Recent Developments of Electrical Drives - Part 12 docx

... 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 459 Table 3. Comparison of results case of unsymmetrical ... i A in the case of no-load. Figure 7. Computed and measured primary current i B in the case of no-load. Figure 8. Computed and measured primary current i C in the case of no...

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... 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 End Winding of Turbo Generators A. G...

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... (eds.), Recent Developments of Electrical Drives, 1 2. C  20 06 Springer. 2 Introductory Remarks harmonics in PM motors. The technique that consists on the choice of an appropriate number of magnet ... insure ex- tended torque-speed envelope with maximum-torque-perstator-current operation range below the base speed as well as constant-power flux-weakening and maximum-torque-...

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... Hitachi Ltd., 3- 1 -1 , Saiwaicho, Hitachi, Ibaraki 31 7-8 511, Japan kenichi hattori@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, Japan mogi@re.nsc.co.jp 4 Flat Products Division, Nippon Steel Corp., 6 -3 , Otemachi, 2-chome, Chiyoda-ku, Tokyo 10 0-8 071, Japan 5 Yawata Works,...

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... Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 13–23. C  2006 Springer. I-2. Losses in Large Hydro-generators 15 By defining the N-dimensional vector o T = (1 1) we ... no-load losses of largesynchronous machines withsalient poles. Asshown in Fig. 4, aset of various machines is taken into account. Optimization of theno-load electromagnetic losses...

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... 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-axis flux consist of the combine action of magnets, d-axis current and q-axis current. The effect of I...

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... Wave data has been collected S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 39–49. C  20 06 Springer. 42 Mueller et al. F gen F wave x(t) (i,x) desire d Î i(t) Generator ... emulator. 36 P´erez-Donsi´on Figure 17. Graphic representation of the magnets and reluctance torques vs. time during a sudden decrease of the load. we can defined it like...

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... 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 45 150 100 50 -5 0 -1 00 -1 50 0 ... densities of V-shape and U-shapeA designs produced only by magnets in the stator teeth with different rotor angles. Figure 9. Total three-phase output power. 4000 3000...

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... Kolehmainen Table 2. Comparison of nominal load results Measured Calculated Calculated Calculated V-shape V-shape U-shapeA U-shapeB T n [Nm] 87 5 87 5 87 5 87 5 I n [A] 46.5 45.5 45 .8 45.4 Cos ω 0.993 0.997 ... 45.4 Cos ω 0.993 0.997 0.997 1.000 η 0.929 0.946 0.939 0.9 38 Angle 32.6 29.7 25.4 T k [Nm] 1, 688 1,557 1,4 18 I k [A] 122.5 113 .8 98. 5 Cos ω 0 .85 6 0 .84 1 0 .80 4 Angl...

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... University of Lodz, Poland, ul. Stefanowskiego 18/22, 9 0 -9 24 Lodz, Poland prembowski@poczta.onet.pl, apelikan@mail.p.lodz.pl Abstract. The numerical model for three-dimensional field analysis of electrostatic ... with big asymmetries of the air gap in the electrostatic microactuators, especially with ferroelectrics. S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of...

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... 0.1 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 T el [Nm] t [s] Figure 5. Torque ripple at full load (simulated). I-10. Permanent Magnet Synchronous Machine 103 0 10 20 30 40 50 60 70 80 90 -1 -0 .8 -0 .6 -0 .4 -0 .2 0 0.2 0.4 0.6 0.8 1 Amplitude ... data-processing tool MATLAB R  , making possible the determination of fast and simple prediction models of the acoustic nois...

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... the other S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 165–176. C  2006 Springer. II-3. Sensorless Rotor-Flux-Oriented Control Scheme 171 Figure 6. Global estimation ... Fernandez 2 1 University of M´alaga, Electrical Engineering Department, Plaza El Ejido S/N 29013 Malaga, Spain mjduran@uma.es, jlduran@uma.es, fmperez@uma.es 2 University of...

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... (eds.), Recent Developments of Electrical Drives, 187 200 . C  200 6 Springer. 182 Muntean et al. low speed, have been recently reported [11,12]. The initial angular position of the stator flux-linkage ... flux-linkage has been derived to be used in IPMSM DTC insuring maximum-torque-per-stator-current operation below the base speed as well as constant-power flux-weakening and maximu...

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... V. 0,0E+0 5,0E-5 1,0E-4 1,5E-4 2,0E-4 2,5E-4 3,0E-4 0 0,002 0,004 0,006 0,008 0,01 resistance [ Ω] time [s] Figure 23. Equivalent resistance of the rotor bar vs. time. 0,0E+0 1,0E-7 2,0E-7 3,0E-7 4,0E-7 5,0E-7 6,0E-7 0 ... sizing. Generally, capability of steel-cored S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 295 306 . C  2006 Springer. II-1...

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... approachwhichleads toa betterintegration ofspeed reducingfunctions in electric drives, the emergence of new needs to satisfy specifications of the high-effort-at- low-speed type,under moreand more severe ... Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 435 442 . C  2006 Springer. III-3.3. Electroactive Materials: Toward Novel Actuation Concepts 441 Figu...

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