基于DSP的开关磁阻电机调速系统研究与设计

为对开关磁阻电机调速进行实时控制,设计了一款基于DSP的TMS320F2812数字信号处理器为控制核心,设计开发了开关磁阻电机调速系统。以模块化的思想设计了MCU控制系统、位置检测系统、不对称功率电路等模块。给出了软件设计的思想和方法,完成了嵌入式软件系统的开发。该调速系统结构简单、成本低廉、起动转矩大及调速范围宽等优点,具有很好的发展前景。     

开关磁阻电机调速控制技术研究

本文从分析磁阻开关电机的结构特点入手，详细介绍了开关磁阻电机调速系统的工作原理和运行特征，通过理论计算和试验数据结合比较，给出了电机调速控制理论和控制方法。     

开关磁阻电机非线性电磁特性的磁链模型

开关磁阻电机调速系统具有直流和交流调速系统的优点,在航空航天、机械电子、家电等领域获得了广泛的应用。由于开关磁阻电机的磁路饱和、涡流、磁滞效应等产生的非线性,使其精确的数学模型非常复杂,且难以解析计算。本文采用理论推导和曲线拟合的方法,根据开关磁阻电机定子的相电感表达函数,计算得到其电磁特性和拟合曲线,并与实测的磁链数据对比研究,从而推导出开关磁阻电机运动电势和增量电感的解析表达式,为其在线控制系统的设计和研究提供了指导。     

可控交流调速开关磁阻电机

开关磁阻电机是一种80年代以来发展起来的新型的可控交流调速系统。它具有的性能和极高的性能/价格比以及极其宽广的应用领域。     

4相8/6开关磁阻电机建模与仿真

由于开关磁阻电机的双凸极结构特点和开关性供电特点,使其难以简单地用传统电机的分析方法解析计算。在开关磁阻电机数学模型基础上,借助离线堵转实验得到的数据,分析得到了SRM的电感模型,并对该模型进行傅里叶分析,建立基于MATLAB/SIMULINK的开关磁阻电机非线性动态模型。仿真与实验结果证实模型的正确性、控制策略的有效性和系统运行可靠,为将来开关磁阻电机调速系统的优化改进提供了参照。     

基于DSP的电动汽车双轮驱动系统设计

轮式驱动电动汽车采用多个轮毂电机独立驱动车辆-是未来电动车发展的一个重要的方向;开关磁阻电机不仅结构简单、运行可靠、制造成本低,而且调速范围宽、效率高-将其作为纯电动汽车驱动源具有优越性。本文以三相(16/12)极外转子开关型磁阻电机为基础,设计一种以TI公司生产的TMS320F28335 DSP控制芯片为核心的电动汽车双轮驱动系统。同时基于该控制系统,用实验法优化了前述开关磁阻电机的开通角和关断角,得出相电流与电磁转矩之间的关系,以实现通过分配双电机的相电流达到电机转矩的协调控制,从而实现电子差速的目的。     

基于模糊PI控制的开关磁阻电机调速系统的MATLAB仿真

为改善开关磁阻电机（简称SRM ）的非线性特性问题,提高开关磁阻电机调速系统（简称SRD ）的响应特性和稳定性,对 SRD 采用双闭环控制,即速度外环和电流内环。其中速度外环采用模糊 PI 控制技术,借助 MATLAB/SIMULNK对系统进行建模和仿真。将其仿真结果与常规PI仿真结果进行分析比较。结果表明基于模糊PI控制的开关磁阻电机调速系统,响应速度提高了40%,超调量减小1.2%,调节精度和稳定性都大大提高,系统震荡也明显减小。     

开关磁阻电动机调速技术在高炉助燃风机系统的应用

本文简介了开关磁阻电动机调速系统在钢铁厂高炉助燃风机的应用, 开关磁阻电动机调速系统以其优越的调速性能、显著的节能效果、简单的结构特征,越来越多地应用在工业及民用的各领域,被发改委列为国家鼓励发展的技术.     

SR电机在转子位置检测中的应用

连续变速驱动的最新设计能够提高产品性能和系统效率.可以从数字控制中受益的一类电机是开关磁阻电机.相比其他类型的调速驱动,SR电机以其简单的机械构造,高效率和高功率密度,体现出成本和可靠性优势.本文通过对SR电机的原理分析,利用MC56F8006数字信号控制器和专利算法,实现转子位置的检测.     

基于改进的支持向量机的开关磁阻电机的模型建立

开关磁阻电机具有结构简单、工作可靠、运行效率高等优点。但开关磁阻电机的磁路高度饱和、非线性化,很难建立准确的数学模型,难以实现高精度控制。在研究开关磁阻电机的电磁与转矩特性的基础上,结合支持向量机算法在解决小样本、非线性、高维数、局部极小值问题上的优势,建立了径向基函数核函数的支持向量机的开关磁阻电机的数学模型,通过仿真与传统BP神经网络算法对比,证明该算法具有较高的性能,实验平台检测的数据表明,所构建的开关磁阻电机模型是可行的,证明了模型的正确性和有效性。     

