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本文以异步电动机的转差频率矢量控制调速系统为研究目标,介绍矢量控制的思想和转差频率控制原理,并通过Simulink建立仿真模型,观测异步电动机起动和突加载时的输出转速、转矩、定转子磁链等参数,验证转差频率矢量控制策略的仿真效果,分析了异步电动机的动态性能。仿真结果表明转差频率矢量控制策略具有良好动态性能。 相似文献
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针对直线感应电动机多变量、非线性、强耦合的控制对象特点,将模糊控制策略应用到转差频率型直线感应电动机矢量控制系统中。采用磁链开环、速度和电流模糊控制的双闭环控制系统,速度和电流调节器采用自调整模糊控制器。对电机在起动和突加负载情况下进行了仿真,结果表明:采用模糊控制双闭环实现的直线电机转差频率型矢量控制系统比PI控制系统具有更强的鲁棒性,系统的稳态性能和动态性能大大提高。 相似文献
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模糊控制器在无速度传感器矢量控制变频调速系统中的应用 总被引:3,自引:0,他引:3
本文将模糊控制引入无速度传感器的电流型转差矢量控制交流传动系统中,给出了带自调整因子的模糊控制器。文中对转差矢量控制算法与速度观测器进行了研究,给出了控制系统的结构,并在此基础上进行了仿真研究。对模糊控制与PI控制作对比研究的结果表明,模糊控制器较常规PI控制器对参数变化与负载扰动不敏感,可使系统具有更强的鲁棒性。 相似文献
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异步电动机的矢量控制和解耦控制 总被引:3,自引:0,他引:3
本文讨论有关矢量控制和解耦控制的两个理论问题:(1)矢量控制是否能耦,它与耦控制间的关系如何?(2)如果说矢量控制能解耦,为什么电流型转差频率矢量控制系统轻载时动特性变差? 相似文献
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通过分析异步电动机转差频率矢量控制的特点,阐述了异步电动机转差频率和同步电动机转矩角之间的本质联系.类比于异步电动机转差频率矢量控制原理,提出了同步电动机转矩角矢量控制原理.该原理适用于控制精度要求不太高的同步电动机的控制系统,具有较高的性能价格比. 相似文献
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基于Matlab/Simulink的异步电机矢量控制系统仿真 总被引:1,自引:0,他引:1
在ABC坐标系的基础上,分析了异步电机的数学模型.利用Matlab/Simulink给出异步电机的一个通用而简单的动态仿真模型,并把该模型应用于异步电机的矢量控制系统,建立了转子磁链定向的异步电机矢量控制系统仿真模型.使用时只需调用该模型并置入相应的电动机参数即可,证明该模型具有快捷、灵活、方便、直观等一系列优点.通过... 相似文献
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This paper presents a stability analysis of a speed sensorless vector control (SSVC) system of an induction motor. The stability analysis takes into account the effects of three current control loops. The poles and zeros of the transfer functions for the rotor speed are calculated to investigate the influences of controller parameters and motor parameters. The theoretically derived step responses are compared with the experimental results. Also, the Bode diagrams of the transfer functions for the torque producing current are calculated. The settling time of the step responses of the rotor speed for the various designs of the current regulator (CR) is studied. This paper discusses the suitability of different CR methods for the SSVC system of an induction motor. 相似文献
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内模控制在电流调节器中的应用 总被引:2,自引:1,他引:1
在永磁同步电机(PMSM)的矢量控制中,电机的调速范围很宽时,电阻、电抗等参数对d、q轴电流的控制产生较大的误差,从而影响控制精度和动态响应速度。基于磁场定向的控制原理,提出了永磁同步电机电流调节器的内模控制(IMC)设计。用矩阵奇异值分析了IMC电流调节器的鲁棒性,并将其应用于永磁同步电机转子磁场定向的矢量控制中。对电流调节器的传递函数进行了仿真并用数字信号处理器(DSP)实现电机矢量控制的运行实验,实验表明,用IMC电流调节器实现的电机调速,能够获得良好的跟踪性能和较高的稳态精度。 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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采用改进的扇合矢量变换法,从三相不对称且含谐波的系统中提取基波的负序电压及电流。介绍了无附加滞后的扇合矢量变换法,以TMS320F2812芯片为控制系统的核心进行了有源电力滤波器硬件设计,给出了软件设计的主程序流程图。运用DSP实现扇合矢量变换法,算法简单,有很好的应用前景。 相似文献
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运用于交流电机矢量控制的遗传算法参数辨识 总被引:1,自引:0,他引:1
针对传统的交流电机参数获取方法存在一定的缺陷,导致矢量控制系统不能实时准确地获取电机的参数的缺点,提出了利用遗传算法辨识电机参数的无速度传感器异步电机矢量控制系统。搭建了实验系统,并进行了相关实验,结果表明该矢量控制系统在启动、调速、稳态运行时具有良好的静、动态性能,表明将遗传算法参数辨识运用到交流电机矢量控制系统能大大提升系统性能。 相似文献
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Abstract—This article presents the application of support vector machines to adaptive power system stabilizer design in a multi-machine power system based on the harmony search algorithm. Data from a multi-machine power system are the input features of the support vector machines. Support vector machine parameters and power system features are simultaneously optimized by harmony search based on the k-fold cross-validation technique. The proposed algorithm is trained by the optimal support vector machine parameters and optimal power system features. Power system stabilizer parameters produced by the proposed algorithm can be adapted by various operating conditions when the power system operates either inside or outside the training ranges. Simulation studies in the IEEJ Western Japan ten-machine power system demonstrate that the proposed algorithm is far superior to conventional power system stabilizers with fixed parameters and those designed by a robust coupled vibration model under various operating conditions and severe disturbances. 相似文献