def addLineZZ(n1, n2, group=-1):
if group == -1:
group = femmgroupmode
femm.mi_addsegment(n1.real, n1.imag, n2.real, n2.imag)
# select middle of arc for adding group
n = (n1.real + n2.real) / 2 + ((n1.imag + n2.imag) / 2) * 1j
femm.mi_selectsegment(n.real, n.imag)
femm.mi_setgroup(group)
femm.mi_clearselected()
def deleteProjectile(self):
"""Delete the projectile
Deletes the projectile (drawn) but doesn't erase its properties.
"""
femm.mi_clearselected()
femm.mi_selectgroup(1)
femm.mi_deleteselected()
femm.mi_deletematerial("Projectile")
if self.espace is not None:
femm.mi_addsegment(0, -self.espace, 0, self.espace)
def addLine(r1, phi1, r2, phi2, group=-1):
if group == -1:
group = femmgroupmode
n1 = cmath.rect(r1, rad(phi1))
n2 = cmath.rect(r2, rad(phi2))
femm.mi_addsegment(n1.real, n1.imag, n2.real, n2.imag)
# select middle of arc for adding group
# todo: better guess at point on line (unpredictable if phi1 != phi2)
n = cmath.rect((r1 + r2) / 2., rad((phi1 + phi2) / 2.))
femm.mi_selectsegment(n.real, n.imag)
femm.mi_setgroup(group)
femm.mi_clearselected()
def drawCoil(self):
"""Draw the coil
Draws the coil in the FEMM instance
Raises:
Exception -- The coil is not defined, please call defineCoil before.
"""
if self.Lb is not None:
femm.mi_clearselected()
femm.mi_addmaterial("Cuivre", 1, 1, 0, 0, 1 / self.rho * 10**-6, 0,
0, 1, 3 if self.wire_type == "round" else 6, 0,
0, 1, self.phi)
femm.mi_addnode(self.Rbi, -self.Lb / 2)
femm.mi_addnode(self.Rbo, -self.Lb / 2)
femm.mi_addnode(self.Rbi, self.Lb / 2)
femm.mi_addnode(self.Rbo, self.Lb / 2)
femm.mi_addsegment(self.Rbi, -self.Lb / 2, self.Rbo, -self.Lb / 2)
femm.mi_addsegment(self.Rbo, -self.Lb / 2, self.Rbo, self.Lb / 2)
femm.mi_addsegment(self.Rbo, self.Lb / 2, self.Rbi, self.Lb / 2)
femm.mi_addsegment(self.Rbi, -self.Lb / 2, self.Rbi, self.Lb / 2)
femm.mi_selectnode(self.Rbi, -self.Lb / 2)
femm.mi_selectnode(self.Rbo, -self.Lb / 2)
femm.mi_selectnode(self.Rbi, self.Lb / 2)
femm.mi_selectnode(self.Rbo, self.Lb / 2)
femm.mi_selectsegment(self.Rbi, 0)
femm.mi_selectsegment((self.Rbi + self.Rbo) / 2, -self.Lb / 2)
femm.mi_selectsegment(self.Rbo, 0)
femm.mi_selectsegment((self.Rbi + self.Rbo) / 2, self.Lb / 2)
femm.mi_setgroup(2)
femm.mi_addblocklabel((self.Rbi + self.Rbo) / 2, 0)
femm.mi_selectlabel((self.Rbi + self.Rbo) / 2, -self.Lb / 2)
femm.mi_setblockprop("Cuivre", 0, self.meshsize, "Bobine", 0, 2,
self.n)
femm.mi_clearselected()
else:
raise Exception("No coil defined.")
