永磁同步電動機的靜推力計算公式，分析靜態力?位移特性； （ 3 ）建立空芯動圈式直線永磁同步電動機動態模擬模型，模擬不同驅動方式下電動機起動、穩態運行時電磁力、速度、位移的變化情況。By successful solution of non - linear magnetic fields and revision of the program, we can reach following conclusions : in the computation of nonlinear magnetic fields, if iteration method is used, under - relaxation is necessary when amending the permeability distribution in soft magnetic materials ; and when < wp = 5 > calculating the equivalent current density in permanent magnets, under - relaxation is not a necessity ; when searching for permeability values by interpolation method on the demagnetization curve of soft magnetic materials, if a fixed saturation point is set, around this point an abrupt change of permeability values will be obtained ; this sudden change may cause a little problem in the smoothness of magnetic field distribution ; because the magnetic circuits of microwave tubes are too complicated, in the author ' s view, to describe the working state of a magnet system, the working points of magnets can not do it properly but average energy production of magnets will serve ; as to indicate the quality of a magnet system design for microwave tubes, the efficiency of magnetic energy utilization will be a very good criterion
由此得出結論，在非線性磁場計算中：採用迭代法的情況下，在各迭代循環之間進行磁導率修正時，一個欠鬆弛迭代過程是必需的；對永磁體中的等效電流修正時可以不作欠鬆弛迭代；在純鐵的磁化曲線上指定某一個固定的磁感應強度為磁飽和值，會使得插值求出的磁導率在該磁飽和值附近有一突變，這一突變對計算結果中磁場分佈變化的光滑性稍有影響。在微波管磁系統設計中，由於微波管磁路比較復雜，作者認為磁體的工作點並不能很好地反映磁體的工作狀態，而採用平均磁能積為衡量磁體工作狀態的標準更加符合微波管磁系統的實際情況；要表示磁系統設計好壞的程度，則用磁能利用的效率為標準更好。And the subroutine is developed to add the periodic condition in the commercial 3d fem software. 3d electromagnetic field analysis is done to analyze the magnetic flux distribution in the tfpm. base on the field analysis, the mathematical model is given
採用簡化的三維電磁場計算方法對橫向磁通永磁電機內部磁通分佈進行了研究，計算了各部分的磁通密度分佈和漏磁通的走向，得到了電機的空載漏磁系數及空載反電動勢以及主要的漏磁通分量。As the 3d electromagnetic field calculation region of the tfpm is not suitable for the periodic condition, the calculation must be done for the whole region. it takes too much time. firstly, a method is adopted to simplify the 3d model with periodic condition
本文的工作主要包括以下幾部分內容:首先對本文研究的橫向磁通電機的三維電磁場分析模型進行了簡化，提出了對不符合周期條件的求解區域在工程設計允許的范圍內進行簡化處理的方法，同時對商業軟體進行了二次開發，編制了周期條件處理程序，減少了三維電磁場計算時間。The magnetic field far away from a plane current coil of any shape
任意形狀平面載流線圈在遠點處的磁場計算In part three, the physical and chemical properties of core - shell nanoparticles have been characterized by using transmission electronic microscopy, atomic force microscopy, zetasizer and alternating grade magnetometer
第三，採用透射電子顯微鏡、原子力顯微鏡、 zeta電位分析儀、交流梯度磁場計等儀器對該類納米顆粒的物理化學性質進行了表徵。Meanwhile the method of calculating the maximum and minimum inductance is programmed in visual c + + 6. 0 language. and an software which can check the characteristics of model srm only by the structure and magnetic field results is provided. the software has an interactive face that make the calculation direct
採用visualc + + 6 . 0語言編制了計算最大和最小電感的磁化曲線的計算程序，並開發了一個利用srm幾何尺寸和磁場計算結果核算電機性能參數的軟體，軟體採用互動式用戶界面，使計算直觀化。Finite element preprocessor, eddy current electromagnetic field calculation, the postprocessor and the visualization processor were integrated together in the software system, and good graphic user interface was also offered
該系統將有限元前處理、渦流電磁場計算、滲碳層深度逆問題求解及計算結果的可視化處理結合起來，提供了良好的用戶界面。At the beginning of 1980 ' s, bossavit and verite put it to practical application to three - dimensional eddy - current problems. in 1987, barton and cendes applied the tetrahedral element to three - dimensional magnetic calculation. since 1990 ' s, j. m. jin and j. l. volakis have studied a series of electromagnetic scattering and radiation problems using hybrid techniques based on edge - based fem
80年代初期， bossavit和verite將四面體棱邊元應用於三維渦流問題， 1987年， barton和cendes將四面體棱邊元首次應用於三維磁場計算揭開了基於棱邊的有限元方法在電磁問題中應用的序幕。Magnetic field numerical calculation of rectangular poled magnetic fluid sealing device
矩形齒磁流體密封裝置的磁場計算Analysis and optimization of boundary element method to irregular electromagnetic field
應用邊界元法對電磁場計算的分析及優化In this paper, firstly we analyse the distribution of the magnetic field in the permanent magnet canned motor pump which rate power is 15kw, and calculate the reactive electromotive force, armature reactance parameters of this motor pump with no loads and loads
本論文運用有限元方法分析了一臺15kw稀土永磁同步屏蔽電泵內部磁場的分佈情況，得到了在空載、負載等不同情況下，電泵的氣隙磁密分佈磁場，計算了反電動勢和電樞反應電抗等參數。It is very important to the electromagnetic simulations. this paper base on the theory and method of electromagnetic calculation and fdtd, associate with the particle simulation technology, develop an algorithm to resolve the problem of the eigenmode analysis of the cold - cavity in practice
本文從分析電磁場計算的基本原理和方法出發，立足於時域有限差分法，結合計算機粒子模擬技術和數值計算原理，開發出一種能夠分析計算高功率微波器件冷腔諧振頻率以及本徵模式的演算法。Second, in order to solve the practical problems, such as the problem that the computation for dynamic electromagnetic field costs a great deal of time and so does the drawing of electromagnetic field, the author establishes the reasonable program structure combined with advanced computer technology such as multi - thread in order to shorten computation time
其次，針對計算過程中的具體問題，同時由於處理動態電磁場計算並加以顯示效果會消耗大量的時間，本文建立了合理的數據和程序結構，並結合多線程等較先進的處理技術來改進程序運行效果，建立任務調度模型。So an reasonable inductance modify coefficient is found. according to the magnetic field distribution, some ameliorations are made, then a reasonable and more accurate analytic formula concerned the effect of end zone is presented
根據磁場計算結果，對非線性磁參數法中的一些公式提出了合理的改進，從而找到一種考慮端部效應、較準確計算最小電感的解析演算法。But in the course of magnetic field computation the permeability distribution in soft magnetic materials has to be supposed as known and fixed
該程序在磁場計算中只能假設軟磁材料中的磁導率都是已知的固定值。When one tries to calculate the permeability distribution the iteration will lose its convergence. the author finds out the reasons for the divergence by means of theoretical analysis combined with numerical experiments
作者通過理論分析與數值實驗相結合的辦法找出它計算軟磁材料中磁導率分佈時迭代發散的原因，並作出相應的改進，解決了非線性磁場計算的問題。分享友人