Abstract of Thesis presented at COPPE/UFRJ as a partial fulfillment of the requirements for the degree of Master of Science (M.Sc.)

Synchronized Operation of Linear Motors for Traction of a Magnetically Levitated Vehicle

Andrei Ernesto Loaiza Luizar

December/2010

Advisor:

Richard Magdalena Stephan

Department:

Eletrical Engineering

      The magnetic levitation train (MagLev-Cobra) presents itself as an innovative solution for urban transportation. The vehicle, consisting of various modules or wagons, uses short primary linear induction motor for traction and braking of each module. In turn, each motor is driven by an electronic inverter.
      The linear motor traction force depends on the air gap and the supply voltage and frequency. Moreover, the force required depends on the mass (number of passengers) and the module position in the trajectory as well as acceleration and braking that it is submitted. The modules will be interconnected through connections of rubber, with mechanical limits for tension and compression.
      In this dissertation, an open-loop control for the synchronization of two modules is proposed. The generalization of the method in the case of 'n' machines will be the subject of future work. In the simulations, different values of the elasticity constant of the rubber interconnection were considered and critical operational cases were analyzed.
      Technological and economic factors indicate a tight coupling as the appropriate solution for the pilot guided operation.