双笼感应电动机的SIMULINK建模和运行特性仿真

根据双笼三相感应电动机在qd/qd旋转坐标系下的数学模型,利用MATLAB软件中的动态仿真工具SIMULINK,构建了双笼三相感应电动机仿真模型;在此基础上,通过实例对双笼三相感应电动机负载突变和能耗制动下的运行特性进行了仿真研究,仿真结果证明了仿真模型的有效性和实用性.     

基于SIMULINK的双笼感应电动机的建模与仿真

论述了基于S IMUL INK的双笼转子三相感应电动机(DC IM)建模与仿真的方法。根据双笼感应电机在qd/qd旋转坐标系下的瞬态模型,结合必要的坐标变换,利用M ATLAB/S IMUL INK,通过编写M文件的S函数和构建坐标变换模块,建立了相应的仿真模型。并通过实例验证了仿真模型的有效性和实用性。     

基于d-q模型的感应电动机制动仿真及分析

建立三相感应电动机在d-q坐标系下的动态数学模型,并分析三相电压源型逆变器的空间矢量脉宽调制(SVPWM)技术。在MATLAB/SIMULINK环境下,构建SVPWM电压源型逆变器供电的三相感应电动机的仿真模型,分别进行三相感应电动机能耗制动、反接制动和回馈制动的动态仿真,并分析这三种制动方式的特点,为电力传动系统的设计提供理论依据。     

六相感应电动机电源反接制动瞬态仿真研究

对六相感应电动机电源反接制动的瞬态过程进行了仿真分析。为了得到瞬态特性,建立了六相感应电动机在静止dq0坐标系下的混合磁链瞬态数学模型。编写计算机仿真程序,通过实例对六相感应电动机的电源反接制动的瞬态过程进行仿真计算,对仿真结果进行分析,得出了一些有用的结论。     

三相感应电动机单相SemihexTM运行瞬态过程仿真

为了得到三相感应电动机Semihex^TM接法单相运行时的瞬态特性，根据三相感应电动机在A、B、C相坐标系下的动态数学模型及三相感应电动机采用Semihex^TM接法时的边界方程，编制计算机仿真程序，对三相感应电动机单相Semihex^TM运行的瞬态过程进行仿真研究，对仿真结果进行分析：用对称分量法分析三相感应电动机Semihex^TM接法时的不对称系统，确定电容的数值。试验证明了分析方法的正确性。     

Semihex^TM接法三绕组单相电容电动机能耗制动的仿真研究

对SemihexTM接法的三绕组单相电容电动机的能耗制动进行了初步探索,对三种接线方式进行仿真研究.建立SemihexTM接法三绕组单相电容电动机直流制动时在静止d-q坐标系下的瞬态数学模型,通过实例对电动机带通风机负载时在三种接线方式下的能耗制动的瞬态过程进行仿真计算,给出了瞬态仿真特性曲线.仿真结果表明:SemihexTM接法三绕组单相电容电动机带通风机负载时可以进行能耗制动实现快速停车;通过改变直流电源电压的数值可以调节制动停车时间.     

单个电容器起动三相感应电动机的建模和仿真研究

对Y接法三相感应电动机接单个电容时的起动过程进行仿真分析.为了得到瞬态特性,建立了Y接法的三相感应电动机接单个电容起动系统在α-β坐标系中的瞬态数学模型,采用MATLAB编写计算机仿真程序,通过实例进行仿真计算,对仿真结果进行分析.根据用对称分量法分析Y接法三相感应电动机接单个电容时的电路系统时导出的起动时获得最大电磁转矩的条件,计算起动电容的数值.     

单相Smith电动机瞬态分析

对三相感应电动机Smith接法单相运行时的瞬态过程进行仿真分析.为了得到瞬态特性,推导出电动机定子绕组端电压约束条件,建立起单相Smith电动机在αβ坐标系下的瞬态数学模型.编写计算机仿真程序,通过实例对三相感应电动机Smith接法单相运行时的瞬态过程进行仿真计算,计算结果与试验结果基本吻合,验证了该模型的正确性;用对称分量法分析三相感应电动机Smith接法时的电路系统,确定电容的数值.对仿真结果进行分析,单相Smith电动机在负载一定、转速一定的情况下通过选择恰当的电容可以实现完全平衡对称运行.单相Smith电动机在由三相电机额定相电压的单相电源供电时带负载能力较弱,起动转矩较小,适合于对起动要求不高的风机泵类负载,当要求起动转矩较大时,可采用双值电容来实现.     

