基于DSP的永磁同步电机全速范围转子定位

针对传统永磁同步电机矢量控制过程中,需要精确的转子位置进行坐标轴系变换问题,采用一种基于DSP的永磁同步电机转子位置检测和初始定位的方法。该方法在电机静止时使用改进的磁定位法,通过分别两次输出直流转矩,将转子先牵引出定位盲区,然后固定到预定位置进行转子初始定位;在电机运行后采用改进的M/T法,以及可变的采样时间测量速度和转子位置信息。同时在实验平台上验证了该方法,实验结果表明该方法能准确定位转子初始位置,电机在低速和高速时能准确测出转子位置信息,且具有一定的可靠性和有效性。     

永磁同步电机矢量控制系统的EKF无传感器控制策略

介绍了一种基于扩展卡尔曼滤波的永磁同步电机无传感器转子位置与速度估算方法,并以此为基础实现了永磁同步电机的无传感器矢量控制系统。通过测量流过电机定子电流和电机端电压在线估计电机转子的位置和速度,实现永磁同步电机的无传感器控制策略。仿真和实验结果验证了该方案的可行性及有效性。     

基于dSPACE的永磁同步电机矢量控制系统研究

在讨论永磁同步电机转子三种基本结构基础上,建立了永磁同步电动机在旋转坐标系下的数学模型。提出基于转子磁链定向的永磁同步电机转速、电流双闭环矢量控制策略,并在Matlab/Simulink环境下搭建系统模型,进行仿真验证。最后,构造以dSPACE1103为核心的永磁同步电动机实验平台,对一台1.5kW的面贴式永磁同步电动...     

基于新型锁相环的水下推进永磁同步电机无位置传感器控制

本文针对水下推进永磁同步电机无位置传感器控制中,基于传统锁相环的龙伯格观测器无法同时处理永磁同步电机正向和反向运行所带来的转子位置误差问题,提出了一种基于新型锁相环的龙伯格观测器转子位置辨识方法。该方法在双闭环矢量控制系统的基础上,先由龙伯格观测器估算电机的反电动势,再将反电动势作为新型锁相环的输入,在所设计的新型锁相环中,鉴相器模块是实际转子位置与估计转子位置间的比较环节,压控振荡器模块是转速积分得到转子位置,环路滤波器模块是PI调节,最终由锁相环辨识转子位置和速度。仿真结果表明,该方法较传统锁相环在转子位置方面具有较高的辨识精度、能够实现永磁同步电机在正向和反向工况下转子位置误差均可收敛的功能。     

基于单霍尔传感器的转子位置检测电路的设计

在永磁同步电机矢量控制系统中,常需要高分辨率的转子位置信号.通过设计一个转子位置检测电路将低分辨率的霍尔信号转换成高分辨率的转子位置信号.详细分析了转子位置检测电路的原理,同时对该位置检测电路的静态预估误差和动态过程进行了分析.该电路用于一台高速永磁同步电机驱动系统中,实现了高速永磁同步电机的正弦波驱动的稳速控制.实验结果验证了该文所设计电路的可行性.     

基于DSP和FPGA的望远镜伺服控制系统设计

针对交流永磁同步电机驱动的大型望远镜的高精度、低速平稳运行问题,研制了一套基于浮点数字信号处理器（DSP）和现场可编程逻辑门阵列（FPGA）的驱动控制器。该控制器以DSP 作为主控制器,FPGA 作为协控制器,主控制器完成控制算法、接受指令等功能,协控制器实现PWM 产生、电流采集、速度检测等功能。根据永磁同步电机矢量控制原理建立了永磁同步电机的数学模型,进行了永磁同步电机控制器的硬件设计;在硬件设计的基础上,采用自适应PI 对望远镜的低速控制性能进行了研究。实验结果表明:当望远镜以32.4 （）/s 匀速运行时,速度波动范围为0.648 （）/s;当对望远镜做最大速度为1（）/s,最大加速度为1（）/s2 的正弦引导时,最大引导误差为9.72 ,引导误差RMS 值为3.24 ;该驱动控制系统能够实现望远镜的低速平稳运行,满足大型望远镜伺服控制系统的性能要求。     

