Recent Developments of Electrical Drives - Part 9 pps
Recent Developments of Electrical Drives - Part 46 ppsx
... Transformer of 3 kVA: Distribution of the magnetic field in the case of no-load.III-3.5. Improved Modeling of Three-Phase Transformer Analysis 459Table 3. Comparison of results case of unsymmetrical ... iAin the case of no-load.Figure 7. Computed and measured primary current iBin the case of no-load.Figure 8. Computed and measured primary current iCin the case of no-load.III-3.5. Improved ... expressions are established for all the partial derivatives of inductances vs. themagnetic reluctances R1T, R2T,R3T of the cores.III-3.5. Improved Modeling of Three-Phase Transformer Analysis 453Figure...
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Recent Developments of Electrical Drives - Part 1 potx
... the Library of Congress.ISBN -1 0 1- 4 02 0-4 53 4-4 (HB)ISBN -1 3 97 8 -1 -4 02 0-4 53 4-9 (HB)ISBN -1 0 1- 4 02 0-4 53 5-2 (e-book)ISBN -1 3 97 8 -1 -4 02 0-4 53 5-6 (e-book)Published by Springer,P.O. Box 17 , 3300 AA ... Brochet and A. Randria 10 1 11 . Electromagnetic Forces and Mechanical Oscillations of the Stator EndWinding of Turbo GeneratorsA. Gr¨uning and S. Kulig 11 5 12 . Optimization of a Linear Brushless ... with modern electrical drives. Looking at the con-tent of the book of digests one may also notice that the more and more researchers gointo the investigation of new applications of computer...
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Recent Developments of Electrical Drives - Part 2 docx
... (eds.), Recent Developments of Electrical Drives, 1 2. C 20 06 Springer. 2 Introductory Remarksharmonics in PM motors. The technique that consists on the choice of an appropriatenumber of magnet ... insure ex-tended torque-speed envelope with maximum-torque-perstator-current operation rangebelow the base speed as well as constant-power flux-weakening and maximum-torque-perstator-flux operation ... die-cast in India for agri-pumpingS. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 29 1 29 3.C 20 06 Springer.SECTIONIICONTROL, MEASUREMENTS,AND MONITORINGIntroductory...
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Recent Developments of Electrical Drives - Part 3 ppt
... Hitachi Ltd., 3- 1 -1 , Saiwaicho, Hitachi, Ibaraki 31 7-8 511, Japankenichihattori@pis.hitachi.co.jp, isao@keyaki.cc.u-tokai.ac.jp 3 Steel Research Laboratories, Nippon Steel Corp., 2 0-1 , Shintomi, ... Futtsu, Chiba 29 3- 8 511, Japanmogi@re.nsc.co.jp4Flat Products Division, Nippon Steel Corp., 6 -3 , Otemachi, 2-chome, Chiyoda-ku,Tokyo 10 0-8 071, Japan5Yawata Works, Nippon Steel Corp., 1-1 , Tobihatacho, ... AssessmentStudy of a 250MVA Air-CooledTurbo Generator”, International Electrical Machines and Drives Conference 20 03 (IEMDC 20 03) , June 1–4, 20 03, Madison, Wi.[4] K. Yamazaki,“StrayLoad Loss Analysisof InductionMotors...
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Recent Developments of Electrical Drives - Part 5 ppsx
... Roebelstabwick-lung, Dissertation, TU-Wien, 2003.[14] M.T. Holmberg, “Three-dimensional Finite Element Computation of Eddy Currents in Syn-chronous Machines”, Technical Report No. 350 , Department of ... with the expected values of this reactance. We think this is because the d-axisflux consist of the combine action of magnets, d-axis current and q-axis current. The effect of Iq can be magnetizing ... consequence, the internal voltage of the motor rises proportionally to the rotorS. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 25 37.C2006 Springer....
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Recent Developments of Electrical Drives - Part 9 pps
... University of Lodz, Poland,ul. Stefanowskiego 18/22, 9 0 -9 24 Lodz, Polandprembowski@poczta.onet.pl, apelikan@mail.p.lodz.plAbstract. The numerical model for three-dimensional field analysis of electrostatic ... with big asymmetries of the air gap in theelectrostatic microactuators, especially with ferroelectrics.S. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 73–83.C2006 ... the amplitude of the cogging torque. The slot-opening angle is less thanhalf a slot pitch τs.Assuming that the phase currents are function of the electrical rotor position θ (self-controlled...
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Recent Developments of Electrical Drives - Part 10 ppsx
... node i.j+n+1i+k+2j+njii+kj+n-ii+k-1j+n-2j-1j-2i-1i-2i+2i+1Figure 4. Part of the one level(z =const.) of the mesh with the overlappingregion(parts of electrodesdashed, dimensions ... enlarge)—symmetrical air gap.I-7. Analysis of Electrostatic Microactuators 77j+n+1i+k+2j+njii+kj+n-ii+k-1j+n-2j-1j-2i-1i-2i+2i+1Figure 5. Part of the one level(z =const.) of the mesh with ... model electrical machineswith high accuracy. For standard-type machines, two-dimensional field solution coupledS. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, ...
