Calculating the Properties for a Linear Permanent Magnet

Edit a linear demagnetization curve is simple. From the View/Edit Materials window:

  1. Set the Relative Permeability to Simple.

    2. This enables the Calculate Properties for Permanent Magnet drop-down menu at the bottom of the window.

  2. Click Permanent Magnet from the drop down menu.

    3. This displays the Properties for Permanent Magnet window. This contains the following fields.


    Mu (enabled by default)

    Provide a value.

    Hc (enabled by default)

    Coercive field force Hc in the units specified. Provide a value and select units from the drop down menu.

    Br/Mp (disabled by default)

    Checking this enables the radio buttons that let you specify either Br or Mp.

    Br

    Residual flux density Br, in Tesla.

    If enabled, provide a value and select units from the drop down menu.

    Mp

    If enabled, provide a value and select units form the drop down menu.

  3. Click OK to close the dialog and return to the View/Edit Materials window.

The values for Relative Permeability and Magnitude under Magnetic Coercivity are updated as new default values.

Note: The accuracy in inputting the characteristic parameters for the permanent-magnetic material has significant effect on the correctness of the analyses to the electromagnetic characteristics of the electric machine. It is suggested that users should input the characteristic parameters of the permanent-magnetic material according to the accurate data provided by the manufacturers of materials. RMxprt provides a few characteristic parameters of permanent-magnetic materials for reference.