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2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)最新文献

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A New Space Vector Modulation Technique for Reducing Switching Losses in Induction Motor DTC-SVM Scheme 一种降低感应电机DTC-SVM方案开关损耗的空间矢量调制新技术
Seyyed Ahmad Vaezi, H. Iman‐Eini, R. Razi
Direct torque control (DTC) scheme is one of the most appropriate methods to control of AC machines. This method has positive features such as fast response, simple structure and low dependence on motor parameters. However, the main problems in classic DTC method are variation of switching frequency and high ripple of flux and torque. These problems are approximately solved in the literature using advanced controllers and space vector modulation. Nevertheless, this paper presents a new DTC method using space vector modulation (DTC-SVM) in three-level cascaded H-bridge (CHB) converter, which has less switching losses than the conventional SVM (CSVM) methods. The proposed method uses switching sequences according to the reference voltage modulation index, which reduces the number of switching commutation and switching losses. Finally, the performance of the proposed method is presented through simulations in MATLAB/SIMULINK software.
直接转矩控制(DTC)方案是控制交流电机最合适的方法之一。该方法具有响应速度快、结构简单、对电机参数依赖性小等优点。然而,传统的直接转矩控制方法存在开关频率变化、磁链和转矩波动大等问题。这些问题在文献中使用先进的控制器和空间矢量调制大致解决。然而,本文提出了一种利用空间矢量调制(DTC-SVM)在三电平级联h桥(CHB)变换器中进行切换的新方法,该方法比传统的支持向量机(CSVM)方法具有更小的开关损耗。该方法根据参考电压调制指数采用开关顺序,减少了开关换流次数和开关损耗。最后,在MATLAB/SIMULINK软件中进行了仿真,验证了该方法的性能。
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引用次数: 5
Real-Time Bearing Fault Diagnosis of Induction Motors with Accelerated Deep Learning Approach 基于加速深度学习的异步电机轴承故障实时诊断
Shahabodin Afrasiabi, M. Afrasiabi, Benyamin Parang, M. Mohammadi
This study introduces an efficient deep neural network based bearing fault detection of induction motors. An approach to accelerate and compress convolutional neural networks (CNN) is the basis of the proposed method. As the main advantages, the proposed algorithm is 1) directly applicable to raw data, 2) highly accurate, 3) non-time consuming, 4) applicable to different types of electric machines, 5) merges feature extraction and detection into a single machine learning, and 6) reduces computational burden of conventional CNN. To address and verify the proposed method, the experimental dataset of Case Western Reserve University (CWRU) bearing data center is used. The results show the impressive capability of the proposed CNN method high precision fault detection, comparing with conventional CNN as deep-based structure method and support vector machine (SVM), artificial neural network (ANN), and learning vector quantization (LVQ) as shallow-based structure methods.
介绍了一种基于深度神经网络的高效感应电机轴承故障检测方法。一种加速和压缩卷积神经网络(CNN)的方法是该方法的基础。该算法的主要优点是:1)直接适用于原始数据,2)精度高,3)不耗时,4)适用于不同类型的电机,5)将特征提取和检测合并到一个机器学习中,6)减少了传统CNN的计算负担。为了解决和验证所提出的方法,使用了凯斯西储大学(CWRU)轴承数据中心的实验数据集。结果表明,与传统的基于深度结构的CNN方法和基于浅层结构的支持向量机(SVM)、人工神经网络(ANN)和学习向量量化(LVQ)方法相比,该方法具有较高的故障检测精度。
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引用次数: 28
Modeling and Analysis of a Modular Hybrid Reluctance Motor for High-Torque Applications 大转矩模块化混合磁阻电机的建模与分析
Milad Alizadeh, A. Baktash
The main contribution of this research is to present a modular hybrid reluctance motor (MHRM) for high-torque drive systems. The main sizes and parameters of the structure are presented. To obtain the main characteristics of the suggested HRM, a two dimensional finite element method (FEM) is used. The flux distributions at the alignment and unalignment of the rotor, flux linkage, and magneto-static torque profiles of the proposed topology are provided. In addition, the magnetic circuit model (MCM) of the introduced motor is derived, the reluctances of the machine are calculated, and the static features of the motor are attained from the MCM are compared with those of the FEM. The results are indicative of the fact that there is an acceptable discrepancy between the results of the FEM and MCM. Finally, it is shown that the HRM produces higher torque than the conventional SRM.
