Add method to calculate the initial magnetization curve based on measurements

examples/get_initial_magnetization_curve.py

@@ -0,0 +1,38 @@
+
+"""Example to get the initialization magnetization curve from data, if data are available."""
+
+import logging
+
+
+# Debug
+import matplotlib.pyplot as plt
+
+# own libraries
+import materialdatabase as mdb
+
+# configure logging to show terminal output
+logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.INFO)
+
+def get_datasheet_curve_example():
+    """get_datasheet_curve() example."""
+    # init a material database instance
+    mdb_data = mdb.Data()
+    material_name = mdb.Material.N49
+
+    # Initial magnetization curve at 25 degree
+    df_init_mag_curve_25 = mdb_data.get_initial_magnetization_curve(material_name, 500, 25)
+    # Initial magnetization curve at 100 degree
+    df_init_mag_curve_100 = mdb_data.get_initial_magnetization_curve(material_name, 500, 100)
+    # Interpolated initial magnetization curve at 40 degree
+    df_init_mag_curve_40 = mdb_data.get_initial_magnetization_curve(material_name, 500, 40)
+
+    # plot all curves
+    plt.plot(df_init_mag_curve_25["h"], df_init_mag_curve_25["b"], 'o', label='at 25°')
+    plt.plot(df_init_mag_curve_100["h"], df_init_mag_curve_100["b"], 'o', label='at 100°')
+    plt.plot(df_init_mag_curve_40["h"], df_init_mag_curve_40["b"], 'o', label='at 40°')
+    plt.legend()
+    plt.show()
+
+
+if __name__ == "__main__":
+    get_datasheet_curve_example()

materialdatabase/data/datasheet_curves/N27/b_over_h_at_f_T.csv

@@ -0,0 +1,130 @@
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materialdatabase/data/datasheet_curves/N27/general_information.csv

@@ -0,0 +1,2 @@
+application,material,initial permeability,curie temperature in C,density in kg/m^3,resistivity in Ohm m,saturation flux density in T at 25 C,saturation flux density in T at 100 C
+power conversion,MnZn,2000,220,4800,3,0.5,0.41

materialdatabase/data/datasheet_curves/N30/b_over_h_at_f_T.csv

@@ -0,0 +1,116 @@
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materialdatabase/data/datasheet_curves/N30/general_information.csv

@@ -0,0 +1,2 @@
+application,material,initial permeability,curie temperature in C,density in kg/m^3,resistivity in Ohm m,saturation flux density in T at 25 C,saturation flux density in T at 100 C
+power conversion,MnZn,4300,130,4900,0.5,0.38,0.24