共查询到20条相似文献,搜索用时 0 毫秒
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Bolognani S. Tubiana L. Zigliotto M. 《Industry Applications, IEEE Transactions on》2003,39(3):768-775
This paper deals with the experimental realization of a sensorless interior permanent-magnet synchronous motor drive. The motor has been specifically designed to get a wide flux-weakening region, to minimize the drive power rating in spite of a wide speed range. Position and angular speed of the rotor are obtained through an extended Kalman filter. The estimation algorithm requires neither the knowledge of the mechanical parameters, nor the initial rotor position. In the paper, particular emphasis is placed on control algorithms, which are complicated by the motor anisotropy and which have been specifically studied to enhance the overall system performance. 相似文献
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A high-performance, fully operational four-quadrant control scheme for the interior permanent magnet (PM) synchronous machine is described. The machine operates smoothly with full performance in the constant-torque region as well as in the flux-weakening constant-power region in both directions of motion. The transition between the constant-torque region and the constant-power region is very smooth at all conditions of operation. Control in the constant-torque region is based on the vector stator flux, while constant-power region control is implemented through the feedforward vector rotator. The control system is digitally implemented using a distributed microcomputer system, and all of the essential feedback signals such as torque, flux, etc. are estimated with precision. A 70 hp drive system using a neodymium-iron-boron (NeFeB) PM machine and transistor pulse width modulation inverter was designed and extensively tested in the laboratory on a dynamometer, and performance was found to be excellent 相似文献
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研究了一种基于开关函数概念的逆变器仿真模型,在MATLAB/SIMULINK环境下,利用工具箱内部的基本模块建立了逆变器开关元件短路、开路及同桥臂两开关元件同时开路状态下的仿真模块.利用电动机的数学模型,编制了电动机s函数.针对不同故障模式,只需改变开关函数模块即可方便实现逆变器电机驱动系统的不同状态仿真.研究了不同故障模式下的电机相电流和转矩波形,仿真结果表明电机相电流可以作为故障特征实现逆变器故障检测与诊断. 相似文献
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A quasi-resonant inverter-fed induction motor operated under direct torque control (DTC) scheme is modeled and analyzed with SABER simulator. The dc link voltage is clamped to source voltage. All the devices in the resonant link and inverter except auxiliary switch in the resonant link are operated soft under zero-voltage switching (ZVS). The auxiliary switch is turned on under zero-current switching (ZCS), but turned off hard. This scheme has been implemented on a laboratory-sized experimental setup. A comparison of simulation and experimental results under identical operating conditions were presented. 相似文献
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针对三相PWM驱动电机系统难以建立用于预测干扰的准确的高频干扰源数学模型这一问题,提出将整流桥和逆变器两个干扰源分开进行研究的方法.采用傅里叶变换法建立整流桥的干扰源模型,采用双重傅里叶积分法建立逆变桥产生的共模和差模干扰的干扰源数学模型,把PWM载波和基波用两个独立周期的时变函数来描述,将其共同作用的函数作为被积函数,并详细推导了正弦脉宽调制技术的内外积分线的确定过程.最后通过实验结果和仿真结果的比较,验证了所建立整流桥和逆变器的干扰源模型的正确性,因此该数学模型可作为三相PWM驱动电机系统的传导干扰预测的干扰激励源. 相似文献
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A permanent magnet synchronous-motor drive that uses and adaptive control to find the maximum-efficiency operating point at any speed and load is demonstrated. Active damping is provided by modulating the inverter frequency in proportion to the perturbations in the average inverter DC link current. All principal control functions, including efficiency optimization and frequency modulation, are performed by a real-time digital control algorithm, using only the filtered inverter DC link current as a feedback signal from the inverter. Laboratory tests and computer simulations demonstrate the performance of the efficiency-optimizing control and the frequency-modulation feedback loop 相似文献
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Miller T.J.E. Hutton A. Cossar C. Staton D.A. 《Industry Applications, IEEE Transactions on》1991,27(4):741-749
A segmental-rotor synchronous reluctance motor is used in a variable-speed drive with current-regulated pulse-width-modulated (PWM) control. The low-speed torque capability is compared with that of an induction motor, a switched reluctance motor, and a brushless DC PM motor of identical size and copper weight. A particular point of interest is the comparison of motors of different types, all with essentially the same frame size and tested under identical conditions. The results suggest that many of the desirable properties of the switched reluctance motor can be realized with the synchronous reluctance motor but with using standard AC motor and control components. The torque capability is lower, but so is the noise level 相似文献
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Morimoto S. Hatanaka K. Tong Y. Takeda Y. Hirasa T. 《Industry Applications, IEEE Transactions on》1993,29(2):338-343
