A novel simplified structure for single-drive bearingless motor

This paper presents a novel design of simplified structure in one-axis actively positioned bearingless motor. To enhance torque density, while having extreme high passive stiffness, simple and compact structures are designed. Basic principle of active axial force generation and the calculated results in 3D-FEM analysis are presented. The axial force, torque and passive stiffness are compared in five structures. In addition, a minimization method of an interference torque and force is presented.

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