Abstract:

A kind of controllable excitation linear synchronous motor magnetic suspension feed platform is designed, which the platform and the mover of linear synchronous motor are fixed connected, the linear synchronous motor can achieve feeding and levitation of the platform at the same time. The motor stator of controllable excitation linear synchronous motor magnetic suspension feed platform is DC excitation, and the excitation poles and the suspended poles are the same, and the normal force between the poles and the mover core is the suspension force of the platform, which can be changed by adjusting the excitation current; the tangential force of the armature is the electromagnetic force of the platform, which can be changed by adjusting the armature current. In order to obtain the electromagnetic characteristic of controllable excitation linear synchronous motor magnetic suspension feed platform, motion equation and the mathematical model of this platform are established, the electromagnetic thrust and the levitation force are calculated by finite element method based on the mathematical model. The maximum relative error between the theoretical formula and the finite element calculation of electromagnetic thrust is 8.73%, and the maximum relative error between the theoretical formula and the finite element calculation of levitation force is 19.15%. The calculation result shows the feasibility of controllable excitation magnetic suspension feed platform.

Key words: feed platform, finite element calculation, magnetic suspension, controllable excitation