A tubular linear motor structure suitable for large thrust

In response to the problem that the motor shaft of conventional tubular linear motor is prone to bending, this paper proposes a new tubular linear motor structure for large thrust demand. Bending of the motor shaft can lead to collisions between structures and affect motor performance, and traditional air-gap structures cannot effectively handle this problem. The stator of the new motor is divided into an inner and outer cylinder structure. The armature windings are arranged between the inner and outer cylinders. The permanent magnets are arranged on the motor shaft. After analysis, the structural proposed in this paper can well stop the bending of the motor shaft. It also effectively improves the problem of large fluctuations in the thrust of linear motors. Finally, it is concluded that the peak motor thrust is maximized when the material with low permeability is chosen for the inner cylinder.