矢量合成 meaning in English
composition of vectors
Examples
- Abstract : first , the key magnet statuses and their pertinent mmf . position of exterior rotor brushless dc motor are described in this paper . second , the air - gap magnetic field and the armature reaction of the three - phase six - step exterior rotor brushless dc motor used in electrical bicycle are analyzed by means of mmf . vector , mmf . integration and magnetic field fem respectively . some valuable conclu - sions for designing this kind of motor are obtained
文摘:给出了外转子无刷直流电动机的典型磁状态及其对应的磁势矢量位置，并用磁势矢量合成法、磁势积分法及电磁场的有限元方法对电动自行车用三相六状态外转子无刷直流电动机的气隙磁场及电枢反应进行了详尽的分析，从而得到有益于该种电机设计的结论。 - Secondly , based on the defects of the uptodate balancing machine which were employed in the motorcycle manufacture plants , this dissertation has presented a new method on the means of checking unbalance mass of the motorcycle single - cylinder engine crank - connecting rod mechanism . it has adopted the hard - bearing balancing machine as the prototype , utilized tow group of resistance sensors placed in vertical direction with one another to pick up the information which stand for the inertial force of the motor engine crank set when it is running
其次，通过对当前国内外曲柄连杆机构动平衡试验的现状及其存在问题的分析研究，提出了一种新的测试方法：在工作原理上采用硬支承型测力式动平衡机，在测量方法上应用互成90的两点测量来矢量合成任意一点旋转惯性力大小及方向，这也是其不同于以往试验机的最大之处。 - In this thesis the author made a study of asynchronous motor model , designed a hybrid simulation system of dtc and analyzed the characteristics of the dtc system and the existing problems detailedly . due to the large torque ripple of induction motor in dtc system , especially in low speed , this thesis proposed a discrete time space vector modulation and designed a sliding - mode torque and flux controllers based on sliding - mode theory to overcome this drawback
由于直接转矩控制存在的不足之处主要在于转矩脉动，特别是在低速运行时这种情况更加突出，针对该问题，本文提出了一种离散时间空间矢量合成法来改善转矩脉动，并且引入滑模理论，设计了一种滑模转矩和磁链控制器来克服这一缺点。 - In order to decrease the harmonics in mc ' s input and output current , the svm method and sinusoidal hysteretic band method are introduced into the mc hysteretic control respectively . secondly , based on the predictive current control fundamental principle , the particular 27 vectors predictive current control strategy and current trend predictive control strategy are proposed . the simulation indicates that all of the current methods can improve the mc ' s output current quality and speed its dynastic response
提出了矩阵变换器的滞环电流控制策略，并针对滞环控制时输入电流和输出电流的谐波，分别提出了输入电流空间矢量合成滞环控制方法和正弦环宽滞环控制方法；引入了矩阵变换器的预测电流控制新思路，在此基础上，提出了矩阵变换器独特的27矢量预测电流控制方法和趋势型预测电流控制方法，仿真结果表明，各种电流控制方法提高了变换器的输出电流品质，加快了变换器的动态响应性能。