Research on the Dynamic Characteristics of Axial-Radial Magnetic Bearing Considering Eddy Current Effects and Leakage Effects

Homopolar permanent magnet biased axial-radial magnetic bearing (MB) has been widely used in the field of high-speed motors due to their low hysteresis loss. In order to analyze the dynamic characteristics of a homopolar axial-radial magnetic bearing, a magnetic circuit model considering eddy current effect and leakage effect is proposed. Based on the mixture of solid and laminated materials, the eddy current effect of different materials is discussed. The dynamic characteristics of the structure are verified by comparing the finite element simulation with the magnetic circuit method.