Recent Developments of Electrical Drives - Part 3 ppt
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 4 ppt
... Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 13–23.C2006 Springer.I-2. Losses in Large Hydro-generators 15By defining the N-dimensional vector oT= (1 1) we ... no-load losses of largesynchronous machines withsalient poles. Asshown in Fig. 4, aset of various machinesis taken into account.Optimization of theno-load electromagnetic lossesThe aim of ... models for the calculation of P3, P8, and P9.I-2. Losses in Large Hydro-generators 19Speed/rpm800600 40 020000 100 200 300 40 0Rated output/MVAFigure 4. Range of reference and test machines...
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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 6 doc
... Wave data has been collectedS. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 39–49.C20 06 Springer.42 Mueller et al.FgenFwavex(t)(i,x)desiredÎi(t)Generator ... emulator. 36 P´erez-Donsi´onFigure 17. Graphic representation of the magnets and reluctance torques vs. time during a suddendecrease of the load.we can defined it like a set of critical combinations of ... Graphic representation of the torque of the squirrel cage vs. time for a sudden decrease of the load.I-3. Coupled Model for PMSM 35Figure 15. Graphic representation of the torque of the squirrel cage...
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Recent Developments of Electrical Drives - Part 7 ppt
... magnets.Figure 2. 12-pole PM motor design with magnets in V-shape.Figure 3. 12-pole PM motor design with magnets in U-shape in every second pole.I-4. Dynamic Modeling of VHM 4515010050 -5 0 -1 00 -1 500 ... densities of V-shape and U-shapeA designs produced only by magnets in the statorteeth with different rotor angles.Figure 9. Total three-phase output power.40003000200010000 -1 000 -2 000 -3 000 -4 000510152025Force ... experimentalresults of V-shape design. It can be seen that calculation of V-shape design gives a correctFigure 6. Packing of flux with nominal load and new design A (U-shapeA).I-5. FINITE ELEMENT ANALYSIS OF...
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Recent Developments of Electrical Drives - Part 14 pptx
... themiddle of the involute part of the upper layer bar of the first coil of phase a of the two-polegenerator, which has to sustain the largest electromagnetic forces during the three-phaseterminal ... Institute of Electrical Machines and Drives: University of Hannover, 1996.[4] B. Frei-Spreiter,Ein BeitragzurBerechnung derKr¨afteimWickelkopfbereichgroßerSynchron-maschinen, Instituteof Electrical ... Erweiterung eines Finite-Differenzen-Zeitschritt-Programmsystems auf Syn-chronmaschinen, Institute for Electrical Machines, Drives and Power Electronics: University of Dortmund, 1997....
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Recent Developments of Electrical Drives - Part 21 ppt
... effect ofmagnetostriction and stress-dependentmagnetostrictionon the vibrations of an induction motor.S. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 201 210 .C2006 ... 0.760II-6. EFFECT OF STRESS-DEPENDENTMAGNETOSTRICTION ON VIBRATIONS OF AN INDUCTION MOTORA. BelahcenLaboratory of Electromechanics, Helsinki University of Technology, P.O. Box 3000,FIN-02015 ... dynamic systems with voltage-supply.The goal of this study is to establish the effect of magnetostriction and magnetoelasticcoupling on thevibrations and noise of rotating electrical machines.Results...
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Recent Developments of Electrical Drives - Part 24 ppt
... Kom˛eza (eds.), Recent Developments of Electrical Drives, 225–236.C2006 Springer.II-7. Comparison of Stator- and Rotor-Force Excitation 223The results show that the direction of the rotation ... sound.ConclusionIn this paper the structure- and air-borne noise of an induction machine with squir rel-cagerotor are estimated.Forthis, different types of surface-forceexcitationsand rotational directions ... general the calculated structure-borne sound-levels suit the accelerationmeasurementsoftheindustrialpartnerverywell.Theacoustic-noise levelsdifferfromthose.The comparison of the different excitations...
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Recent Developments of Electrical Drives - Part 27 ppt
... better control of the power flow the fluctuation of the dc-link voltages will bedecrease. So the size of the dc-link capacitor can be reduced.II-10. Impact of Magnetic Saturation of Induction Motor ... saturation modelling in d-q axis models of inductionmachines, IEEE Trans. Energy Convers., Vol. 10, No. 3, pp. 455–461, 1995.[4] E. Levi, Impact of cross-saturation on accuracy of saturated induction ... step changes of the load torque are applied on260 Dolinar et al.AcknowledgmentThis work was supported in part by the Slovene Ministry of Education, Science and Sport,Project No. P 2-0 115.References[1]...
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Recent Developments of Electrical Drives - Part 31 ppt
... disposition);S. Wiak, M. Dems, K. Kom˛eza (eds.), Recent Developments of Electrical Drives, 307–320.C2006 Springer.III-1.1. Design and Manufacturing of Steel-Cored PMLSM 301Figure 6. Optimal design ... validity of sets of the design variables underIII-1.1. Design and Manufacturing of Steel-Cored PMLSM 305Figure 11. Running characteristics of designed motor.Figure 12. Current-thrust force curve.Figure ... inverted connection of coils belonging to adjacent teeth of the same phase (contro-verse coils).By adopting the representation of Fig. 1 (right) to specify the winding sense of each coilaround...
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Recent Developments of Electrical Drives - Part 32 pptx
... winding;rthe no. of teeth/cycle Ntcand the no. of coils/cycle Nccmust be multiple of the no. of phases Nph;rlinks about no. of teeth/cycle-phase Ntcphand no. of coils/cycle-phase Nccph:Ntc=NphNtcph;Ncc= ... e.m.f.It is particularly noticeable the absolute absence of slotting effects, in spite of the verylow no. of slots/(pole-phase). The phase-to-neutral e.m.f. is almost sinusoidal: in fact, theharmonic ... Nccph:Ntc=NphNtcph;Ncc= NphNccph;rin case of controverse coils, the no. of coils/cycle-phase Nccphcoincides with the no. of teeth/cycle-phase Ntcph;rthe optimal no. of PMs/cycle Nmcdiffers by one...
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Recent Developments of Electrical Drives - Part 35 pptx
... “Comparison Between a Novel Claw-Pole Electrically Mag-netized Synchronous Machine Without Slip-Rings and a Permanent Magnet Machine”, IEEEInternational ElectricalMachines and DrivesConference, Madison, ... outer cylindrical surface of the yoke. The whole surface area of the end-plateswas used to cool the copper losses of the d.c. winding (“Pcu2”) and the iron losses of theend-plates, and they were ... 347[8] A. Arkkio, “Thermal Analysis of High-Speed Electrical Machines”, Postgraduate Seminaron Electromechanics, Laboratory of Electromechanics, Helsinki University of Technology,Finland, May 2002.[9]...
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