Mechanical Characteristics of Radial Magnetic Bearing |
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| Authors: | ZHANG Gang YU Lie XIE You-bai School of Electromechanical Engineering and Automation Shanghai University Shanghai China Xian Jiaotong University Xian China |
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| Institution: | ZHANG Gang,YU Lie,XIE You-bai School of Electromechanical Engineering and Automation,Shanghai University,Shanghai 200072,China, Xian Jiaotong University Xian 710049,China |
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| Abstract: | This paper is based on the example of a radial magnetic bearing possessed of eight-pole, and derives the calculation formulas of static and dynamic mechanical characteristics of the bearing, in which the shape and curvature of surface, eccentricity and tilt of the journal are taken into account. Variations of the static and dynamic characteristics of the radial magnetic bearing versus static tilt parameters of journal are discussed. The outcomes show that the static tilt of the journal has influence on the mechanical characteristics of radial magnetic bearing, and change the static load capacity between two radial magnetic bearings and exert coupling effect between them. To study the dynamics of a practical rotor-magnetic bearing system, at least six stiffness coefficients in each radial magnetic bearing must be considered in ideal case, and twelve stiffness coefficients must be considered in general case of tilting journal. Such a find can be used for the coupled electromechanical dynamics analysis of rotor system equipped with magnetic bearings. |
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| Keywords: | mechanical characteristics radial magnetic bearing stiffness coefficient |
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