Recent Developments of Electrical Drives - Part 8 pdf

... 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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... node i. j+n+1 i+k+2 j+n j i i+k j+n-i i+k-1 j+n-2 j-1 j-2 i-1 i-2 i+2 i+1 Figure 4. Part of the one level(z =const.) of the mesh with the overlappingregion(parts of electrodes dashed, dimensions ... enlarge)—symmetrical air gap. I-7. Analysis of Electrostatic Microactuators 77 j+n+1 i+k+2 j+n j i i+k j+n-i i+k-1 j+n-2 j-1 j-2 i-1 i-2 i+2 i+1 Figure 5. Part of the one level(z =co...

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... magnitude of torque ripple by the use of a relatively simple time-domain model. S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 93–100. C  2006 Springer. I-8. Coupled ... extent of the effect of supplying a motor from a non-sinusoidal source [1–3]. Of these, methods which are based on frequency domain analysis yield results which provide no...

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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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... Kulig Institute of Electrical Drives and Mechatronics, University of Dortmund, D-44227 Dortmund, Germany, arne.gruening@uni-dortmund.de, stefan.kulig@uni-dortmund.de Abstract. Numerical methods of calculating ... investigation, which was performed by a team of mechanical and electrical engineers over a period of about five years, concerned with the development and coupling of...

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... al. -8 -7 -6 -5 -4 -3 -2 -1 0 0 0,05 0,1 0,15 0,2 measured calculated times [s]voltage [V] Figure 13. The voltage induced in open winding vs. time at DC voltage value 63.05 V. -1 9 -1 7 -1 5 -1 3 -1 1 -9 -7 -5 -3 -1 1 0 ... Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 275–289. C  2006 Springer....

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