异步电机无速度传感器矢量控制的实现

介绍了一种交流异步电机无速度传感器矢量控制实现方案。该方案结合了传统的电流和电压磁链观测方法的优点,采用改进的磁链观测方法,在电机高速和低速运行时都能准确地观测磁链,从而估算出电机速度,实现无速度传感器的矢量控制。该实现方案基于高性能数字信号处理器TMS320F2806。试验表明,它在高速和低速段都其有较好的性能。     

无刷直流电动机的数字信号处理器控制

基于定子三次谐波法检测转子位置的方法,采用TMS320LF2407数字信号处理器(DSP)构成了一高性能的无刷直流电动机双闭环无位置传感器的调速系统。提出了采用粒子群算法对电流和转速调节器的PID参数进行整定,设计出了速度和电流调节器的最佳参数。     

一种改进的无速度传感器感应电机直接转矩控制

直接转矩控制(DTC)对于异步电机而言，它能产生快速及好的鲁棒性响应。介绍了一种新的对于无速度感应电动机基于空间矢量(SVM)模型的直接力矩和磁链控制，它能降低稳态时力矩、磁链和速度的波动。在全速度范围无速度传感应用中将产生更好的稳态性能的同时保留DTC的暂态优点。仿真结果显示该方法有着比传统的DTC更好的性能。     

开关磁阻电机无位置传感器技术的分析

阐述了开关磁阻电机中取消转子位置传感器的理沦依据，介绍了一种对中小功率开关磁阻电机可行的无位置传感器测量技术方案，同时介绍了一种利用数字信号处理器(DSP)测量SRM静态磁链特性的试验方法，最后结合一个3kW开关磁阻电机的无位置传感器的设计实例，验证了方案的可行性。     

Sensorless Vector Control of Induction Motors Using Minimum Dimensional Flux D‐State Observer with Instantaneous Speed Estimation

This paper proposes a new sensorless vector control method for induction motors using a minimum dimensional flux D‐state observer with instantaneous speed estimation. First, the D‐state observer with a new design rule of constant observer gains is established in a different way. Second, a new speed estimator using flux estimates produced by the observer is established on the basis of the fundamental relationship between the rotor flux and the slip frequency. Speed estimates are reused in the observer as feedback. Characteristic analyses and the usefulness of the proposed vector control method are verified by simulations.     

Wind Velocity Sensorless Maximum Power Point Tracking Algorithm in Grid-connected Wind Energy Conversion System

This article proposes a wind velocity sensorless hill-climb searching algorithm in the grid-connected field-oriented controlled permanent magnet synchronous generator based wind energy conversion system. The proposed method improves the speed and accuracy of initial tracking. Pseudo-optimum points are used to track the exact optimum points using the power versus speed characteristics of a wind turbine for various wind velocities. This research emphasizes that the pseudo-optimum points using the power versus speed characteristics are always less than and much nearer to the exact optimum points. The small-step forward tracking after pseudo-optimum points improves the accuracy of this algorithm. Moreover, this method improves the tracking speed for various wind velocities. The system used for this research consists of a back-to-back sinusoidal pulse-width modulation converter between the generator and the grid. The performance of the proposed method is analyzed mathematically and verified by simulation using MATLAB/Simulink software (The Mathworks, Natick; Massachusetts, USA).     

一种新型SPMSM无位置传感器驱动系统研究

针对表贴式永磁同步电机(SPMSM),提出了一种基于新型反电动势观测器的无位置传感器驱动系统控制方案。为了实现无传感器控制,该系统在传统反电动势观测器的基础上进行了一定的改进,并引入锁相环(PLL)来确保估算器能够快速、准确地获取转子位置信息和转速信息,从而实现电机的转子磁场定向及转速调节。建立了系统数学模型、控制系统结构框架,并且对该速度/位置估算器原理进行了理论分析及Matlab仿真验证。最后,基于TMS320F2808的永磁同步电机实验平台进行了相关实验,实验结果验证了该控制算法具有调速范围宽、动态响应快、带载能力强及系统可行性、实用性强等特点。     

基于高频注入法永磁同步电机控制研究

针对永磁同步电机无传感器控制的启动控制问题,即在电机处于低速运行或者静止启动时转子位置难以检测和估算,采用高频注入法实现对永磁同步电机的启动控制,并采用判断响应旋转电流幅值N/S判断方法判断转子极性。利用MATLAB与PSIM联合建模进行了相应的实验仿真。实验仿真结果验证表明:采取旋转高频注入法可以有效地实现永磁同步电机的启动控制,克服了无传感器控制在静止状态的不精确的缺点。     

基于扩展滑膜控制器的PMSM无速度传感器研究

本文设计了一种基于永磁同步电机（PMSM）直接转矩控制（DTC）的扩展滑膜观测器,通过测量定子电压与电流,获得电机的转速和转子位置。MATLAB仿真结果表明,扩展的滑膜观测器在空间矢量电压直接转矩控制（SVPWM-DTC）中,所得转速更接近实际转速。     

“Disturbance observers in D‐module” for sensorless drive of synchronous motors—new phase estimation with zero phase lag

This paper proposes two new “disturbance observers in the D‐module” for sensorless drive of synchronous motors including permanent‐magnet synchronous motors and synchronous reluctance motors. The disturbance filter for the observers can estimate speed‐varying rotor phase (in other words, rotor position) with zero phase lag. It is constructed by means of “the filter in the D‐module,” which has the following desired characteristics for variable sensorless drive: (1) it makes distinction between positive and negative frequencies of two‐phase signals; (2) it can allow processing of the signals based on frequency polarities; (3) it can also change dynamically its center frequency of bandpass filtering according to rotor speed estimates; (4) its passband and transition can be designed independently; and (5) it can be easily realized. The new disturbance observers also have a generality such that they contain the recently proposed disturbance observer as a special case. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(3): 63–70, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20602