Permanent magnet (PM) synchronous motors fed by PWM inverters are considered. PM motors sometimes have a saliency, in which the q -axis inductance is larger than the d -axis inductance. A high-performance servomotor drive system for a salient-pole PM motor is described. An armature current vector is actively controlled according to load conditions in order to use a reluctance torque effectively, and, as a result, a large torque can be produced. The control algorithm for the armature current vector is described, taking the demagnetization of the PM and the magnetic saturation into account. Characteristics such as torque, power factor, efficiency, power capability, transient responses, etc. are examined in detail by computer simulations and experimentally 相似文献
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von Jouanne A. Rendusara D.A. Enjeti P.N. Gray J.W. 《Industry Applications, IEEE Transactions on》1996,32(4):919-926
In this paper, filtering techniques are investigated to reduce the motor terminal overvoltage, ringing, and dv/dt in inverter-fed AC motor drive systems where long leads are required. Analysis is presented to show that the distributed LC of a cable and the pulse-width modulated (PWM) inverter switching action lead to motor terminal voltage reflections and ringing that stress the turn insulation and contribute to bearing currents. First- and second-order shunt filter designs are analyzed and compared. Detailed design equations to match the filter impedance to the cable surge impedance and to determine the filter component values are presented. It is demonstrated that a first-order shunt filter connected at the motor terminals significantly reduces the overvoltage stress and ringing, and also lowers the dv/dt of the PWM switching pulse. Simulation and experimental results are presented to verify the proposed filter designs for 50-ft and 100-ft cable lengths for 460-V PWM insulated gate bipolar transistor (IGBT) AC motor drive systems 相似文献
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介绍了9300系列伺服控制器的CAN总线和数字频率输入/输出在湿法毡生产线同步控制系统中的应用,详尽地分析了生产线7台变频电机分部传动的实现方法和工作原理. 相似文献
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Dr.-Ing. D. Nafpaktitis Prof. Dr.-Ing. D. Naunin 《Electrical Engineering (Archiv fur Elektrotechnik)》1986,69(2):143-148
Contents An inverter with thyristors and antiparallel diodes (voltage valves) connected to a synchronous machine offers the possibility of operating the motor at higher speeds than the so-called current-converter motor — a synchronous motor fed by an inverter with thyristors (current valves) — is able to do. The disadvantage of a more complex run-up performance can be overcome by a control strategy which takes care of the additionally induced free-wheeling diode and machine currents. These currents depend on machine parameters and especially on the control angle as is explained. Digital simulation and results from an experimental drive system verify the calculated characteristics.
Steuerstrategie für den Anlauf einer stromrichtergespeisten Synchronmaschine mit Spannungsventilen
Übersicht Ein Umrichter mit Thyristoren und antiparallelen Dioden (Spannungsventilen), der einer Synchronmaschine vorgeschaltet ist, eröffnet die Möglichkeit, die Synchronmaschine mit höheren Drehzahlen als beim Stromrichtermotor, der nur Thyristoren (Stromventile) enthält, zu betreiben. Der Nachteil des nicht so einfachen Anlaufs der Maschine kann durch eine geeignete Steuerstrategie, die die zusätzlich induzierten Diodenfreilaufströme und Maschinenfreilaufströme berücksichtigt, kompensiert werden. Diese Ströme hängen von Maschinenparametern und insbesondere vom Steuerwinkel ab, wie im einzelnen erläutert wird. Eine digitale Simulation und Resultate aus einem experimentellen Antriebssystem bestätigen die theoretisch berechneten Kurven.相似文献
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Bianchi N. Bolognani S. Zigliotto M. 《Industry Applications, IEEE Transactions on》2001,37(5):1348-1355
In this paper, the design of a full electrical system for an electrical scooter is presented. The paper explains the design choices that have been made to satisfy the typical main requirements for an electrical vehicle. According to them, an interior permanent-magnet synchronous motor has been incorporated in a drive able to control the motor both in the constant-torque (constant-flux) and in the constant-volt-ampere (flux-weakening) regions. Experimental results carried out on a system prototype are also included in the paper 相似文献
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A six-pulse noncirculating-current cycloconverter-fed synchronous motor with stator-flux-oriented vector control for high-power and low-speed applications is discussed here. Vector control is achieved by stator flux estimation through a novel closed-loop reduced-order observer exhibiting stable speed regulation. Variable displacement factor operation is incorporated to keep both the system current continuous and the system utilization optimum. A simple method is used in designing the controller for armature current regulation with good performance. A generalized digital simulation of the drive system is made, and the simulation results are validated by a low-cost laboratory implementation of the drive with a 386DX PC-based system with 80387 floating point support 相似文献
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