/// <summary>
/// Build Stator in FEMM
/// </summary>
/// <param name="MaterialParams"></param>
public override void BuildInFEMM(FEMM femm = null)
{
if (femm == null)
{
femm = FEMM.DefaultFEMM;
}
AbstractRotor Rotor = Motor.Rotor;
bool fullbuild = Motor.GeneralParams.FullBuildFEMModel;
// create material
femm.mi_addmaterialSteel(SteelMaterialName, 1, 1, Lam_d, Lam_fill, FEMM.LaminationType.NotLaminated,
BH.Select(p => p.b).ToArray(), BH.Select(p => p.h).ToArray());
femm.mi_addmaterialCopper(WireMaterialName, WireConduct, WireType, 1, WireDiameter);
// create boundary
femm.mi_addboundprop_Prescribed_A(BoundaryProperty, 0, 0, 0, 0);
/////// Build half slot
////segments - lines
femm.mi_addSegmentEx(xB, yB, xC, yC, Group_Lines_Stator); //BC
femm.mi_addSegmentEx(xD, yD, xE, yE, Group_Lines_Stator); //DE
femm.mi_addSegmentEx(xF, yF, xF, 0, Group_Lines_Stator); //FF1
if (yC != yCC)
{
femm.mi_addSegmentEx(xC, yC, xCC, yCC, Group_Lines_Stator);//CC'
}
//// arcsegments
//BA
double a = (Math.Atan(yA / xA) - Math.Atan(yB / xB)) * 180 / Math.PI;
femm.mi_addArcEx(xB, yB, xA, yA, a, 1, Group_Lines_Stator);
//DC'
femm.mi_addArcEx(xD, yD, xCC, yCC, 90, 30, Group_Lines_Stator);
//EF
femm.mi_addArcEx(xF, yF, xE, yE, 90, 30, Group_Lines_Stator);
//// the coil
femm.mi_addSegmentEx(xD2, yD2, xE2, yE2, Group_Lines_Stator);
femm.mi_addSegmentEx(xF2, yF2, xF2, 0, Group_Lines_Stator);
femm.mi_addSegmentEx(xCC2, yCC2, xCC2, 0, Group_Lines_Stator);
//CC2-D2
femm.mi_addArcEx(xD2, yD2, xCC2, yCC2, 90, 30, Group_Lines_Stator);
//EF
femm.mi_addArcEx(xF2, yF2, xE2, yE2, 90, 30, Group_Lines_Stator);
////// mirrored half to one
femm.mi_clearselected();
femm.mi_selectgroup(Group_Lines_Stator);
femm.mi_mirror(0, 0, 1, 0, FEMM.EditMode.group);
//////// Build Q slots (copy)
femm.mi_clearselected();
femm.mi_selectgroup(Group_Lines_Stator);
femm.mi_selectgroup(Group_BlockLabel_Wire);
if (fullbuild)
{
femm.mi_copyrotate(0, 0, 360.0 / Q, Q - 1, FEMM.EditMode.group);
}
else
{
femm.mi_copyrotate(0, 0, 360.0 / Q, Q / (2 * Rotor.p) - 1, FEMM.EditMode.group);
// rotate so they match with rotor
femm.mi_clearselected();
femm.mi_selectgroup(Group_Lines_Stator);
femm.mi_selectgroup(Group_BlockLabel_Wire);
// rotate angle to
double shiftangle = -Rotor.alphaDegree + 180.0 / Q;
femm.mi_moverotate(0, 0, shiftangle, FEMM.EditMode.group);
}
////// Block labels (steel)
femm.mi_addBlockLabelEx((xF + Rstator) / 2, 0, SteelMaterialName, Group_BlockLabel_Steel);
/////// Stator outer lines (2 arcs)
if (fullbuild)
{
femm.mi_addArcEx(Rstator, 0, -Rstator, 0, 180, 10, Group_Lines_Stator);
femm.mi_addArcEx(-Rstator, 0, Rstator, 0, 180, 10, Group_Lines_Stator);
}
else
{
femm.mi_addArcEx(Rstator * Math.Cos(Rotor.alpha), -Rstator * Math.Sin(Rotor.alpha),
Rstator * Math.Cos(Rotor.alpha), Rstator * Math.Sin(Rotor.alpha), 2 * Rotor.alphaDegree, 10, Group_Lines_Stator);
}
// Set boundary condition for outline stator
femm.mi_clearselected();
if (fullbuild)
{
femm.mi_selectarcsegment(0, Rstator);
femm.mi_selectarcsegment(0, -Rstator);
}
else
{
femm.mi_selectarcsegment(Rstator, 0);
}
femm.mi_setarcsegmentprop(10, BoundaryProperty, false, Group_Lines_Stator);
/////// Wire, circuits in slot
foreach (Circuit c in circuits)
{
femm.mi_addcircprop(c.name, c.current, c.circuitType);
}
double r = (xD + xE) / 2;
foreach (Coil sci in coils)
{
int i = coils.IndexOf(sci);
if (fullbuild)
{
//angle go clockwise from 3 o'clock (=0 degree in decarter),
double aa = -2 * Math.PI * i / Q;
double x = r * Math.Cos(aa);
double y = r * Math.Sin(aa);
femm.mi_addBlockLabelEx(x, y, WireMaterialName, Group_BlockLabel_Wire, sci.inCircuit, sci.Nturns);
}
else
{
//angle go clockwise from 3 o'clock (=0 degree in decarter), shift +pi/Q (to match rotor)