三相感应电动机短路故障运行的仿真研究

本文建立了三相感应电动机的数学模型,用MATLAB语言编制了仿真程序;对三相感应电动机短路故障的瞬态过程进行仿真,并对仿真结果进行了分析。     

六相异步电动机能耗制动瞬态仿真研究

对六相异步电动机能耗制动的瞬态过程进行仿真分析。为了得到瞬态特性,建立了六相异步电动机在静止d-q-0坐标系下的混合磁链瞬态数学模型。编写计算机仿真程序,通过实例对六相异步电动机的能耗制动的瞬态过程进行仿真计算。仿真结果表明六相异步电动机可以在两套绕组中通入较小的直流电流获得较强的恒定磁场,从而产生较大的制动转矩。     

双笼感应电动机的SIMULINK建模与仿真分析

根据双笼感应电机在qd／qd旋转坐标系下的瞬态模型，结合必要的坐标变换，利用MATLAB／SIMULINK，通过编写M文件的S函数和构建坐标变换模块，建立了相应的仿真模型．通过实例验证了仿真模型的有效性和实用性．     

Effects of symmetrical voltage sags on squirrel-cage induction motors

This paper analyzes the symmetrical voltage sag consequences on the induction motor behavior when single- and double-cage models are considered, namely current and torque peaks, and speed loss. These effects depend on several variables like sag type, duration and depth. Voltage sag effects are studied by using single- and double-cage models for three motors of different rated power. The double-cage model always predicts torque and current peaks higher than those of the single-cage model. The single-cage model predicts that voltage sags can produce motor instability, whereas the double-cage model is always stable. Therefore, the double-cage model must be used for the simulation of the squirrel-cage induction motor, because the single-cage model can give erroneous results in some situations.     

Capacitor braking of double-cage induction motors

Capacitor braking relies on the self-excitation process and represents a well-established technique of braking of single-cage induction machines. However, there appear to be no papers on the capacitor braking of double-cage induction motors. Since the self-excitation process constitutes the basis of capacitor braking, a correct representation must include the effects of main flux saturation in the induction machine model used. The paper first summarises the mathematical model of a saturated double-cage induction machine and then presents experimental results together with results of a comprehensive simulation study. Both symmetrical three-phase and asymmetrical single-phase capacitor braking techniques are considered. The results are shown for two different double-cage induction machines. The experimental and simulation results are found to be in good agreement.     

基于Ansoft双笼双绕组电机起动性能仿真

利用Ansoft公司的Maxwell 2D在用集中参数等效定转子端部效应的前提下,建立了双笼双绕组电机的模型,对电机起动过程和堵转状态进行了仿真计算。仿真结果证明了电机电磁设计的正确性并为电机的优化设计和进一步研究奠定了基础。     

Harmonic modeling of induction motors

The paper proposes an induction motor model for the study of harmonic load flow in balanced and unbalanced conditions. The parameters of this model are obtained from motor manufacturer data and the positive- and negative-sequence equivalent circuits of the single- and double-cage models. An approximate harmonic model based on motor manufacturer data only is also proposed. In addition, the paper includes manufacturer data and the calculated parameters of 36 induction motors of different rated powers. This database is used to analyze the proposed models.     

双鼠笼感应电动机的瞬态模型

首先给出瞬态情况下双笼感应电动机的运动方程,接着导出方程中各个电感与稳态等效电路中有关参数的关系,最后阐明转子具有两套独立端环和具有公共端环两种没结构时,稳态等效电路,转子电阻矩阵和转子互漏抗的差别。全文为双笼感应电动机的瞬态分析打下了理论基础。     

基于铭牌数据和序列二次规划算法的感应电动机模型参数辨识

为克服基于铭牌数据辨识电动机模型参数时人工增加近似约束条件的不足,提出新的辨识电动机单笼和双笼模型参数的优化数学模型。该模型以计算效率偏差最小为目标,以电动机定子电流、输入无功、最大电磁转矩和起动参数等重要性能指标等于铭牌值为约束条件,并采用序列二次规划算法进行求解。算例验证了所提模型和算法的科学性。与其他方法的比较表明,采用所提模型与算法计算得到的模型参数能够更好地反映电动机的工作特性。     

Modeling and Experimental Study of 3-Phase Short-Circuits of a Double-Cage Induction Machine

Three-phase short-circuits of the induction machine yields to high levels of stress in an induction traction drive. To study these operations, the authors propose to model the machine by a multiple cage equivalent circuit. This enables us to take into account the deep bar effect with accuracy. The identification of the equivalent circuit and its validation are carried out experimentally for a 30-kW double-cage induction motor.     

On the Determination of Induction Motor Parameters From Manufacturer Data for Electromagnetic Transient Programs

In this paper, an inaccuracy of the method for induction motor parameter determination used in EMTP type simulation programs (ATP, EMTP96, EMTDC) is discussed. The paper presents a numerical method for the estimation of induction motor double-cage model parameters from standard manufacturer data, i.e., full load mechanical power (rated power), full load power factor, maximum torque, starting torque, starting current and full load efficiency. The nonlinear equations to obtain the motor parameters have been solved with a modified Newton method that always converges if the problem is well defined (that is, a solution exists). The method has been tested with 608 motors from different manufacturers. The manufacturer parameters that have a greater influence on convergence are the maximum torque and the starting current. The cases where the method does not converge have been studied and the range of variation of the maximum torque or starting current which determines where the data are well defined (that is, a solution exists) has been calculated.