基于DSP的开关磁阻电动机调速方法研究

介绍了一种基于数字信号处理器(DSP)TMS320F240的开关磁阻电动机调速系统导通角的控制方法。充分利用TMS320F240周边接口丰富、运算速度快、适于电动机控制的特点，通过控制导通角使系统运行良好，角度位置达到系统设计要求。     

开关磁阻起动发电机系统及其一体化控制方案

本文首先对开关磁阻起动/发电机的研究现状、系统的组成及方案选取原则进行分析，结合起动和发电过程中角度控制、斩波控制、脉宽调制控制三种控制方案特点，归纳出适合开关磁阻起动/发电机系统的一体化控制策略；最后给出部分试验结果及性能分析，研究表明：开关磁阻起动/发电机系统具有的结构简单坚固、控制灵活等特点，具备很高的容错运行能力、高能量密度和恶劣环境工作能力，在航空及汽车等领域有着良好的应用前景。     

基于ANSYS的开关磁阻电机温度场分析

利用AN SY S有限元软件的热分析功能对125kW的开关磁阻电动机进行了分析与仿真。分析了开关磁阻电机的发热热源、定子线圈等效导热系数、强迫通风冷却条件下通风道内气流散热系数,给出了额定条件下定、转子的温度场分布图。这对于检验设计的电机及其绕组能否在额定状况下长期稳定工作具有一定的指导意义。     

开关磁阻电动机电压斩波续流方式研究

本文基于开关磁阻电动机 (SRM)线性模型 ,对 SR电机电压斩波控制方式的两种续流方式——能量回馈和非能量回馈续流方式的电流和磁链进行了计算 ,比较了它们对转矩脉动的影响。本文研究表明 ,SRM电压斩波控制采用非能量回馈续流方式在抑制转矩脉动和振动噪音等方面较能量回馈续流方式有更好的性能     

Analysis of ferrite orthogonal core for high‐frequency region based on three‐dimensional nonlinear magnetic circuit

This paper presents an operating analysis of a ferrite orthogonal core for high‐frequency power control and power conversion. The analysis is based on the three‐dimensional nonlinear magnetic circuit of the orthogonal core, and is called Reluctance Network Analysis. The magnetization characteristics of the ferrite orthogonal core are calculated accurately by using Reluctance Network Analysis. On the basis of the obtained magnetization curves, we can analyze the operating characteristics of the various application circuits of the orthogonal core. For an example, the control characteristics of a high‐frequency variable inductor using the ferrite orthogonal core are calculated in this paper. © 2001 Scripta Technica, Electr Eng Jpn, 137(4): 10–17, 2001     

开关磁阻电机驱动系统的发展及应用

开关磁阻电机驱动（SRD）系统是继变频驱动系统、无换向器电动机驱动系统之后发展起来的一种新型的、性价比很高的节能调速控制系统。本文就SRD系统的组成、结构、工作原理、特点、国内外的发展情况进行了系统的论述,对目前SRD系统存在的问题及研究课题进行了分析。同时,为推广应用SRD系统提出了一些建议和意见,可供有关人员和企业系统了解及推广应用SRD系统做参考。     

Control characteristics for quasi-optimal operation of switched reluctance motors

This paper presents the control characteristics of switched reluctance (SR) motors defined for the maximum efficiency of the motor or the motor–converter system and for the minimum ripple level of electromagnetic torque. Curves for control variables—switch-on and switch-off angles (or conduction angle) and average phase voltage—are obtained by computations from a simple mathematical model. This lumped-parameter model takes into account the magnetic saturation of the motor and the parameters of the power converter necessary to guarantee reliable results concerning power losses in the system. The investigations were carried out for two typical SRM with the number of teeth N_s/N_r=8/6 and 6/4 for a battery supply and for a 310-V rectifier supply. Time curves obtained from mathematical model and control characteristics resulting from numerous optimization computations were validated by thorough measurements performed on a special test rig.List of symbols D viscous friction damping, Nms - e_k back EMF in the kth winding, V - i_k current in the kth winding, A - J moment of inertia, kg/m² - L() phase winding's inductance in unsaturated state H - L(,i) phase winding's inductance considering saturation H - m number of phases - N_s/N_r number of teeth: stator/rotor - n rotational speed, 1/s - R phase winding's resistance, - R_i current measurement resistor value, - R_k total resistance in the kth phase circuit, - R_s resistance of a power source, - R_TDSat drain-source resistance of a transistor in the saturated state - r_D dynamic resistance of a diode, - T_e electromagnetic torque, Nm - T_l load torque, Nm - u_k voltage of the kth phase, V - U phase voltage RMS value, V - U_av phase voltage average value, V - _on switch-on angle, rad - _off switch-off angle, rad - _z=_on–_off conduction angle, rad - stroke angle of the motor, rad - _s efficiency of a motor - _u efficiency of a motor–converter system - rotor position angle, rad - (,i) saturation function of the winding's inductance - m_p level of the torque ripples, % - _r=2/N_r, rad rotor tooth pitch - _k rotor position angle reduced to the kth tooth-pitch, rad - (,i) flux linkage of a phase winding, Wb - angular velocity, rad/s - angular acceleration, rad/s²     

基于滑模变结构的开关磁阻电机角度控制

针对开关磁阻电机(SRM)常规线性方法控制效果不理想以及高速运转时以相电压作为控制量的不合理性的问题,在分析开关磁阻电机开通、关断角对输出转矩的作用以及SRM数学模型的基础上,提出了基速以上时以关断角作为控制量的滑模变结构角度控制方法,并基于此方法设计了实验系统,实验结果表明:该系统具有良好的动静态性能,具有较强的鲁棒性。     

基于开关磁阻调速电动机的矿用智能局部通风系统

为满足煤矿对局部通风机自动调速的需求,设计了一种基于开关磁阻调速电动机的矿用智能局部通风系统。它采用开关磁阻调速电动机驱动,并以S7-200 PLC控制器和上位机组态的监控模式,根据井下传感器采集的瓦斯浓度信号实现自动按需通风,排放瓦斯功能。该系统经运行试验表明,取得了很好的节能效果。     

基于神经网络的开关磁阻电机转子位置估计

位置检测是开关磁阻电机调速系统中的重要环节.实时、准确的位置是开关磁阻电机正确运行的关键.由于其转子位置角是各相磁链与电流的高度非线性函数,传统线性及解析的方法难以精确求得.该文基于神经网络并行处理及逼近任意非线性函数的特点,提出了基于神经网络的位置检测方案.借助于MATLAB的神经网络工具箱,采用三种改进的学习算法对试验数据样本进行了离线训练,确定了用于位置检测的神经网络模型.为验证模型的有效性和准确性,对大量的数据样本进行了仿真.结果表明：该方法能够快速、准确地测量转子位置,鲁棒性和自适应性强.