def drawProjectile(self):
"""Draw projectile
Draws the projectil in the FEMM instance
Raises:
Exception -- Projectile is not defined
"""
if self.Lp is not None:
femm.mi_addmaterial("Projectile", self.mu, self.mu, 0, 0, 0, 0, 0,
1, 0, 0, 0)
femm.mi_clearselected()
femm.mi_addnode(0, -self.Lp / 2)
femm.mi_addnode(self.Rp, -self.Lp / 2)
femm.mi_addnode(0, self.Lp / 2)
femm.mi_addnode(self.Rp, self.Lp / 2)
femm.mi_addsegment(0, -self.Lp / 2, self.Rp, -self.Lp / 2)
femm.mi_addsegment(self.Rp, -self.Lp / 2, self.Rp, self.Lp / 2)
femm.mi_addsegment(self.Rp, self.Lp / 2, 0, self.Lp / 2)
femm.mi_addsegment(0, self.Lp / 2, 0, -self.Lp / 2)
femm.mi_selectnode(0, -self.Lp / 2)
femm.mi_selectnode(self.Rp, -self.Lp / 2)
femm.mi_selectnode(0, self.Lp / 2)
femm.mi_selectnode(self.Rp, self.Lp / 2)
femm.mi_selectsegment(0, 0)
femm.mi_selectsegment(self.Rp / 2, -self.Lp / 2)
femm.mi_selectsegment(self.Rp, 0)
femm.mi_selectsegment(self.Rp / 2, self.Lp / 2)
femm.mi_setgroup(1)
femm.mi_addblocklabel(self.Rp / 2, 0)
femm.mi_selectlabel(self.Rp / 2, 0)
femm.mi_setblockprop("Projectile", 0, self.meshsize, "<None>", 0,
1, 0)
femm.mi_clearselected()
else:
raise Exception("No projectile defined.")
def drawroundedcorner_box(femm, group, width, length, x_center, y_center,
corner_radius, one_sided):
x1 = x_center - width / 2
y1 = y_center - length / 2
x2 = x1 + width
y2 = y1 + length
# mc = .02 * inches
mc = corner_radius
# first create nodes at the 4 corners
# because they will be joined by an arc segment
c1_x = x1
c1_y = y1
c2_x = x2
c2_y = y1
c3_x = x2
c3_y = y2
c4_x = x1
c4_y = y2
# now make blunted edge magnet based on it
n1x = c1_x
n1y = c1_y + mc
n2x = c1_x + mc
n2y = c1_y
n3x = c2_x - mc
n3y = c2_y
n4x = c2_x
n4y = c2_y + mc
n5x = c3_x
n5y = c3_y - mc
n6x = c3_x - mc
n6y = c3_y
n7x = c4_x + mc
n7y = c4_y
n8x = c4_x
n8y = c4_y - mc
# If drawing all 4 corners
if (one_sided == 0):
femm.mi_addnode(n1x, n1y)
femm.mi_addnode(n2x, n2y)
femm.mi_addnode(n3x, n3y)
femm.mi_addnode(n4x, n4y)
femm.mi_addnode(n5x, n5y)
femm.mi_addnode(n6x, n6y)
femm.mi_addnode(n7x, n7y)
femm.mi_addnode(n8x, n8y)
femm.mi_addarc(n1x, n1y, n2x, n2y, 90, 3)
femm.mi_addsegment(n2x, n2y, n3x, n3y)
femm.mi_addarc(n3x, n3y, n4x, n4y, 90, 3)
femm.mi_addsegment(n4x, n4y, n5x, n5y)
femm.mi_addarc(n5x, n5y, n6x, n6y, 90, 3)
femm.mi_addsegment(n6x, n6y, n7x, n7y)
femm.mi_addarc(n7x, n7y, n8x, n8y, 90, 3)
femm.mi_addsegment(n8x, n8y, n1x, n1y)
femm.mi_clearselected()
# femm.mi_drawrectangle(x1, mag_y1, mag_x2, mag_y2)
# femm.mi_selectrectangle(x1, mag_y1, mag_x2, mag_y2,0)
femm.mi_selectsegment(c1_x, c1_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c1_x + width / 4, c1_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c2_x, c2_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c3_x, c3_y + length / 2)
femm.mi_setgroup(group)
femm.mi_selectsegment(c3_x, c3_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c3_x - width / 4, c3_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c4_x, c4_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c4_x, c4_y - length / 2)
femm.mi_setgroup(group)
#femm.mi_clearselected()
