Electric Machines

src/material_data/MaterialProperties.toml

@@ -233,6 +233,26 @@ density and 12% higher modulus, as well as other improved properties """
     density = 1700.0
     dielectric_strength = 10e6
 
+# -----------------------------------------------------
+# Electric Steels
+# -----------------------------------------------------
+[M19]
+    description = """29-Gauge M-19 nonoriented steel; 
+                     Data from Ofori-Tenkorang, J., 
+                    “Permanent-Magnet Synchronous Motors and Associated Power Electrics 
+                    for Direct-Drive Vehicle Propulsion,” Ph.D. Dissertation, 
+                    Massachusetts Institute of Technology, Cambridge, MA, 1996."""
+    density = 7750.0 #kg/m3
+    ke = 7.0963515e-5 # W/kg/Hz²/T² = 32.183e-6 W/lb/Hz²/T²
+    kh = 2.351412e-2  # W/kg/Hz = 10.664e-3 W/lb/Hz
+    alpha = 1.793
+[Hiperco50]
+    description = """Hiperco® 50 alloy is an iron-cobalt-vanadium soft magnetic 
+    alloy which exhibits high magnetic saturation (24 kilogauss), 
+    high D.C. maximum permeability, low D.C. coercive force, and low A.C. core loss."""
+    density = 8110.0
+
+
 # -----------------------------------------------------
 # Thermal insulators
 # -----------------------------------------------------

src/misc/materials.jl

@@ -6,7 +6,9 @@
 
 using TOML, DocStringExtensions
 
-export StructuralAlloy, Conductor, Insulator, ThermalInsulator, thermal_conductivity
+export StructuralAlloy, Conductor, Insulator, ElectricSteel, 
+ThermalInsulator, thermal_conductivity
+export resistivity, resxden
 
 __abs_path_prefix__ = dirname(@__DIR__)
 MaterialProperties = TOML.parsefile(joinpath(__abs_path_prefix__,"material_data/MaterialProperties.toml"))
@@ -176,6 +178,56 @@
     end
 
 end
+"""
+$TYPEDEF
+
+ElectricSteel.
+
+$TYPEDFIELDS
+"""
+@kwdef struct ElectricSteel 
+    """Name"""
+    name::String = ""
+    """Density [kg/m³]"""
+    ρ::Float64
+    """Eddy current loss coefficient [W/lbm/Hz²/T²]"""
+    kₑ::Float64
+    """Hysteresis loss coefficient [W/lbm/Hz]"""
+    kₕ::Float64
+    """Exponential fit coefficient for hysteresis loss"""
+    α::Float64
+end
+"""
+    ElectricSteel(material::String)
+
+Outer constructor for `ElectricSteel` types. 
+Material specified needs to have the following data in the database:
+- ρ (density): Density [kg/m³]
+- ke
+- kh
+- α 
+"""
+function ElectricSteel(material::String)
+    local MatProp, ρ, ke, kh, α
+    try
+        MatProp = MaterialProperties[material]
+    catch
+        error("Cannot find $material in Material Properties database")
+    else
+        try
+            ρ = MatProp["density"]
+            ke = MatProp["ke"]
+            kh = MatProp["kh"]
+            α = MatProp["alpha"]
+        catch 
+            error("Insufficient data in database for $material to build a Conductor")
+        else
+            Conductor(material, ρ, ke, kh, α)
+        end
+    end
+
+end
+
 
 """
     resxden(cond::conductor)