共查询到19条相似文献,搜索用时 171 毫秒
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无刷直流电动机系统中,转子的位置信号对于整个系统的正常工作是至关重要的。以往转子位置信号是通过位置传感器检测得到的,然而传感器检测有受环境影响较大等缺点。目前,无位置传感器控制技术成为研究的热点。本文针对使用反电势过零点检测转子位置的无传感器BLDCM系统,讨论了其换相策略、PWM调制控制方式、起动控制方案,并进行了仿真研究。 相似文献
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根据无刷直流电机端电压检测法实现无位置传感器控制的原理,搭建了无位置传感器无刷直流电机控制系统仿真平台,并对所设计的双闭环调速系统进行仿真验证。本文提出一种搭建转速检测模块的新方法,它模拟了实际控制系统中软件计算转速的方法,这使搭建的仿真模型对实际无位置传感器控制系统的研究更有参考意义。 相似文献
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该文提出了一种利用霍尔传感器提取无刷直流电机开环加速启动参数,通过计算拟合,将其应用到无传感器控制策略中,从而实现无刷直流电机无传感器可靠起动的新方法。用数学方法对无刷直流电机的速度计算公式进行了推导,并用Matlab、Maxwell软件对400 W电机样机参数进行了仿真,仿真结果表明理论推导的正确性。利用400 W电机样机进行了实验,实验结果表明,在0~400 W功率范围内,电机均可无传感器顺利启动,速度稳定在1500 r/min,扭矩达到27 kg.cm,效率最高达到85.5%。 相似文献
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无位置传感器无刷直流电机控制的简易方法 总被引:5,自引:0,他引:5
介绍了Micro Linear公司生产的ML4428无刷直流电机无传感器PWM智能控制器的内部结构,它是无位置传感器无刷直流电动机控制的简易方法,该控制器内部的反电势电路、起动及换向逻辑电路、限流比较器和保护电路简化了无位置传感器无刷直流电动机的控制,做到单独控制的正反向运行,起动时无反转,采用PWM控制或最小噪声的线性控制,可获得最高效率。 相似文献
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无位置传感器控制技术是近30年来无刷直流电机(BLDCM)研究的一个重要方向。论述了国内外BLDCM无位置传感器控制的研究现状。着重介绍了目前应用和研究较多的几种常规方法的基本原理、实现途径、应用场合以及优缺点等,并对它们作了综合分析和比较。 相似文献
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基于无轴承永磁同步电机的矢量控制系统,提出了采用扩展卡尔曼滤波器实现无速度传感器运行的控制策略。通过测量电机的端电压和流过定子线圈的电流在线估计电机转子的速度,实现具有较强自适应和抗干扰能力的无轴承永磁同步电机无传感器调速系统。建立了无轴承永磁同步电机状态方程及扩展卡尔曼滤波器速度估计离散算法。在MATLAB/Simulink环境下构建了无速度传感器运行仿真系统,对速度的辨识、电机的动态特性进行了仿真。仿真结果表明:扩展卡尔曼滤波器的速度辨识精度较高,具有良好的鲁棒性,基本满足无轴承电机无传感运行的要求。 相似文献
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基于无轴承永磁同步电机的矢量控制系统,提出了采用扩展卡尔曼滤波器实现无速度传感器运行的控制策略。通过测量电机的端电压和流过定子线圈的电流在线估计电机转子的速度,实现具有较强自适应和抗干扰能力的无轴承永磁同步电机无传感器调速系统。建立了无轴承永磁同步电机状态方程及扩展卡尔曼滤波器速度估计离散算法。在MATLAB/Simulink环境下构建了无速度传感器运行仿真系统,对速度的辨识、电机的动态特性进行了仿真。仿真结果表明:扩展卡尔曼滤波器的速度辨识精度较高,具有良好的鲁棒性,基本满足无轴承电机无传感运行的要求。 相似文献
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基于DSP的新颖无刷直流电机控制器设计 总被引:1,自引:0,他引:1
利用DSP2812设计了一个无位置传感器电机控制系统,该系统利用三相四开关电路对无刷直流电机(Brushless DC Motor,简称BLDCM)进行驱动,采用了新颖的无位置传感器控制方法和脉宽调制(PWM)方法.最后通过分析和试验证明了该系统的可行性. 相似文献
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《Electric Power Systems Research》2007,77(5-6):619-629
Sensorless control is considered to be a lower cost alternative than the position or speed encoder-based control of induction motors. Two popular sensorless control methods, namely, the model reference adaptive system (MRAS) and the Luenberger observer (LO) methods are compared for speed and torque control characteristics. They are also compared against the well-known vector control principle. For the drive system simulated, the torque and speed obtained from sensorless control are almost identical to those obtained from the vector control method. However, the torque ripple for the sensorless methods is observed to be higher than vector control-based method. The MRAS method introduces higher torque ripple when compared to the Luenberger observer. In addition, speed estimation methods employed in sensorless control are more sensitive to motor parameter variations. 相似文献
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针对电机运行过程中参数变化会影响永磁同步电机(PMSM)无位置传感器控制性能的问题,将递推的最小二乘法(RLS)用于PMSM参数的在线辨识,在最大转矩电流比控制策略下,使用基于BP神经网络改进的模型参考自适应系统构建无位置传感器控制方案,提出了基于在线参数辨识的PMSM无位置传感器控制方案。运用递推的RLS对PMSM的交轴电感和转子磁链进行在线辨识,并将参数辨识结果应用于电机无位置传感器算法中。仿真和试验证明了基于递推的RLS参数辨识算法可以对PMSM的转子磁链和交轴电感值进行准确辨识,基于参数辨识的PMSM无位置传感器控制方案性能更好。 相似文献
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In the case of the sensorless control for the PMSM that estimates position and velocity from EMF using a model of synchronous motor with the voltage and current, it is desirable for voltage and current to be perfect sine waves. However, in reality, voltage and current contain various harmonic components, which negatively affect the estimation ability of the sensorless control. In this paper, we propose a method of improving the sensorless control performance for the IPMSM by suppression of harmonic component in current control loop of the vector control using Fourier transform and repetitive control. To suppress harmonic components, compensation signals are acquired using Fourier transform and repetitive control, and feedforward control is implemented with the acquired compensation signals. To evaluate the proposed system, the sensorless control system for the IPMSM is considered as an example. The system is constructed on the basis of the extended EMF disturbance observer, and the improvement potential of the sensorless control performance is demonstrated. The effectiveness of the proposed method is confirmed by experimental results. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 159(4): 76–86, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20095 相似文献
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In this article, a generalized sensorless method for SRM drives has been explained. By continuous monitoring of the back-EMF, the best version of the sensorless technique is selected and engaged. The robust performance obtained from this technique makes it as attractive candidate for industrial as well as domestic applications. Furthermore, a four-quadrant strategy under sensorless control has been designed and implemented. The proposed method demonstrates simplicity in computation while providing high-precision position information with no extra hardware or memory. The proposed algorithms have been implemented on an experimental SRM test setup. Our findings show that four-quadrant sensorless control of the SRM drive is a feasible technique and can be considered as a technology ready for application. This technique is especially helpful where the characteristics of the application calls for operating in two/four-quadrants or when a closed-loop speed/position control with sensorless strategy is demanded. 相似文献