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Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370)最新文献

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Switching characteristics of NPT- and PT-IGBTs under zero-voltage switching conditions 零电压开关条件下NPT-和pt - igbt的开关特性
B. Song, Huibin Zhu, J. Lai, A. Hefner
In this paper, switching characteristics of nonpunch through (NPT) and punch through (PT) insulated gate bipolar transistors (IGBTs) are evaluated under zero-voltage switching (ZVS) conditions. Through the physics-based modeling and experiments, the interaction between the external circuit and the physical IGBT internal model under ZVS operation is evaluated. The effects of the external snubber capacitor on the turn-off tail current are modeled and analyzed with the Saber circuit simulator. The turn-on switching characteristics are evaluated for the study of switching losses. This study provides guidelines for designing IGBTs that are suitable for soft switching and for selection of appropriate snubbing capacitors in soft-switching inverter and converter applications.
本文研究了零电压开关(ZVS)条件下非穿孔通(NPT)和穿孔通(PT)绝缘栅双极晶体管(igbt)的开关特性。通过基于物理的建模和实验,评估了ZVS操作下外电路与物理IGBT内部模型之间的相互作用。利用Saber电路模拟器对外部缓冲电容对关断尾电流的影响进行了建模和分析。为了研究开关损耗,对导通开关特性进行了评估。本研究为设计适合软开关的igbt以及在软开关逆变器和变换器应用中选择适当的缓冲电容器提供了指导。
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引用次数: 19
A novel electric machine employing torque magnification and flux concentration effects 一种利用转矩放大和磁通集中效应的新型电机
Dinyu Qin, R. Qu, T. Lipo
An evolving family of electric machines using the torque magnification (TM) principle has attracted increasing interest in recent years. In this paper the TM principle is described following the introduction of the specific torque density concept. A TM machine with flux concentration effect is presented, and its working principle explained. The design considerations of the machine, which are common to any TM machine, are studied in detail. Test results taken on a hardware prototype machine prove the concept and make clear that the machine's cost-effectiveness.
近年来,利用转矩放大(TM)原理的一系列不断发展的电机引起了人们越来越多的兴趣。本文在引入比转矩密度概念的基础上,阐述了TM原理。介绍了一种具有助焊剂浓缩效应的TM机床,并对其工作原理进行了说明。详细研究了机床的设计注意事项,这是任何TM机床所共有的。在硬件样机上进行的测试结果证明了这一概念,并明确了该机器的成本效益。
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引用次数: 19
Extended-range linear magnetostrictive motor with double-sided three-phase stators 带双面三相定子的增量程线性磁致伸缩电动机
Won-jong Kim, J. Goldie, M. Gerver, J. Kiley, John R. Swenbeck
We have developed a novel extended-range linear magnetostrictive motor using the peristaltic motion of a laminated Terfenol-D (Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/) element. This element migrates in the opposite direction of the traveling magnetic field generated by conventional three-phase armature commutation. The actuator mechanical design is in an open structure in order to allow easy assembly and access to internal actuator components. Eight sets of Belleville washers guarantee uniform squeeze pre-load in spite of wear, thermal expansion, or motion of the moving element. We incorporated a laminated Terfenol-D slab in this actuator to reduce the skin effect, leading to high-frequency, high-speed operation. We have also designed and constructed the power electronics and control units for the magnetostrictive actuator's open-loop and closed-loop operations. With a series resonant capacitor, we were able to achieve a near-unity power factor and decrease the reactive power requirement by a factor of 20. The magnetostrictive motor has demonstrated 12 mm/s speed at excitation frequency of 1600 Hz, and shown 140 N load capacity. The effective travel range of the present motor is 25 mm, and can be extended further. This linear magnetostrictive motor shows great potential in high-force precision positioning applications such as automotive actuators, robotics, and flight control surface actuators.
