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2008 11th International Conference on Optimization of Electrical and Electronic Equipment最新文献

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Derating of transformers under non-sinusoidal loads 变压器在非正弦负载下的降额
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602376
S. B. Sadati, A. Tahani, M. Jafari, M. Dargahi
{"title":"Derating of transformers under non-sinusoidal loads","authors":"S. B. Sadati, A. Tahani, M. Jafari, M. Dargahi","doi":"10.1109/OPTIM.2008.4602376","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602376","url":null,"abstract":"Transformers are normally designed and built for utilizing at rated frequency and prefect sinusoidal loads. Supplying non-linear loads by transformer leads to higher losses, early fatigue of insulation, and reduction of the useful life of transformer. To prevent these problems rated capacity of transformer supplying non-linear loads must be reduced. In this paper, at first, a useful model of transformer under harmonic condition is presented. The model in addition to ordinary parameters includes a potential difference defined as the second derivative of the load current that represents eddy current losses in windings and the other stray losses represented as a resistor in series with the leakage inductance and dc resistance. Finally, losses and capacity of 50 KVA transformer under harmonic load current is calculated. This model simulated in MATLAB/Simulink and then its results are compared with losses and capacity calculated by standard.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130071439","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: 30
The magnetic noise of three-phase induction motors with squirrel cage rotors 鼠笼式转子三相感应电动机的磁噪声
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602388
I. Peter, G. Scutaru
{"title":"The magnetic noise of three-phase induction motors with squirrel cage rotors","authors":"I. Peter, G. Scutaru","doi":"10.1109/OPTIM.2008.4602388","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602388","url":null,"abstract":"In this paper a study of the magnetic noise in three-phase one and two-speed cage rotor, totally enclosed, externally cooled induction motors is presented. Investigations include two-speed three-phase induction motors with Dahlander winding connection or separate windings, with rated speeds of 3000/1500 rpm, 1500/750 rpm, 1500/1000 rpm. The investigated motors (manufactured by SC Electroprecizia SA) were placed in a semi-anechoic chamber in order to determine the noise versus frequency characteristics (spectrograms). The paper is based on results and conclusions obtained after analyzing these spectrograms. The importance of the pressure applied by the stacking of the stator laminations for the level of the magnetic noise is also presented.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130448315","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
On the designing procedure of a permanent magnet transverse flux generator (PMTFG) with specific topology 具有特定拓扑结构的永磁横向磁通发生器的设计过程
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602394
L. Strete, I. Viorel, A. Viorel
{"title":"On the designing procedure of a permanent magnet transverse flux generator (PMTFG) with specific topology","authors":"L. Strete, I. Viorel, A. Viorel","doi":"10.1109/OPTIM.2008.4602394","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602394","url":null,"abstract":"The permanent magnet transverse flux (PMTF) machine operates at low speed and is capable of producing power densities larger than the ones produced by conventional machines. The PMTF machine has the advantage of modularity, since each phase is an independent module. Due to these features, a PMTF machine can be an excellent option for low and medium power, low speed gearless generators. In this paper a sizing-designing algorithm is developed and, for a sample generator, with a quite simple structure the performances are calculated and checked against that obtained via 3D finite element method (FEM) analysis. A set of TF motors were designed and their performances were compared to evince the features and the break points of the PMTF machine proposed.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133905251","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: 7
Optimization of the two-mass drive dynamics using different compensation feedbacks 采用不同补偿反馈的双质量驱动动力学优化
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602452
K. Szabat, T. Orłowska-Kowalska
{"title":"Optimization of the two-mass drive dynamics using different compensation feedbacks","authors":"K. Szabat, T. Orłowska-Kowalska","doi":"10.1109/OPTIM.2008.4602452","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602452","url":null,"abstract":"In this paper issues related to the vibration suppression in the drive system with an elastic joint are presented. The cascade control structure with two additional feedbacks from the shaft torque and the difference between speeds which allows the free location of the system closed- loop poles is considered. The influence of the system poles to the drive performance is shown. Then the control structure with additional feedbacks from the load torque and its derivatives, which allow rejection from the load speed the fall caused by the load torque change, is introduced and examined. To provide the information of non-measurable state variables the Extended Kalman Filter is used. The effectiveness of the proposed structure has been examined under simulation and experimental study.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132805139","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: 7
Control of a three-phase four-wire shunt-active power filter based on DC-bus energy regulation 基于直流母线能量调节的三相四线并联有源电力滤波器控制
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602371
P. Rodríguez, A. Luna, R. Teodorescu, F. Blaabjerg, Marco Liserre
{"title":"Control of a three-phase four-wire shunt-active power filter based on DC-bus energy regulation","authors":"P. Rodríguez, A. Luna, R. Teodorescu, F. Blaabjerg, Marco Liserre","doi":"10.1109/OPTIM.2008.4602371","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602371","url":null,"abstract":"This paper presents a nonconventional three-phase four-wire shunt active power filter (APF) topology controlled by using an energy approach. A general study of power terms involved in the operation of the four-wire APF is conducted in order to evidence the relationship between instantaneous energy stored in the DC bus and active power requirements on the APF. Harmonics and imbalances both on the utility voltage and load current have been considered and the power developed by the active power filter has been evaluated. This study allows designing a controller for the APF based on the regulation of the energy-state of its DC-bus. The method has been experimentally tested on a four leg APF based on a neutral-point-clamped DC bus. Such topology allowed the test of the most general case, including harmonics and imbalance in utility voltage and in load currents.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132999268","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: 9