int nn = Q / (2 * Rotor.p);
double aa = -2 * Math.PI * i / Q + (nn % 2 == 0 ? Math.PI / Q : 0);
double x = r * Math.Cos(aa);
double y = r * Math.Sin(aa);
if (aa > -Rotor.alpha || aa < -2 * Math.PI + Rotor.alpha)
{
femm.mi_addBlockLabelEx(x, y, WireMaterialName, Group_BlockLabel_Wire, sci.inCircuit, sci.Nturns);
}
}
}
if (fullbuild)
{
//pre-rotate stator (fullbuild only)
femm.mi_clearselected();
femm.mi_selectgroup(Group_Lines_Stator);
femm.mi_selectgroup(Group_BlockLabel_Wire);
femm.mi_selectgroup(Group_BlockLabel_Steel);
femm.mi_moverotate(0, 0, PreRotateAngle, FEMM.EditMode.group);
}
if (!fullbuild)
{
//build boundary of motor: 2 lines, anti-periodic
String boundaryName = "stator-apb-1";
double x1 = Rinstator * Math.Cos(Rotor.alpha);
double y1 = Rinstator * Math.Sin(Rotor.alpha);
double x2 = Rstator * Math.Cos(Rotor.alpha);
double y2 = Rstator * Math.Sin(Rotor.alpha);
femm.mi_addSegmentEx(x1, y1, x2, y2, Group_Lines_Stator);
femm.mi_addSegmentEx(x1, -y1, x2, -y2, Group_Lines_Stator);
femm.mi_addboundprop_AntiPeriodic(boundaryName);
femm.mi_clearselected();
femm.mi_selectsegment(x2, y2);
femm.mi_selectsegment(x2, -y2);
femm.mi_setsegmentprop(boundaryName, 0, true, false, Group_Lines_Stator);
}
}
/// <summary>
/// Call this AFTER rotating rotor to make sure boundary conditional in airgap is solid
/// Assuming the file FEMM was created using the same motor
/// </summary>
public override void AddBoundaryAtAngle(double rotateAngleDeg, FEMM femm = null)
{
if (Motor.GeneralParams.FullBuildFEMModel)
{
return;
}
if (femm == null)
{
femm = FEMM.DefaultFEMM;
}
var Rotor = Motor.Rotor;
var Stator = Motor.Stator;
//build boundary of motor: 2 lines, anti-periodic
String[] boundaryNames = new String[] { "airgap-apb-1", "airgap-apb-2", "airgap-apb-3" };
int[] Group_Lines = { Group_Lines_Airgap + 1,
Group_Lines_Airgap + 2,
Group_Lines_Airgap + 3 };
// re-add boundary (airgap)
double rotateAngleRad = rotateAngleDeg * Math.PI / 180;
double x1 = Rotor.RGap * Math.Cos(Rotor.alpha + rotateAngleRad);
double y1 = Rotor.RGap * Math.Sin(Rotor.alpha + rotateAngleRad);
double x2 = (Rotor.RGap + delta / 2) * Math.Cos(Rotor.alpha + rotateAngleRad);
double y2 = (Rotor.RGap + delta / 2) * Math.Sin(Rotor.alpha + rotateAngleRad);
double x3 = (Rotor.RGap + delta / 2) * Math.Cos(Rotor.alpha);
double y3 = (Rotor.RGap + delta / 2) * Math.Sin(Rotor.alpha);
double x4 = Stator.RGap * Math.Cos(Rotor.alpha);
double y4 = Stator.RGap * Math.Sin(Rotor.alpha);
// add segment
femm.mi_addSegmentEx(x1, y1, x2, y2, Group_Lines[0]);
femm.mi_addSegmentEx(x3, y3, x4, y4, Group_Lines[2]);
femm.mi_addArcEx(x3, y3, x2, y2, rotateAngleDeg, 1, Group_Lines[1]);
// add boundary
foreach (String bn in boundaryNames)
{
femm.mi_addboundprop_AntiPeriodic(bn);
}
// set boundary
for (int i = 0; i < Group_Lines.Count(); i++)
{
femm.mi_clearselected();
femm.mi_selectgroup(Group_Lines[i]);
femm.mi_setsegmentprop(boundaryNames[i], 0, true, false, Group_Lines[i]);
femm.mi_setarcsegmentprop(1, boundaryNames[i], false, Group_Lines[i]);
}
// copy boundary
femm.mi_clearselected();
femm.mi_selectgroup(Group_Lines[0]);
femm.mi_selectgroup(Group_Lines[1]);
femm.mi_selectgroup(Group_Lines[2]);
femm.mi_copyrotate(0, 0, -2 * Rotor.alphaDegree, 1, FEMM.EditMode.group);
// special case: airgap becomes 2 sections
if (Math.Abs(Math.Abs(rotateAngleDeg) - 2 * Rotor.alphaDegree) < 1e-8)
{
double x = (Rotor.RGap + delta * 0.2) * Math.Cos(rotateAngleRad);
double y = (Rotor.RGap + delta * 0.2) * Math.Sin(rotateAngleRad);
femm.mi_addBlockLabelEx(x, y, AirMaterialName, Group_Fixed_BlockLabel_Airgap);
}
base.AddBoundaryAtAngle(rotateAngleDeg, femm);
}