本研究的主要贡献是提出了一种用于大扭矩驱动系统的模块化混合磁阻电机(MHRM)。给出了结构的主要尺寸和参数。为了获得所建议的人力资源管理的主要特征,采用了二维有限元法。给出了转子对中和不对中时的磁通分布、磁链以及所提出的拓扑结构的静磁转矩分布。在此基础上,推导了电机的磁路模型,计算了电机的磁阻,并与有限元法比较了电机的静态特性。结果表明,有限元计算结果与MCM计算结果之间存在可接受的差异。最后,研究表明,与传统的SRM相比,HRM产生了更高的扭矩。
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引用次数: 0
Design and Investigation of Single-Tuned Passive Filter in Distribution Networks Based on Pareto Optimal Fronts 基于Pareto最优前沿的配电网单调谐无源滤波器设计与研究
Javad Khajouei, S. Esmaeili, S. M. Nosratabadi
Since the utilization of nonlinear loads such as power electronic converters have been increased and also because of the wide range of their usage and the creation of harmful harmonics, active and passive filters must be used to eliminate the effect of harmonics. In this paper, passive filters have been utilized because of fewer cost in terms of installation, maintenance and repair compared with active filters. The purpose of the current study is to find the optimal location of single-tuned passive filter and detect the size of its elements in distribution networks by a multi-objective approach. The objective functions include the reduction of network losses, initial investment cost and the improvement of the frequency response on critical buses. In this problem limitations such as buses voltage profile and harmonic distortion of the network are considered. To assess the proposed procedure, 33-bus IEEE test distribution network is used. As results the amount of network losses, buses profile voltage, and the network harmonic distortion are evaluated before and after the filtering and the accuracy of the method is evaluated too.
由于电力电子变流器等非线性负载的使用越来越多,而且它们的使用范围很广,会产生有害的谐波,因此必须使用有源和无源滤波器来消除谐波的影响。与有源滤波器相比,无源滤波器的安装、维护和维修成本更低,因此本文采用无源滤波器。本研究的目的是利用多目标方法寻找单调谐无源滤波器的最优位置,并检测其在配电网中的元件大小。目标函数包括降低网络损耗、降低初始投资成本和改善关键母线的频率响应。该问题考虑了母线电压分布和电网谐波畸变等限制条件。为了评估所提出的程序,使用了33总线IEEE测试配电网。计算了滤波前后的网络损耗量、母线电压、网络谐波畸变,并对该方法的准确性进行了评价。
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引用次数: 1
Comprehensive Research on a Modular-Stator Linear Switched Reluctance Motor with a Toroidally Wound Mover for Elevator Applications 电梯用环形卷绕式模定子线性开关磁阻电机的综合研究
Matin Vatani, M. Mirsalim
This paper presents a novel modular-stator linear switched reluctance motor (MSLSRM) for elevator applications. The topology and its operating principle is illustrated and the magnetic equivalent circuit is derived for the aligned position. To attain the electromagnetic features of the motor, two dimensional and three dimensional finite element methods are employed. The static inductance and force profiles are obtained and the flux density distributions are given. Also, the dynamic operation of the introduced motor is performed. To demonstrate the positive sides of the suggested motor, a fair comparative study is done. To this end, two linear motors are considered and the static performance and dynamic waveforms of the three motors are compared. It is illustrated that the new motor has higher mean force and lower force ripple in comparison with the considered SRMs.
