正磁矩 的英文怎麼說

中文拼音 [zhēngcíjǔ]
正磁矩 英文
positive magnetic moment
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 磁 : 名詞1. [物理學] （磁性; 能吸引鐵、鎳等的性質） magnetism 2. （瓷） porcelain; china
  • 矩 : 名詞1. （畫直角或正方形、矩形用的曲尺） carpenter's square; square2. （法度; 規則） rules; regulations 3. [物理學] moment
  1. Permanent magnet synchronous motor ( pmsm ) drived by triphase sinusoidal current is research object in this paper. its mathematics models in several coordinate are set up, controlling principles of flux linkage and torque are discussed under dtc and the block diagram of pmsm with dtc is presented

    本文以三相正弦波驅動的永磁同步電機（ pmsm ）為研究對象，建立了其在不同坐標系下的數學模型，並深入探討直接轉矩控制中永磁同步電機的磁鏈和轉矩的控制思想，給出控制方案。
  2. To improve the capability of the bearing - less slice permanent motor, to reduce the ullage of the motor and the badly additive torque, i design optimization the structure of the rotor pm, and two projects are proposed. one is four pieces rotor pm which is the same magnetized and the other is eight pieces rotor pm which is different magnetized direction

    為了進一步改善片狀無軸承永磁電機的動態性能，減小電機的損耗及有害的附加轉矩，優化設計了轉子永磁貼片的結構，提出了四片同向充磁和八片正反向充磁兩種方案。
  3. This paper investigated the geological and geophysical meanings of fractals of aeromagnetic anomalies based on forward modeling on erect magnetized rectangular column model

    摘要通過對垂直磁化直立矩形柱體模型的理論分析和推導，建立了模型並進行了正演模擬計算，分析了磁異常分形的地質地球物理意義。
  4. For the bldcm which has a pseudo - sinusoidal back - emf waveform, this dissertation presents a svpwm control method using six discrete position signals for minimizing the torque ripple. the main aspects for the implementation of this method are analyzed, including the initial orientation of the voltage vector, reasonable choice of the impedance angle and the advance commutation angle, and estimation of the successive rotor positions

    針對反電動勢類似正弦的準正弦波反電動勢無刷直流電動機，本文提出一種基於六個離散位置信號的自同步svpwm （電壓空間矢量法）控制方法，用以削弱電磁轉矩脈動，分析了實現這種方法的主要控制環節，包括起動時電壓空間矢量的初始定位，阻抗角與電流超前角的合理選擇以及連續轉子位置的估計等。
  5. Furthermore, this dissertation also gives a comprehensive analysis and comparison to the torque ripple factor, torque - current ratio and other aspects for pseudo - sinusoidal emf bldcm drived by 120 conduction mode, 180 conduction mode and self - synchronous svpwm mode respectively. the simulation and the experimental results indicate that self - synchronous svpwm method is more effective for minimizing the torque ripple without any expense of the torque - current ratio when the crest width of the back - emf waveform is less than 107 electrical angles

    對準正弦波反電動勢無刷直流電動機在120導通方式、 180導通方式和自同步svpwm三種控制方式下的轉矩脈動系數、轉矩電流比等方面進行了全面的分析與比較，模擬研究和實驗結果表明，當反電動勢的平頂寬度小於107電角時，採用自同步svpwm控制方法可以在不損失轉矩電流比的基礎上，更有效地抑制電磁轉矩脈動。
  6. For the bldcm which has a general crest width of the back - emf waveform, two kinds of torque ripple conditions when drived by sine - wave current as well as by square - wave current are deduced based on the mathematical models. in addition, a comparison is carried out between these two conditions, which indicates that sinusoidal current driving is more favorable to minimizing the torque ripple when the crest width of the back - emf waveform is less than a certain value

