def simulate(self):
nTurns = float(self.nTurnsLineEdit.text())
innerRadius = float(self.innerRadiusLineEdit.text())
pitch = float(self.pitchLineEdit.text())
spacing = float(self.spacingLineEdit.text())
traceWidth = float(self.traceWidthLineEdit.text())
cuThickness = float(self.cuThicknessLineEdit.text())
pcbThickness = float(self.pcbThicknessLineEdit.text())
nLayers = int(self.nLayersLineEdit.text())
freq = float(self.freqLineEdit.text())
d = float(self.drawTolLineEdit.text())
# compute smaller filament size (see fasthenry docs)
nw = 2 # fasthenry default
nh = 2 # fasthenry default
nwinc = 1 # needs to be odd
while True:
n = (nwinc - 1) / 2 # rounding down
nfils = (2.0 - nw**n * (1.0 + nw)) / (1 - nw)
fw = 1e-3 * traceWidth / nfils # smaller width filament size
if (fw < self.delta):
break
nwinc = nwinc + 2
nhinc = 1 # needs to be odd
while True:
n = (nhinc - 1) / 2 # rounding down
nfils = (2.0 - nh**n * (1.0 + nh)) / (1 - nh)
fh = 1e-6 * cuThickness / nfils # smaller height filament
if (fh < self.delta):
break
nhinc = nhinc + 2
# print 'nwinc =', nwinc
# print 'nhinc =', nhinc
sf = dos.fh_file('test.inp')
sf.write_header(nwinc, nhinc)
#draw_arcs_spiral(N_turns, r_in, pitch, tr_w, N, dir)
dir = 1
inductorStyleIndex = self.indStyleCB.currentIndex()
if (inductorStyleIndex == InductorStyle.SQUARE):
vx = dos.square_spiral(nTurns, innerRadius, pitch)
else:
vx = dos.circ_spiral(nTurns, innerRadius, pitch, dir, d)
sf.add_circ_spiral(vx, 1, traceWidth, cuThickness * 1e-3, pcbThickness)
sf.add_ports()
if (nLayers == 2):
vx = dos.circ_spiral(nTurns, innerRadius, pitch, -dir, d)
sf.add_circ_spiral(
vx,
2,
traceWidth,
cuThickness * 1e-3,
pcbThickness)
sf.add_ports()
sf.add_frequency(freq * 1e6)
sf.close()
sf.run()
freqs, mats = sf.readZc()
if (nLayers == 1):
Xs = mats[0][0][0].imag
Rs = mats[0][0][0].real
else:
Zs1 = mats[0][0][0]
Zs2 = mats[0][1][1]
M1 = mats[0][0][1]
M2 = mats[0][1][0]
# inductors in series, aiding; minus sign due to coils ports order
Zs = Zs1 + Zs2 - (M1 + M2)
Xs = Zs.imag
Rs = Zs.real
Ls = 1e6 * Xs / (2.0 * math.pi * freqs[0]) # uH
Q = Xs / Rs
self.simIndLineEdit.setText("%.3e" % Ls)
self.simResLineEdit.setText("%.3e" % Rs)
self.simQLineEdit.setText("%.1e" % Q)
return Ls
def writeModule(self):
fname, ok = QFileDialog.getSaveFileName(self, 'Save Module', '.', 'Footprint (*.kicad_mod);;Any File (*)')
if (not fname):
return
if (not fname.endswith('.kicad_mod')):
fname = fname + '.kicad_mod'
nTurns = float(self.nTurnsLineEdit.text())
innerRadius = float(self.innerRadiusLineEdit.text())
pitch = float(self.pitchLineEdit.text())
spacing = float(self.spacingLineEdit.text())
traceWidth = float(self.traceWidthLineEdit.text())
nLayers = int(self.nLayersLineEdit.text())
d = float(self.drawTolLineEdit.text())
polygonVertexCount = None
geometricPrimitives = None
dir = 1
inductorStyleIndex = self.indStyleCB.currentIndex()
if (inductorStyleIndex == InductorStyle.CIRCULAR_SEGMENTS): # circular segments
geometricPrimitives = dos.circ_spiral(nTurns, innerRadius, pitch, dir, d)
elif (inductorStyleIndex == InductorStyle.CIRCULAR_ARCS): # circular arcs
polygonVertexCount = int(self.polygonVertexCountLineEdit.text())
geometricPrimitives = dos.arcs_spiral(nTurns, innerRadius, pitch, dir, polygonVertexCount)
