共查询到20条相似文献,搜索用时 15 毫秒
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Mirafzal B. Skibinski G.L. Tallam R.M. Schlegel D.W. Lukaszewski R.A. 《Industry Applications, IEEE Transactions on》2007,43(5):1233-1246
A three-phase induction motor model that depicts the motor behavior over a wide range of frequencies from 10 Hz to 10 MHz is presented in this paper. The model is universal in the sense that common-mode, differential-mode, and bearing circuit models are combined into one three-phase equivalent circuit model. The proposed model is basically an extension of the low-frequency IEEE Standard 112 circuit model. The proposed model was experimentally simulated and verified with results presented. 相似文献
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A multiloop feedback control system supplemented by a complementary controller is used to improve the drive performance of an AC induction servo motor and reduce sensitivity to parameter variations, nonlinear effects, and load disturbances. Based on the principle of field-oriented vector control, a software-based current-decoupled controller has been proposed. A simplified model of the current-decoupled induction motor has been used for the design and simulation of the proposed robust controller. Experimental results based on multimicroprocessor implementation are presented to illustrate improved response and reduced sensitivity 相似文献
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Chang-Huan Liu Chen-Chain Hwu Ying-Fang Feng 《Industry Applications, IEEE Transactions on》1989,25(4):588-597
A new approach to model the current-source-inverter-fed induction motor drive is presented. The mathematical model takes into account the rectifier, inverter, and induction motor dynamics and is established in the stationary reference frame. For controlling the drive speed, a modified indirect field-oriented control is proposed. To counter the effects of torque pulsations at very low speeds and rotor resistance variation, a slip compensation loop is included in the control law formulation. A microprocessor-based prototype system is also implemented, providing full digital control of the drive speed. Both computer simulation and experimental results are presented 相似文献
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《Electric Power Systems Research》1995,34(3):205-210
The paper describes the development of a computer model to simulate an induction motor including the effects of saturation on leakage and magnetizing inductance. The machine dynamics are presented by a set of nonlinear time-varying differential equations. The machine saturable inductances are modeled by closed-form nonlinear functions. A 1100 W induction motor is tested and the machine parameters are estimated. The identified model is simulated using the fourth-order Runge-Kutta method for both saturable and unsaturable inductances. The model is validated by comparing a sample simulated result with the dynamic performance measured in the laboratory. 相似文献
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Reigosa D. D. Garcia P. Briz F. Raca D. Lorenz R. D. 《Industry Applications, IEEE Transactions on》2010,46(1):139-149
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笼型感应电动机转子断条和开裂的故障诊断和在线监测 总被引:3,自引:0,他引:3
分析了笼型感应电动机转子故障时导条断条和端环断裂的物理模型 ,给出了电动机的定转子绕组的参数计算表达式 ,建立了数学模型 ,从而导出转子故障时的电流和频谱分析。本文分析了电动机在故障时 ,在dqn任意速坐标系中 ,电动机定子电流的轨迹 ,为电动机的故障诊断和在线监测提出了一种新的方法 ,较以往的电流监测方法更有利于克服边频带的影响。 相似文献
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提出了一种新颖的用于异步电机控制的滑模速度观测器。该观测器具有结构简单、新颖、易于实现的特点,在无速度传感器的电机控制系统中,能有效地消除运用滑模观测器所固有的高频速度抖动现象。该观测器利用电压和电流信号构成观测器估计电机转速、转子磁通量以及转子磁通的位置,其理论的正确性可由李雅普诺夫理论证明。将其应用于采用磁场定向矢量控制方法的无速度传感器的感应电机控制系统,实验证明,在整个调速范围内都取得了很好的效果,系统具有很好的稳态精度和动态响应性能。 相似文献
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电压稳定分析中异步电动机动态负荷建模探讨 总被引:1,自引:0,他引:1
探讨电压稳定分析中异步电动机(IM)负荷的建模问题。分析一般的动态负荷模型(GDLM)不能捕捉IM动态行为的机理。分别以IM的滑差模型和滑差磁链模型为基础,严格地导出了适用于电压稳定分析的简化一阶(SIM)和详细三阶(DIM)动态负荷模型,同时还说明了SIM和DIM模型实质上是对GDLM模型进行了不同程度的改进。对SIM和DIM模型在暂态电压稳定分析和静态电压稳定分析中的适用性进行分析比较,仿真结果表明:SIM和DIM分别以不同的准确度适用于不同场合的电压稳定分析。 相似文献
