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

The magnetic levitation system is a critical part to guarantee safe and reliable operations of a maglev train. In this paper, the control strategy is proposed for the magnetic levitation system based on the model predictive control incorporating two-level state feedback. Taking advantage of the measurable state variables, that is, air gap, electromagnet acceleration, and control current through high-resolution sensor measurement, the first-level nonlinear state feedback is to linearize the unstable nonlinear magnetic levitation system, and the second-level linear state feedback is to further stabilize the system and improve the dynamic performances, which together provide a stable prediction model. The simulation results demonstrate that the proposed control strategy can ensure high-precision air gap control and favorable disturbance resistance ability.

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Optimization on Size of Halbach Array Permanent Magnets for Magnetic Levitation System for Permanent Magnet Maglev Train

IEEE Access ◽

10.1109/access.2021.3058124 ◽

2021 ◽

Vol 9 ◽

pp. 44989-45000

Author(s):

Yang Jiang ◽

Yongfang Deng ◽

Penghua Zhu ◽

Munan Yang ◽

Fazhu Zhou

Keyword(s):

Permanent Magnet ◽

Permanent Magnets ◽

Magnetic Levitation ◽

Maglev Train ◽

Halbach Array ◽

Levitation System ◽

Magnetic Levitation System

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Maglev Technology and the World Scenario

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.38663 ◽

2021 ◽

Vol 9 (10) ◽

pp. 1594-1600

Author(s):

S Anurag

Keyword(s):

Developing Countries ◽

Magnetic Levitation ◽

Superconducting Magnets ◽

Maglev Train ◽

Linear Induction ◽

Levitation System ◽

The World ◽

Magnetic Levitation System ◽

Side Walls

Abstract: In this growing world when cities and towns continue to become more crowded , the modes of transportation that are currently available to us will not be able to handle the demands of these overpopulated areas. This problem can be solved by the concept of electromagnetism. Electromagnets and superconducting magnets have allowed us to create a magnetic levitating train nicknamed “Maglev” which reduces friction between track and train by floating over it instead of directly being in contact. This has a lot of potentials to create trains that require a high initial investment but later on low maintenance and helps in fast transportation thus saving time. The magnetic levitation system used by these trains play an important role in suspending the Maglev train stably and following the track quickly with the adequate gap from the side walls thus highly reducing chances of damage. This paper gives an idea about the tech aspects of maglev projects worldwide such as Germany, Japan, and USA and also discusses about various idea to bring Maglev trains in developing countries like India. Keywords: Maglev, superconducting magnets, magnetic levitation, Transrapid, lateral guidance, linear induction morot, frictionless travel.

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A New Strategy for Improving the Tracking Performance of Magnetic Levitation System in Maglev Train

Symmetry ◽

10.3390/sym11081053 ◽

2019 ◽

Vol 11 (8) ◽

pp. 1053 ◽

Cited By ~ 2

Author(s):

Mingda Zhai ◽

Zhiqiang Long ◽

Xiaolong Li

Keyword(s):

Mathematical Model ◽

Magnetic Levitation ◽

Tracking Performance ◽

New Method ◽

Maglev Train ◽

Running Speed ◽

Levitation System ◽

New Strategy ◽

Magnetic Levitation System ◽

Track Irregularity

The maglev train is a whole new method of transportation without wheels, consisting of 20 groups of symmetry suspension units. The magnetic levitation system plays a major role in suspending the maglev train stably and following the track quickly with the desired gap. However, vertical track irregularity in the maglev train line has a dreadful effect on the tracking performance of the magnetic levitation system. The investigations carried out by our team have revealed that the fluctuation of the suspension gap becomes more and more serious with increases in running speed. In this paper, a mathematical model with consideration of vertical track irregularity is established. In order to overcome and suppress the fluctuation of the suspension gap, we propose a new strategy which includes installing an accelerometer on the electromagnet to address this problem. This strategy has already been successfully implemented and applied to the suspension controller for a magnetic levitation system in the Changsha maglev express. Real operation data indicates the tracking performance of the magnetic levitation system was obviously improved.

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