Abstract
We discuss some of the main considerations involved in the design of HTS coils to operate in liquid nitrogen and provide ampere-turns for magnetic circuits in general, and then in particular for a small-scale electromagnetic (i.e. attractive) maglev demonstrator. The most important factor affecting design is the sensitive and strongly anisotropic dependence of HTS tape's critical current on magnetic field. Any successful design must limit the field in the windings, especially components perpendicular to the tape's surface (radial components in the case of solenoids), to acceptably low levels such that local critical currents nowhere fall below the operating current. This factor is relevant to the construction of HTS coils for all applications. A second important factor is that the presence of an iron magnetic circuit can greatly alter the flux distribution within the coils from that found when they are in free space. FE modelling has been used to calculate accurate field profiles in proposed designs for comparison with short sample Ic(B) data. We present a design for a maglev demonstrator, illustrating how some of the problems, in particular the reduction of radial field components, may be addressed, and describe its predicted performance.
| Original language | English |
|---|---|
| Pages (from-to) | 2683-2686 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 32 |
| Issue number | 4 PART 2 |
| DOIs | |
| Publication status | Published - 1 Jul 1996 |
| Externally published | Yes |
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Designing HTS Coils for Magnetic Circuits. / Jenkins, Richard G.; Jones, Harry; Goodall, Roger M.
In: IEEE Transactions on Magnetics, Vol. 32, No. 4 PART 2, 01.07.1996, p. 2683-2686.Research output: Contribution to journal › Article
TY - JOUR
T1 - Designing HTS Coils for Magnetic Circuits
AU - Jenkins, Richard G.
AU - Jones, Harry
AU - Goodall, Roger M.
PY - 1996/7/1
Y1 - 1996/7/1
N2 - We discuss some of the main considerations involved in the design of HTS coils to operate in liquid nitrogen and provide ampere-turns for magnetic circuits in general, and then in particular for a small-scale electromagnetic (i.e. attractive) maglev demonstrator. The most important factor affecting design is the sensitive and strongly anisotropic dependence of HTS tape's critical current on magnetic field. Any successful design must limit the field in the windings, especially components perpendicular to the tape's surface (radial components in the case of solenoids), to acceptably low levels such that local critical currents nowhere fall below the operating current. This factor is relevant to the construction of HTS coils for all applications. A second important factor is that the presence of an iron magnetic circuit can greatly alter the flux distribution within the coils from that found when they are in free space. FE modelling has been used to calculate accurate field profiles in proposed designs for comparison with short sample Ic(B) data. We present a design for a maglev demonstrator, illustrating how some of the problems, in particular the reduction of radial field components, may be addressed, and describe its predicted performance.
AB - We discuss some of the main considerations involved in the design of HTS coils to operate in liquid nitrogen and provide ampere-turns for magnetic circuits in general, and then in particular for a small-scale electromagnetic (i.e. attractive) maglev demonstrator. The most important factor affecting design is the sensitive and strongly anisotropic dependence of HTS tape's critical current on magnetic field. Any successful design must limit the field in the windings, especially components perpendicular to the tape's surface (radial components in the case of solenoids), to acceptably low levels such that local critical currents nowhere fall below the operating current. This factor is relevant to the construction of HTS coils for all applications. A second important factor is that the presence of an iron magnetic circuit can greatly alter the flux distribution within the coils from that found when they are in free space. FE modelling has been used to calculate accurate field profiles in proposed designs for comparison with short sample Ic(B) data. We present a design for a maglev demonstrator, illustrating how some of the problems, in particular the reduction of radial field components, may be addressed, and describe its predicted performance.
KW - high temperature superconductors
KW - coils
KW - magnetic circuits
KW - Magnetic levitation
KW - critical current
KW - iron
KW - magnetic liquids
KW - nitrogen
KW - anisotropic magnetoresistance
KW - magnetic fields
UR - http://www.scopus.com/inward/record.url?scp=0030192275&partnerID=8YFLogxK
U2 - 10.1109/20.511427
DO - 10.1109/20.511427
M3 - Article
VL - 32
SP - 2683
EP - 2686
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 4 PART 2
ER -