Recent Developments of Electrical Drives - Part 14 pptx
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 8 pdf
... KolehmainenTable 2. Comparison of nominal load resultsMeasured Calculated Calculated CalculatedV-shape V-shape U-shapeA U-shapeBTn[Nm] 87 5 87 5 87 5 87 5In[A] 46.5 45.5 45 .8 45.4Cosω0.993 0.997 ... 45.4Cosω0.993 0.997 0.997 1.000η0.929 0.946 0.939 0.9 38 Angle 32.6 29.7 25.4Tk[Nm] 1, 688 1,557 1,4 18 Ik[A] 122.5 113 .8 98. 5Cosω0 .85 6 0 .84 1 0 .80 4Angle 114.1 111.5 99.2Magnets thickness 7.3 ... with V-shape than with U-shapeA design, because the mag-netic structure of rotor. By comparing torques of U-shapeA and U-shapeB designs can alsosee the effect of decreasing of magnet thickness.Reluctanceand...
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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 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 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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