NDLI: Scaling laws for electrodynamic suspension in high-speed transportation

Content Provider	IET Digital Library
Author	Flankl, Michael Wellerdieck, Tobias Tüysüz, Arda Kolar, Johann Walter
Abstract	Electrodynamic suspension (EDS) relies on the repulsive force created by eddy currents in a stationary conductive body (rail) and a magnetic field generated by an excitation system on a moving vehicle (pod). The excitation system in this paper consists of permanent magnets in a Hallbach array. EDS generates lift forces that levitate the pod reliably at high speeds of the vehicle since no mechanical suspension is required. Therefore, it gains interest for high-speed transportation applications such as the Hyperloop project, driven by the Space Exploration Technologies Corporation (SpaceX). Electrodynamic fields and forces have been analysed in detail in the literature; however, the sophistication and/or limited applicability of analytical approaches or the computational burden of FEM/numerical methods render those impractical for the initial design of EDS systems. Therefore, power and loss scaling laws for EDS systems are derived in this study. A 3D simulation for a design example shows that the scaling law is within 10% deviation. Finally, the drag coefficient of EDS systems is compared with other forms of commercial high-speed ground and air transportation systems. A pod with EDS running in vacuum has the potential of decreasing energy consumption significantly above the cruising speeds of modern subsonic airliners.
Starting Page	357
Ending Page	364
Page Count	8
ISSN	17518660
Volume Number	12
e-ISSN	17518679
Issue Number	Issue 3, Mar (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/12/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0480
Journal	IET Electric Power Applications
Publisher Date	2017-11-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Conductive Body Drag Drag Coefficient EDS System Electrodynamic Suspension Electrodynamics Energy Consumption Finite Element Analysis Finite-element Method-numerical Method Halbach Array High-speed Air Transportation System High-speed Ground Transportation System High-speed Transportation Application Hyperloop Project Induced Eddy Current Magnetic Excitation System Mechanical Component Mechanical Suspension Permanent Magnet Permanent Magnets Space Exploration Technology Corporation SpaceX Subsonic Airliner Suspensions Three-dimensional Simulation Transportation Vehicle Suspension Concept
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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