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。     

十五相感应电机定子绕组多相开路的稳态特性

基于通用电机基本原理和对称分量法,对十五相感应电机在定子绕组多相开路时的稳态电流和转矩特性进行了分析,由十五相感应电机的稳态等效电路,采用数值求解方法获得了多相定子绕组开路时电机各稳态相量.理论分析和实验表明,多相电机特性的恶化程度与定子绕组开路的相数以及它们的相对位置有关.     

考虑铁损的牵引电动机的建模仿真

在研究电机效率和调速系统性能时,铁损的影响已不可忽视。通过对实验数据进行拟合得到等效铁损阻抗与频率的关系式,基于Matlab/Simulink软件,建立了考虑铁损的三相异步牵引电机的仿真模型。通过仿真试验结果和实际电机参数的对比,验证了该模型的正确性与有效性。     

异步电动机双笼转子结构及导条电阻的选取

0引言随着我国国民经济飞速发展,工程机械领域和煤炭工业也在迅猛的发展,采煤机、联采机、掘进机、盾构机等机械设备大批量应用于煤炭、地铁、水利工程等领域。有些驱动电动机主要用于截割头和刀盘驱动,要求起动转矩倍数大、过载能力强(最大转矩倍数大),起动电流倍数不能太大。     

非对称三相绕组异步电动机暂态计算机仿真

本文采用一般多相综合矢量法推导出非对称三相绕组异步电动机的易于求解的暂态数学模型，并对电机暂态特性进行了数值仿真，由计算与实测值的良好吻合，证实了所用方法是行之有效的。     

双三相感应电动机直接转矩控制技术的研究

针对传统双三相感应电动机直接转矩控制系统的定子谐波电流较大这一问题,在基本SVPWM算法、基本DTC技术的基础上,设计出一种基于十二中间电压矢量的双三相感应电动机DTC系统.在Simulink环境下建立了该系统的各部分仿真模块和总体仿真模型,结果表明,设计的系统能够有效减小定子谐波电流和转矩脉动,从而验证了所提出控制策...     

基于DSP的三相感应电机磁场定向控制策略

介绍了DSP处理器的基本结构和性能,给出了感应电机矢量控制的硬件设计方案和软件控制算法。该系统利用了TMS320F2806芯片的外围部件和运算能力,组成的电路结构简单,抗干扰能力强。实验结果表明,提出的无速度传感器矢量控制方案设计合理,控制精度高,具有良好的动静态性能。     

三相感应电动机等效电路参数的一种计算方法

介绍了一种运用计算机对三相感应电动机等效电路参数进行高精度计算的方法。并用此法对6台样机的等效电路参数及其运行特性进行了研究,计算值与实验值一致,证明了此法的正确性和实用性。     

新型三相磁通切换型双凸极永磁电机电感特性分析

本文基于有限元法研究了一种新型三相12/10极切换磁通型双凸极永磁电机的电感特性.首先介绍了该电机的结构特点和运行原理;其次比较了静态电感和动态电感的定义;并在此基础上采用通用的定子三相坐标系和dq轴两相坐标系变换将三相绕组电感变为直轴和交轴电感;针对该种方法耗时多、运算量大的缺点,提出了一种基于两个特殊转子位置的简单快捷的方法,可以直接计算得到直轴和交轴电感,所得结果与传统方法计算结果比较验证了该方法的有效性,并得到了样机实测电感数据的验证.     

Induction Machine Modeling Based on Shifted Frequency Analysis

Electromagnetic transient program (EMTP) simulators are being widely used in power system dynamics studies. However, their capability in real-time simulation of power systems is compromised due to the small time step used and relatively slow simulation speed. The shifted frequency analysis (SFA) is then proposed to accelerate the EMTP simulations for power system dynamics. The objective of this paper is to extend the SFA method to model the induction machines in EMTP. By analyzing the relationship between rotor and stator physical variables, a phase-coordinate model with lower number of equations is first derived. Based on this, an SFA model is proposed as a general purpose model capable of simulating both fast transients and slow dynamics. Case study results have confirmed the SFA induction machine model is a valuable component for real-time EMTP simulations. It is observed that the SFA model is in excess of 70 times faster than the standard EMTP model when simulating dynamics with frequency spectra close to the fundamental power frequency.      

Computer Analysis of 3-Phase Induction Motor Operation on Rural Open-Delta Distribution Systems

Open-delta/open-delta and open-wye/open-delta transformer banks are often used as an economic means of supplying simultaneous single-phase and 3-phase loads in rural areas. If the 3-phase load is an induction motor, the inherent voltage unbalance causes increased losses and uneven heating that may lead to motor failure. often these motors are submersible or deep well pump motors located in remote unattended areas or air conditioning motors which may not have sufficient over-design to handle the voltage unbalance. The theory analyzing the open-delta distribution system has existed for many years, however, because of the tedious and almost infinite differences in distribution topology, the problem has been neglected. The purpose in this endeavor is to present a simple general approach to the solution of the problem by utilizing existing motor and network concepts and theories. Two previously published theories are used to predict motor heating and the motor derating that is necessary to prevent insulation failure due to the unbalanced voltages. A general motor model has been developed. Motor heating and derating are obtained from the model through a generalized digital computer program.     

