A5075302091- Magnetic Bearings and Levitation Dynamics
- Superconducting Materials and Applications
- Electric Motor Design and Analysis
- Magnetic Properties and Applications
- Physics of Superconductivity and Magnetism
- Particle accelerators and beam dynamics
- Sensorless Control of Electric Motors
- Magnetic confinement fusion research
- Superconductivity in MgB2 and Alloys
- Ionosphere and magnetosphere dynamics
Boston Fusion (United States)
2023
Plasma Technology (United States)
2023
Fusion Academy
2023
Fusion (United States)
2023
University of North Carolina at Charlotte
2012-2017
The SPARC Toroidal Field Model Coil (TFMC) Program was a three-year effort between 2018 and 2021 that developed novel Rare Earth Barium Copper Oxide (REBCO) superconductor technologies then successfully utilized these to design, build, test first-in-class, high-field (∼20 T), representative-scale (∼3 m) superconducting toroidal field (TF) coil. program executed jointly by the MIT Plasma Science Fusion Center (PSFC) Commonwealth Systems (CFS) as technology enabler of pathway fusion energy,...
The SPARC Toroidal Field Model Coil (TFMC) experimental tests are described. include detailed comparisons to a hierarchy of electromagnetic and structural models the coil. confirmed ability no-insulation no-twist (NINT) configuration provide highly stable DC operations with peak magnetic field in excess 20 tesla at REBCO tape stacks. advantages modular TFMC approach were validated including test probe response coil stages; strategy that will be applied large-scale production for SPARC....
In this paper, a 1:4.25 ratio ferrite magnet and Nd-Fe-B flux-focusing magnetic gearbox with high pole count is analyzed. A simple parameter sweep analysis used to show that higher than previously published torque density values are achievable. Experimental results then presented for the design confirm calculations also demonstrate proposed can operate low ripple.
Abstract A low-AC loss Rare-earth barium copper oxide (REBCO) cable, based on the VIPER cable technology has been developed by commonwealth fusion systems for use in high-field, compact tokamaks. The new is composed of partitioned and transposed ‘petals’ shaped to fit together a circular pattern with each petal containing REBCO tape stack insulated from other reduce AC losses. stainless-steel jacket adds mechanical robustness—also serving as vessel solder impregnation—while tube runs through...
In this paper a 1:4.25 ratio ferrite magnet and NdFeB flux-focusing magnetic gearbox with high pole count is analyzed. A simple parameter sweep analysis used to show that higher than previously published torque density values are achievable. Experimental results then presented for the design confirm calculations also demonstrate proposed can operate low ripple.
This paper investigates the mechanical deflection within steel bars in a flux focusing magnetic gear. The is caused by attraction between and inner outer rotor magnets. non-linearity considered. Experimental results are presented.
A magnetic gear offers many advantages over its mechanical counterpart such as contact free torque production, no lubrication and inherent overload protection. However, current designs use large quantities of rare- earth magnet material unfortunately the high cost rare-earth makes uncompetitive with alternative technology. This paper investigates a low-cost using ferrite magnets. (6 pages)
In this paper the mechanical deflection of steel bars, different length, in a flux focusing magnetic gear is studied. The caused by attraction between bars and inner outer rotor magnets th
This paper presents the design investigation and experimental testing of a flux-focusing magnetic gearbox with three piece laminated rotor structure. Each is made single lamination stack held together via thin bridges. It calculated that mechanical bridges reduces torque density from 156Nm/L to 139Nm/L (a reduction 11%). The experimentally measured shown be only 95Nm/L because magnets were demagnetized during testing.
Abstract A mathematical model for the charging simulation of non-insulated superconducting pancake solenoids is presented. Numerical solutions are obtained by using a variety solvers. scalability analysis performed both direct and preconditioned iterative solvers four different pancakes with varying number turns mesh elements. It found that even two extremely time scales in system an solver combination (FGMRES-GMRES) conjunction parallel Auxiliary Space Maxwell Solver (AMS) preconditioner...
A mathematical model for the charging simulation of non-insulated superconducting pancake solenoids is presented. Numerical solutions are obtained by implemented on Petra-M FEM platform using a variety solvers. scalability analysis performed both direct and preconditioned iterative solvers four different pancakes with varying number turns mesh elements. It found that even two extremely time scales in system an solver combination (FGMRES-GMRES) conjunction parallel Auxiliary Space Maxwell...
The SPARC Toroidal Field Model Coil (TFMC) Program was a three-year effort between 2018 and 2021 that developed novel Rare Earth Yttrium Barium Copper Oxide (REBCO) superconductor technologies then successfully utilized these to design, build, test first-in-class, high-field (~20 T), representative-scale (~3 m) superconducting toroidal field coil. With the principal objective of demonstrating mature, large-scale, REBCO magnets, project executed jointly by MIT Plasma Science Fusion Center...