Elements of linear induction motor design for urban transit

A study has been made on the design of the single-sided linear induction motors(SLIMs) for the urban transit with the maximum speed of 70km/h. The outline of SLIM design is given. The performance characteristics are calculated using a space harmonic analysis presented by the authors. The primary core is designed long, narrow and thin. The motor length of approximately 2.5m would be appropriate for about 40km/h SLIMs. The pole pitch is one of the most important dimensions also. The suitable value will be about 300mm. The flux density should be selected in relatively low value from 0.4T to 0.5T in order to decrease the vertical force as well as the magnetizing current.