When the radial displacement sensor of the bearingless permanent magnet slice motor (BPMSM) produces detection errors

the rotor will be in a static eccentric state

which introduces redundant current components into the control system

reducing efficiency and accelerating temperature rise. Existing methods fail to determine the specific direction and magnitude of the eccentricity

and suffer from algorithmic complexity and long correction times. To address these issues

this paper proposes a novel correction method capable of calculating the eccentric point through suspension currents for precise compensation. Firstly

the mathematical model of the BPMSM is derived in the rotor coordinate system. Secondly

this model is combined with finite element simulation to extract the anti-eccentric current components

thereby determining the compensation points. Then

a cyclic algorithm that introduces step tracking of the minimum current is applied in the vicinity of these points. Finally

the efficiency and effectiveness of the proposed method are validated through both simulations and experiments.