随机载波PWM控制对PMSM谐波抑制的研究

在三相逆变器驱动的永磁同步电机运行过程中,相电流谐波会使永磁同步电机的定子、转子的损耗增大.在严重的电流谐波的影响下,电动机振动和噪声增大,严重影响永磁同步电机的正常运行.针对上述影响,本文引入一种随机载波频率PWM技术,通过随机化载波频率,生成随机频率的PWM波,经逆变器后,对相电流进行适当滤波后控制永磁同步电机,来抑制在控制永磁同步电机运行过程中的相电流和转速谐波,提升永磁同步电机的控制性能.通过与传统的PWM控制方案对比,在仿真和实验结果中发现,随机载波PWM方案对相电流和电机转速的谐波抑制有良好的效果.     

基于MRAS的永磁同步电机直接转矩控制系统的研究

研究了一种基于模型参考自适应无速度传感器的永磁同步电机直接转矩控制系统:将永磁同步电机的磁链模型作为参考模型,估算的定子磁链模型作为可调模型,设计了自适应定律对电机的转速与定子电阻同时进行跟踪辨识,使用空间电压矢量调制技术组成了永磁同步电机无速度传感器直接转矩控制系统。仿真实验结果表明该系统获得了近似圆形的定子磁链,在转速与转矩变化时均能准确的估算出电机转速,具有良好的动、静态性能。     

基于TMS320F28335的车用永磁同步电机控制器设计与研究

为优化电动汽车用永磁同步电机控制器性能,增强控制实时性,设计了一套以浮点型TMS320F28335数字信号处理器(DSP)为控制核心的电动汽车用永磁同步电机(PMSM)控制器,采用id=0的矢量化控制技术作为永磁同步电机控制策略,建立电机控制模型,根据模型设计了硬件电路和控制程序,并对控制器控制效果进行了实验验证。实验表明:该控制器响应速度快,转速波动和超调量较小,控制效果理想,具有较好的动静态响应特性。     

利用DSP控制直流无刷电机

直流无刷电机实际属于永磁同步电机,一般转子为永磁材料,随定子磁场同步转动。这种电机结构简单,而且由于移去了物理电刷,使得电磁性能可靠,维护简单,从而被广泛应用于办公自动化、家电等领域。直流无刷电机运行过程要进行两种控制,一种是转速控制,也即控制提供给定子线圈的电流;另一种是换相控制,在转子到达指定位置改变定子导通相,实现定子磁场改变,这种控制实际上实现了物理电刷的机制。因此这种电机需要有位置反馈机制,比如霍尔元件、光电码盘,或者利用梯形反电动势特点进行反电动势过零检测等。利用光电编码器的系统在软件实现上更方便…     

Implementation and experimental investigation of sensorless speed control with initial rotor position estimation for interior permanent magnet synchronous motor drive

In this paper, a new approach to sensorless speed control and initial rotor position estimation for interior permanent magnet synchronous motor (IPMSM) drive is presented. In rotating condition, speed and rotor position estimation of IPMSM drive are obtained through an extended Kalman filter (EKF) algorithm simply by measurement of the stator line voltages and currents. The main difficulty in developing an EKF for IPMSM is the complexity of the dynamic model expressed in the stationary coordinate system. This model is more complex than that of the surface PMSM, because of the asymmetry of the magnetic circuit. The starting procedure is a problem under sensorless drives, because no information is available before starting. The initial rotor position is estimated by a suitable sequence of voltage pulses intermittently applied to the stator windings at standstill and the measurement of the peak current values of the current leads to the rotor position. Magnetic saturation effect on the saliency is used to distinguish the north magnetic pole from the south. To illustrate our work, we present experimental results for an IPMSM obtained on a floating point digital signal processor (DSP) TMS320C31/40 MHz based control system.     

