Open AccessAnalysis of forces in single‐side linear induction motor with lateral displacement for linear metro
Author(s) -
Lv Gang,
Liu Zhiming,
Sun Shouguang
Publication year - 2016
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2014.0441
Subject(s) - linear induction motor , displacement (psychology) , linear acceleration , linear motor , induction motor , structural engineering , control theory (sociology) , mechanics , engineering , physics , classical mechanics , computer science , mechanical engineering , acceleration , electrical engineering , voltage , psychology , control (management) , artificial intelligence , psychotherapist
This study investigates the influence of lateral displacement of the primary on the thrust, vertical and lateral forces in a single‐side linear induction motor for linear metro. A three‐dimensional analytical model, which is able to consider the longitudinal and transversal end effects, overhang of the primary windings and lateral displacement, is developed to obtain the air‐gap flux density distributions along longitudinal and transverse directions as well as forces. Variations of the thrust, vertical and lateral forces with the lateral displacements are comprehensive investigated when the motor is torque motoring, negative sequence braking or regenerative braking operation. The analytically predicted results are experimentally validated by measurements on reciprocal power‐fed test rig. It shows that the thrust and vertical force of single‐side linear induction motor decrease almost linearly with the increase of the lateral displacement in all regions, and lateral force is restoring which helps centralising the railcar in the regenerative braking and most parts of motoring regions.