共查询到20条相似文献,搜索用时 156 毫秒
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以交流电机调速控制为研究对象,设计了一种基于复杂可编程逻辑器件的多台交流电机自控式变频调速系统。介绍了该系统的调速方法和转向控制,并在此基础上实现了两台交流电机的变频调速自动控制。通过空载条件下不同转速的调速试验表明该系统是可行的。 相似文献
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以交流电机调速控制为研究对象,设计了一种基于复杂可编程逻辑器件的多台交流电机自控式变频调速系统。介绍了该系统的调速方法和转向控制,并在此基础上实现了两台交流电机的变频调速自动控制。通过空载条件下不同转速的调速试验表明该系统是可行的。 相似文献
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本文研究了用于电动车辆的小功率开关磁阻电机调速(SRD)系统的设计,并在转速环设计中运用了自适应模糊PID控制理论。以一台三相6/4极结构的SRM为控制对象,进行了试验。试验结果表明,本系统具有良好的调速性能和控制特性。 相似文献
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针对原动机及其调速系统的实际特点,采用通用数学模型,以微机为核心,利用可控整流技术和直流电机实现了原动机及其调速系统的动态模拟.该模拟系统的直流电机电源采用以集成触发模块为核心的移相触发技术实现控制,简化了系统.设计的红外测速系统容易安装,简单可靠.动模试验结果令人满意. 相似文献
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基于变频技术的空气压缩机调速系统设计与能效分析 总被引:3,自引:0,他引:3
空气压缩机目前在工矿企业生产中得到广泛的应用,进行了空压机调速系统传统控制方式下的能耗分析,阐述了变频调速控制原理,设计了一个空压机变频调速系统实例,给出了能效分析.实践证明,空压机调速系统采用变频调速不仅保持了压力稳定,而且节能效果明显. 相似文献
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感应电动机交-交变频调速系统的双内模控制研究 总被引:4,自引:0,他引:4
基于先进的内模控制理论,提出了一种双内模控制结构,将内模控制拓展应用到多环控制的感应电动机交-交变频调速系统的外环;仿照调速系统调节器的工程设计方法,提出了基于内模控制原理的调速系统调节器设计原则,并进行了调节器设计.所设计的电流调节器为PI结构、磁链和转速调节器为PI或PID结构,但都只有一个可调参数,结构简单,参数调整方便.仿真实验表明,采用内模控制后,系统的输出动态性能优于工程设计方法设计的动态性能. 相似文献
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Mineo Tsuji Hanqiang Li Katsuhiro Izumi Eiji Yamada 《Electrical Engineering in Japan》1997,119(4):66-76
Vector control of induction motors is widely used for industrial applications. On-line parameter identification and speed sensorless control are being studied actively. A representative method for these problems is the application of an adaptive full-order observer. The rotor flux for vector control is estimated by a full-order observer and machine parameters, or the rotor speed is determined by an adaptive algorithm. In this paper, a new vector control scheme with parameter identification is proposed. This method is based on the adaptive full-order observer. However, the observed currents which are usually estimated in the voltage model are considered as command currents and the voltage model is used for the current controller. As a result, the proposed system is simpler than the conventional adaptive full-order observer system. Since the proposed system is composed of an induction motor model in a synchronously rotating reference frame, the well-known slip frequency control block is contained. The arrangement of the poles which are related to the torque transfer function is discussed. A linear model is derived taking into account the effects of the change of the stator and rotor resistances. The trajectories of poles and zeros of the torque transfer function are computed and discussed for various system parameters. Identification of stator and rotor resistances is confirmed by simulation using a nonlinear system model. The proposed idea is applied to a speed sensorless system; this system has a similar configuration to those of existing systems under some assumptions. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 119(4): 66–76, 1997 相似文献
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一种新型双凸极单相永磁电动机--工作原理与参数计算 总被引:16,自引:13,他引:3
介绍了1种双凸极单相永磁电动机.电机有4个定子极和6个转子极,转子上无绕组及永磁体,定子上放置绕组和永磁体.定子极采用阶梯形结构,使电机可以起动.电机结构控制简单,可双向运转,适合于调速控制系统.研究了该电机的工作原理及其参数的计算,为电机的控制及系统仿真奠定了基础并提供了依据. 相似文献
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一种新型双凸极单相永磁电动机的工作原理与参数计算 总被引:8,自引:6,他引:2
介绍了1种双凸极单相永磁电动机。电机有4个定子极和6个转子极,转子上无绕组及永磁体,定子上放置绕组和永磁体。定子极采用阶梯形结构,使电机可以起动。电机结构控制简单,可双向运转,适合于调速控制系统。研究了该电机的工作原理及其参数的计算,为电机的控制及系统仿真奠定了基础并提供了依据。 相似文献
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《IEEJ Transactions on Electrical and Electronic Engineering》2017,12(Z2):S101-S112
In the speed control of an interior permanent magnet synchronous motor (IPMSM), for stability reasons, the closed‐loop pole positions should be on the left‐hand side of the S‐plane, and for fast response requirements these poles should have a small time constant. Unfortunately, the motor poles have a very long time constant, which makes the system response very slow. To solve this problem, the zeros of PI controllers are used to compensate the motor poles. As the motor operates, the temperature increases, which changes the parameters of the motor and, accordingly, the motor poles change their position so the PI controller cannot compensate these poles. To solve this problem, many parameter estimation algorithms have been used to detect new parameter values and adapt the PI controller gains so that to compensate the motor poles continually. These parameter estimation algorithms complicate and add cost to the system. This paper demonstrates that, for a temperature up to 70 °C, the system is capable of giving fast response and stable operation by using a good design of the PI controller regardless of the parameter changes. 相似文献
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K.R. Padiyar S.S. Prabhu M.A. Pai K. Gomathi 《International Journal of Electrical Power & Energy Systems》1980,2(3):140-146
Large interconnected power systems are provided with power system stabilizers to damp out the low frequency rotor oscillations introduced by fast and high gain excitation systems. Stabilizing signals from rotor speed, frequency and accelaration are commonly used. Classical control techniques have been widely used in the design of power system stabilizers although modern control theory has been applied recently.Three methods for stabilizer design using pole assignment technique with output feedback are presented. The first method uses modal control techniques with a least-square minimization method. The second and third involve static optimization. An algorithm for pole assignment by Sirisena and Choi is used in the second method, while a new algorithm for placing the closed loop poles inside a sector is used in the third method. Numerical examples are given to illustrate the methods. 相似文献
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本文对多变量系统给出了一种具有极点配置的广义最小方差控制器。它能够消除稳态偏差且有扰可测干扰能力,可在线亦可离线配置闭环极点,可用于非最小相位系统的控制。 相似文献