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Recent Developments of Electrical Drives - Part 11 pps
... magnitude of torque ripple by the use of a relatively simple time-domainmodel.S. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 93–100.C2006 Springer.I-8. Coupled ... extent of the effect of supplying a motor from a non-sinusoidal source [1–3]. Of these, methods which are basedon frequency domain analysis yield results which provide no interpretation of time-domainresults, ... can be effected by be-stowing“vector”attributesupon the time-variantelectromagneticquantities of the machine.Thus the sum of stator and rotor phase currents for a three-phase machine in space...
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Recent Developments of Electrical Drives - Part 13 ppsx
... KuligInstitute of Electrical Drives and Mechatronics, University of Dortmund,D-44227 Dortmund, Germany,arne.gruening@uni-dortmund.de, stefan.kulig@uni-dortmund.deAbstract. Numerical methods of calculating ... investigation, which was performed bya team of mechanical and electrical engineers over a period of about five years, concernedwith the development and coupling of three-dimensional numerical electromagnetic ... currentdistributions emulating the influence of the iron parts on the magnetic field, according toI-11. ELECTROMAGNETIC FORCES ANDMECHANICAL OSCILLATIONS OF THESTATOR END WINDING OF TURBOGENERATORSA. Gr¨uning...
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Recent Developments of Electrical Drives - Part 17 ppsx
... angle of anIPMSM as a function of in the case ofneglectingthe presence of multiple saliencies.In most estimators the influence of multiple saliencies on the current response is consid-ered ... period and the gains must be recalculated.S. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 155–164.C2006 Springer.156 Hanamoto et al.Thus, the experimental ... Teppei Fukuzawaand Teruo TsujiKyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 80 8-0 196, Japanhanamoto@life.kyutech.ac.jp, ahmad-ghaderi@edu.life.kyutech.ac.jp, tsuji@life.kyutech.ac.jpAbstract....
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Recent Developments of Electrical Drives - Part 26 pps
... theanalysis of an induction machine operation. Some exceptions in which linear cascade rotorS. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 247 260 .C2006 ... G.ˇStumberger11Faculty of Electrical Engineering and Computer Science, University of Maribor,Smetanova 17, SI-2000 Maribor, Sloveniadolinar@uni-mb.si2Ørsted DTU Automation, Technical University of Denmark, ... modulus of the magnetizing current vector. L represents the so-calleddynamic inductance, ψmdand ψmqare the d- and q-components of the magnetizing fluxlinkage vector Ψm, ρmis the angle of...
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Recent Developments of Electrical Drives - Part 28 pps
... Medynamics.Thankstothe predictiveabilities of motorpowerfeedforwardloop a betterdc-linkvoltagestabilization can be obtained. Also, fluctuations of dc-voltages may be reduced.Dc-link capacitor designIn AC/DC/AC ... there is no control of the dc-link voltage inparticular during transients (Fig. 10). So that, the size of the capacitor should be grater thanin a converter with PWM rectifier. A dc-link voltage control ... converter(Fig. 10). The behaviour of the dc-link voltage can be observed. From Fig. 9a it can be seenthat the overshoot in dc-link voltage is significantly bigger then for back-to-back converter(Fig. 10a).CONCLUSIONVirtual...
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Recent Developments of Electrical Drives - Part 39 pps
... stochastic wind. But, the integration of windS. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 385 396 .C2006 Springer.III-2.3. Maximum Wind Power Control in ... approach of control, we study the opti-mization of the quality of the energy produced in remote area by the wind diesel hybridsystem (stability of voltage and frequency). Increasing the life time of ... αVdc(19)Assuming negligible loss, the electrical power input equal to the electrical power output of the DC-DC buck converter, the average output current of the DC-DC buck converter isgiven by:VdcIdc=...
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Recent Developments of Electrical Drives - Part 42 ppsx
... use of much lessnumber of FE elements without significant accuracy loss, namely in the bar maximumtemperatures.S. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, ... thickcolor lines.III-3.1. EQUIVALENT THERMALCONDUCTIVITY OF INSULATINGMATERIALS FOR HIGH VOLTAGE BARSIN SLOTS OF ELECTRICAL MACHINESP.G. Pereirinha1,2and Carlos Lemos Antunes11ISR-Lab. CAD/CAE, ... the components of the heat flux density vectorF in the x, y, andz directions respectively.The case of the steady-state heat transfer problem, is described by the following partialdifferential...
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Recent Developments of Electrical Drives - Part 45 ppsx
... B-HCURVE AND TAKING INTO ACCOUNTZERO-SEQUENCE FLUXB. Kawkabani and J J. SimondLaboratory for Electrical Machines, Swiss Federal Institute of Technology,EPFL-STI-ISE-LME, ELG Ecublens, CH-1015 ... The size of elements must be small enough to provide sufficient accuracy. In this way the differentialS. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 443 450 .C2006 ... data Unand Inor Bn-Hn of a three-phase transfor mer(n = 0, 1, 2, 3, , N) is given. For the sake of making use of the Fourier series, a mirrorimage of this set of data is made about the...
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