Trajectory control of controlled-PM linear synchronous motor magnetic levitation vehicle—FEM dynamics simulations and experiments in mass-reduced-control mode

1996 ◽  
Vol 116 (4) ◽  
pp. 120-131 ◽  
Author(s):  
Kinjiro Yoshida ◽  
Hiroshi Takami ◽  
Dai Yokota ◽  
Mitsumasa Nishitani ◽  
Akihiro Sonoda
Keyword(s):  
Magnetic Levitation ◽  
Synchronous Motor ◽  
Trajectory Control ◽  
Control Mode ◽  
Linear Synchronous Motor ◽  
Dynamics Simulations

scholarly journals A new concept of modular magnetic levitation train for urban transport

2018 ◽  
Vol 4 (2) ◽  
pp. 107-119
Author(s):  
Maurizio Cavagnaro ◽  
Vincenzo Delle Site
Keyword(s):  
Permanent Magnets ◽  
Magnetic Levitation ◽  
Low Cost ◽  
National Research Council ◽  
Synchronous Motor ◽  
Urban Transport ◽  
Guidance System ◽  
Design Data ◽  
Linear Synchronous Motor ◽  
Repulsive Forces

Aim: The aim of our project is to solve all technological and functional problems related to the development of the suspended urban Maglev, while maintaining the requirement of simplicity and low cost of construction, operation and maintenance. Both the infrastructure and the vehicle are designed to be industrially produced and assembled on site. Methods of the studies: Our study is based on the theoretical and experimental results obtained during a project of the Italian National Research Council, concerning the performances of opposing permanent magnets, the design of the linear synchronous motor and the possible solutions for realizing the guidance system. On the basis of these results the study of the suspended system was carried out. Results: The paper describes the suspended urban Maglev with PM/PM primary suspension (with opposing permanent magnets) and proposes a mechanical guidance system that uses for stabilization the same repulsive forces between permanent magnets. We also propose a new configuration with HTS/PM primary suspension (with high temperature superconductors opposed to permanent magnets), evaluating pros and cons of this solution. Finally we provide design data on the linear synchronous motor suitable for our system. Conclusion: This paper describes our proposal for a suspended urban Maglev using permanent magnets; our interest focuses on the need to further develop industrially feasible solutions, easy to build and manage, in order to propose a system that is also commercially viable and competitive. The identified advantages justify further studies.

scholarly journals Thrust Reduction of Magnetic Levitation Vehicle Driven by Long Stator Linear Synchronous Motor

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Wan-Tsun Tseng
Keyword(s):  
High Speed ◽  
Magnetic Levitation ◽  
Synchronous Motor ◽  
Long Distance ◽  
Operation System ◽  
Linear Synchronous Motor ◽  
Vehicle Data ◽  
Study Results ◽  
Train Speed ◽  
Linear Synchronous Motors

The propulsion technology of long stator linear synchronous motors is used to drive high-speed maglev trains. The linear synchronous motor stator is divided into sections placed on guideway. The electric power supplies to stator sections in which the train just passes in change-step mode for long-distance operation. However, a thrust drop will be caused by change-step machinery for driving magnetic vehicle. According to the train speed and vehicle data, the change-step mode has three types of operation, namely premature commutation, simultaneous commutation, and late commutation. Each type of operation has a different thrust drop which can be affected by several parameters such as jerk, running speed, motor section length, and vehicle data. This paper focuses on determining the thrust drop of the change-step mode. The study results of this paper can be used to improve the operation system of high-speed maglev trains.

Research on LSM with Permanent Magnet Halbach and Ironless Coil for Magnetic Levitation Vehicles

2014 ◽  
Vol 701-702 ◽  
pp. 753-756 ◽  
Author(s):  
Xiao Zhang ◽  
Jun Yong Lu ◽  
Xin Lin Long
Keyword(s):  
Permanent Magnet ◽  
Basic Principle ◽  
Magnetic Levitation ◽  
Design Method ◽  
Synchronous Motor ◽  
Propulsion System ◽  
Linear Synchronous Motor ◽  
Halbach Array ◽  
Optimal Value ◽  
Propulsion Force

In this paper, a kind of Linear Synchronous Motor (LSM) with Permanent Magnet (PM) arranged in Halbach array and IronLess Coil (PMH&ILC) is presented for Magnetic Levitation Vehicles (Maglev). First, the propulsion force of this kind of LSM is deduced analytically. Then, the influences of pole spacing, the current in the coil, the width of the motor and the size of the Halbach array on the propulsion force are analyzed mathematically in detail. Based on the results, the design method and basic principle of PMH&ILC-typed LSM are proposed, which shows a better performance with small pole spacing, higher permanent magnet array, optimal value of the width of the permanent magnet Halbach and so on. Finally, a sample LSM system is designed according to the requirements of Maglev propulsion system.

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