| 摘要 |
A linear synchronous motor for a high speed, ground transportation vehicle includes a linear stator assembly that is divided into sections. The stator assembly has an air gap and generates a magnetic field traveling wave therein from a constant frequency alternating current. The traveling wave has variable speeds and accelerations along different sections of the stator. A rotor assembly has a plurality of magnets forming at least one pole-pitch of a variable length. The rotor assembly is coupled to the vehicle and disposed in the air gap of the stator and runs laterally therewith, producing an attractive force between a magnetic field of the rotor and the traveling wave of the stator. The rotor has at least one magnet that includes an upper portion, a lower portion spaced apart from the upper portion, and a nonmagnetic coupler rigidly coupling the upper portion of the magnet to the lower portion. The magnetic field of the rotor propels the vehicle. The magnetic field of the rotor also generates a levitation force levitating the vehicle. A synchronizing unit is operatively associated with the rotor assembly to vary the length of the pole-pitch so that the pole-pitch length is substantially equal to one-half the length of the traveling wave at any given position along the linear stator assembly.
|
