Study of EDS &amp; EMS Hybrid Suspension System With Permanent-Magnet Halbach Array

Li, Zhiqiang; He, Guang; Xue, Shengli

doi:10.1109/tmag.2011.2159237

Cited by 62 publications

(28 citation statements)

References 17 publications

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“…4a [11,12]. On-board magnets, when moving forward with the vehicle over the guideway consisting of inductive coils or conducting sheets, generate repulsive force due to interactions of onboard magnets with the currents induced in the guideway coils [13,14]. This repulsive force provides the required levitation to the vehicle.…”

Section: Electro-dynamic Suspension System (Eds)mentioning

confidence: 99%

Electrical Components of Maglev Systems: Emerging Trends

2019

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Consistently rising environmental concerns and depleting petroleum resources have accentuated the need of sustainable, energy efficient and clean means of transport. This has provided the impetus to the research and development of clean alternatives for existing public transportation systems. Development of linear motor-propelled, contact-less maglev systems is considered a promising alternative to conventional on-wheel rail transport technology. Maglev technology primarily focuses on improving the performance, speed, fuel economy, driving range and operating cost of the transit system. These parameters vary with the design and efficiency of the electrical system used in maglev-based transportation systems. To present this study, firstly, a detailed survey of the important constituents of a maglev electrical system has been carried out with techno-economic perspectives. Contemporary maglev technologies have then explored along with their respective advantages and limitations. Electrical systems form the heart of maglev systems and, therefore, this paper presents the components of a standard electrical system together with the comparative analysis in terms of present trends, ongoing technological advancements and future challenges.

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Section: Electro-dynamic Suspension System (Eds)mentioning

confidence: 99%

Electrical Components of Maglev Systems: Emerging Trends

2019

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“…When the moving vehicle reaches a certain speed, the repulsive force increases enough to levitate the train. Thus, the EDS structure does not need active control and is an essential open-loop stable system [6]. Superconducting (SC) magnet and permanent magnet (PM) are two excitation sources applied in EDS system, and there are two kinds of EDS rails: continuous conductive plate and discrete metal coil.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Plate Type Electrodynamic Suspension Structure for Ground High Speed Systems

et al. 2019

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The research of ground high speed systems has been popular, especially after the announcement of Hyperloop concept, and the analysis of the suspension structure is critical for the design of the system. This paper focuses on the design and analysis of a plate type electrodynamic suspension (EDS) structure for the ground high speed system. The working principle of proposed whole system with functions of levitation, guidance and propulsion is presented, and the researched EDS structure is composed of permanent magnets (or superconducting magnets) and non-ferromagnetic conductive plates. Levitation and guidance are achieved by forces generated through the motion of the magnets along the plates. The plate type EDS structure is analyzed by three-dimensional (3D) finite element method (FEM) in ANSYS Maxwell. Structure parameters that affect the EDS performances are investigated, which include dimensions of magnets and plates, plate material, the relative position between magnets and plates, and arrangement of magnets. The properties of forces are discussed, especially for the levitation force, and the levitation working point is decided based on the analysis. Levitation-drag ratio of the plate type structure is investigated, and it improves with the increasing of vehicle velocity. The analysis results indicate that the plate type EDS structure is feasible for applications in ground high speed systems. The following study will focus on the dynamic research of the EDS system.

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“…The lower is the friction between the chain and the beam, the lower is the power consumption and the surface wear. The magnetic levitation technology can be utilized to reduce friction using properly designed coils (Leßmann and Hameyer, 2006;Hong and Kim, 2008) or permanent magnets (PM) (Moser et al, 2006;Ravaud et al, 2009a, b;Long et al, 2011;Bachovchin et al, 2013). Passive repulsive bearing using PM have been extensively studied and can be used in motors, turbines, flywheels, etc.…”

Section: Introductionmentioning

confidence: 99%

Design and testing of a magnetic suspension for a 90° horizontal bend conveyor

Fabbri

Ribani

Zuffa³

2015

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -A conveyor device is studied with the aim to reduce the friction between the inner surface of the beam and the chain. The lower is the friction between the chain and the beam, the lower is the surface wear. The magnetic repulsion force among permanent magnets (PMs) placed on the beam and on the chain is utilized to reduce friction. The paper aims to discuss these issues. Design/methodology/approach -The considered magnetic suspension is realized with PMs in repulsive configuration; it is designed by solving a constrained optimization problem, with reference to the geometry of the 901 horizontal bend FlexLink WL322 conveyor. Flux density field and its gradient are evaluated using volume integral equation method, allowing to calculate the forces acting on the chain and the stiffness of the magnetic suspension. Findings -The magnetic suspension prototype was manufactured and tested. The experimental and calculated values of the forces acting on the chain compares well. A stable horizontal equilibrium of the chain was obtained during both static and dynamical tests.Research limitations/implications -The quasi-static model used neglects the dynamical interactions among the elements of the chain, the PMs and loads weight during motions and the eddy current losses in the aluminium beam. However the dynamical tests on the prototype show that the chain motion is regular up to the nominal velocity all along the conveyor with the exception of the trailing edge of the 901 curve. Practical implications -The tests on the prototype show the possibility of a removal or at least a reduction of the friction force between the chain and the inner side of the beam by means of a passive magnetic suspension. As a consequence a reduction of noise and vibrations and an increase of the mean-time-to-failure is expected. Originality/value -Prototype testing shows that the unavoidable vertical instability of the magnetic forces has no practical consequence since, reducing the allowed vertical gap, the chain is stabilized by the gravitational force.

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Study of EDS & EMS Hybrid Suspension System With Permanent-Magnet Halbach Array

Cited by 62 publications

References 17 publications

Electrical Components of Maglev Systems: Emerging Trends

Electrical Components of Maglev Systems: Emerging Trends

Design and Analysis of a Plate Type Electrodynamic Suspension Structure for Ground High Speed Systems

Design and testing of a magnetic suspension for a 90° horizontal bend conveyor

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