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

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6549
Author(s):  
Tomasz Kublin ◽  
Lech Grzesiak ◽  
Paweł Radziszewski ◽  
Marcin Nikoniuk ◽  
Łukasz Ordyszewski
Keyword(s):  
Power Consumption ◽  
High Speed ◽  
Permanent Magnets ◽  
Passive System ◽  
Magnetic Systems ◽  
Suspension Systems ◽  
Instantaneous Power ◽  
Halbach Array ◽  
Levitation System ◽  
Electrodynamic Suspension

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.

scholarly journals COMPARATIVE ANALYSIS OF MAGNETIC SYSTEMS OF PERMANENT MAGNET MOTORS FOR TRAM

2021 ◽  
Vol 2021 (5) ◽  
pp. 27-37
Author(s):  
V.V. Grebenikov ◽  
◽  
R.V. Gamaliia ◽  
S.A. Dadychyn ◽  
◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Electric Drive ◽  
High Speed ◽  
Permanent Magnets ◽  
Numerical Study ◽  
Thermal Calculation ◽  
Air Cooling ◽  
Electric Motors ◽  
Magnetic Systems ◽  
Low Speed

A numerical study of eight configurations of magnetic systems of electric motors with permanent magnets for driving a tram was carried out. The permanent magnet electric motor can be used as a high-speed electric drive to replace the existing DC electric drive of a tram, and as a low-speed gearless electric drive of a new generation tram. The most promising configurations of magnetic systems of electric motors with permanent magnets for tram drive have been determined. By varying the geometrical and winding parameters of each of the investigated models of electric motors, the mechanical characteristics are determined, at which the given torque and power are achieved in the entire range of the rotor speed. Also, a thermal calculation was performed taking into account the urban driving cycle of high-speed electric motors with air cooling by a fan and low-speed ones in liquid cooling mode. The calculation of the characteristics of the investigated electric motors was carried out in the Simcentre MotorSolve software package. References 13, figures 8, tables 3.

scholarly journals Capsule Vehicle Dynamics Based on Levitation Coil Design Using Equivalent Model of a Sidewall Electrodynamic Suspension System

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4979
Author(s):  
Ranhee Yoon ◽  
Birhan Abebaw Negash ◽  
Wonhee You ◽  
Jungyoul Lim ◽  
Jinho Lee ◽  
...  
Keyword(s):  
High Speed ◽  
Ride Comfort ◽  
Vertical Direction ◽  
Magnetic Suspension ◽  
Equivalent Model ◽  
Vehicle Body ◽  
Lateral Direction ◽  
Levitation System ◽  
Electrodynamic Suspension ◽  
Levitation Coil

A levitation system based on sidewall electrodynamic suspension (EDS) is considered for a capsule vehicle, which is a next-generation high-speed transportation system currently being studied. This levitation system does not require controlling of the gap between the guideway and the vehicle on which the superconducting electromagnet is mounted. However, when the vehicle is operated in a levitated state, the ride comfort is worse than that of the levitation system based on electromagnetic suspension (EMS), making it necessary to develop methods that can ensure good riding comfort. In addition, because the EDS system is complex and nonlinear with a combination of electromagnetics and mechanical dynamics, it is complicated to analyze the dynamic characteristics of the capsule vehicle, and the corresponding numerical analysis is time-consuming. Therefore, to easily understand the running dynamics of a capsule vehicle in the sidewall EMS system, the magnetic suspension characteristics corresponding to the primary suspension are simply modeled by considering the levitation stiffness in the vertical direction and the guidance stiffness in the lateral direction, similar to that in the case of the mechanical suspension. In this study, mathematical models of the levitation and guidance stiffnesses with respect to the speed and position of a vehicle body running at high speeds in a levitated state in the sidewall EDS system were derived for three design proposals of the levitation coil. The dynamic behavior of the vehicle based on the three design proposals was investigated by simulating a capsule vehicle model with 15 degrees of freedom.

scholarly journals Modeling of Electrodynamic Suspension Systems

2006 ◽  
Author(s):  
Nam Ho Kim ◽  
Long Ge
Keyword(s):  
Dynamic Models ◽  
Magnetic Levitation ◽  
Optimization Technique ◽  
Suspension Systems ◽  
Concentric Force ◽  
Numerical Tests ◽  
Contact Constraint ◽  
Levitation System ◽  
Magnetic Levitation System ◽  
Electrodynamic Suspension

Characteristics of magnetic–levitation system are studied using dynamic models that include motion–dependent lift, drag, slip, and roll motions. In addition, the contact constraint between the vehicle and the track is modeled using the penalty method. Unknown numerical parameters are identified using the optimization technique. The numerical tests are focused on the damping characteristic, stability in lifting and slip motions, the lifting efficiency compared with the concentric force, and contact with track.