我们利用层压Terfenol-D (Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/)元素的蠕动运动开发了一种新型的增程线性磁致伸缩电机。该元件的迁移方向与传统三相电枢换向产生的行进磁场方向相反。执行机构的机械设计为开放式结构,以便于组装和访问内部执行机构组件。八套贝尔维尔垫圈保证均匀挤压预负荷,尽管磨损,热膨胀,或运动元件的运动。我们在执行器中加入了层压Terfenol-D板,以减少集肤效应,从而导致高频,高速操作。我们还设计并构建了用于磁致伸缩执行器开环和闭环操作的电力电子和控制单元。使用串联谐振电容器,我们能够实现接近统一的功率因数,并将无功功率需求降低20倍。磁致伸缩电机在激励频率为1600 Hz时的速度为12 mm/s,负载能力为140 N。现有电机的有效行程范围为25mm,并可进一步扩展。这种线性磁致伸缩电机在汽车致动器、机器人和飞行控制表面致动器等高力精密定位应用中显示出巨大的潜力。
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引用次数: 12
Voice actuation with context learning for intelligent machine control 基于上下文学习的语音驱动智能机器控制
R. Sepe, J.F. Pace
This paper develops an interactive voice actuated control system for a materials testing machine. Voice commands are passed through a user-command predictor and integrated with a graphical user interface control panel to allow hands-free operation. The user-command predictor learns operator command patterns on-line and predicts the most likely next action. It assists less experienced operators by recommending the next command, and it adds robustness to the voice command interpreter by verbally asking the operator to repeat unlikely commanded actions. The voice actuated control system applies to industrial machines whose normal operation is characterized by a nonrandom series of commands.
本文开发了一种用于材料试验机的交互式语音控制系统。语音命令通过用户命令预测器传递,并与图形用户界面控制面板集成,允许免提操作。用户命令预测器在线学习操作员命令模式,并预测最有可能的下一步行动。它通过推荐下一个命令来帮助经验不足的操作员,并通过口头要求操作员重复不太可能的命令操作来增加语音命令解释器的鲁棒性。语音驱动控制系统适用于以非随机指令序列为特征的工业机器的正常运行。
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引用次数: 2
A high voltage pulsed power system for electrostatic precipitators 一种用于静电除尘器的高压脉冲电源系统
Won-Ho Kim, Jong-Soo Kim, Lo-Won Kang, G. Rim
With the increasing demands for a clean environment, development of air cleaning systems has been receiving increased attention. One of the key technologies in the electrostatic precipitator (EP) is a high voltage pulsed power supply, which affects the performance of the overall system. In this study, a high voltage microsecond pulse power supply for an EP is developed for 500 MW coal power plant emission controls. The power supply has a DC and a pulsed source. The ratings of the DC and the pulsed source are 60 kV/800 mA and 70 kV/400 mA, respectively.
随着人们对洁净环境的要求越来越高,空气净化系统的发展受到越来越多的关注。高压脉冲电源是电除尘器的关键技术之一,它直接影响到整个系统的性能。本研究开发了一种用于500mw燃煤电厂排放控制的高压微秒脉冲电源。该电源有直流电源和脉冲电源。直流电源和脉冲电源的额定值分别为60 kV/800 mA和70 kV/400 mA。
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引用次数: 10
A neural network based positional tracking controller for servo systems 基于神经网络的伺服系统位置跟踪控制器
P. Boyagoda, M. Nakaoka
Most neural network (NN) based trajectory tracking controllers for servo systems are built on learning explicit inverse dynamics of the system to be controlled. However, due to various complexities in these systems, the learning process may require a large amount of training data to obtain the exact dynamics of the system. To overcome this problem a novel NN based trajectory tracking controller is introduced which neither requires a priori knowledge of the dynamics nor learning of system dynamics. The proposed control scheme incorporates expert knowledge and is decentralized to deactivate the coupled dynamics associated with certain systems like robotic manipulators. The NN is employed to classify the system input-output measurements into several patterns depending on the displacement and velocity deviations from the respective desired trajectories. A proportional plus derivative gain control action is determined from a look-up table corresponding to the classification from the NN. Furthermore, an integrator is applied to enhance system performance. Several PD gains are introduced in a staggered format relative to the magnitudes of the displacement and velocity tracking errors, resulting in a controller that is robust to both structured and unstructured uncertainties.