提出了一种新型的电梯用模定子线性开关磁阻电动机。说明了其拓扑结构和工作原理,推导了对准位置的磁等效电路。为了获得电机的电磁特性,采用了二维和三维有限元方法。得到了静电感和力分布,并给出了磁通密度分布。同时,对所引入的电机进行动态运行。为了证明所建议的电机的积极方面,进行了公平的比较研究。为此,考虑了两种直线电机,并对三种电机的静态性能和动态波形进行了比较。结果表明,与所考虑的srm相比,新电机具有更高的平均力和更小的力脉动。
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引用次数: 7
A New Structure with New Algorithms for Cascaded Multilevel Inverters by Reducing Number of IGBTs 减少igbt数量的级联多电平逆变器新结构和新算法
Z. Bayat, E. Babaei, M. Serajian, Carlo Cecati, C. Buccella
Cascaded multilevel inverters are usually used in a medium-voltage output. Hence, this converter has been declared as a vital substitute in the average-voltage inverter. In this article a novel structure for cascaded multilevel inverters have been proposed. Also, five algorithms are suggested to determine the amount of resources which are used in the new structure. The suggested topology has a number of benefits, including reducing the quantity of IGBTs and switches and required fee and installation area. Another benefit of the suggested structure is lower variety of the values of dc voltage sources in comparison with conventional structures. In this paper, the ability of proposed topology to produce all voltage levels with the result of the simulation is given to a17-level inverter.
级联多电平逆变器通常用于中压输出。因此,该变换器已被宣布为平均电压逆变器的重要替代品。本文提出了一种新型的级联多电平逆变器结构。此外,还提出了五种算法来确定新结构中使用的资源量。所建议的拓扑结构有许多优点,包括减少igbt和交换机的数量以及所需的费用和安装面积。与传统结构相比,所建议的结构的另一个优点是直流电压源值的变化较小。本文对一个17电平逆变器的仿真结果给出了所提出的拓扑产生所有电压电平的能力。
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引用次数: 3
A Novel Multi-Objective Topology for In-Motion WPT Systems with an Input DG Source 一种具有DG输入源的运动中WPT系统的新型多目标拓扑
Amir Babaki, S. Vaez‐Zadeh, Majid Moghaddam, A. Zakerian
On-road dynamic charging of electric vehicles with distributed generation (DG) sources has emerged recently as a cost-saving means for modern transportation. The resonant converter as a common WPT topology is not a suitable choice here due to several deficiencies. In this paper, a novel low-frequency multi-objective WPT topology, based on loosely coupled flayback converter with the compatible energy recovery circuit is proposed against the restriction of resonant converter. In this system, an input DG source (photovoltaic (PV)) produces its maximum possible power to supply the EV according to the MPPT algorithm. The remaining energy is stored in the back-up battery during each switching interval and can be injected to the EV drive train, whenever the PV power is not in access. Extensive simulation results using MATLAB-Simulink is presented to validate the proposed WPT topology and its multi-stage control system.
基于分布式电源的电动汽车道路动态充电作为一种节约成本的现代交通方式,近年来逐渐兴起。谐振变换器作为一种常见的WPT拓扑结构在这里不是一个合适的选择,由于几个缺陷。本文针对谐振变换器的限制,提出了一种基于松耦合反放变换器和兼容能量回收电路的低频多目标WPT拓扑结构。在该系统中,输入DG源(PV)根据MPPT算法产生最大可能功率供电给EV。在每个切换间隔期间,剩余的能量存储在备用电池中,当光伏电源无法接入时,可以将剩余能量注入电动汽车传动系统。利用MATLAB-Simulink进行了大量仿真,验证了所提出的WPT拓扑结构及其多级控制系统。
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引用次数: 4
New Non-Isolated High Voltage Gain Single-Switch DC-DC Converter Based on Voltage-Lift Technique* 基于升压技术的新型非隔离高电压增益单开关DC-DC变换器*
Farhad Abbasi Aghdam Meinagh, Vida Ranjbarizad, E. Babaei
In this paper, a new non-isolated high gain DC-DC converter using one switch and a combination of the voltage-lift and switched-capacitor networks is proposed with wide variation range for the duty cycle. This converter has one switch and a low number of elements in its topology. Moreover, the proposed converter can achieve high conversion ratios showing the low voltage stress for its semiconductors and capacitors. In this paper, the analysis of the steady-state and related equations are given. Finally, the simulation results are given to validate the theoretical analysis.