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

Symmetry ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1117 ◽  
Author(s):  
Zhaoyu Guo ◽  
Danfeng Zhou ◽  
Qiang Chen ◽  
Peichang Yu ◽  
Jie Li
Keyword(s):  
High Speed ◽  
Permanent Magnets ◽  
Superconducting Magnets ◽  
Three Dimensional ◽  
Vehicle Velocity ◽  
Working Principle ◽  
3D Finite Element Method ◽  
Electrodynamic Suspension ◽  
Suspension Structure ◽  
Plate Type

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.

Characterization and Optimization of Berdut Technology for a Magnetically Levitated Train

2005 ◽  
Author(s):  
Ezequiel Medici ◽  
David Serrano ◽  
Jeffrey Robles
Keyword(s):  
High Speed ◽  
Permanent Magnets ◽  
Magnetic Levitation ◽  
Linear Motor ◽  
High Speed Train ◽  
Damping Characteristics ◽  
Levitation System ◽  
Magnetic Levitation System ◽  
Working Principle ◽  
Stiffness And Damping

Berdut Technology is a novel magnetic levitation system suitable for high speed train applications. This technology combines magnets and electromagnets to obtain levitation and propulsion. A Berdut array of permanent magnets is used to provide the levitation via skates that are located on both sides of the vehicle. Both the rails and the skates are based on permanent magnets therefore no energy is required for levitation. A linear motor located along the center of the vehicle provides the propulsion. Both, skate and linear motor use the same concept and working principle. The paper is divided into two parts: the first part describes the skate levitation, while the second part describes the linear motor. Finite element method was chosen to model and simulate both the skate levitation and the linear motor. Energy dissipation resulting from hysteresis and eddy current losses in the skate was determined. Stiffness and damping characteristics for the levitation skates are presented and validated. The efficiency and thrust force for the linear motor model are also presented along with experiments performed to validate the simulations. Once, validated the models are used to design a Maglev suspension and a linear motor for high-speed train applications.

scholarly journals Equivalent inductance model for the design analysis of electrodynamic suspension coils for hyperloop

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jungyoul Lim ◽  
Chang-Young Lee ◽  
Ye Jun Oh ◽  
Jeong-Min Jo ◽  
Jin-Ho Lee ◽  
...  
Keyword(s):  
High Speed ◽  
Magnetic Levitation ◽  
Three Dimensional ◽  
Stability And Control ◽  
Levitation System ◽  
Subsonic Speed ◽  
3D Finite Element Method ◽  
And Control ◽  
Electrodynamic Suspension ◽  
Novel Model

AbstractHyperloop is a new concept of ground transportation. In Hyperloop, travelling occurs in near-vacuum tubes under 0.001 atm at a subsonic speed of up to 1200 km/h. During acceleration to and driving at a subsonic speed, magnetic levitation is employed. Thus far, various levitation technologies in existing high-speed maglev trains have been considered. Among those technologies, superconducting (SC) electrodynamic suspension (EDS) is a highly effective levitation system for Hyperloop owing to its advantages of a large levitation gap, levitation stability, and control being unnecessary. However, analyzing an EDS system requires the electromagnetic transient analysis of complex three-dimensional (3D) features, and its computational load generally limits the use of numerical methods, such as the 3D finite element method (FEM) or dynamic circuit theory. In this study, a novel model that can rapidly and accurately calculate the frequency-dependent equivalent inductance was developed. The developed model was then applied to design an EDS system using the decoupled resistance-inductance equations of levitation coils. Next, levitation coils of SC-EDS were designed and analyzed for use in Hyperloop. The obtained results were compared with the FEM results to validate the developed model. In addition, the model was experimentally validated by measuring currents induced by moving pods.

Development of Actuator with Permanent Magnets Arranged in Halbach Array

2016 ◽  
Vol 856 ◽  
pp. 221-226
Author(s):  
Iwanori Murakami ◽  
Seiji Machida ◽  
Tadashi Yamagami ◽  
Yoshinori Ando
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnets ◽  
Ring Type ◽  
Halbach Array

For robot making high-speed action like human, its actuator needs to be light and powerful. This study developed actuator with permanent magnet arranged in Halbach-array, and examined performance of this actuator by magnetic simulation. In result of experiment, it is proved that actuator exerts a force over 100N when the distance between ring type magnets is 11mm.

scholarly journals Power-efficient low-stray field hybrid magnets for MAGLEV technology

2021 ◽  
pp. 117-121
Author(s):  
Daria Arslanova ◽  
Alexey Firsov ◽  
Vladimir Kukhtin ◽  
Eugeny Lamzin ◽  
Mikhail Larionov ◽  
...  
Keyword(s):  
Power Consumption ◽  
Permanent Magnets ◽  
Suspension System ◽  
Stray Field ◽  
Power Efficient ◽  
Optimum Performance ◽  
Suspension Systems ◽  
Hybrid Configuration ◽  
Sufficient Reduction

A hybrid suspension system is proposed for maglev transport that utilizes electromagnets (EM) in combination with permanent magnets (PM). Several design schemes are compared searching for optimum performance. Sufficient reduction of power consumption and stray field is achieved on the hybrid configuration as compared to conventional EM suspension systems.

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