控制矢量

The paper discusses the theory of speed controlling after interpolating and how do the factor that mostly include cutting speed,time constant of speed controlling and vector angle of conterminous CNC segment affects arriving precision.

文章论述了后加减速的原理及进给速度、加减速时间常数、上下程序段之间的矢量夹角对轮廓误差的影响，给出了数据采样插补应用后加减速时依据矢量夹角控制轮廓误差的一种方法，并对矢量夹角的计算给出了详细解析。

Firstly, this paper introduced the vector-convection discussed model of a squirrel-cage asynchronous motor. And the vector control system takes the model set up by Matlab/Simulink as its control object.

首先详细介绍了异步电动机矢量控制的原理及数学模型，并利用Matlab/Simulink软件构建了矢量控制系统的仿真模型。

According to the principle of vector control used in an asynchronous motor, a simulation model of the asynchronous motor in electric vehicle and vector control system in rotor flux orientation was established with the help of Matlab/Simulink software.

根据异步电机矢量控制原理，建立了电动汽车用异步电机的仿真模型和转子磁场定向下的矢量控制系统模型，并在Matlab/Simulink软件环境下对其进行建模。

By theory analysis and using zero voltage vector,a PMSM DTC control system model has been established in Matlab,and the simulation study shows that zero voltage vector can effectively diminish the torque ripple and improve the system performance.

在理论分析的基础上采用零矢量的控制方案，建立了基于Matlab/Simulink的PMSM直接转矩控制伺服系统模型。仿真结果验证了加入零电压矢量可以有效地抑制转矩脉动，提高系统性能。

The speed-sensorless vector control and the identification of motor parameters in this paper are the two novel research of vector control.Using asynchronous machine's mathematic model in three-phase static reference frame, this paper has derived it's mathematic model in two-phase static reference frameand in two-phase rotating reference frame, and got the coordinate transformance formulus based on the constant magnetic force and power force, by compared different field orientation methods, we can find that field orientation at rotor field can realize the decoupling of the stator current flux component

无速度传感器矢量控制和电机参数辨识是矢量控制的两个新的研究方向，本文利用异步电机在三相静止坐标系下的数学模型推导出两相静止坐标系、两相同步旋转坐标系下的数学模型，根据磁动势守恒和功率守恒的原则，得出各坐标变换公式；通过不同磁场定向方式的比较发现，异步电机按转子磁场定向时定子电流励磁分量和转矩分量可以比较方便地实现解耦。

In the third part, the simulation research on asynchronous motor DTC system base on six voltage space vectors and twelve voltage space vectors are realized in MATLAB/Simulink. Through comparisons of the two simulation results, the method of minifying torque ripple is obtained.

第三部分，运用MATLAB/SIMULINK进行了基于六矢量和十二矢量的两种异步电动机直接转矩控制系统的仿真研究，搭建了系统的仿真模型，并对仿真结果进行了对比，得出减小直接转矩控制转矩脉动的方法。

Then the DTC theory of PMSM and the voltage vector table are analyzed. A new DTC scheme for PMSM is proposed in this paper, which is based on the area voltage vector. And the paper offers the available modulation algorithm between torque and flux.

拓展了一种基于区域电压矢量表的新型控制策略用于永磁同步电机直接转矩控制，并给出了转矩、磁链作用分量协调可控的电压矢量选取调制算法，基于理论分析和MatLab6。

According to the principle of vector control system, a simulation model of SPWM inverter - fed induction machine and its control system with the reference frame fixed to the rotor is established in this paper.

该文根据感应电机矢量控制的基本原理，基于MATLAB／SIMULINK构造了电压型SPWM逆变器供电的感应电机按转子磁场定向的矢量控制系统的仿真模型。

In this paper, the flux oriented angle of stator flux oriented vector control is deduced by the voltage vector space angle of the direct torque control, and mathematical model is set up based on the direct and quadrature axis component of the stator current.

将直接转矩控制与定子磁链定向矢量控制相结合，利用DTC中电压矢量的空间位置角，推导出SFOVC中的磁链定向角，然后根据旋转坐标系中的d轴和q轴电流分量，建立定子磁链估计的数学模型。

The prototype was completed, and the simulation and experiment results show that the permanent magnet synchronous motor system of matrix converter based on the hybrid modulation has good control performance and high input power factor.

原理样机试验结果表明，采用空间矢量SPWM电流控制的矩阵变换器-永磁同步电机系统不仅达到了良好的矢量控制，而且也提高了输入侧的性能。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。