大多数基于神经网络的伺服系统轨迹跟踪控制器都是建立在学习被控系统的显式逆动力学的基础上的。然而,由于这些系统的各种复杂性,学习过程可能需要大量的训练数据来获得系统的确切动态。为了克服这一问题,提出了一种新的基于神经网络的轨迹跟踪控制器,该控制器既不需要先验的动力学知识,也不需要学习系统动力学。所提出的控制方案结合了专家知识,并且是分散的,以消除与某些系统(如机器人操纵器)相关的耦合动力学。利用神经网络将系统输入-输出测量值根据各自期望轨迹的位移和速度偏差分类为几种模式。比例加导数增益控制动作由与神经网络分类相对应的查找表确定。此外,还采用了积分器来提高系统性能。相对于位移和速度跟踪误差的大小,以交错格式引入了几个PD增益,从而使控制器对结构化和非结构化不确定性都具有鲁棒性。
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引用次数: 4
Improvement of synchronous reluctance motor design through finite-element analysis 通过有限元分析改进同步磁阻电机的设计
A. Vagati, A. Canova, Mario Chiampi, M. Pastorelli, Maurizio Repetto
The key-points in the design of synchronous reluctance motors are first evidenced and discussed, that is the choice of rotor type, the stator-rotor joint design, the optimization of the rotor structure. A purposely-designed finite-element code is then introduced and validated, on the basis of properly obtained experimental data. Measured and computed torques are compared, with emphasis on the evaluation of the torque ripple. Last, the FEM code is used to illustrate some aspects of the stator/rotor design and to show the torque-ripple performance of different types of machine structure.
首先论述了同步磁阻电机设计中的关键问题,即转子类型的选择、定子-转子接头的设计、转子结构的优化。然后介绍了专门设计的有限元程序,并在适当获得的实验数据的基础上进行了验证。对实测扭矩和计算扭矩进行了比较,重点对扭矩脉动进行了评价。最后,利用有限元程序对定子/转子设计的一些方面进行了说明,并展示了不同类型机械结构的转矩脉动性能。
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引用次数: 26
Electro-mechanical re-adhesion control simulator for inverter-driven railway electric vehicle 变频驱动轨道电动车机电再粘控制模拟器
Wooseok Kim, Yong-Seok Kim, Jun-Koo Kang, S. Sul
In this paper, an electromechanical re-adhesion control simulator is proposed for an inverter-driven railway electric vehicle. The basic characteristics of the re-adhesion phenomenon in electric railway systems is analyzed, and an electromechanical model of the railway system is developed based upon those characteristics. Based on the system model analysis, a electromechanical re-adhesion control simulator is designed. The proposed simulator has a wheel-to-wheel structure, which corresponds to the rail-to-wheel of real railway systems. To evaluate the feasibility of the simulator, experiments of re-adhesion are performed with a simple re-adhesion control algorithm. Experimental results prove that the simulator provides an electrical and mechanical environment similar to real railway electric vehicle systems.
本文提出了一种用于逆变驱动轨道电动车辆的机电再粘接控制模拟器。分析了电气化铁路系统再粘现象的基本特征,并根据这些特征建立了电气化铁路系统的机电模型。在系统模型分析的基础上,设计了机电再粘接控制模拟器。所提出的仿真器具有轮对轮结构,与实际铁路系统的轮对轮结构相对应。为了评估该模拟器的可行性,采用简单的再粘附控制算法进行了再粘附实验。实验结果表明,该仿真器提供了与真实轨道电动车辆系统相似的电气和机械环境。
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引用次数: 26
Robust speed estimation for speed sensorless vector control of induction motors 异步电动机无速度传感器矢量控制的鲁棒速度估计
Sang-Uk Kim, Iee-Woo Yang, Eul-jae Lee, Young-Bong Kim, Jong-Tai Lee, Young-Seok Kim
In this paper, some new approaches by using an adaptive binary observer, a reduced order extended Kalman filter and a two degrees of freedom controller to a high performance variable drive system for induction motors without a speed sensor are proposed. The speed sensorless vector controls realized in this paper have robustness to load and parameter variations and excellent dynamic characteristics in comparison with conventional speed sensorless vector control schemes. The binary observer estimates the rotor speed and rotor flux with alleviation of the high frequency chattering, and retains the benefits achieved in the conventional sliding observer. The reduced order extended Kalman filter for sensorless control has advantage of saving computation time and simplifying structure in comparison with the full order extended Kalman filter, and also retains the benefits achieved in the extended Kalman filter, such as good robustness to measurement noise and parameter variation. In the two degrees of freedom controller, a feedback controller to robustly control the variations of the rotor resistance is implemented by H/sub /spl infin// control theorem, and a feedforward controller to obtain good tracking performance is designed. Newly proposed systems implement the speed sensorless vector control of induction motors by 32-bit floating point TMS 320C31 DSP.
