Study of Japanese electrodynamic-suspension maglev systems

He, Jiangen; Rote, D.M.; Coffey, H.T.

doi:10.2172/10150166

Cited by 22 publications

(17 citation statements)

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“…The magnetic field generated by the relative motion between the pod and the conductive sub-track causes a repulsive force, lifting the vehicle. This method, however, is not novel and falls under a specific category of Maglev known as electrodynamic suspension (EDS) which has been demonstrated by engineers in Japan [28]. The permanent magnetic EDS system is passive and thus does not require a constant power source like the most common Maglev technology, electromagnetic suspension system (EMS).…”

Section: Magnetic Levitation Podmentioning

confidence: 99%

“…As an added result, the passive EDS system cannot levitate the Hyperloop pod at a station and can only levitate the pod at sufficiently high speeds, about 94 mph (150 kph) [21]. Consequently, a Hyperloop pod equipped with passive magnetic levitation should use wheels at rest and when accelerated, like an aircraft, as suggested for EDS Maglev configurations by He et al [28] and Paudel [29].…”

Section: Magnetic Levitation Podmentioning

confidence: 99%

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Design and development of the Hyperloop Deployable wheel system

Klim¹

2023

Preprint

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In 2013 Elon Musk inspired engineers and entrepreneurs with his idea for a 5th mode of transportation: the Hyperloop. Using large near-vacuum tubes as a medium, Musk envisioned sending humans and cargo in levitating pods from Los Angeles to San Francisco California in 35 minutes or less. Consisting of multiple subsystems, these pods would use magnetic or air-bearing technology for primary levitation to accommodate speeds approaching 700 mph. To address Musk’s call for a traditional deployable wheel system to provide added safety and low-speed mobility for the pods, a patent-pending Hyperloop Deployable Wheel System (HDWS) was developed. This report details the author’s contribution to the design and development of the award-winning HDWS and examines the constraints and limitations imposed by the Hyperloop concept: small operational space, near-vacuum low-pressure conditions, high-speed use and smooth ride requirements.

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Section: Magnetic Levitation Podmentioning

confidence: 99%

Section: Magnetic Levitation Podmentioning

confidence: 99%

Design and development of the Hyperloop Deployable wheel system

Klim¹

2023

Preprint

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“…Since a train may stop at any location, due to equipment problems, for instance, the entire track must be able to support both low-speed and high-speed operations. Another disadvantage is that EDS system naturally can produce a field in the track in front and to the rear of lift magnets, which can act against the magnets and produce the drag force [5].…”

Section: Characteristics and Classification Of Maglev Trainmentioning

confidence: 99%

Maglev Train Overview

Liu

2015

Springer Tracts in Mechanical Engineering

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IntroductionMaglev (means magnetic C levitation) is a method of propulsion that uses magnetic levitation to propel vehicles with magnets rather than with wheels, axles, and bearings. With the Maglev, a vehicle is levitated a short distance away from a guideway by using magnets to create both lift and thrust. In general, Maglev trains move more smoothly and somewhat more quietly than wheeled mass transit systems. Their non-reliance on traction and friction means that acceleration and deceleration can surpass that of wheeled transports and they will be protected from the weather. At very high speeds of the conventional wheeled trains, the wear and tear from friction along with the hammer effect from wheels on rails will accelerate equipment deterioration and prevent mechanically based train systems from routinely achieving higher speeds. On the contrary, Maglev tracks have historically been found to be much more expensive to construct, but require less maintenance and have lower ongoing costs. Maglev can transport passengers and freight over long distances at speeds of hundreds of miles per hour. Maglev promises to be a major mode of transport in the twenty-first century, even more important than autos, trucks, and airplanes [1].The term "Maglev" refers not only to the vehicles but also to the railway system, specifically designed for magnetic levitation and propulsion. All operational implementations of Maglev technology have the minimal overlap with wheeled train technology and have not been compatible with conventional rail tracks. Considering the fact that they cannot share existing infrastructure, these Maglev systems must be designed as complete transportation systems. In addition, the vacuum tube train systems might hypothetically allow Maglev trains to attain speeds in a different order of magnitude. While no such tracks have been built commercially yet, there are efforts being made to study and develop "super-Maglev" trains.

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“…However, at relatively low speeds (below 300 km/h) electrodynamic systems such as Inductrack generate high drag forces when compared with a classic nonmagnetic high-speed railway [10][11][12]. Several solutions of EDS systems that generate low drag force have been proposed, such as null flux systems [13,14] or a ladder-type Inductrack [15,16]. In both of those systems, the reduction of drag force comes from the optimization of the conducting track geometry.…”

Section: Introductionmentioning

confidence: 99%

Reducing the Power Consumption of the Electrodynamic Suspension Levitation System by Changing the Span of the Horizontal Magnet in the Halbach Array

et al. 2021

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In high-speed magnetic railways, it is necessary to create the forces that lift the train. This effect is achieved by using active (EMS) or passive (EDS) magnetic systems. In a passive system, suspension systems with permanent magnets arranged in a Halbach array can be used. In this paper, an original Halbach array with various alternately arranged horizontally and vertically magnetized magnets is proposed. Correctly selected geometry allows us to obtain higher values of levitation forces and lower braking forces in relation to a system with identical horizontally and vertically magnetized elements. The effect of such a shape of the magnetic arrangement is the reduction of instantaneous power consumption while traveling due to the occurrence of lower braking forces. In order to perform a comparative analysis of the various geometries of the Halbach array, a simulation model was developed in the ANSYS Maxwell program. The performed calculations made it possible to determine the optimal dimensions of horizontally and vertically magnetized elements. The results of calculations of instantaneous power savings for various cruising speeds are also included.

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Study of Japanese electrodynamic-suspension maglev systems

Cited by 22 publications

References 0 publications

Design and development of the Hyperloop Deployable wheel system

Design and development of the Hyperloop Deployable wheel system

Maglev Train Overview

Reducing the Power Consumption of the Electrodynamic Suspension Levitation System by Changing the Span of the Horizontal Magnet in the Halbach Array

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