磁链

This dissertation analyses the mathematical model of the induction motor and its dynamic behaviour and points out that the key of realizing DSC is to choose stator voltage vectors reasonably according to the request of the flux and torque.

通过对交流异步电动机数学模型及动态形为的深入分析，指出实现直接转矩控制的关键是要根据磁链和转矩的要求，合理地选择定子电压矢量。

Based on a 5th-order model and the electromagnetic characteristics of an induction motor, we prove that the coefficient matrix is nonsingular, confirming the existence of the inverse decoupling control of stator flux and torque in any conditions.

本文从异步电动机的5阶模型及其固有的电磁特性出发，证明了其系数矩阵的非奇异性，进而结合逆系统理论证明定子磁链与电磁转矩的逆解耦在任何状态下都是存在的。

The realize method of ITC strategy in FSTP induction generation system is studied. In order to improve stable performance of FSTP induction generation system, SVM-ITC (ITC based on space vector modulation) is investigated. Creation method of reference voltage vector which includes change trend and magnitude information of flux link and torque is presented. Because there is no zero voltage vector in four-switch system, a method which employs opposite vector in equal time to replace zero voltage vector is proposed. Two vector modulation schemes are presented.

为提高容错型四开关三相异步发电系统的稳态性能，进行了基于空间矢量调制的瞬时转矩控制研究，提出了包含磁链与转矩变化趋势与大小信息的电压参考矢量生成方法；针对四开关系统无零电压矢量的情况，提出用等时间相反矢量来代替零电压矢量的作用，并给出了两种矢量调制方案。

Many factors are related to this fluctuate, one of them is the permanent magnet flux fluctuate.

造成转矩波动的因素有很多，其中永磁体磁链波动是一个重要原因。

By density-matrix renormalization group method, the 1/5-doping effect on the spin-1/2 Heisenberg antiferromagnetic chain is investigated.

利用密度矩阵重整化群方法研究1/5掺杂对自旋1/2海森堡反铁磁链的影响。

It includes compiling S-function for estimating the flux sector of squirrel-cage AC machine and selecting the switching vector.

该方法包括编写S函数来实现异步电机磁链扇区的判断和逆变器开关矢量的选择，以及利用Simpowersystems基本模块库来实现功率部分的仿真。

Direct torque control has excellent dynamic performance, but it has large ripple on stator flux and electromagnetic torque.

直接转矩控制系统具有良好的动态响应，但转矩及磁链的脉动较大。

The function of voltage vectors on the stator flux and torque is investigated.

并且具体分析了电压矢量对转矩和磁链的作用。

A sensorless control strategy for permanent magnet synchronous motors is presented based on the measurement and observation of stator current,voltage and flux vector.

根据测量和观测的定子电流、电压和磁链，提出了一种永磁同步电动机无传感器控制方案。

The internal model control method is introduced based on the dynamic model of asynchronous motor in d-q reference frame. And the design of stator current controller is proposed in detail based on rotor flux oriented vector control.

在同步速d-q坐标系下异步感应电机动态模型和解耦控制原理的基础上引入了内模控制方法，详细设计了基于转子磁链定向和内模控制的定子电流调节器。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。