Ryota Sato
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Ryota Sato has a total of 7 co-authors. Here are the top co-authors by number of shared publications:
- Daisuke Miyagi
Department of Electrical and Electronic Engineering, Chiba University, Chiba, Japan
2 shared publications Hideo Saotome
Department of Electrical and Electronic Engineering, Chiba University, Chiba, Japan
2 shared publications- Hiroyasu Kobayashi
Department of Electrical and Electronic Engineering, Chiba University, Chiba, Japan
2 shared publications - Makoto Tsuda
Department of Electrical Engineering, Graduate School, Tohoku University, Sendai, Japan
2 shared publications - Kichizo Abe
Department of Electrical and Electronic Engineering, Chiba University, Chiba, Japan
1 shared publication Takataro Hamajima
Graduate School of Engineering, Tohoku University, Miyagi, Japan
1 shared publication
Latest Publications
- 6 February 2024
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 34 (5) , 1-5
Investigation of the Relationship Between Unbalanced Current Distribution and Twist Pitches in Cable-in-Conduit Conductors
Unbalanced current distribution in cable-in-conduit conductors (CICCs) is a phenomenon that shows the dependence of stability performance on the ramp rate (ramp-rate limitation) in fusion magnets. In this study, we investigated the effect of the twist pitches of the cable stages in a CICC on the current distribution among its strands. We calculated the self-inductance of each strand and the mutual inductance between strands based on a geometrical model that analytically computes the strand's trajectory. Then, we created an equivalent circuit model and calculated the current distribution in the CICC. The current distribution was analyzed for CICCs with different twist pitch configurations. The result shows that combining the cabling stage twist pitches affects the current distribution.
- 6 February 2024
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 34 (5) , 1-5
Investigation of the Relationship Between Unbalanced Current Distribution and Twist Pitches in Cable-in-Conduit Conductors
Unbalanced current distribution in cable-in-conduit conductors (CICCs) is a phenomenon that shows the dependence of stability performance on the ramp rate (ramp-rate limitation) in fusion magnets. In this study, we investigated the effect of the twist pitches of the cable stages in a CICC on the current distribution among its strands. We calculated the self-inductance of each strand and the mutual inductance between strands based on a geometrical model that analytically computes the strand's trajectory. Then, we created an equivalent circuit model and calculated the current distribution in the CICC. The current distribution was analyzed for CICCs with different twist pitch configurations. The result shows that combining the cabling stage twist pitches affects the current distribution.
- 21 February 2023
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 33 (5) , 1-5
Influence of the Relative Position of Conductors Constituting Each Phase on the AC Loss in a Three-Phase Coaxial HTS Cable
Three-phase coaxial high-temperature superconducting (HTS) cables have three layers, and HTS conductors are arranged circularly in each layer. Since each arranged conductor transports current, the conductor arrangement determines the magnetic field distribution inside the cable. In addition, the AC loss varies depending on the conductor arrangement because the magnitude of the perpendicular magnetic field on each conductor determines the AC loss of the cable. Therefore, it is essential to consider the optimal conductor arrangement in cable design. In this study, we investigated the influence of the relative position of the conductors constituting each phase on the AC losses. The conductors constituting the cable were Y-based superconducting conductors, and the AC losses were calculated by one-dimension finite element analysis of the T-method. The calculation results show that shortening the gap between conductors in the radial direction reduces the AC loss. Furthermore, we have shown that simultaneously shortening the circumferential and radial gap between conductors can significantly reduce AC losses. In addition, the cost estimation shows that it is essential to consider a conductor arrangement with low AC losses in cable design.
- 21 February 2023
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 33 (5) , 1-5
Influence of the Relative Position of Conductors Constituting Each Phase on the AC Loss in a Three-Phase Coaxial HTS Cable
Three-phase coaxial high-temperature superconducting (HTS) cables have three layers, and HTS conductors are arranged circularly in each layer. Since each arranged conductor transports current, the conductor arrangement determines the magnetic field distribution inside the cable. In addition, the AC loss varies depending on the conductor arrangement because the magnitude of the perpendicular magnetic field on each conductor determines the AC loss of the cable. Therefore, it is essential to consider the optimal conductor arrangement in cable design. In this study, we investigated the influence of the relative position of the conductors constituting each phase on the AC losses. The conductors constituting the cable were Y-based superconducting conductors, and the AC losses were calculated by one-dimension finite element analysis of the T-method. The calculation results show that shortening the gap between conductors in the radial direction reduces the AC loss. Furthermore, we have shown that simultaneously shortening the circumferential and radial gap between conductors can significantly reduce AC losses. In addition, the cost estimation shows that it is essential to consider a conductor arrangement with low AC losses in cable design.