Recent Developments of Electrical Drives - Part 25 pot

... 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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... presented a view of one of these motors. I-12. Optimization of Linear Brushless DC Motor Drive 135 -0 .01 -0 .008 -0 .006 -0 .004 -0 .002 0 0.002 0.004 0.006 0.008 0.01 -8 -6 -4 -2 0 2 4 6 8 x 10 -3 Figure ... efficiency is about 50% if it is assumed that the joule losses are predominant. -1 -0 .5 0 0.5 1 -1 -0 .8 -0 .6 -0 .4 -0 .2 0 0...

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... (eds.), Recent Developments of Electrical Drives, 141–153. C  2006 Springer. II-1. High-Frequency Position Estimators 143 Figure 1. Magnetizing characteristicwith i mo and φ mo the average modulusof ... and Ren´e K. Boel Electrical Energy Laboratory (EELAB), Department of Electrical Energy, Systems and Automation (EESA), Ghent University (UGent), Sint-Pietersnieuwstraat 41, B-...

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... torque-speed en- velope with maximum-torque-per-stator-current operation range below the base speed as well as constant-powerflux-weakening andmaximum-torque-per-stator-flux operationregions above thebase speed. ... fol- lows. In “IPMSM Design for Wide-Speed Operation,” the double-layer IPM-rotor de- sign is adopted for IPMSMs requiring a wide torque-speed envelope. In “DTC of VSI- fed IPMSM...

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... location of the maximal tooth excitation de- pends on the direction of rotation. In case of right-hand rotation the highest excitation S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical ... II-7. COMPARISON OF STATOR- AND ROTOR-FORCE EXCITATION FOR THE ACOUSTIC SIMULATION OF AN INDUCTION MACHINE WITH SQUIRREL-CAGE ROTOR C. Schlensok and G. Henneberger I...

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... excitations Type of excitation Rotational direction Stator-teeth Left-hand Rotor-teeth Right-hand Stator-teeth Right-hand Rotor- and stator-teeth Right-hand values are positioned on the side of the mounting-plate. ... Deformation of the entire machine in the case of pure stator-teeth excitation, real part. II-7. Comparison of Stator- and Rotor-Force Excitation 221 Figure 14. Struc...

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... results: modes 2-2 D, 3-2 D, 4-2 D and modes 2-3 D, 3-3 D, 4-3 D. Table 4. Results for the sleek cylinders Natural frequencies (Hz) Mode Analytical laws FE Software Analogies Hammer test Cyl 1 2-2 D 2,244 ... 2,095 2,280 2-3 D x 2,808 x 2,740 3-2 D 6,208 6,169 6,395 6,280 3-3 D x 7,155 x 6,930 Cyl 2 2-2 D 756 824 799 742.6 2-3 D x 1,454 x 1,350 3-2 D 2,102 2,2...

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... made over iron mostly. S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 321 334 . C  2006 Springer. III-1.3. Axial Flux Surface Mounted PM Machine 323 way, radial ... range of airgap flux control to reduce or increase its value, this is made with low requirement of d-axis current. r This particular configuration allows us to control the level of e...

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... Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 361 373 . C  2006 Springer. III-2.1. Performance Analysis of DFTSCIG 363 Therefore,the mechanical frequencyof the shaft of the machineinhertz ... development of several alternatives of gearless electrical generators that operate at variable speeds. One of these alternatives consists of a Doubly Fed Twin stator...

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... the effective value of the e.m.f. using a full-pitch winding. The result will be also an increase of the harmonic content of the e.m.f. The ideal e.m.f. waveform is an 120 electrical degrees trapezoidal ... control of thegenerator, Grid Power Converter Figure 1. Direct-drive wind turbine system with PM synchronous generator. Figure 2. Generator’s topology. Figure 3. The back-to-back...

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... the stator cooling area is the same such as the warming of coils. The power-to-weight ratio of trapezoidal waveform machines is 28% higher than sinu- soidal machine but the magnets weight is 50% higher ... level of torque ripple is obtained for a magnet width equal to 90% of the pole pitch (Fig. 19). The trapezoidal waveform machine has 150% of the magnets volume but only 48% of t...

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... samples. 0,0E+00 2,0E-05 4,0E-05 6,0E-05 8,0E-05 1,0E-04 1,2E-04 1,4E-04 1,6E-04 1,8E-04 2,0E-04 1A 1B 2 3 4 5 AC-loss slope Meas slope 1.0*Cond FEM slope 1.0*Cond FEM slope 1.2*Cond Figure 11. AC-slopes—ring ... modifications. S. Wiak, M. Dems, K. Kom ˛ eza (eds.), Recent Developments of Electrical Drives, 423 433 . C  2006 Springer. III-3.2. Loss Calculations for Soft Magnetic Com...

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