    闡述了抑制齒槽轉矩措施對反電動勢波形的影響，利用無刷直流電機的數學模型推導並比較了任意平頂寬度梯形波反電動勢在正弦波和矩形波兩種電流驅動下的電磁轉矩脈動情況，得出在梯形波平頂寬度減小到一定數值后採用正弦電流驅動更有利於減小電磁轉矩脈動。
  7. After studying the relation of distributive function and density matrix, the electron energy is calculated in magnetic field according to the distributive function in the thermodynamic statistical physics and the density matrix average value principle in the quantum mechanics, respectively

    摘要研究正則系綜中的配分函數與密度矩陣的關系，分別採用熱力學統計物理中的配分函數和量子力學中的密度矩陣與平均值原理，計算電子在磁場中的能量。
  8. This dissertation mainly investigates some robust control strategies of the electromechanical actuator which is supposed to be activated by the sinusoidal permanent magnet synchronous motor ( pmsm ) and limited angle torque motor ( latm )

    本文主要研究了基於正弦波永磁同步電機（ pmsm ）及有限轉角力矩電機（ latm ）驅動的電動舵機的魯棒控制策略。
  9. In this thesis, we use the random - matrix - theory to revise the following calculating methods : ( 1 ) the heat capacity and the spin susceptibility of the normal metallic small particles ; ( 2 ) the heat capacity of the conventional metallic small particles at the low temperature using the mean field approximation method ; ( 3 ) the heat capacity of the conventional metallic small particles at the vicinity of the critical temperature using the static path approximation method

    本文採用隨機矩陣理論，計算了： （ 1 ）正常態金屬小粒子的電子熱容和順磁磁化率。 （ 2 ）在平均場近似下，計算了超導金屬小粒子低溫區的電子熱容。 （ 3 ）在靜態路徑近似下，計算了超導金屬小粒子轉變溫區的電子熱容。
  10. We present a calculation program in this paper, based on the physical optical theory ( po ) theary to predict bse and bses for a conical type of radome. the po theory is used to determine the ficticius currents electrical and magnetic on the inner face of the radome, which is illuminated directly by the radar antenna, and then use the transmission matrix mothod to determine the outer surface ficticion currents, the radiated from the antenna through radome is considered as the radiation field of these ficticion current

    本文提出了一種基於物理光學理論預測正圓錐天線罩瞄準誤差及瞄準誤差斜率的計算程序。首先，雷達天線照射到天線罩內壁，應用物理光學法求出內壁等效的電流和磁流，其次，根據傳輸矩陣理論求出外壁等效電流和磁流，天線通過天線罩的遠區場即可認為是外壁等效電、磁流產生的場。
  11. The innovation in this paper is list below ( 1 ) use rectangle - shape pipeline so that the inducing electromotive force could be enhanced ; ( 2 ) use alternating current whose frequency is adjustable to induce the magnetic ; ( 3 ) make the flowmeter intelligent by use the microprocessor ; ( 4 ) finish designing the ls flowmeter with utra - low power consumption

    本文的創新之處在於採用矩形測量導管大大增加微流量條件下的感應電動勢；採用輸出頻率可調的正弦波電流作為勵磁電流達到消除50hz頻干擾和減少正交干擾的目的；利用單片機等高端現代電子產品實現了電磁流量計的高度智能化及設計出真正的超低功耗的、可用干電池長期供電的ls旋轉流量計。
  12. Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail

    針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向，本論文重點做了以下幾個方面的工作，目的在於提高dtc系統的綜合性能： （ 1 ）提出一種新型的速度磁鏈觀測器，新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度，並且根據popov超穩定性理論推導出轉速的新型自適應收斂律； （ 2 ）改善系統的低速運行性能，主要從提高低速時對定子磁鏈的估計精度入手，提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp學習演算法來實時在線地修正定子電阻參數； （ 3 ）採用數字信號處理器dsp實現系統全數字化硬體控制，結合ti公司生產的tms320lf2407晶元，設計了直接轉矩控制系統的實驗裝置； （ 4 ）提出了基於sercos總線網路化分散式的直接轉矩控制系統， sercos （ serialrealtimecommunicationsystem ）是目前最適合同步和協調控制的串列實時通信協議； （ 5 ）基本勾勒出整個控制系統的硬體和軟體設計基本框架，詳細描述一些實驗中的具體的細節問題。
  13. In order to decrease the cost, simplify the structure of the pmsm servo system and at the same has no effect on the system performance, this paper uses hall element as the position sensor, which has very low solution but very low cost, and in order to realize sinusoidal current drive of pmsm, this paper presents a new rotor position estimator based on flux estimation

