Design and Application of an Ironless Halbach PMLSM Propulsion System for Medium Speed Maglev Vehicle

A novel Maglev system that propelled by permanent magnet ironless linear synchronous motor (PMLSM) has been proposed in China recently. The system is growing as an attractive alternative to medium speed (150-200km/h) Maglev vehicle due to the strong propulsion ability and simple structure. This paper presents the design and application of the ironless Halbach permanent magnet LSM propulsion system for the Maglev vehicle. Schematic structure of the Maglev vehicle and arrangement of the single side long primary ironless Halbach permanent magnet LSM are firstly introduced. Thrust and normal force characteristic of the PMLSM have been firstly analyzed on consideration of unequal pole pitch. The configuration of the ground traction converter and field oriented control strategy of the motor are introduced. Dynamic experiments on the prototype Maglev vehicle have been performed. The experimental results show the feasibility and accuracy of traction system and control scheme for the Maglev vehicle.