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An integrated magnetic circuit model and finite element model approach to magnetic bearing design

A code for designing magnetic bearings is described. The code generates curves from magnetic circuit equations relating important bearing performance parameters. Bearing parameters selected from the curves by a designer to meet the requirements of a particular application are input directly by the code into a three dimensional finite element analysis preprocessor. This means that a three dimensional computer model of the bearing being developed is immediately available for viewing. The finite element model solution can be used to show areas of magnetic saturation and make more accurate predictions of the bearing load capacity, current stiffness, position stiffness, and inductance than the magnetic circuit equations did at the start of the design process. In summary the code combines one dimensional and three dimensional modeling methods for designing magnetic bearings.