基于龙贝格观测器的PMSM无位置传感器控制系统设计

针对基于低分辨率霍尔位置传感器的永磁同步电机系统在中高速时出现的估算精度低与响应速度慢等问题,在建立永磁同步电机数学模型的基础上,将龙贝格观测器与锁相环结构相结合,提出一种永磁同步电机无位置传感器控制算法。利用MATLAB/Simulink工具搭建控制系统仿真模型验证该控制系统的可行性,并通过搭建基于PAC5232的实物平台对比验证龙贝格观测器相对于霍尔位置传感器的优越性。实验结果表明,该无位置传感器控制系统有效地提高了系统的响应速度和估算精度,使其能够更好地跟踪转子速度以及转子位置信息。     

Real-time IP position controller design with torque feedforwardcontrol for PM synchronous motor

A digital signal processor (DSP)-based permanent magnet (PM) synchronous motor (SM) drive with a proposed recursive least-square (RLS) estimator and real-time integral-proportional (IP) position controller is introduced in this study. First, the rotor inertia constant, the damping constant, and the disturbed load torque of the synchronous motor are estimated by the proposed RLS estimator, which is composed of an RLS estimator and a torque observer. Next, the IP position controller is real-time designed according to the estimated rotor parameters, to match the time-domain command tracking specifications. Then, the observed disturbance torque is fed forward, to increase the robustness of the synchronous motor drive     

A high-performance sensorless indirect stator flux orientation control of induction motor drive

A new method for the implementation of a sensorless indirect stator-flux-oriented control (ISFOC) of induction motor drives with stator resistance tuning is proposed in this paper. The proposed method for the estimation of speed and stator resistance is based only on measurement of stator currents. The error of the measured q-axis current from its reference value feeds the proportional plus integral (PI) controller, the output of which is the estimated slip frequency. It is subtracted from the synchronous angular frequency, which is obtained from the output integral plus proportional (IP) rotor speed controller, to have the estimated rotor speed. For current regulation, this paper proposes a conventional PI controller with feedforward compensation terms in the synchronous frame. Owing to its advantages, an IP controller is used for rotor speed regulation. Stator resistance updating is based on the measured and reference d-axis stator current of an induction motor on d-q frame synchronously rotating with the stator flux vector. Experimental results for a 3-kW induction motor are presented and analyzed by using a dSpace system with DS1102 controller board based on the digital signal processor (DSP) TMS320C31. Digital simulation and experimental results are presented to show the improvement in performance of the proposed method.     

A nonlinear reduced order observer for permanent magnet synchronousmotors

This paper introduces a nonlinear reduced order observer for speed and rotor position estimation in permanent magnet synchronous motors (PMSMs). The observer is based on a model of the motor represented by stationary two-axes coordinates. The theoretical principles of the proposed observer are discussed. Sufficient conditions for convergence as well as convergence speed are established. The observer is designed and tested by simulation. The results show that the observer gives a good estimation of speed and rotor position. In addition, it has low sensitivity to torque disturbances and perturbations of the mechanical parameters     

Sensorless full-digital PMSM drive with EKF estimation of speed androtor position

This paper concerns the realization of a sensorless permanent magnet (PM) synchronous motor drive. Position and angular speed of the rotor are obtained through an extended Kalman filter. The estimation algorithm does not require either the knowledge of the mechanical parameters or the initial rotor position, overcoming two of the main drawbacks of other estimation techniques. The drive also incorporates a digital d-q current control, which can be easily tuned with locked rotor. The experimental setup includes a PM synchronous motor, a pulsewidth modulation voltage-source inverter, and floating-point digital-signal-processor-based control system     

交流电机数学模型及调速系统与实心转子永磁同步电动机齿槽转矩削弱方法研究

本文就对交流电机数学模型及调速系统,以及实心转子永磁同步电动机齿槽转矩削弱方法进行仔细的分析和研究,仅供参考。     

AVS熵编码C64x＋优化

AVS标准中,熵编码模块是比较耗时的模块,对其优化可以提高整个编码器的编码速度。 DSP平台片内存储器空间较小,为此本文对AVS熵编码算法模块进行分析,提出了一种使用较少存储空间来存储码表的方法。以TI公司C64 x＋DSP为例,介绍了超长指令字和打包数据处理结构特性,并分析了基于这些特性的AVS熵编码的快速实现方法。利用TI公司的仿真工具CCS3．3提供的性能分析工具对汇编级优化的效果和C语言级优化的效果进行比较,帧内熵编码模块汇编级优化效果所需时钟周期约为C语言级优化周期的17．62％,帧间熵编码模块汇编级优化效果所需时钟周期约为C语言级优化周期的13．93％。