First using the Maxwell system and the method of approximation in item-by-item we establish the analytic solution for vector electric potential.
首先,利用Maxwell方程组和逐次逼近法推导出矢量电位在非正交坐标系下的解析解;然后,通过有限差分法计算接收线圈处的感应电动势,得到视电导率的值;最后,计算了无井无侵地层模型在不同厚度和倾斜角度影响下的响应,计算结果与理论解及前人结果具有很好的一致性。
On the basis of the Maxwell's electro-magnetic wave equations,and using the rotation frame and Pauh matrices,the general formula of the wave equation and electric vector of linearly polarized light being incident along the helix axis and propagated in cholesteric liquid crystals is derivedin this paper.
本文以麦克斯韦电磁波方程为基础,通过引入局域坐标系和泡利矩阵等数学处理,得出了沿螺旋轴方向入射的线偏振光在胆甾相液晶中传播的波动方程及电矢量的一般公式,并由此讨论了波长与液晶螺距相差很大的线偏振入射光在胆甾相液晶中传播过程中偏振状态和偏振方向的变化规律。
To meet demand of high torque at low-speed and widerange speed of electric drive armored vehicle,a method on PMSM current vector control was clarified in detail,and the best run-track of current vector was discussed in this paper.
在详细阐述永磁同步电动机的电流矢量控制策略的基础上,从最大电机输出能力角度讨论了最佳电流矢量运行轨迹,提出了一种适用于车辆全范围调速的弱磁扩速综合控制算法。
The initial position can be measured accurately through controlling a given-position current vector of motor stator.
提出了一种电机初始位置的确定方法,通过输出给定位置的定子电流矢量的方法,可以精确检测出电机初始位置。
intermediate charged vector boson
中间荷电矢量玻色子
vector scan electron beam lithography
矢量扫描电子束光刻
vector scan electron beam system
矢量扫描电子束装置
Vector Control System of Asynchronous Motor on Electric Tourist Car;
异步电机矢量控制在电动车上的应用
Introduce the mathematics model of asynchronous motor and the principle of Field oriented control (FOC) and get its vector control equation.
异步电动机的数学模型、基本方程和矢量异步电机的矢量控制原理。
Derivation process of relationship between magnetic motive force space vector and current space vector in induction motors
感应电机中磁动势空间矢量与电流空间矢量关系式的推导
A Symmetrical Three-Section PWM for Three-Level Rectifier With Medium Vectors Being Eliminated
三电平整流器弃用中矢量的对称三区电压矢量调制策略
SVPWM Strategy for Three-Level Inverter Based on SVPWM Strategyfor Two-Level Inverter
一种完全基于两电平空间矢量调制的三电平空间矢量调制算法
The direction of the electric field vector is indicated in each picture.
每张照片上都标出了电场矢量的方向。
Research on Speed Sensorless Vector Control of Induction Motor;
异步电机无速度传感器矢量控制研究
Vector Control System of PMSM Based on dsPIC;
基于dsPIC的永磁同步电机矢量控制系统
Research on Adaptive Vector Control System of Induction Motor;
异步电机自适应矢量控制系统的研究
Research on PWM Rectifier Based on the Space Voltage Vector;
基于空间电压矢量的PWM整流器的研究
Research on Vector Control Servo System for Permanent Magnet Synchronous Motor;
永磁同步电机矢量控制伺服系统研究
Research on the Vector Control of 3-Phase AC Induction Motor Using DSP;
小功率交流伺服电机矢量控制的研究
Speed Sensorless Vector Control Three-level Inverter;
无速度传感器矢量控制三电平变频器
Technology of SVPWM Space Vector Generation for Multi-level Converters;
多电平变换器SVPWM矢量发生技术研究
The Vector Control System of AC Motor Based on DSP;
基于DSP的异步电机矢量控制系统