共查询到20条相似文献,搜索用时 140 毫秒
1.
2.
介绍了无位置传感器无刷直流电动机系统的控制原理,讨论了该系统控制的实现方法,最后对基于数字信号处理器(DSP)芯片TIMS320LF2407A的无位置传感器无刷直流电动机控制系统的软、硬件实现作了详细论述. 相似文献
3.
4.
无位置传感器永磁无刷直流电动机换相策略研究 总被引:2,自引:0,他引:2
研究了无位置传感器永磁无刷直流电动机控制系统的换相策略 ,给出了基于PIC18F452单片机和可编程逻辑器件ATF1504AS的软、硬件新方案 ,实现了永磁无刷直流电动机的无位置传感器运行 相似文献
5.
6.
7.
8.
端电压比较法直接寻找无刷直流电动机换相点及其斩波调速 总被引:4,自引:0,他引:4
提供了一种利用端电压比较结合软件算法直接寻找直流无刷无位置传感器电动机换相点的方案,解决了直流无刷无位置传感器电动机控制的关键问题-转子位置检测,并以单片机PIC16C72为核心构成先进的数字控制系统,实现了软件斩波调速。 相似文献
9.
飞轮用无位置传感器无刷直流电动机系统设计 总被引:1,自引:1,他引:1
介绍了无位置传感器无刷直流电动机(BLDCM)及其控制系统的设计;给出了样机的实验数据,介绍了采用无槽绕组来降低电动机单边磁拉力以及控制系统调试中应注意的问题。 相似文献
10.
11.
ATSUSHI OKUYAMA 《Electrical Engineering in Japan》2016,195(1):53-62
A control method for improving tracking performance with respect to a reference trajectory has been developed. The proposed control system has an inner/outer control structure. The inner control system is the existing control system based on a conventional PID controller, which is designed in advance and is independent of the outer control system. In order to improve tracking performance, the outer control system is designed based on optimal preview control theory and is added to the outside of the inner control system. A polynomial trajectory is used as the reference trajectory and is fed to the outer control system. The reference trajectory is modified online to minimize tracking error. The modified reference trajectory is derived as a control input signal from the outer control system and is fed to the inner control system. The effectiveness of the proposed control method is confirmed using numerical simulations in a benchmark problem for hard disk drives (HDDs). 相似文献
12.
介绍一种实用的中储式球磨机制粉优化控制系统,此系统分为稳态优化控制和制粉系统启停优化控制。稳态控制采用三层控制方式,将控制分为模糊回路控制层、解耦系数控制层和目标优化控制层。系统启停控制将过程控制、调节控制、协调控制相结合,实现优化复杂系统过程控制。系统的实际实施效果表明,该优化控制系统实现了制粉系统的全自动控制,运行稳定可靠,节能效果显著,可自动适用于各种不同煤质。 相似文献
13.
The present status and future problems of hierarchical power system control are reviewed. Special emphasis is placed on the hierarchical structure of power system control. Power system control has been developed in close association with the progress of the power system itself. The hierarchical structure of the control system is closely connected, therefore, with that of the power system, and this structural relationship is reviewed. Motivations of using a hierarchical structure of power system control are reviewed in terms of power system control and planning. Required performances of computers installed at respective levels of hierarchical control system are discussed. Benefits resulting from the introduction of such control systems are summarized, and future problems associated with the further development of hierarchical power system control are considered. 相似文献
14.
15.
16.
Kei Ohtsuka Makoto Nishida Yasuo Morioka Kenji Yachida 《Electrical Engineering in Japan》1996,116(5):61-74
A decentralized control system is studied for stabilizing multimachine power systems. A longitudinal power system with three areas, each having one machine, is considered in this study. A decentralized control design method is proposed, which is based on the optimal regulator theory. First a centralized control system is designed without any consideration on whether state variables are all available or not. Second a pseudo-decentralized control system is designed by omitting control gains corresponding to state variables which give hardly any effects on the power system stability. It is found that only one variable of phase angle of each machine is absolutely necessary for the pseudo-decentralized control system. This leads to an idea based on power system engineering, that is to say, new variables of tieline power flow are introduced in the decentralized control system design to substitute for the phase angle of each machine. Thus a decentralized control system for power system stability can be designed using the new variables of tieline power flow. It is demonstrated from simulation studies that the decentralized control system improves even longitudinal power system stability as well as the centralized control system. 相似文献
17.
介绍了发电机组锅炉和汽轮机的集散型控制系统(DCS)设计。对煤气燃料控制、送风量控制、引风控制、给水控制、除氧器控制、过热蒸汽温度控制、高压加热器出水温度调节、凝汽器热井水位调节等系统可能出现的问题给出了相应的解决方法,并对系统设置相应的联锁保护。所得出的DCS控制配置方案冗余配置,保障了系统的可靠运行。对所有常规仪表只保留了手操器及几块关键参数的显示表,所有控制、显示、联锁功能全部由系统完成。 相似文献
18.
PFC-PID串级控制在主汽温控制系统中的应用研究 总被引:18,自引:7,他引:18
针对火电厂主汽温控制系统大惯性,大迟延,慢时变以及扰动因素较多,常规串级PID控制难以取得满意的调节效果的特点,该文介绍并分析了预测函数控制(PFC)的基本原理和特点,给出了一阶加纯滞后系统的预测函数控制的具体算法,并将PFC和PID控制相结合,提出了PFC-PID串级主汽温控制策略,系统的内回路采用PID控制,内回路和主调节区对象构成PFC的广义被控对象,对广义被控对象进行拟合简化得到一阶加纯滞后对象,作为PFC的预测模型,算法简单;预测模型失配时,系统仍具有良好的控制品质,易于工程实现,具有较高实际应用价值,大量的仿真实验表明,采用PFC-PID串级控制策略的主汽温控制系统的动态品质明显优于采用PID串级控制策略的系统,具有较强的鲁棒性和抗干扰能力。 相似文献
19.
介绍了高压直流输电控制系统的组成、基本控制功能及控制方式。直流极控制系统是换流站控制系统的核心,主要功能是通过对整流侧和逆变侧触发角的调节实现系统要求的输送功率或输送电流。直流输电和交流输电技术的显著不同在于输电过程对控制保护系统的依赖性。直流输电是建立在阀导通和截止控制上的一种电能传输方式。 相似文献
20.
根据Rossler系统的动力学方程,数值仿真了系统随自身参数变化的全局分岔图,分析了参数变化引起系统动力学行为的变化。针对系统混沌状态,分别用自适应控制法和控制法两种方法对系统进行控制,仿真结果显示:两种控制法均能将系统控制在稳定的周期轨道。对比了两种控制法对系统控制的结果,在自适应控制中,随着控制参数逐步减小,系统由单周期运动经倍化分岔为双周期运动,再经倍化分岔序列最终通向混沌,动力学行为规则,对应控制参数选择区域连续;在控制中,系统由混沌状态转变为三周期运动,随着控制参数逐步增大,周期运动发生倍化分岔,再经倍化分岔序列通向混沌,系统动力学行为丰富,对应控制参数选择区域范围明确。为Rossler系统的动力学行为研究和混沌控制提供了理论支持,为Rossler系统在工程领域的应用及控制提供了参数选择区域,为其它系统的混沌控制及动力学行为研究提供了经验和方法。 相似文献