In the current paper, studies carried out to design an eight pole electromagnetic bearing have been presented. The magnetic levitation force, accounting the copper and iron losses, was maximized for the given geometric constraints. Derivation of winding constraint equation in terms of wire diameter, number of turns, and dimensions of pole has been presented. Experiments were conducted to establish the constraints related to temperature rise. Finally, the dimensions of the electromagnet for maximizing the force obtained using numerical optimization have presented.

Issue Section:
Technical Brief
Keywords:
Bearing design, Magnetic bearings
Topics:
Electromagnets, Magnetic bearings, Optimization, Poles (Building), Temperature, Winding (process), Wire, Stators, Copper, Iron

References

1.
Sahinkaya
,
M. N.
,
Abulrub
,
A. H. G.
,
Keogh
,
P. S.
, and
Burrows
,
C. R.
,
2007
, “
Multiple Sliding and Rolling Contact Dynamics for a Flexible Rotor/Magnetic Bearing System
,”
IEEE/ASME Trans. Mechatronics
,
12
(
2
), pp.
179
–
189
.10.1109/TMECH.2007.892827
Google Scholar
Crossref
Search ADS
 
2.
Noh
,
M. D.
,
Cho
,
S. R.
,
Kyung
,
J. H.
,
Ro
,
S. K.
, and
Park
,
J. K.
,
2005
, “
Design and Implementation of a Fault-Tolerant Magnetic Bearing System for Turbomolecular Vacuum Pump
,”
IEEE/ASME Trans. Mechatronics
,
10
(
6
), pp.
626
–
631
.10.1109/TMECH.2005.859830
Google Scholar
Crossref
Search ADS
 
3.
Williams
,
R. D.
,
Keith
,
F. J.
, and
Allaire
,
P. E.
,
1990
, “
Digital Control of Active Magnetic Bearings
,”
IEEE Trans. Ind. Electron.
,
37
(
1
), pp.
19
–
27
.10.1109/41.45839
Google Scholar
Crossref
Search ADS
 
4.
Schweitzer
,
G.
, and
Maslen
,
H.
,
2009
,
Magnetic Bearings: Theory, Design, and Application to Rotating Machinery
,
Springer-Verlag
,
Berlin, Germany
.
5.
Chang
,
H.
, and
Chung
,
S. C.
,
2002
, “
Integrated Design of Radial Active Magnetic Bearing Systems Using Genetic Algorithms
,”
Mechatronics
,
12
(
1
), pp.
19
–
36
.10.1016/S0957-4158(00)00068-4
Google Scholar
Crossref
Search ADS
 
6.
Hsiao
,
F. Z.
,
Fan
,
C. C.
,
Chieng
,
W. H.
, and
Lee
,
A. C.
,
1996
, “
Optimum Magnetic Bearing Design Considering Performance Limitations
,”
JSME Int. J. Ser. C
,
39
(
3
), pp.
586
–
596
.10.1299/jsmec1993.39.586
7.
Shelke
,
S.
, and
Chalam
,
R. V.
,
2011
, “
Optimum Energy Loss in Electromagnetic Bearing
,”
3rd International Conference on Electronics Computer Technology (ICECT)
, Kanyakumari, India, Apr. 8–10, pp.
374
–
379
.
8.
Bakay
,
L.
,
Dubois
,
M.
,
Viarouge
,
P.
, and
Ruel
,
J.
,
2009
, “
Losses in an Optimized 8-Pole Radial Magnetic Bearing for Long Term Flywheel Energy Storage
,”
International Conference on Electrical Machines and Systems
,” Tokyo, Japan, Nov. 15–18, pp.
1
–
6
.
9.
Yunus
,
C. A.
,
2011
,
Heat and Mass Transfer: Fundamentals and Applications
,
Tata McGraw-Hill
,
New Delhi, India
.
10.
Yanhua
,
S.
, and
Lie
,
Y.
,
2002
, “
Analytical Method for Eddy Current Loss in Laminated Rotors With Magnetic Bearing
,”
IEEE Trans. Magn.
,
38
(
2
), pp.
1341
–
1347
.10.1109/20.996021
Google Scholar
Crossref
Search ADS
 
11.
Saito
,
T.
,
Takemoto
,
S.
, and
Iriyama
,
T.
,
2005
, “
Resistivity and Core Size Dependencies of Eddy Current Loss for Fe–Si Compressed Cores
,”
IEEE Trans. Magn.
,
41
(
10
), pp.
3301
–
3303
.10.1109/TMAG.2005.854905
Google Scholar
Crossref
Search ADS
 
12.
Boldea
,
I.
, and
Nasar
,
A. S.
,
2002
,
The Induction Machine Handbook
,
CRC
,
Boca Raton, FL
.10.1201/9781420042658
Copyright © 2015 by ASME
You do not currently have access to this content.