Abstract
In this paper, we propose a novel radial four-pole three degrees of freedom (3-DOF) hybrid magnetic bearing (HMB) with radial independent magnetic circuit. The radial control core is composed of two cores with two poles to realize the natural decoupling of the radial 2-DOF suspension force. The mathematical models of radial and axial suspension force are derived based on the equivalent magnetic circuit, and then the prototype is evaluated by three-dimensional finite element analysis. The magnetic circuits, suspension mechanism and mathematical models are verified. The research results have shown that the suspension forces in the X and Y directions decouple well and the proposed HMB has better static and dynamic performances.
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