Stress Analysis for Toroid-Type HTS SMES Coil and Bobbin Structure Considering Large Parallel Magnetic Field

Kim, Kwangmin; Lee, Sang-Jin; Kim, Seokho; Park, Minwon; Yu, In-Keun; Lee, Ji-Kwang; Lee, Seyeon; Choi, Kyeongdal; Seong, K.C.; Yeom, Hankil

doi:10.1109/tasc.2010.2094995

Cited by 14 publications

(6 citation statements)

References 8 publications

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“…Furthermore, in these motor configurations stresses due to elevated temperature distributions and magnetic force production are not investigated whereas in (7)- (11) it was shown that significant levels of stress can be present in coreless and iron-cored magnetic devices. The analysis of these stresses is often performed on a simplified geometry, either in 2-D (7) (8) (10) or in 3-D on small segments (9) (11) . However, these analyses types do not take complex arrangements of different regions nor curved sections into account.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic and Mechanical Performance of Direct and Indirectly Liquid-cooled Coreless Linear Motors with Multi-layer Coils

et al. 2018

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This paper conducts a comparison between direct and indirectly liquid-cooled topologies for coreless linear motors with multiple coil layers. The electromagnetic force production is obtained by 3-D magnetic scalar potential modeling whereas thermal modeling is performed by 3-D finite element and volume methods. The power dissipation and force density of each topology is investigated for different pole pitches and coil configurations. Subsequently, localization and comparison of the magnetic and thermal stresses is performed for both topologies. Furthermore, variations in the geometry are investigated to mitigate mechanical stresses.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic and Mechanical Performance of Direct and Indirectly Liquid-cooled Coreless Linear Motors with Multi-layer Coils

et al. 2018

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“…Recently, various kinds of high-temperature SMES (HTS-SMES) systems have been investigated [1]- [5]. The advantages of HTS-SMES systems are a quick response and a large capacity, whereas it is necessary to solve the problems about cooling condition [3], stability [4], stress [5], and so on.…”

Section: Introductionmentioning

confidence: 99%

“…The advantages of HTS-SMES systems are a quick response and a large capacity, whereas it is necessary to solve the problems about cooling condition [3], stability [4], stress [5], and so on. An ideal configuration of the HTS-SMES is a toroid composed by many superconducting coils [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Overturning Force Simulation on Normal-State Transition of Toroidal HTS-SMES Taking Into Account an Electromagnetic and Thermal Condition

Noguchi

Itoh

Oga

et al. 2014

IEEE Trans. Appl. Supercond.

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Abstract-Recently, many investigations about toroidal hightemperature superconducting magnetic energy storage systems have been reported. Some papers reported that there was a possibility that the chain of normal-state transitions occurred on the toroidal HTS-SMES magnet by normal-state-transition simulation. Hence, it should also be investigated that the behavior of unbalanced electromagnetic force during the sequential normal-state transition of the superconducting coil elements. In this paper, we have developed a simulation code to investigate the behavior of the overturning electromagnetic force on the toroidal HTS-SMES system during the normal-state transition. The magnetic field and the circuit analysis were coupled and solved in the previously developed simulation code. Additionally, in order to investigate the normal-state transition more accurately, we also take the thermal analysis into account. Carrying out the newly developed numerical simulation, we investigate the time transition of the transport current, the overturning force, and the magnetic field applied to the superconducting coil elements for a few toroidal HTS-SMESs.  Index Terms-Electromagnetic force, HTS-SMES, thermal analysis, superconducting magnet.

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“…A CCORDING to the successful development of HTS conductors, they are widely used for the applications of various electric power machineries such as motor, generator, SMES (Superconducting Magnetic Energy Storage) and so on [1]- [4]. Especially, ReBCO HTS conductor, which is called coated conductor, is now replacing the Bi2223 HTS conductors due to its S. Lee is with Uiduk University, Gyeongju 801-713, Korea (e-mail: sangjin03@gmail.com).…”

Section: Introductionmentioning

confidence: 99%

De-Lamination Characteristics of Coated Conductor for Conduction Cooled HTS Coil

Jeong

Park

Kim

et al. 2012

IEEE Trans. Appl. Supercond.

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According to the continuous development of coated conductors and compact cryocoolers, research and development efforts for High Temperature Superconducting (HTS) magnets are increasing using conduction cooling method. To increase the cooling efficiency and thermal stability of the HTS magnet, the coated conductor is wound by wet-winding or epoxy impregnating in vacuum after dry-winding. Due to the large Lorentz force and thermal contraction, stress analysis of the composite material, which is composed of HTS conductor, insulation layer and epoxy layer, is necessary to assure the mechanical stability of the HTS magnets.Mechanical strength for a/b axis, which is parallel to the conductor surface, is usually strong enough to endure the large tensile stress due to the tough substrate material. However, c-axis strength, which is perpendicular to the conductor surface, is not strong enough to ensure the large Lorentz force. The de-lamination of the multi-layered HTS tape in a coil structure can occur and the results were previously reported. Therefore, the test data for allowable c-axis strength is necessary to design the mechanical stability of the HTS coil. This paper describes the experimental results for the c-axis tensile strength of various coated conductors. The results show the wide divergence of the c-axis tension force from 18 MPa to 53 MPa. Through the FEM analysis for multi-layered structure of the HTS tape, concept design for HTS tape of enhanced c-axis strength is suggested.

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Stress Analysis for Toroid-Type HTS SMES Coil and Bobbin Structure Considering Large Parallel Magnetic Field

Cited by 14 publications

References 8 publications

Electromagnetic and Mechanical Performance of Direct and Indirectly Liquid-cooled Coreless Linear Motors with Multi-layer Coils

Electromagnetic and Mechanical Performance of Direct and Indirectly Liquid-cooled Coreless Linear Motors with Multi-layer Coils

Overturning Force Simulation on Normal-State Transition of Toroidal HTS-SMES Taking Into Account an Electromagnetic and Thermal Condition

De-Lamination Characteristics of Coated Conductor for Conduction Cooled HTS Coil

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