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

Wan-Tsun Tseng

doi:10.1155/2013/850615

Abstract

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.

Highlights

High-speed maglev systems for public transportation have been introduced for a long time
The propulsion system of the high-speed maglev train is devised to operate in different modes, depending on whether it is used in a short- or long-distance line
The propulsion technology of high-speed maglev systems using the change-step mode has been described in this paper

Summary

Introduction

High-speed maglev systems for public transportation have been introduced for a long time. Typical examples are the Transrapid series in Germany [1,2,3,4] and the MLX series in Japan [5,6,7] Both propulsion systems operate with long stator linear synchronous motors [8,9,10,11]. The propulsion system needs a high thrust to accelerate the train at startup so that the stator sections are connected using a three-step structure. This three-step structure consists of three sets of converter and power-cable systems [10, 12]. These influential parameters will be quantified in the following analysis

Description of Chagne-Step Mode

Three Operation Modes

Calculation of Thrust Drop

Results and Discussion

Conclusions