共查询到19条相似文献,搜索用时 415 毫秒
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为了提高异步电机无速度传感器矢量的控制性能,将无速度传感器矢量与其矢量控制结合起来,组成一种基于TMS320F2812的无速度传感器直接转矩控制系统.本文主要介绍了硬件实现其软件实现方法,并且通过MATLAB/Simulink仿真验证了所提出方法的有效性使系统具有良好的动态性能以及稳定性,实现了DSP无速度传感器直接转矩控制. 相似文献
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无速度传感器直接转矩控制方案的设计和仿真 总被引:2,自引:0,他引:2
直接转矩控制是一种高性能的交流传动控制策略,无速度传感器控制的研究代表了直接转矩控制系统的一个发展方向.在直接转矩控制理论基础上,推导出一种基于定子磁链矢量增量来确定定子参考电压矢量的新型无速度传感器直接转矩控制方案.该方案还能对转矩和磁链实现良好的控制功能.计算机仿真结果证明了方案的可行性. 相似文献
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针对永磁同步电机(PMSM)直接转矩控制系统(DTC),提出一种不需要计算平方根的Unscented卡尔曼滤波(UKF)算法,即UDUTUKF滤波算法,对定子磁链、转子速度和转子位置进行精确估计并得到电磁转矩估计值,建立了基于UDUTUKF的无传感器PMSM直接转矩闭环控制系统.对比了UDUTUKF和EKF的估计误差,仿真结果表明基于UDUTUKF的无传感器PMSM直接转矩闭环系统具有快速的转速和转矩响应特性.UDUTUKF的估计误差低于EKF的估计误差,且误差收敛速度比较快. 相似文献
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基于MRAS的无速度传感器异步电机DTC系统 总被引:1,自引:0,他引:1
对一类实用的基于模型参考自适应(Model Reference Adaptive System,简称MRAS)方法的无速度传感器直接转矩控制(Direct Torgue Control,简称DTC)系统进行了研究,以提高系统的耐用性并降低成本。采用具有补偿信号的改进积分器提高了参考模型的准确性,同时利用新的转子磁链计算模型代替电流模型作为系统的可调模型,以避免难以测量转子侧参数。从而提高速度的辨识精度,在较宽的速度调节范围内改善异步电机无速度传感器控制性能。在DSP电机控制系统开发平台上实现了无速度传感器直接转矩数字控制系统。实验得到了较为理想的结果,验证了系统设计方案的可行性。 相似文献
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将变结构滑模控制的原理引入到无速度传感器直接转矩控制系统中,以改善系统的动态及稳态性能,并用仿真验证了所设计的方案的有效性。 相似文献
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Direct torque control (DTC) is known to produce quick and robust response in AC drives. However, during steady state, notable torque, flux and current pulsations occur. They are reflected in speed estimation, speed response, and also in increased acoustical noise. This paper introduces a new direct torque and flux control based on space-vector modulation (DTC-SVM) for induction motor sensorless drives. It is able to reduce the acoustical noise, the torque, flux, current, and speed pulsations during steady state. The DTC transient merits are preserved, while better quality steady-state performance is produced in sensorless implementation for a wide speed range. The flux and torque estimator is presented and an improved voltage-current model speed observer is introduced. The proposed control topologies, simulations, implementation data, and test results with DTC and DTC-SVM are given and discussed. It is concluded that the proposed control topology produces better results for steady-state operation than the classical DTC 相似文献
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关于异步电机直接力矩控制的研究 总被引:1,自引:0,他引:1
直接力矩控制是交流调速中一种新颖、有效的控制方法。首先介绍了异步电机的数学模型 ,在此基础上对直接力矩控制进行了理论分析 ,并介绍其磁通、力矩控制方法 ,给出磁通观测器和力矩观测器 ,同时也对无速度传感器的直接力矩控制作了简要介绍 相似文献
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直接转矩控制(DTC)是继矢量控制后的一种高性能交流电机控制方法。为了实现无刷直流电机控制系统的结构更简单和提高快速响应能力,文中提出了一种基于直接转矩控制的无刷直流电机控制系统实现方案;实现了无速度传感器的电机控制。实验结果表明了该方案的可行性。 相似文献
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A sensorless induction machine drive is presented, in which the principles of variable-structure control and direct torque control (DTC) are combined to ensure high-performance operation in the steady state and under transient conditions. The drive employs a new torque and flux controller, the "linear and variable-structure control", which realizes accurate and robust control in a wide speed range. Conventional DTC transient merits are preserved, while the steady-state behavior is significantly improved. The full-order state observer is a sliding-mode one, which does not require the rotor speed adaptation and provides accurate state estimation in the entire speed range. The proposed scheme is a complete variable-structure solution that allows persistent sensorless operation of the drive at very low speeds, including zero and 3 r/min, with full load. Simulations and extensive experimental results confirm the robustness, accuracy, quickness, and low-chattering operation of the drive. 相似文献
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Lixin Tang Limin Zhong Rahman M.F. Yuwen Hu 《Industry Applications, IEEE Transactions on》2003,39(6):1748-1756
A novel direct torque control (DTC) scheme for an interior permanent magnet synchronous machine (IPMSM) is proposed in this paper, which features low torque and flux ripple and almost fixed switching frequency. The torque and flux ripples have been significantly reduced compared with those of the basic DTC reported in the literature. A speed estimation scheme is integrated with the proposed DTC scheme in order to achieve a fully sensorless high-performance IPMSM drive. 相似文献