This paper describes the construction and main components of a full-scale superconducting magnetic levitation vehicle. The prototype, comprising four 1.5-m-long wagons, will travel short test line 200 meters, connecting two buildings inside campus Federal University Rio de Janeiro. efforts to implement this technology started thirteen years ago with small-scale prototype in an attempt prove concept. second step was functional that could levitate more than one Ton. actual stage project is...

Several techniques to model high temperature superconductors (HTSs) are used throughout the world. At same time, use of in transportation and magnetic bearings promises an increase energy efficiency. However, most widespread simulation technique literature, H-formulation, has not yet been simulate superconducting levitation. The goal this work is present solutions for challenges concerning H-formulation predict behavior levitators built either with YBCO bulks or stacks 2G wires. It worth...

The Brazilian project MagLev-Cobra proposes a superconducting levitation vehicle for urban transportation in highly populated cities. technology is based on the diamagnetic behavior and flux pinning property of Y-Ba-Cu-O blocks proximity magnetic field Nd-Fe-B magnets. traction given by short primary linear induction motor. In previous editions EUCAS conference, laboratory tests were presented to validate method design. this paper, recent operational results traveling along an outdoor 200-m...

High-temperature superconductors are a powerful technological option to be applied in the current scenario of energy transition. Their applications include fault limiters, power electrical cables, and machines, for example. Due non-linearities superconductors, it is computationally costly run real models superconducting equipment. Therefore, paramount importance have reliable fast formulation model devices. This paper proposes new hybrid J-A simulate The validated with 5 case studies, some...

A full-scale MagLev vehicle prototype has been developed by the team of Laboratory for Applied Superconductivity from Federal University Rio de Janeiro. This is named MagLev-Cobra (cobra means snake in Portuguese), because it composed several modules and its motion curves resembles movement a snake. The suspension technology proposed this levitation bulk superconductors above rail made with Nd-Fe-B magnets steel. main advantages are low energy consumption, negligible noise emission,...

This article describes the construction and operational advantages of a superconducting magnetically levitated (MagLev) vehicle in comparison with wheel-rail traditional options applied to urban transportation. The technology was tested small-scale prototype. A other MagLev technologies is presented application niches are identified. steps for full-scale implementation commercialization will also be addressed.

Approximately a decade ago, superconducting maglev train prototypes started to be developed. Researchers from China, Germany, and Brazil have built carrying people based on levitation technology. The Brazilian MagLev project, named MagLev-Cobra, in 2000 with small-scale prototype that was concluded 2006. After that, efforts toward full-scale test vehicle for 30 passengers began. This will composed of 4 modules, each one 1.5 m long, six cryostats linear induction motor. first module 12 track...

This paper presents a magnetic bearing set developed to work in flywheel energy storage system. The is composed of permanent (PMB) and superconducting (SMB). A new configuration PMB having Nd-Fe-B magnet rings back yoke proposed compared with an existing one. Finite element method (FEM) simulations were used design two different configurations. Measurement results axial radial forces carried out zero field cooling (ZFC) (FC) processes SMB topologies. These measured force are presented...

Numerical models based on the finite-element method are popular tools for investigating macroscopic electromagnetic behavior of high-temperature superconductor (HTS) applications. This article explains how to use <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$T$</tex-math></inline-formula> - notation="LaTeX">$A$</tex-math></inline-formula> formulation in COMSOL Multiphysics modeling HTS coils 2-D with...

This paper presents test results of a flywheel energy storage system (FESS) prototype. The bearing is composed superconducting magnetic thrust (SMB) and permanent magnet (PMB). SMB was built with Nd-Fe-B YBCO blocks. PMB has the function positioning radially switched reluctance machine (SRM) used as motor/generator reduce load over SMB. SRM drive responsible to convert electrical into mechanical energy, vice versa. prototype still operates at low speeds, but dynamical simulations showed that...

Superconducting fault current limiters (SCFCLs) represent a promising solution to the problem of increasing short- circuit currents in grid. The SCFCL is based on fast transition from superconducting state normal state, causing sudden increase impedance network. In this paper, we simulate behavior resistive-type modules. modules are MCP-BSCCO 2212 coils. superconductor acts as nonlinear resistance that varies with and temperature. simulated curves consistent experimental results....

A numerical model based on the critical-state approximation and a magnetic-energy minimization procedure is presented to simulate levitation of system composed two isolated infinitely long superconductors levitating over permanent-magnet guideways. Three different sets magnetic guideways are simulated compared with experimental tests linear superconducting bearing for prototype real vehicle. In spite complexity guideway design, serves as first approach calculate vertical force these...

The second-generation (2G) YBCO wire has been used for several applications, such as electric power transmission and distribution cables, fault current limiters, MagLev vehicles, machines, high field magnets, superconducting magnetic energy storage, etc. main advantages of 2G wires are: critical density values, large scale production, lower manufacturing cost than first generation, superior performance under fields. This work presents a preliminary study bearings (SMB) using passive...

The superconducting MagLev technology for transportation systems is becoming mature due to the research and developing effort of recent years. Brazilian project, named MagLev-Cobra, started in 1998. It has goal a levitation vehicle urban areas. adopted based on diamagnetic flux pinning properties YBa2Cu3O7−δ (YBCO) bulk blocks interaction with Nd-Fe-B permanent magnets. A laboratory test facility magnet guideway, linear induction motor one module been built investigate its operation....

A-V and H are two of the most widespread formulations applied in literature to calculate current distribution high-temperature superconductors (HTSs). Both can successfully solve problems related large-scale HTS applications, but way implement calculations is different. In recent years, several authors have chosen formulation applications. This choice probably be attributed easy implementation with aid commercial finite element method (FEM) software, producing precise results performing fast...

The application of High-Temperature Superconductor (HTS) coils made coated conductors has been investigated for many years. A possible configuration such is the jointless loop, also known as ring coil. double crossed loop coil (DCLC) successfully applied in superconducting magnetic bearings (SMBs). design SMBs with DCLCs requires flexible modelling to allow all parts device be represented. This work proposes T-A formulation a thin-film approximation SMB finite element analysis framework. 2D...

The J-A formulation, or approach, is a set of differential equations that allow simulations superconducting devices with A-formulation based modeling without the need to use conductivity, which may cause numerical stability problems in finite element solvers. In this paper, method couple approach electric circuits presented and discussed. A simple test case single tape connected circuit used as benchmark. Two strategies physical representation tapes are explored. first, simplest,...

A Brazilian real scale magnetically levitated transport system prototype is under development at the Federal University of Rio de Janeiro. To test this a 180 m long line has been projected and it will be concluded by end 2010. superconducting linear bearing (SLB) used to replace wheels conventional train. High temperature superconductor bulks placed inside cryostats attached vehicle magnetic rail composes SLB. choose for three different rails, selected in previous simulation work, were built...