# if drawing only rounded corners on far side
# because location is on axis.
if (one_sided == 1):
femm.mi_addnode(c1_x, c1_y)
femm.mi_addnode(n3x, n3y)
femm.mi_addnode(n4x, n4y)
femm.mi_addnode(n5x, n5y)
femm.mi_addnode(n6x, n6y)
femm.mi_addnode(c4_x, c4_y)
femm.mi_addsegment(c4_x, c4_y, c1_x, c1_y)
femm.mi_addsegment(c1_x, c1_y, n3x, n3y)
femm.mi_addarc(n3x, n3y, n4x, n4y, 90, 3)
femm.mi_addsegment(n4x, n4y, n5x, n5y)
femm.mi_addarc(n5x, n5y, n6x, n6y, 90, 3)
femm.mi_addsegment(n6x, n6y, c4_x, c4_y)
femm.mi_clearselected()
femm.mi_selectsegment(c1_x, c1_y + length / 2)
femm.mi_setgroup(group)
femm.mi_selectsegment(c1_x + width / 2, c1_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c2_x, c2_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c2_x, c2_y + length / 2)
femm.mi_setgroup(group)
femm.mi_selectsegment(c3_x, c3_y)
femm.mi_setgroup(group)
femm.mi_selectsegment(c3_x - width / 2, c3_y)
femm.mi_setgroup(group)
def draw_FEMM(
self,
nodeprop=None,
propname=None,
elementsize=None,
automesh=None,
hide=False,
group=None,
):
"""< Draw the segment in FEMM and assign the property
Parameters
----------
nodeprop :
Nodal property
(Default value = None)
propname :
Boundary property ’propname’
(Default value = None)
elementsize :
Local element size along segment no greater than elementsize
(Default value = None)
automesh :
0 = mesher defers to the element constraint defined by
elementsize, 1 = mesher automatically chooses mesh size along
the selected segments
(Default value = None)
hide :
0 = not hidden in post-processor, 1 == hidden in post processorc
(Default value = False)
group :
group the segment belongs
(Default value = None)
Returns
-------
"""
# Get BC (if any)
if self.label in boundary_prop:
propname = boundary_prop[self.label]
# Add the nodes
X1, Y1 = self.begin.real, self.begin.imag
X2, Y2 = self.end.real, self.end.imag
femm.mi_addnode(X1, Y1)
femm.mi_selectnode(X1, Y1)
femm.mi_setnodeprop(nodeprop, group)
femm.mi_clearselected()
femm.mi_addnode(X2, Y2)
femm.mi_selectnode(X2, Y2)
femm.mi_setnodeprop(nodeprop, group)
femm.mi_clearselected()
# add the segment
femm.mi_addsegment(X1, Y1, X2, Y2)
# Set property
femm.mi_selectsegment((X1 + X2) / 2, (Y1 + Y2) / 2)
femm.mi_setsegmentprop(propname, elementsize, automesh, hide, group)
femm.mi_clearselected()
def draw(self):
R1 = self.OR - (self.dm + self.dri) #inner radius of rotor
R2 = self.OR - self.dm #radius to inside of PM
R3 = self.OR - self.dmp #radius to outside of steel rotor
self.hollow = R1 > self.threshold
num_magnets = 2 * self.p
theta = 360 / num_magnets #span between magnet centers in deg
c = np.cos(self.alpha_m / 2)
s = np.sin(self.alpha_m / 2)
#bottom 3 points
p1 = [R2 * c, -R2 * s]
p2 = [R3 * c, -R3 * s]
p3 = [self.OR * c, -self.OR * s]
#top 3 points
p4 = [self.OR * c, self.OR * s]
p5 = [R3 * c, R3 * s]
p6 = [R2 * c, R2 * s]
nominal_coords = [p1, p2, p3, p4, p5, p6]
#draw each of the magnets
for i in range(num_magnets):
angle = i * theta
rotated_coords = [
rotate(*coord, angle) for coord in nominal_coords
]
for coord in rotated_coords:
fe.mi_addnode(*coord)
c1, c2, c3, c4, c5, c6 = rotated_coords
#add segments in clockwise fashion
fe.mi_addsegment(*c1, *c2)
fe.mi_addsegment(*c2, *c3)
fe.mi_addarc(*c3, *c4, self.alpha_m_deg, 1)
fe.mi_addsegment(*c4, *c5)
fe.mi_addsegment(*c5, *c6)
fe.mi_addarc(*c1, *c6, self.alpha_m_deg, 1)