单相异步发电机的设计与性能分析

解决了单相异步发电机的几个设计问题，提出了决定其电容值的简便方法及其空载特性、负载特性和调节特性的方法，并给出了理论计算与实验结果。     

Double Three-phase Induction Machine Modeling for Internal Faults Simulation

Multi-phase induction motors present excellent characteristics for faulty tolerant operation. Among them, six-phase induction motors, which are among the most used, exhibit two types of configuration: the double three-phase and the six-phase with single neutral. The double three-phase presents the advantage of reducing harmonics with its symmetric winding. This article presents a new modeling of the double three-phase induction machine for internal faults simulation. The developed model is composed by two sets of three-phase stator windings forming two stars. The model considers an arbitrary displacement (α) between stator stars, allowing the simulation of this type induction machines with different configurations, with 60° displacement used herein. The simulations of internal faults, such as stator windings or rotor faults, are both considered in the proposed model, allowing the machine study under abnormal conditions. The double three-phase induction machine model was fully implemented in real coordinates, making it possible to simulate stator and rotor faults without being necessary to change system equations coordinate. Several examples allow verifying the characteristics of the proposed model and its application for internal fault analysis. Experimental results are also presented to validate the obtained simulation results.     

12/3相双绕组异步发电机定子端部漏感的计算

为计算12/3相双绕组异步发电机多达上百的相间端部漏感，在两线圈间端部漏感的求取和绕组与线圈连接关系确定方面采用了新的分析方法，此方法具有简单通用等传统方法所不具备之优点。通过引入气隙电流和镜像电流，以Biot-Savart定律为基础，把线圈端部各大段分成若干小段，用数值方法计算两线圈间端部电感。仿照图论结合回路电流法分析电路网络的过程，列写了表示线圈支路电流与一相绕组回路电流间的关联矩阵，用规范统一的编程方法计算各相绕组间的端部漏感并给出了几个漏感参数值。最后还对文中方法和其它方法的计算结果进行了比较。     

最小－最大优胜原理在三相感应电机优化设计中的应用

罚函数应用于电机优化设计中总存在一些问题，本文提出了一种迅速有效的电机优化方法──最小－最大优胜原理求解电机双目标优化法。从而解决了罚函数法中不同电机规格须用不同罚因子的问题。为获得全局或接近全局极优值，采用在离散变量值大的变量周围，用适应性随机法产生各设计变量的增量，并引入模式搜索进一步寻优，使探测点大部分在好点附近，提高了寻优的目的性和寻优效率，所开发的软件，收到了预期效果。经对Ｙ系列电动机的验算，证实了理论分析的正确性。该软件已为几家电机制造厂采用，均收到明显效果。     

双三相同步电动机的数学模型及仿真

建立六相双Y移30°绕组同步电动机的状态空间数学模型,为了便于计算全阻尼绕组电流,定子采用d-q坐标变换,转子采用多回路模型,并对电动机带螺旋桨负载的起动过程进行了仿真和分析。仿真结果验证了模型的有效性,同时表明这种双三相同步电动机起动性能良好,转矩脉动较小,非常适合船舶电力推进系统的应用。     

12/3相双绕组异步发电机定子谐波漏感的计算

为计算12/3相双绕组异步发电机多达上百的相间谐波漏感，在两线圈间谐波电感的求取和绕组与线圈连接关系确定方面采用了新的分析方法。以单一线圈而不以一相绕组为基础，通过总电感减去基波电感的方法计算两线圈间的谐波电感，并在区分控制绕组和功率绕组情况下给出了异步发电机任意2个定子槽中线圈间谐波电感值。仿照图论结合回路电流法分析电路网络的过程，列写了表示线圈支路电流与一相绕组回路电流间的关联矩阵，用规范统一的编程方法计算各相绕组间的谐波漏感，并对其中几个电感值进行了定性分析。所用分析方法通用性强，对绕组连接复杂多相异步电机定子谐波漏感参数计算优势明显。     

船舶电力推进双三相永磁同步电机的数学模型和仿真

通过详细推导,建立了船舶电力推进双三相永磁同步电机在双三相和单三相两种供电模式下的数学模型,并通过双三相和单三相两种正交坐标变换方法分别将原坐标系中的数学模型转化为dq轴上形式简化的模型。然后根据dq轴上数学模型分别完成了两种模式下,供电电压含有不同谐波成分时的数字仿真,得出了仿真的结果和相应的结论。     

Analytical and Experimental Study of Gearbox Mechanical Effect on the Induction Machine Stator Current Signature

The aim of this paper is the analytical and experimental study of a gearbox by using the stator current signature analysis in the driving induction machines. The mechanical study using the vibration signal analysis has been well studied before. Recently, some works have been performed to observe the vibration components of the mechanical part in the stator current spectrum for an induction machine but without any theoretical development. This paper proposes a theoretical framework based on torque oscillations due to the characteristic torsional vibrations in a gearbox, and the source of mesh and rotating frequency components in the stator current is presented. To verify the theoretical development, a test bed based on a 5.5-kW three-phase squirrel-cage machine connected to a gearbox has been used.     

六相感应电机直接转矩控制系统

电压源型逆变器驱动的六相感应电机有64个综合电压矢量,对准"定子电流谐波最小"这一控制目标,选择机电能量转换子空间(dq子空间)的12个最大矢量进行合成,得到12个零序平衡矢量。在此基础上,优化设计出一种新型六相直接转矩控制(DTC)系统,使零序子空间(z1z2,o1o2子空间)的定子谐波电流小,从而有效控制定子损耗、减小转矩脉动。在Simulink环境下建立起各部分仿真模块和总体仿真模型,仿真结果验证了控制策略的正确性和有效性。