Linear Motor Modeling And Semi-physical Simulation Study

Now ,the state of urban traffic deteriorates increasingly.The most important method to resolve the problem of urban trafic is to develop underground and other fast and convient railway traflic.As for railway,it is an available way to how to make train to run more faster. Modern urban transit systems must provide a high level of service with short headways. Thedesign of the route alignment must be flexible and permit steep grades to reduce system cost.Reliable precision stopping at stations under all weather conditions is essential. Motor (LIM) propulsion ideally meets the operating requirements, providing adhesion-independenttransmission of acceleration and brake forces. The topology used is a short vehicle mounted primary and a long track mounted secondary. The effects of the LIM topology must be considered in order to design a viable transit system.thereinto,maglev vehicle is impulsed by linear motor.Some of maglev vehicle are drived by linear induction motor.The thesis analyzes the slip vector control based on linear induction motor in detail, and discusses the SVPWM control strategies used by two-level voltage source inverter in the control system, the thesis simulates whole system, and verifies the control method available.This paper constructs the mathematic models of LIM and its propelling system. The various experiments are performed on the closed loop system to evaluate its performance. The experiment results show that the model basically reflects the main electrical regularity of the LIM system and can satisfy the requirements on testing the hardware controller.