Stability of Electrodynamic Maglev Vehicles Propelled by Permanent-Magnet Linear Electric Motors

The search for fast and efficient transportation systems has raised the interest in magnetic levitation technologies over the last decades. In this context, the Hyperloop concept has been conceived as a solution for future mobility. However, the stability of the electrodynamic levitation system represents a key enabling technology for the Hyperloop implementation. In this context, the state of the art has addressed the full stabilization of downscaled vehicles, where levitation and guidance are provided by electrodynamic means. This is achieved passively by introducing a proper amount of damping into the system. Nevertheless, this system stability could be affected when using permanent-magnet propulsion motors. In this perspective, we propose the stabilization of a downscaled vehicle under the influence of its propulsion system. To this end, a permanent-magnet linear synchronous motor is designed. Its stiffness contribution is evaluated and introduced into the vehicle model. Then, its impact on the stability and performance of the system is discussed in detail.