Recent Developments of Electrical Drives - Part 16 potx
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 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...
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 End
Winding of Turbo Generators
A. G...
Recent Developments of Electrical Drives - Part 2 docx
... (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-...
Recent Developments of Electrical Drives - Part 3 ppt
... 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,...
Recent Developments of Electrical Drives - Part 4 ppt
... 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...
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-axis
flux consist of the combine action of magnets, d-axis current and q-axis current. The effect
of I...
Recent Developments of Electrical Drives - Part 6 doc
... 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...
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 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...
Recent Developments of Electrical Drives - Part 8 pdf
... 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...
Recent Developments of Electrical Drives - Part 9 pps
... 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...
Recent Developments of Electrical Drives - Part 10 ppsx
... 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...
Recent Developments of Electrical Drives - Part 16 potx
... (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-...
Recent Developments of Electrical Drives - Part 33 potx
... 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...
Recent Developments of Electrical Drives - Part 41 potx
... 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...
Recent Developments of Electrical Drives - Part 43 potx
... 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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