#connect between magnets
alpha_between = 360 / num_magnets - self.alpha_m_deg
for i in range(num_magnets):
start = rotate(*p5, theta * i)
stop = rotate(*p2, theta * (i + 1))
fe.mi_addarc(*start, *stop, alpha_between, 1)
if self.hollow:
fe.mi_addnode(0, R1)
fe.mi_addnode(0, -R1)
fe.mi_addarc(0, R1, 0, -R1, 180, 1)
fe.mi_addarc(0, -R1, 0, R1, 180, 1)
self.is_drawn = True
def creation_geometrie(self):
"""Méthode permettant de générer la géométrie"""
# Dessin d'un rectangle (xmin,ymin,xmax,ymax)
femm.mi_drawrectangle(-self.largeur / 2, -self.hauteur / 2,
self.largeur / 2, self.hauteur / 2)
# Dessin de points (x,y)
femm.mi_addnode(self.l_dent / 2, self.entrefer / 2)
femm.mi_addnode(-self.l_dent / 2, self.entrefer / 2)
femm.mi_addnode(self.l_dent / 2, -self.entrefer / 2)
femm.mi_addnode(-self.l_dent / 2, -self.entrefer / 2)
femm.mi_addnode(self.l_dent / 2, self.hauteur / 2 - self.l_dent / 2)
femm.mi_addnode(-self.l_dent / 2, self.hauteur / 2 - self.l_dent / 2)
femm.mi_addnode(self.l_dent / 2, -self.hauteur / 2 + self.l_dent / 2)
femm.mi_addnode(-self.l_dent / 2, -self.hauteur / 2 + self.l_dent / 2)
femm.mi_addnode(self.largeur / 2 - self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2)
femm.mi_addnode(-self.largeur / 2 + self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2)
femm.mi_addnode(self.largeur / 2 - self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
femm.mi_addnode(-self.largeur / 2 + self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
# Dessin des lignes (x1,y1,x2,y2)
femm.mi_addsegment(self.l_dent / 2, self.entrefer / 2,
-self.l_dent / 2, self.entrefer / 2)
femm.mi_addsegment(self.l_dent / 2, -self.entrefer / 2,
-self.l_dent / 2, -self.entrefer / 2)
femm.mi_addsegment(self.l_dent / 2, self.entrefer / 2, self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2)
femm.mi_addsegment(-self.l_dent / 2, self.entrefer / 2,
-self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2)
femm.mi_addsegment(self.l_dent / 2, -self.entrefer / 2,
self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
femm.mi_addsegment(-self.l_dent / 2, -self.entrefer / 2,
-self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
femm.mi_addsegment(self.l_dent / 2, self.hauteur / 2 - self.l_dent / 2,
self.largeur / 2 - self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2)
femm.mi_addsegment(-self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2,
-self.largeur / 2 + self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2)
femm.mi_addsegment(self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2,
self.largeur / 2 - self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
femm.mi_addsegment(-self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2,
-self.largeur / 2 + self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
femm.mi_addsegment(self.largeur / 2 - self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2,
self.largeur / 2 - self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
femm.mi_addsegment(-self.largeur / 2 + self.l_dent / 2,
self.hauteur / 2 - self.l_dent / 2,
-self.largeur / 2 + self.l_dent / 2,
-self.hauteur / 2 + self.l_dent / 2)
femm.mi_addsegment(self.l_dent / 2, self.entrefer / 2, self.l_dent / 2,
-self.entrefer / 2)
femm.mi_addsegment(-self.l_dent / 2, self.entrefer / 2,
-self.l_dent / 2, -self.entrefer / 2)