Characteristic Analysis of a Linear Induction Motor for 200-km/h Maglev

Abstract

As a result of the current population concentrations in urban centers, demand for intercity transportation is increasing rapidly. Railway transportation is becoming popular as an intercity transportation because of its timely service, travel speeds and transport efficiency. Among the many railway systems, the innovative and environmentally friendly maglev system has been rated very highly as the next-generation intercity railway system. Linear induction motors are widely used for the propulsion of maglev trains because of their light weight and low construction costs. The urban maglev that was recently completed in Incheon airport site employs a 110km/h class linear induction motor. However, this system was designed to meet requirements for inner-city operations and is not suitable as an intercity transportation system, which requires medium to high speeds. Therefore, this study deals with the characteristics and designs of linear induction motors used for the propulsion of maglev trains that can be used as intercity trains. Rail car specifications for highspeed trains have been presented, and the characteristics of linear induction motors that can be used for the propulsion of these trains have been derived using the finite element method (FEM).

Linear Induction Motors in Transportation Systems

“…In recent decades, LIM modeling and analysis started relying more on FEA simulations instead of analytical solutions [55,[65][66][67][68][69]. Electromagnetic FEA calculations are crucial to optimizing LIM system performance as they can provide results necessary for predicting the end-effect shaped mechanical characteristic-force versus speed.…”

Impact of stator slot geometry on the windage loss in a high‐speed linear switched reluctance motor

“…Typical specifications of the Maglev train and the Linear Motor used are discussed in [1]. In view of prototype testing, the specifications of the motor have been scaled down by 2 times to a maximum velocity of 27.8 m/s, with a voltage of 415 V AC and a propulsion force of 142 N. From the specifications (Table 1) and using Equation () [33], the design of the machine is started. where F —propulsion force in N and V —velocity in m/s.…”

“…One major application of linear electric motors is magnetically levitated trains [1,2]. While many motor topologies are applicable for this, the linear switched reluctance motor (LSRM) is more suitable.…”

2-D quasi-static Fourier series solution for a linear induction motor

“…The established analytical models of the LIM typically express the excitation currents in the primary coils as infinitely thin current sheet (Nasar and Boldea, 1976; Yamamura, 1979; Freeman and Lowther, 1973; Mosebach et al , 1977; Pierson et al , 1977; Freeman and Papageorgiou, 1978; Gieras et al , 1985; Gieras et al , 1986; Mendrela and Gierczak, 1982). However, in recent decades, LIM modeling and analysis started relying more on finite element analysis (FEA) simulations, such as in studies by Lee et al (2009); Shiri and Shoulaie (2012); Singh et al (2013); Amiri and Mendrela (2014); Abdollahi et al (2015); Jeong et al (2015), instead of analytical solutions. The analytical approach presented here is similar, in particular, to the work first presented by Freeman and Papageorgiou (1978) and Mendrela and Gierczak (1982), where models of the LIM with current sheet finite primary excitations were presented using Fourier transforms and series methods, respectively.…”