    為了降低成本，簡化系統，本文採用低解析度的霍爾元件作為pmsm伺服系統的位置傳感器，採用基於磁鏈觀測法的低解析度位置傳感器控制技術，來估計電機轉子的實時位置和轉速，實現電流的正弦換向，減小轉矩脈動。
  14. By using the conclusion from teaching material and taking rectangle current coil to be four conducting wire, the formular of magnetic fieldis derived and the special case of square current coil is also discussed

    摘要利用教材中一個常見例題的結論，將矩形載流線圈視為四段載流導線，採取分段計算然後疊：加的方法，導出了矩形載流線圈空間磁場分佈的普遍表達式，並討論正方形線圈的特殊情況。
  15. In addition, the mom - po hybrid method is proposed to dissect radiation from radome - enclosed antennas and the correction impedance matrix upon which the solution to equivalent currents of radome ' s surface depend is built. a comparative analysis of those methods is finally presented to examine respectively their accuracy as well as computational efficiency

    最後，對矩量法物理光學法的混合演算法分析問題的過程進行討論，給出混合演算法分析帶罩天線輻射問題的具體解決方案，建立混合演算法求解天線罩表面等效電磁流的校正矩陣。
  16. For the bldcm which has a neither sinusoidal nor trapezoidal back - emf, that is, for a general shape back - emf bldcm, this dissertation proposes a novel id = 0 vector control method. by this method, the iq for a constant torque to produce is calculated through coordinate transformation, and the reference iq is tracked by vector control in the dq0 frame

    對于實際反電動勢波形既非正弦又非梯形波的無刷直流電動機，提出一種新型的任意波形反電動勢無刷直流電動機的i _ d = 0矢量控制方法，通過坐標變換浙江大學博士學位佑文摘要求解產生恆定電磁轉矩所需的q軸電流，並在dqo坐標系下通過矢量控制對q軸參考電流進行跟蹤。
  17. The current estimated normalized magnetic field direction, corrected for the fields generated by the torque coils

    目前經由修正轉矩線圈產生的磁場而估計到的正規化磁場方向。
  18. Adaptive perpendicular flux observer with compensation feedback for direct torque control

    用於直接轉矩控制的自適應正交反饋補償磁鏈觀測器
  19. A permanent magnet synchronous motor is selected so that the system could work excellently. multiform measures are taken to weakening the torque ripple, such as adopting stator - flume, choosing right ratio of magnet - width and slot - width, and programming properly. a permanent magnet synchronous motor cad software is worked out for predigesting the design of the motor

    力矩脈動是衡量交流伺服系統性能優劣的重要指標，為達到理想的控制效果，系統採用正弦波驅動的稀土永磁同步電動機作為執行元件，電機本體的設計綜合採用定子斜槽、將轉子永磁體連續移位、合理選擇永磁體寬度和齒槽寬度比等方法，基本消除了齒槽轉矩；對于紋波轉矩，系統採用軟體的方式加以削弱和補償。
  20. This dissertation presents several novel control techniques for the torque ripple minimization of pm bldcm. according to the different back - emf waveforms of bldcm, this dissertation gives a detailed analysis to the torque ripple due to trapezoidal emf, pseudo - sinusoidal emf, and general shape emf respectively, and from each one proposes a kind of control technique for torque ripple minimization

    根據永磁無刷直流電動機反電勢波形的不同，對方波型無刷直流電動機的換相轉矩脈動，準正弦波（ pseudo - sinusoidalemf ）反電動勢無刷直流電動機以及任意波形反電動勢無刷直流電動機的電磁轉矩脈動，進行了詳細的分析，分別提出三種不同的控制策略，進行轉矩脈動抑制控制。
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