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In order to predict conducted electromagnetic interference in inverter-motor drive systems, high-frequency (HF) motor models are requested and the involved parameters have to be available. In previous studies, the authors have presented an accurate HF model for induction motors and they have defined the procedures to identify the model parameters. In this paper, these results are extended to several types and sizes of industrial ac motors such as induction, synchronous reluctance (without interior permanent magnets), and brushless motors. The model parameter-identification procedure has been improved, and it is based on a least-squares data fitting applied to the measured magnitude and phase-frequency-response curves of the phase-to-ground and the phase-to-neutral impedances. The aim of this paper is to provide quick indications to select the suitable values of the HF model parameters, with reference to the size and type of the ac motor, to evaluate the HF voltage and current components in inverted-fed ac motor systems 相似文献
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This paper presents a new technique to detect the slip angular frequency in induction motor drives with indirect field-oriented control (IFOC). Slip frequency is calculated by processing the effects exerted by an additional high-frequency signal on the zero-sequence stator voltage. By measuring such a zero-sequence voltage, it is possible to evaluate the air-gap flux and detect the slip frequency in order to implement an IFOC algorithm. According to the proposed approach, rotor time constant errors are not influent as in conventional field-oriented control schemes, thus, complex tuning or compensation techniques are not required. Simulations and experimental tests are performed to evaluate the consistency of the proposed approach. 相似文献
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针对当前直线电机应用中提升效率的需求和其效率优化策略中损耗模型准确性和复杂度难以取舍的问题, 对直线感应电机提出了一种考虑动态边端效应和漏感影响,同时复杂度适中的新型最小损耗策略。通过计算最优磁 链,重新平衡 d-q轴电流。文章首先基于改进的双三相直线感应电机数学模型推导出一种新型稳态损耗模型,并 由此模型设计出完整的最小损耗控制策略。对于 3kW短初级六相直线感应电机,仿真验证此策略较传统策略,在 0.2p.u.轻载、5m/s时减少约 250W(48%)损耗,同时推力波动显著减小。最后全面对比了各种工况下此处新策略 的损耗降低效果。 相似文献
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根据异步电动机的理论,得到两相静止坐标系下的异步电动机的数学模型,在此基础上利用SABER仿真软件建立了电流—电压和磁链—电压两种仿真模型。通过对模型的仿真,表明其性能与真实的异步电动机的性能一致。 相似文献
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A calculation procedure for wavelength constants and interturn overvoltages in a multiturn random winding of an induction motor supplied from a frequency converter is described. A mathematical model and modeling results for wave processes in sections (turns) of the multiturn random winding of the induction motor with a cage rotor are presented. 相似文献
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A rotor deep bar effect compensation circuit for field-oriented controllers is derived from the transient equations of a double-cage induction machine. Torque and flux are decoupled with respect to the airgap flux. Accurate tuning of the field-oriented controller is possible both for steady-state and high-frequency conditions in the rotor. Consequently, an extended static stability region and improved torque dynamics are obtained with the deep bar effect compensated induction motor drive 相似文献
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Ionel D.M. Popescu M. Dellinger S.J. Miller T.J.E. Heideman R.J. McGilp M.I. 《Industry Applications, IEEE Transactions on》2006,42(3):658-667
A model of core losses, in which the hysteresis coefficients are variable with the frequency and induction (flux density) and the eddy-current and excess loss coefficients are variable only with the induction, is proposed. A procedure for identifying the model coefficients from multifrequency Epstein tests is described, and examples are provided for three typical grades of non-grain-oriented laminated steel suitable for electric motor manufacturing. Over a wide range of frequencies between 20-400 Hz and inductions from 0.05 to 2 T, the new model yielded much lower errors for the specific core losses than conventional models. The applicability of the model for electric machine analysis is also discussed, and examples from an interior permanent-magnet and an induction motor are included. 相似文献