本文提出了一种新型的无隔离高增益DC-DC变换器,该变换器采用单开关、升压网络和开关电容网络组合,占空比变化范围大。该转换器在其拓扑结构中具有一个开关和少量元件。此外,所提出的转换器可以实现高转换率,显示其半导体和电容器的低电压应力。本文给出了系统的稳态分析和相关方程。最后给出了仿真结果,验证了理论分析的正确性。
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引用次数: 10
A Comprehensive Time-domain-based Optimization of a High-Frequency LLC-based Li-ion Battery Charger 基于llc的高频锂离子电池充电器时域综合优化
S. Karimi, F. Tahami
The LLC resonant converter, as a promising solution for battery charger applications, has the ability to adjust its output voltage during Constant Current and Constant Voltage modes in the charging profile. However, its operation mode changes as switching frequency changes. Therefore, for efficiency-oriented optimizations in battery charger applications, the one-pointed efficiency is not an appropriate objective. To this end, in this paper, a multi-pointed averaged efficiency is considered for optimization along with the transformer volume. Another factor of a proper design for a wide output range LLC is the converter peak voltage gain that is calculated based on an accurate method. The efficiency calculations are carried out by using time-domain-based analysis for every operation points. Regarding dead-time, a worst case is realized during the charging profile. At last, a 500W 400V:48V battery charger is designed with this procedure, and verified by simulation.
LLC谐振变换器作为一种很有前途的电池充电器应用解决方案,能够在充电配置文件中的恒流和恒压模式下调整其输出电压。但其工作方式随开关频率的变化而变化。因此,对于电池充电器应用中以效率为导向的优化,单点效率不是一个合适的目标。为此,本文考虑了多点平均效率随变压器体积的变化进行优化。宽输出范围有限责任公司设计的另一个因素是基于精确方法计算的变换器峰值电压增益。利用时域分析对各作业点进行效率计算。对于死区时间,在充电过程中会出现最坏的情况。最后利用该程序设计了500W 400V:48V电池充电器,并进行了仿真验证。
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引用次数: 3
A Five-Switch Active NPC With Low Output Voltage THD For Photovoltaic Applications 一种用于光伏应用的低输出电压的五开关有源NPC
Mohammad Zamani Khaneghah, A. Abrishamifar
Multilevel Inverters (MIs) have great applications These days as one of best answer for medium and high power usages. The Five-Level Active-Neutral-Point-Clamped Inverter (FANPCI) merges the specifications of the typical flying-capacitor type and Neutral-Point-Clamped type inverter and was commercially used for industrial applications. In this paper, a new five-level five active switches and four diodes has been proposed, which employs only five active switches and four discrete diodes to produce all the five levels. Also, the modulation technique applied for the five-level five-switch NPC inverter has been discussed. Finally, a 4KVA single-phase prototype has simulated by using the PSPICE software to check the feasibility of the presented structure and control strategy.
多电平逆变器(MIs)有很大的应用,这些天为中,高功率使用的最佳答案之一。五电平有源中性点箝位逆变器(FANPCI)融合了典型的飞电容型和中性点箝位型逆变器的规格,并在商业上用于工业应用。本文提出了一种新的五电平五有源开关和四二极管,它只需要五个有源开关和四个分立二极管就可以产生所有的五个电平。并对五电平五开关NPC逆变器的调制技术进行了讨论。最后,利用PSPICE软件对4KVA单相样机进行了仿真,验证了所提结构和控制策略的可行性。
{"title":"A Five-Switch Active NPC With Low Output Voltage THD For Photovoltaic Applications","authors":"Mohammad Zamani Khaneghah, A. Abrishamifar","doi":"10.1109/PEDSTC.2019.8697812","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697812","url":null,"abstract":"Multilevel Inverters (MIs) have great applications These days as one of best answer for medium and high power usages. The Five-Level Active-Neutral-Point-Clamped Inverter (FANPCI) merges the specifications of the typical flying-capacitor type and Neutral-Point-Clamped type inverter and was commercially used for industrial applications. In this paper, a new five-level five active switches and four diodes has been proposed, which employs only five active switches and four discrete diodes to produce all the five levels. Also, the modulation technique applied for the five-level five-switch NPC inverter has been discussed. Finally, a 4KVA single-phase prototype has simulated by using the PSPICE software to check the feasibility of the presented structure and control strategy.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126891384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)
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