Optimal design of a reliable hydrogen-based stand-alone wind/PV generation system 可靠的氢基独立风力/光伏发电系统的优化设计
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602442
A. Kaviani, G. Riahy, S.M. Kouhsarj
{"title":"Optimal design of a reliable hydrogen-based stand-alone wind/PV generation system","authors":"A. Kaviani, G. Riahy, S.M. Kouhsarj","doi":"10.1109/OPTIM.2008.4602442","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602442","url":null,"abstract":"A hybrid wind/photovoltaic/fuel cell generation system is designed to supply power demand. The aim of this design is minimization of overall cost of generation scheme over 20 years of operation. Optimization problem is subject to reliable supply of demand. The system components and radiation and wind speed datasets are assumed to be fully deterministic. System costs involve investments, operation and maintenance as well as loss of load costs. Prices are all unfeigned and components are commercially available. Wind and radiation datascts arc for northwest region of Iran. An advanced variation of Particle Swarm Optimization algorithm is used to solve the optimization problem.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133515436","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: 33
Optimal design of PMS machines for hybrid electric vehicles 混合动力汽车PMS机的优化设计
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602391
S. Sadeghi, A. H. Isfahani, M. Mirsalim, B. Asaei
{"title":"Optimal design of PMS machines for hybrid electric vehicles","authors":"S. Sadeghi, A. H. Isfahani, M. Mirsalim, B. Asaei","doi":"10.1109/OPTIM.2008.4602391","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602391","url":null,"abstract":"Permanent magnet synchronous machines are well suited for hybrid electric vehicles due to their unique merits. However they have two major drawbacks i.e. high cost and small speed range. In this paper an optimal design of a permanent magnet machine is presented. A reduction of permanent magnet material for a constant torque and an extension in speed and torque ranges are chosen as the optimization aims. For this purpose the analytical model of the permanent magnet synchronous machine is derived and the appropriate design algorithm is devised. The genetic algorithm is then employed to optimize some machine specifications. Finally the finite element method is used to validate the designed machine.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115025503","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: 1
Flux linkage in Transverse Flux machines with flux concentration 带焊剂浓缩的横向焊剂机中的焊剂连杆
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602381
M. Siatkowski, B. Orlik
{"title":"Flux linkage in Transverse Flux machines with flux concentration","authors":"M. Siatkowski, B. Orlik","doi":"10.1109/OPTIM.2008.4602381","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602381","url":null,"abstract":"In this paper the flux linkage between the permanent magnets in the rotor and the stator core of a Transverse Flux machine is investigated, with a special focus on the flux concentrating setup, which allows to utilize the core materials up to their saturation limits. FEM simulations are carried out to find the relation between the flux linkage and the size of the permanent magnets. Finally new design guidelines are developed for the construction of TFMs with regard to the magnetic circuit in a flux concentrating setup.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116797774","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: 15
Incremental / decremental SVM for function approximation 增量/递减支持向量机用于函数逼近
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602473
H. Gâlmeanu, Răzvan Andonie
{"title":"Incremental / decremental SVM for function approximation","authors":"H. Gâlmeanu, Răzvan Andonie","doi":"10.1109/OPTIM.2008.4602473","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602473","url":null,"abstract":"Training a support vector regression (SVR) resumes to the process of migrating the vectors in and out of the support set along with modifying the associated thresholds. This paper gives a complete overview of all the boundary conditions implied by vector migration through the process. The process is similar to that of training a SVM, though the process of incrementing / decrementing of vectors into / out of the solution does not coincide with the increase / decrease of the associated threshold. The analysis shows the details of incremental and decremental procedures used to train the SVR. Vectors with duplicate contribution are also considered. The migration of vectors among sets on decreasing the regularization parameter C is particularly given attention. Eventually, experimental data show the possibility of modifying this parameter on a large scale, varying it from complete training (overfitting) to a calibrated value, to tune up the approximation performance of the regression.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124482160","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: 8
3D finite element analysis of a permanent magnet electromagnetic valve actuator 永磁电磁阀执行机构的三维有限元分析
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602419
Yatchev, K. I-linov, V. Gucorgiev, D. Dimitrov
{"title":"3D finite element analysis of a permanent magnet electromagnetic valve actuator","authors":"Yatchev, K. I-linov, V. Gucorgiev, D. Dimitrov","doi":"10.1109/OPTIM.2008.4602419","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602419","url":null,"abstract":"The paper presents three-dimensional magnetic field analysis of recently developed electromagnetic valve actuator. Permanent magnet is employed in the actuator construction in order to reduce the energy consumption. Finite element method using magnetic vector potential formulation with edge elements is employed. Results are obtained for the magnetic field distribution and the static force of the actuator. Force-displacement characteristics for different values of the magnetomotive force arc also obtained.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129843373","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: 3
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