磁夾角 的英文怎麼說
中文拼音 [cíjiājiǎo]
磁夾角
英文
magnetic obliquity-
In fact, the difference between the directions of celestial and magnetic north depends on the position of the observer
天球的北和指南針所指示的磁北並不相同。而且其夾角會因地點不同而相異。In consideration of the calculation measures and the purpose of study, we selected the simple molecule model 5 in the above models and studied the relation between magnetism and structure. the molecular antiferromagnetism increases with the increasing of the bridging angle o - c - o ( o ). when 0 > 118. 623 degrees, the molecular antiferromagnetism increases with the decreasing of the spin density on the cu in its triplet state
考慮到計算量及研究目的，在上面的模型中選取了較簡單的分子模型5 ，來研究其磁構效關系，分子的反鐵磁性隨橋聯角o - c - o夾角的增大而增強，在大於118 . 623度時，分子的反鐵磁性隨三重態銅上自旋密度的減小而增強，但當小於118 . 623度，分子反鐵磁性隨三重態銅上自旋密度的減小反而減小，在文中，我們解釋了這種現象。Four kinds of c / c composites with different preparation techniques were graphitized at 2400 - 2880. the relations between magneto - resistance and orientation ( the angle between surface of samples and magnetic field ), measure temperature, the intensity of magnetic field ( b ) were studied for each sample. the micro - structure and x - ray diffraction pattem were investigated too
本論文在對制備工藝不同的四種碳/碳復合材料樣品進行2400 2880的石墨化處理后，應用ppms （ physicalpropertymeasurementsystem ）研究了測試位向（試樣某特定面和磁場方向夾角） 、測量溫度以及外加磁強對材料磁電阻特性的影響，同時研究了各試樣的微觀結構和x射線衍射譜圖。In multi - channel digital magnetic record / playback heads, the angle between the parallel lines measuring gap scatter and the nominal direction of tape motion over the head assembly
在多道數字記錄讀出磁頭中，測量間隙變化的平行線與磁帶在磁頭組合件上運動的標定方向之間的夾角。Based on the effective mass theory and critical state model, an anisotropic theory of critical current and ac losses for single hts tape and tape stacks were established. analytical formulae were presented to calculate critical currents and ac losses with an arbitrary angle between the wide side of hts tape and the direction of ac or dc applied fields. from the anisotropic theory of ac losses of hts sample, a numerical model to calculate ac losses of hts coil was developed
基於臨界態模型與高溫超導體的有效質量理論，建立了高溫超導帶材及並聯堆疊帶材的交流損耗與臨界電流的各向異性理論模型；給出了高溫超導帶材的交流損耗及臨界電流隨（交、直流）背景磁場與超導帶面夾角變化規律的理論公式；依據所建立的高溫超導短樣帶材的各向異性理論公式，給出了高溫超導線圈交流損耗的數值計算模型；並利用該模型，計算了高溫超導雙餅線圈的交流損耗；並與實驗測量結果進行了比較分析。Therefore. the unit rotor power factor can be implemented. in the second scheme, the stator power factor can be improved by adjusting the angle between rotor voltage and rotor magnetic linkage
在第二種控制方案中，通過控制轉子電壓與轉子磁鏈保持一定的角度，通過改變轉子電壓與轉子磁鏈的夾角，即可改變定子側功率因數。First, a pmsm direct torque control method based on svpwm is studied. and a good control effect of the flux and the torque is gained according to selecting the six voltage space vectors. and in simulation, this control method consider the circs that the angle between the stator and the rotor is bigger than 90 degrees, which restrains steps losing of synchronous motor effectively
首先研究了基於svpwm （空間矢量pwm ）的永磁同步電動機直接轉矩控制方法，通過對六步電壓空間矢量的綜合控制，可以得到比較滿意的磁鏈和轉矩控制效果，而且模擬中充分考慮了定轉子夾角大於90度的情況，有效地限制了同步機的失步問題。Traditional direct torque control uses two value torque regulator which makes zero voltage vector work long and make flux shape bad seriously and makes response time long when the speed of induction motor is very low or drops down quickly. in order to solve this problem the thesis puts forward a new way to use three - value torque regulator, when the motor speed is very low or drops down quickly, the contrary voltage vector is used instead of zero voltage vector and the between the stator flux and rotor flux is reduced quickly so that torque is reduced quickly and response time becomes shorter
為此，本論文提出三點式轉矩調節，這樣當電機低速運轉或給定轉速突降時，不是加零電壓矢量，而是加反方向的電壓矢量，使定子磁鏈與轉子磁鏈之間的夾角迅速減小，從而使電磁轉矩也迅速減小，大大減小了調速時間，同時磁鏈值仍然保持基本恆定，輸出比較穩定的電磁轉矩，這在電機制動過程中非常有用。分享友人