2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)最新文献_第2页

Optimization of magnetic circuits for loudspeakers 1970 and now 1970年和现在扬声器磁路的优化

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803149

M. Marinescu, N. Marinescu, S. Kuhn

{"title":"Optimization of magnetic circuits for loudspeakers 1970 and now","authors":"M. Marinescu, N. Marinescu, S. Kuhn","doi":"10.1109/ISFEE.2016.7803149","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803149","url":null,"abstract":"One of the largest volume applications of permanent magnet materials are loudspeaker systems. High performant loudspeakers can be obtained by using rare earth permanent magnets with a high residual flux density, as for instance NdFeB. Because such devices are produced in a very large quantity and because the rare earth permanent magnets are quite expensive, it is very important for the manufacturer to keep the volume of the magnetic material used as low as possible. This aim can be achieved by using design methods to optimize the magnetic circuit of the loudspeaker, i. e. to obtain a given flux density in the air gap with a minimum volume of magnetic material. Prof. A. Timotin has done in this respect pioneering work. He and one of the authors of the present work have calculated the magnetic flux in the air gap as well the leakage fluxes of a loudspeaker system by solving analytically the magnetic potential equation with given boundary conditions. Also they have formulated certain constraints on the geometrical parameters of the system to be optimized. However the analytical solution could be obtained only under simplifying assumptions which practically are fulfilled only approximately. Such limitations can be avoided by using numerical methods for computation of the magnetic field. In this work we present the optimization of a large class of magnetic circuits for loudspeaker systems by using high precision numeric finite-elements-method computations.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126030248","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: 2

Potential early-stage cancer identification technique during endoscopic examination 内镜检查中潜在的早期癌症识别技术

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803180

Y. Cheng, Ching-Hwa Cheng

引用次数: 0

Comparative assessment of power loss among four typical wind turbines in power distribution system 配电系统中四种典型风力机的功率损耗比较评估

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803227

Milad Gheydi, Melika Hamian, P. Farhadi, R. Ghafari

{"title":"Comparative assessment of power loss among four typical wind turbines in power distribution system","authors":"Milad Gheydi, Melika Hamian, P. Farhadi, R. Ghafari","doi":"10.1109/ISFEE.2016.7803227","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803227","url":null,"abstract":"Power loss in current power distribution systems is of critical importance and greatly influences sizing of electric devices. In this paper, four types of wind turbines (WTs) are evaluated and simulated on IEEE 33-bus test system using ETAP software: Type-1: fixed-speed conventional induction generator; Type-2: variable slip induction generator with variable rotor resistance; Type-3: variable speed doubly-fed asynchronous generator with rotor-side converter; and Type-4: variable speed asynchronous generator with full converter interface. ETAP software is one of the most powerful and practical simulation packages used for power system transient studies. Four scenarios are considered in this study. In the first scenario, no WTs are installed in the network and the system operates in conventional fashion. In the second scenario, WT is integrated in upstream network; while in the third scenario, WTs are installed in distributed fashion in two positions through the network. In this state, all four types of turbines are examined in terms of power loss in different and sensitive locations of the network. In addition, power losses related to each type in each part of the system are compared with each other and when no WTs are installed. Furthermore, voltage drop of each bus to which the WT may be connected is measured in order to get the appropriate WT in each scenario in terms of power loss.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114375053","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: 5

Parameter identification of magnetic coupled resonators in power wireless transfer systems 电力无线传输系统中磁耦合谐振器的参数辨识

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803171

Maria-Lavinia Iordache, Marilena Stănculescu, M. Iordache, D. Niculae, V. Bucata

引用次数: 3

Determination of the power loss in inverters which supplies a BLDC motor 无刷直流电机逆变器功率损耗的测定

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803168

M. I. Neacă, A. Neaca

{"title":"Determination of the power loss in inverters which supplies a BLDC motor","authors":"M. I. Neacă, A. Neaca","doi":"10.1109/ISFEE.2016.7803168","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803168","url":null,"abstract":"This paper presents a methodology for estimating the losses occurring inside an inverter with full controlled bridge supply for supplying a BLDC motor. The motor drives a small vehicle. The PWM inverter supply voltages on the three phases starting from an accumulator battery and is made with MOSFET transistors. The proposed method presents a method of determining the losses of a transistor located on top of the three-phase bridge and a transistor located on the bottom of the bridge. It is based on the use of data from the catalog sheet specified by the manufacturer of the power transistor. To facilitate the understanding and application of the calculation of losses in various types of MOSFET we choose to complete the equations with numerical values determined based on the catalog sheet of the transistor which fits the analyzed inverter. Note that the precision of the results provided by the methodology proposed in the paper can be improved if one takes into account changing some transistor parameters due to its heating. The methodology was designed in order to allow the implementation of a MATLAB-SIMULINK system integrated with modeling and simulation systems of the inverters for motor supplying.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123553480","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: 4

Lightning impulse type overvoltage transmitted between the windings of the transformer 在变压器各绕组之间传输的雷击式过电压

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803167

M. Niţu, C. Nicola, D. Popa, V. Voicu, M. Duta

引用次数: 2

Design and implementation of programmable PV simulator 可编程PV模拟器的设计与实现

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803229

Ozlem Ozden, Yanki Duru, S. Zengin, M. Boztepe

引用次数: 9

Simulation of electric potential in 3D neuronal axon 三维神经元轴突电势模拟

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803206

Ruxandra Bărbulescu

引用次数: 1

Electromechanical model and operating modes of high-voltage induction motor electric drive — Part I: Impact torque and currents 高压感应电动机电驱动的机电模型和工作模式。第1部分:冲击扭矩和电流

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803188

S. Rachev, D. Koeva, I. Ivanov

引用次数: 11

Performance investigation of high level modular multilevel inverter based shunt hybrid active power filter 基于并联混合有源电力滤波器的高电平模块化多电平逆变器性能研究

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE) Pub Date : 2016-06-01 DOI: 10.1109/ISFEE.2016.7803200

T. Demirdelen, R. İ. Kayaalp, M. Tumay

引用次数: 1