共查询到19条相似文献,搜索用时 773 毫秒
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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。 相似文献
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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。 相似文献
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非线性伺服系统广泛存在于诸多实际应用的控制领域当中,例如工业机器人、航空航天以及永磁同步电机中等,但是此类系统往往还伴随外部干扰等一系列不确定性的问题。在针对伺服系统的控制策略当中,由于滑模控制对上述不确定性具有良好的控制效果而被广泛研究。所以为了提高永磁同步电机(PMSM)的抗干扰能力,设计了滑模控制器对永磁同步电机的转速展开控制。首先,在自然坐标系下,构建出永磁同步电机的数学模型,并且将其转化为静止的坐标系和常用的d-q旋转坐标系下的数学模型;其次,运用滑模控制的原理,采用指数趋近律设计了滑模控制器;最后,进行MATLAB仿真实验验证。仿真结果验证了所提出方法的有效性,设计的滑模控制器可以有效地提高永磁同步电机的抗扰能力,提高系统的鲁棒性,减小系统超调和误差。 相似文献
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本文设计了基于Super-twisting滑模速度控制器的永磁同步电机直接转矩控制系统,仿真分析了参数变化对系统输出特性的影响,分析结果表明,采用Super-twisting滑模速度控制器的永磁同步电机直接转矩控制系统比采用PI速度控制器的永磁同步电机直接转矩控制系统的鲁棒性强。 相似文献
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在现代雷达控制系统中,伺服系统的转速稳定性和定点精度,直接影响到最终成像品质。文中针对伺服系统常用的永磁同步电机控制器中的功率器件金属-氧化物半导体场效应晶体管(MOSFET)展开研究,主要分析了MOSFET的米勒效应,介绍了MOSFET的电路模型和开通过程,分析了米勒平台电压的振荡原因和米勒效应对驱动电路的危害,并设计两种优化电路来抑制米勒效应。理论分析和实验结果表明,经过改进的驱动电路有效抑制了米勒效应产生的栅源脉冲电压尖峰。所设计电路已应用于20 kHz/1 kW永磁同步电机驱动器,有效提升了雷达伺服系统的环境适应性和稳定性。 相似文献
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为获取永磁同步电机转子速度,设计了一种基于DSP控制器正交编码电路和光电编码盘的检测系统。DSP识别光电编码盘上光敏管所产生的两路正交编码脉冲,对捕获的脉冲信号进行加减计数,通过对DSP编写的用户程序读取当前计数值,计算电机转子转速。阐述了TMS320F243芯片正交编码和增量式光电编码盘的工作原理,建立了由永磁同步电机、DSP板、逆变功放板和PC机组成的实验测量装置。实验结果表明,在给定的转速设定值下,能够实现快速和较高精度的速度检测,能够满足一般工程系统对交流调速和伺服控制的性能要求。 相似文献
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Tian-Hua Liu Chung-Ming Young Chang-Huan Liu 《Industrial Electronics, IEEE Transactions on》1988,35(4):516-523
The speed control of a permanent magnet (PM) synchronous motor drive that is fed by a current hysteresis-controlled voltage-source inverter is investigated. The objective is to study the feasibility of implementing a microprocessor-based controller that may achieve complete software control of motor speed. A mathematical model and a digital control principle for controlling the PM synchronous motor are described. The sampling period and the controller parameters are determined analytically according to a linearized model. A systematic simulation procedure is proposed for verifying the feasibility of theoretical modeling and controller design. An experimental prototype system is constructed for correlating with the theoretical results. The experimental results closely follow theoretical predictions, thus validating the proposed control method 相似文献
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在工业自动化领域,永磁同步电动机在中小功率控制系统中发挥着重要作用。本项目采用多采样率方法构建永磁同步电机控制系统,其主要解决的问题包含多采样率下的速度及参数辨识、永磁同步电机多采样率滑模变结构控制系统设计。 相似文献
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永磁同步电机因其优越的性能近年来得到了广泛应用。针对双闭环控制器参数整定困难所导致的控制效果不佳的问题,文中提出了基于极点配置和Ramp函数的改进型双闭环PI控制器。从永磁同步电机矢量控制算法的角度出发,建立了速度、电流双闭环解耦控制的系统模型,并在此模型下论述了速度环、电流环控制器的设计方法,给出改进后双闭环控制器参数的计算结果。对所研究方法分别进行了计算机仿真和实际试验,结果表明优化后的系统减小了系统过冲,缩短了稳定时间,提高了系统动态响应,具有良好的工程意义。 相似文献
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Optimal controller design for a matrix converter based surface mounted PMSM drive system 总被引:8,自引:0,他引:8
Der-Fa Chen Tian-Hua Liu 《Power Electronics, IEEE Transactions on》2003,18(4):1034-1046
This paper proposes a new control algorithm for a matrix converter permanent magnet synchronous motor (PMSM) drive system. First, a new switching strategy, which applies a backpropagation neural network to adjust a pseudo DC bus voltage, is proposed to reduce the current harmonics of the permanent magnet synchronous motor. Next, a two-degree-of-freedom controller is proposed to improve the system performance. The parameters of this controller are obtained by using a frequency-domain optimization technique. The controller design algorithm can be applied in an adjustable speed control system and a position control system to obtain good transient responses and good load disturbance rejection abilities. The controller design procedures require only algebraic computation. The implementation of this kind of controller is only possible by using a high-speed digital signal processor. In this paper, all the control loops, including current-loop, speed-loop, and position-loop, are implemented by a 32-b TMS320C40 digital signal processor. The hardware, therefore, is very simple. Several experimental results are shown to validate the theoretical analysis. 相似文献
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A brief design review of permanent magnet synchronous motors has been presented. A procedure has been developed to predict the steady state and dynamic performances of a brushless permanent magnet synchronous motor. Finite element analysis has been combined with a lumped parameter circuit model in order to provide satisfactory engineering information. To this end, two coordinated steps are involved. One is to develop a unified lumped parameter circuit model for both steady state and dynamic analysis. The second step is to extract the individual lumped parameters from finite element solutions based on corresponding equivalent circuits, each with a pre-determined topology. The proposed techniques have been experimentally verified in a laboratory permanent magnet synchronous motor 相似文献
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Integrated Sliding‐Mode Sensorless Driver with Pre‐driver and Current Sensing Circuit for Accurate Speed Control of PMSM 下载免费PDF全文
Sewan Heo Jimin Oh Minki Kim Jung‐Hee Suk Yil Suk Yang Ki‐Tae Park Jinsung Kim 《ETRI Journal》2015,37(6):1154-1164
This paper proposes a fully sensorless driver for a permanent magnet synchronous motor (PMSM) integrated with a digital motor controller and an analog pre‐driver, including sensing circuits and estimators. In the motor controller, a position estimator estimates the back electromotive force and rotor position using a sliding‐mode observer. In the pre‐driver, drivers for the power devices are designed with a level shifter and isolation technique. In addition, a current sensing circuit measures a three‐phase current. All of these circuits are integrated in a single chip such that the driver achieves control of the speed with high accuracy. Using an IC fabricated using a 0.18 μm BCDMOS process, the performance was verified experimentally. The driver showed stable operation in spite of the variation in speed and load, a similar efficiency near 1% compared to a commercial driver, a low speed error of about 0.1%, and therefore good performance for the PMSM drive. 相似文献