开关磁阻电机基于转矩脉动最小化的直接转矩控制技术

开关磁阻电机的主要缺点是转矩脉动较大以及振动和噪声比其他调速系统严重。这里将直接转矩控制技术应用到开关磁阻电机中,以转矩脉动最小化为主要控制目标,在此基础上建立了直接转矩控制的仿真模型。仿真及实验研究表明,直接转矩控制技术能够将磁链矢量幅值很好地控制在滞环带内,从而有效地控制转矩脉动,降低电机的振动和噪声。     

Forward converters for dual voltage switched reluctance motordrives

A new circuit is presented which allows a switched reluctance motor to operate from AC mains or a low voltage battery supply. In addition the AC mains can be used to charge the battery. The switched reluctance motor is used as the voltage-changing transformer, potentially reducing the cost of the system. The operation of the drive is explained, and results of an experimental prototype are presented     

Fault-tolerant switched reluctance motor drive using adaptive fuzzy logic controller

An adaptive fuzzy controller has been designed to develop a high-performance fault-tolerant switched reluctance motor (SRM) drive. The fuzzy controller continuously adapts its properties to regulate the machine torque as desired by the drive system even under fault conditions. The adaptation of the fuzzy membership functions results in extended conduction period and increased peak current of the healthy phases to deliver the commanded torque, as much as possible. The adaptive fuzzy controller provides smooth torque output with minimum ripple, even under fault conditions, yielding a high-performance SRM drive with fault-tolerant capability.     

Robust speed control of a switched reluctance vector drive usingvariable structure approach

The robust speed control of a switched reluctance vector drive is presented in this paper. An approximate sliding-mode input power controller and another feedforward sliding-mode speed controller are combined with space voltage vector modulation. The resultant drive has rapid and robust speed response. In addition, a switched reluctance motor (SRM) drive incorporating the proposed controller requires only one current sensor and can be implemented in a low-cost 8-bit microcomputer and a few discrete integrated circuits. Furthermore, the controller does not require any offline characterization of the motor or load characteristics and could easily be applied to SRMs with any number of phase windings. A 4 kW four-phase SRM drive is constructed to test the performance of the controller. The results show that a step response from 200 to 1980 RPM needs only 2-3 s, even when driving a high-inertia load, and that the speed error can be controlled below 1%, even under unknown and dynamic loads. It is concluded that modified sliding-made controllers are effective in dealing with the highly-nonlinear characteristics of the SRM drive system     

电机控制用多输出开关电源设计

针对30kW开关磁阻电机控制系统的需要，本文设计了Flyback辅助开关稳压电源。此电源给系统控制板以及IGBT驱动电路供电，并保证电源电压稳定，纹波不大于3％，控制板电源与驱动电路电源以及IGBT驱动电路电源之间相互隔离。本文重点论述了开关电源的电路设计及高频变压器的设计，并给出实际纹波波形。本文设计的开关电源经现场检验．性能良好。本开关电源经改动后也适用与其他使用IGBT器件的电力电子装置。     

A novel sliding-mode observer for indirect position sensing ofswitched reluctance motor drives

A switched reluctance motor (SRM) drive generally requires a rotor position sensor for commutation and current control. However, the use of this position sensor increases both cost and size of the motor drive and causes limitations for industrial applications. In this paper, a novel indirect position sensing technique, namely, the sliding-mode observer, is proposed for SRM drives. The corresponding design approach and operating performance are provided to illustrate the fast convergence and high robustness of the observer against disturbances and variations     

A novel switched reluctance motor drive with optical graphicalprogramming technology

Due to magnetic nonlinearities, switched reluctance motor (SRM) drive control is complicated and normally requires a microprocessor or a digital signal processor. This paper presents a simple and reliable SRM drive using an innovative encoder based on optical graphical programming technology. There is no microprocessor in the drive, no A/D or D/A circuitry, with a drive system that matches the simplicity of the motor construction. It features a simple and effective control capability. Current waveform optimization for the encoder is carried out offline, for high efficiency, and programmed directly into the encoder. Experimental results validate the concept     

“航空电机及电气传动”课程机辅教学实践

本文以"航空电机及电气传动"课程中开关磁阻电机及其系统为例,利用电磁场有限元分析及电力电子仿真软件,以电机的基本结构、工作原理、工作特性和应用场合为主线,进一步直观呈现其磁场分布及电气传动系统运行曲线,使得理论教学内容紧密结合工程实际。本文所述的软件对于其他电机及其电气传动系统的教学具有一定的参考价值,亦可用于学生本科毕业设计环节。     

Performance analysis of photovoltaic pumping systems using switched reluctance motor drives

A photovoltaic (PV) pumping system using a switched reluctance motor (SRM) is investigated in this work. the motor is supplied by a DC voltage through a simple switching circuit. This drive circuit is much simpler than the normal DC/AC inverter required to supply an induction motor. the efficiency of the SRM is considerably higher than that of equivalent DC or induction motors. In addition, because of its simple construction, the SRM is cheaper than these conventional drives. These advantages give the proposed system higher efficiency and lower cost compared with other systems. In this paper, which has a substantial tutorial content, a design example is studied in detail to explore the advantages of PV pumping systems based on the new drive. Study of the performance of the proposed system showed that the operating efficiency of the motor is about 85% during most of its working time. the matching efficiency between the PV array and the proposed system approaches 95%. the major part of the losses takes place in the pump and the riser pipes; this loss represents one-third of the total available energy.