Study on Improving the Levitation Force for a Maglev Load Reduction Machine

The tiles burning accident may happen with the temperature rising because of the severe friction if the axial load was very big for the thrust bearing. We proposes using maglev technology to reduce the load for the thrust bearing to avoid the accident. Based on the principle of not coupling the original system, a disc electrodynamic maglev machine is designed, which will provides a normal repulsion as the levitation force to offset one part of the axial load for the bearing with the advantages of good self-stability and light secondary. The tangential force generated at the same time and is useless. The electrical and structural parameters both affect two forces. This paper studied the analytical calculation method, the relationship of the two forces, and the energies stored in the air-gap and expended in the secondary. Then the laws of parameters affecting the forces are obtained, which reveal the design method to improve the levitation force and decrease the tangential force. Based on the theoretical research, the Coreless superconductor primary armature is thought most suitable for this machine with higher y-axis component of magnetic field in air-gap. The FEA simulation model is used to verify the theoretical analysis.