Study on Active Vertical Maglev Inductively Coupled Structure for Contactless Rotating Power Transfer System

In this paper, an improved type of the contactless rotating power transfer system with the active vertical maglev structure for rotating applications in the medical field is proposed. The body shape of the rotating equipment is designed as a cavity in which to place the experimental unit, and the rotating equipment is constructed to work in an isolated place. The magnetic field FEM simulation software is used to analyze the different co-constructions of the maglev DC coils and the inductive power transfer AC coils. Moreover, in order to verify the feasibility of the power transmission in the process of rotation, a permanent magnet synchronous motor structure is integrated. The horizontally stable structure is integrated by two permanent maglev layers. To construct an accurate structure, the 3D printing technology is used to print its frame. Based on the experimental results, the maximum output power of the rotary machinery is 139 W with a transmission efficiency of 66.17%. In addition, the maximum transmission efficiency is reached about 72.02% with 109 W output power.