控制矢量

Vector control is the foundation of high performance PMSM control system Every vector control is analyzed and compared and several system characteristic are studied with special screw propeller load in this thesis, and then it is put forward that optimal torque control is the best control method of PMSM propulsion system.

本文对现有的几种矢量控制进行了深入的分析和比较，并结合推进系统特殊的螺旋桨负载研究了系统的各种特性，提出把转矩最优控制方案应用到舰船永磁同步电动机推进系统中。

In order to solve the problem of serious fluctuation of starting current in traditional control scheme, the author puts forward a new kind of starting method which can limit voltage value to achieve the goal of reducing fluctuation of the current by using zero voltage vector during the stage of starting.

文章分析了异步电动机直接转矩控制系统的工作原理及起动过程，针对传统控制方案存在起动电流波动严重的问题，提出一种通过在起动过程增加零电压矢量的方法限制电压值，达到减小电流波动的目的，对此进行了仿真研究，仿真结果表明该方法是有效的。

In this paper, the MATLAB/SIMULINK module has been set up on thebase of PMSM vec...

文章首先在分析PMSM矢量控制系统的基础上搭建了系统的MATLAB/SIMULINK仿真模块，并根据仿真给出控制系统软件流程。

This paper lays its emphasis on the latter by presenting a state optimal space vector control strategy on the basis of using a modified synchronous detection method to generate the reference current.

本文在采用改进的同步检测法产生指令电流的基础上，提出了一种基于状态优化的空间矢量控制方案，主要研究滤波器中变流器的控制策略问题。

The simulation and experiment results show that the rotor flux field-oriented vector control method was practically verified and the control system has better stable and dynamic performance.

实验结果表明转子磁场定向矢量控制策略是可行的，控制系统具有良好的动态性能和稳态精度。

Based on the analysis of control strategy of the system, this paper used respectively voltage oriented and stator flux oriented vector control in grid side and rotor side of the converter.

在分析了该系统控制方法的基础上，建立了交直交变频器网侧电压定向以及转子侧定子磁场定向的矢量控制系统模型。

The simulation results demonstrate that the stator flux oriented vector control strategy is feasible and practical. As a result a method is provided to realize independent controls of active and reactive power for ACEM concretely.

仿真结果验证了本文所提出的定子磁场定向矢量控制策略的正确性和实用性，从而为具体实现对交流励磁电机有功和无功功率的独立控制提供了一种方法。

Direct torque control ; stator flux oriented vector control ; stator flux estimation

直接转矩控制；定子磁链定向矢量控制；定子磁链估计

It is well known that rotor parameters of induction motor are subjected to variability and hard to be measured, which will deteriorate performance of control systems based on the mathematical model depending upon rotor parameters, such as rotor flux oriented vector control system, indirect self-regulation.

由于工作原理和材料结构上的原因，异步电机的转子侧参数易变难测，因此所有建立在异步电机动态数学模型基础之上并且利用转子侧参数进行控制的调速系统都或多或少地受到转子参数变化的影响，例如广泛采用的按转子磁链定向的矢量控制系统。

This paper analyses the mathematical model for BDFM (brushless doubly-fed machine) based on synchronous coordinates in the point of rotor speed d-q model. A new type of power control system is designed by using flux linkage oriented vector transformation control technology.

从转子参考轴d-q模型出发，研究同步坐标下的无刷双馈电机的数学模型，根据BDFM的特性，采用磁链定向的矢量变换控制技术，设计了一种新型的功率控制系统。

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。