Design and Preliminary Prototype Test of a High Temperature Superconducting Suspension Electromagnet

Xu, Jie; Li, Jie; Li, Guanchun; Guo, Zhaoyu

doi:10.1109/tasc.2014.2372002

Cited by 7 publications

(7 citation statements)

References 14 publications

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“…However, EMS needs excitation power to operate its electromagnets and large currents to generate high magnetic fields, but hybrid excitation is proposed as an energy-saving strategy [33]. Moreover, by replacing the conventional electromagnet, the EMS can be configured with superconducting coils [34], [35], which can greatly improve the magnetic strength, especially at high air gap heights. Moreover, it can reduce the onboard heating of the classical coils if it can be cooled cryogenically(e.g., K, or lower temperatures).…”

Section: A Electro-magnetic Suspension (Ems)mentioning

confidence: 99%

“…• Requires precise monitoring to maintain levitation height; [34], [35] • Laminated track yields lift-to-drag ratio ≥ 500;…”

Section: B Electro-dynamic Suspension (Eds)mentioning

confidence: 99%

“…In eqs. (33) and (34), F thrust is the needed forward thrust force to overcome the magnetic drag (F drag ) and the air drag (F aero ), m the total mass of the vehicle, c D (or F drag /F lif t ) the drag-to-lift ratio [predicted in eqs. (31) and 40 During the acceleration zone, additional traction power will be needed, according to…”

Section: Hyperloop Propulsion Technologiesmentioning

confidence: 99%

“…The primary job of the electric propulsion system (EPS) is to provide the traction power needed according to eqs. (34) and (35). The different variants of the EPS are described in in the following subsections, depicted in Fig.…”

Section: Hyperloop Propulsion Technologiesmentioning

confidence: 99%

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Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Nøland

2021

IEEE Access

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The present article outlines the core technologies needed to realize the Hyperloop transportation system (HTS). Currently, the HTS vacuum tube train concept is viewed as the fastest way to cross the earth's surface. However, the concept has not yet been demonstrated for subsonic or near-sonic speeds in large-scale implementations. Among the challenging technical areas are the tube's depressurization, the capsule's air resistance, and choked flows occurring around the capsule. There is also a need for effective levitation and propulsion solutions compatible with the velocities being proposed. Moreover, several conflicting objectives have been identified in the HTS design. It is highlighted that the tubes should be wide enough to lower the capsule's drag forces but that a large-sized tube comes at the expense of higher operational energy costs and infrastructure investments. Another struggle is aiming at a low-cost passive track design and, and at the same time, a lightweight vehicle. One technical path is to turn the whole guideway into an electric propulsor, arriving at a 'lightweight capsule solution' (LCS). Alternatively, the vehicle could be transformed into a 'modified airplane' that stores massive amounts of onboard energy, yielding an energy-autonomous 'low infrastructure solution' (LIS). In a case study, it is shown that even LIS technology is compatible with short-haul flights (1500 km) but that it requires an energy reservoir of about 30 % of the capsule's overall mass. Results and discussions presented in this paper are supported by analytical predictions with parameters or input data either supported by referred simulations or experiments. In general, the paper aims to open up the discussion, provide a sufficient understanding of the Hyperloop field's multidisciplinary aspects, and establish a foundation for further investigations. In the end, new research tasks have been defined, which have the potential to go beyond the state of current knowledge.

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Section: A Electro-magnetic Suspension (Ems)mentioning

confidence: 99%

“…• Requires precise monitoring to maintain levitation height; [34], [35] • Laminated track yields lift-to-drag ratio ≥ 500;…”

Section: B Electro-dynamic Suspension (Eds)mentioning

confidence: 99%

Section: Hyperloop Propulsion Technologiesmentioning

confidence: 99%

Section: Hyperloop Propulsion Technologiesmentioning

confidence: 99%

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Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Nøland

2021

IEEE Access

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“…Generally speaking, finite element model method is usually used to resolve the electromagnetic fields problems [15,16]. It is able to provide much more realistic and accurate results in order to verify the theoretical calculation results at the expense of computation cost.…”

Section: Finite Element Model Verificationmentioning

confidence: 99%

Calculation and evaluation of load performance of magnetic levitation system in medium-low speed maglev train

Zhai

2019

International Journal of Applied Electromagnetics and Mechanics

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The medium-low speed maglev train is an entirely new way of transportation without wheels, and it makes the best of the attraction between the electromagnet and the F-type track to achieve levitation. The magnetic levitation system is considered as the wheels of medium-low speed maglev train, which plays a major role in bearing the weight of vehicle. The theoretical calculation and finite element numerical analysis are performed to calculate the load performance of the magnetic levitation system under different load conditions. The difference of calculation results between the two methods is analyzed and discussed. In addition, a series of load-carrying tests in vehicles operating on Changsha maglev express is carried out. The experimental results have revealed that the calculation results based on FEM are basically matched with that of actual well conditions. Therefore, the load performance of the magnetic levitation system in medium-low speed maglev train is calculated and evaluated successfully.

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Simulation and Test of Energy Consumption of High-Tc Superconducting Coils in Electromagnetic Levitation System

Song

et al. 2021

IEEE Access

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In order to evaluate the energy consumption of the superconducting magnetic levitation system with real-time control, the methods of simulation and test were used to study the AC plus DC loss of the superconducting coil. The simulation established a 2D finite element model in COMSOL, which was based on the H equations method with simple form and fast calculation speed. The test was carried out on a new type of measurement system, which adopted the electrical method with high sensitivity, simple operation and easy implementation. The results of simulation and test showed that, under normal working conditions, the levitation current in the form of AC plus DC produced a relatively small energy loss below 1mW per meter. This conclusion is helpful for the promotion and application of superconducting magnetic levitation control system.

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Design and Preliminary Prototype Test of a High Temperature Superconducting Suspension Electromagnet

Cited by 7 publications

References 14 publications

Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Calculation and evaluation of load performance of magnetic levitation system in medium-low speed maglev train

Simulation and Test of Energy Consumption of High-Tc Superconducting Coils in Electromagnetic Levitation System

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