Soft-Magnetic Materials
The stator and the rotor iron cores in the electric machine are generally laminated with punched sheets of nonlinear soft-magnetic silicon steel. Some special types of electric machines, such as moment motor, turbo-generator etc., use integrated solid rotor iron core of soft-magnetic material. For magnetic field analysis and core loss analysis of the electric machine, the magnetization characteristics (B-H Curve) and the loss characteristics (B-P Curve) of the iron-core material must be defined. The dialog boxes to do so are accessed from the View/Edit Material window, which, in turn is accessed from the Edit Libraries window. Access to the window for editing the B-H curve is enabled when you set the Magnetic Permeability value to nonlinear (rather than simple or Anisotropic). When you set the value to nonlinear, the value field changes to a B-H Curve button. Click the B-H curve button to open the window.
For the loss characteristics (B-P Curve), you first set the Core Loss Model of the material to Electrical Steel (rather than None or Power Ferrite) as a material property in the View/Edit Material window. When you do so, this enables the Calculate Properties selection for drop down at the bottom of the window. Select Core Loss Coefficient from the drop down menu to open the B-P Curve window.
Related Topics
Adding New Materials to an RMxprt Project
Setting the Material Threshold for RMxprt
Viewing and Modifying Material Attributes
Exporting Materials to a Library
Calculating Properties for Core Loss in RMxprt (BP Curve)