本文提出了采用自适应二值观测器、降阶扩展卡尔曼滤波器和二自由度控制器对无速度传感器异步电动机的高性能变量驱动系统进行控制的新方法。与传统的无速度传感器矢量控制方案相比,本文实现的无速度传感器矢量控制具有对负载和参数变化的鲁棒性和良好的动态特性。二元观测器估计转子转速和转子磁链,减轻了高频抖振,并保留了传统滑动观测器的优点。与全阶扩展卡尔曼滤波器相比,用于无传感器控制的降阶扩展卡尔曼滤波器具有节省计算时间和简化结构的优点,并且保留了扩展卡尔曼滤波器的优点,如对测量噪声和参数变化具有良好的鲁棒性。在二自由度控制器中,利用H/sub /spl / infin//控制定理实现了对转子电阻变化的鲁棒控制反馈控制器,并设计了具有良好跟踪性能的前馈控制器。该系统采用32位浮点tms320c31 DSP实现了异步电动机的无速度传感器矢量控制。
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引用次数: 10
Current handling and nonshorting feature of multilayer polymer (film) capacitors 多层聚合物(膜)电容器的电流处理及不短路特性
I. Clelland, R. Price
Many DC-to-DC converters are under-filtered when it comes to RFI control and must be decoupled externally. Because the input filter section sees a moderate to low series current, normally one or two amps at 48 volts, a small valued capacitor can be used on the input, provided the dissipation factor is low enough to efficiently sink the ripple current, and the high frequency impedance is low enough to bypass reflected RFI. These capacitors can be either X7R ceramic or special multilayer polymer film (MLP) capacitors. Both types are built on a "stacked" layer construction that features very low impedance and ESR extending well beyond the switching frequency of high-density converters. Developments to provide higher capacitance values in small package sizes have now led to the use of these low ESR capacitors in output filters where the load currents are at least ten times higher than on the higher voltage input bus. The selection of an electrostatic capacitor (ceramic or film) can improve the reliability of the power system to a level where the tantalum electrolytic capacitors typically used can either be reduced in number or eliminated from the output filter. MLP capacitors represent the next generation of capacitor technology. While its mechanical structure is next generation technology, it is still based on proven film capacitor fundamentals with their established track record of both durability and reliability.
当涉及到RFI控制时,许多dc - dc转换器滤波不足,必须在外部解耦。因为输入滤波器部分看到一个中等到低的串联电流,通常是1或2安培在48伏,一个小值电容器可以用于输入,提供耗散系数足够低,以有效地吸收纹波电流,高频阻抗足够低,以绕过反射的RFI。这些电容器可以是X7R陶瓷或特殊的多层聚合物薄膜(MLP)电容器。这两种类型都建立在“堆叠”层结构上,具有非常低的阻抗和ESR,远远超出高密度转换器的开关频率。为了在小封装尺寸中提供更高的电容值,现在已经导致在输出滤波器中使用这些低ESR电容器,其中负载电流至少比高压输入总线高十倍。静电电容器(陶瓷或薄膜)的选择可以提高电力系统的可靠性,使通常使用的钽电解电容器可以减少数量或从输出滤波器中消除。MLP电容器代表了下一代电容器技术。虽然它的机械结构是下一代技术,但它仍然基于成熟的薄膜电容器基础,具有耐久性和可靠性的既定记录。
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引用次数: 0
期刊
Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370)
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