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Advanced Magnetics--Step-by-Step Description: Step 14

Now we'll learn how to describe nonlinear magnetic properties by means of editing the B-H curve. To start editing for block label Steel:

1. Double-click the Steel item or click Properties in its context menu. The property editing dialog box appears.

2. Select the Nonlinear box. This causes starting the B-H Curve Editor.

With the Curve Editor, you can simply enter the values from the table, point by point, checking the curve in the graph to the left of the table. The point (0, 0) is always presented in the table, which cannot be edited nor deleted. Since the cursor is already in the box for new B value, you can start entering new points. To create the first point (B = 0.73 T, H = 400 A/m, see the table below):

1. Type 0.73 and press ENTER. The cursor will move to the box for H value.

2. Type 400 and press ENTER. The new point will be added to the table and immediately displayed in the graph. The cursor will return back to the box for B value.

3. Repeat these actions for other points of the table. Points may be entered in any order.

In case of mistyping, the erroneous point would in general produce a noticeable anomaly in the displayed curve. You can select this point in the graph or in the table and then delete it or correct its coordinates.

When you are done with entering points, and the curve looks like classic B-H curve, click the Close button to finish curve editing and return to property editing dialog. Since we do not want to change any more values, click OK button to finish editing data for label Steel.

Repeat the above steps to define the corresponding B-H curve for the Cobalt Alloy label:

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