elif (inductorStyleIndex == InductorStyle.SQUARE): # rectangle
geometricPrimitives = dos.square_spiral(nTurns, innerRadius, pitch)
# Check if making an inductor from the given parameters is at all possible
if (geometricPrimitives is None):
self.showInvalidParametersErrorMsg()
else:
sm = dos.kmodule(fname)
sm.write_header(name='SIND', descr='spiral inductor', tags='SMD')
if (inductorStyleIndex == InductorStyle.CIRCULAR_SEGMENTS): # circular segments
vx = geometricPrimitives
sm.add_circ_spiral(vx, 'F.Cu', traceWidth)
if (nLayers == 2):
pad1 = vx[-1] # inductor starts at end of top spiral
vx = dos.circ_spiral(nTurns, innerRadius, pitch, -dir, d)
sm.add_circ_spiral(vx, 'B.Cu', traceWidth)
sm.add_thru_pad('lc', 'circle', vx[0], dos.Point(0.6, 0.6), 0.3)
end_layer = 'B'
else: # single-layer spiral
pad1 = vx[0] # inductor starts at center of spiral
end_layer = 'F'
pad2 = vx[-1] # inductor ends always at end of last spiral
elif (inductorStyleIndex == InductorStyle.CIRCULAR_ARCS): # circular arcs
arcs = geometricPrimitives
sm.add_arc_spiral(arcs, 'F.Cu', traceWidth)
if (nLayers == 2):
# inductor starts at end of top spiral
p_end = arcs[-1][1].copy() # starting point of the last arc
p_center = arcs[-1][0] # centre of the last arc
theta = arcs[-1][2] # arc starting point
p_end.rotate_about(p_center, theta) # end point of the circular arc
pad1 = p_end
arcs = dos.arcs_spiral(nTurns, innerRadius, pitch, -dir, polygonVertexCount)
sm.add_arc_spiral(arcs, 'B.Cu', traceWidth)
sm.add_thru_pad('lc', 'circle', arcs[0][1], dos.Point(0.6, 0.6), 0.3)
end_layer = 'B'
else: # single-layer spiral
# inductor starts at center of spiral
pad1 = arcs[0][1] # starting point of the last arc
end_layer = 'F'
# inductor ends always at end of last spiral
p_end = arcs[-1][1].copy() # starting point of the last arc
p_center = arcs[-1][0] # centre of the last arc
theta = arcs[-1][2] # arc starting point
p_end.rotate_about(p_center, theta) # end point of the circular arc
pad2 = p_end
elif (inductorStyleIndex == InductorStyle.SQUARE): # rectangle
vx = geometricPrimitives
sm.add_circ_spiral(vx, 'F.Cu', traceWidth)
# single-layer spiral
pad1 = vx[0] # inductor starts at center of spiral
end_layer = 'F'
pad2 = vx[-1] # inductor ends always at end of last spiral
else:
pass
# add SMD pads at the beginning and end
padSize = dos.Point(traceWidth/2.0, traceWidth/2.0)
sm.add_smd_pad('1', 'rect', pad1, padSize, 'F')
sm.add_smd_pad('2', 'rect', pad2, padSize, end_layer)
#draw_arcs_spiral(nTurns, innerRadius, pitch, traceWidth, N, dir)
sm.write_refs(0, 0, ref='REF**', value='LLL')
sm.close()
def writeModule(self):
fname = QtGui.QFileDialog.getSaveFileName(self, 'Save Module', '.', 'Footprint (*.kicad_mod);;Any File (*)')
if (not fname):
return
if (not fname.endsWith('.kicad_mod')):
fname = fname + '.kicad_mod'
nTurns = float(self.nTurnsLineEdit.text())
innerRadius = float(self.innerRadiusLineEdit.text())
pitch = float(self.pitchLineEdit.text())
spacing = float(self.spacingLineEdit.text())
traceWidth = float(self.traceWidthLineEdit.text())
nLayers = int(self.nLayersLineEdit.text())
d = float(self.drawTolLineEdit.text())
sm = dos.kmodule(fname)
sm.write_header(name='SIND', descr='spiral inductor', tags='SMD')
dir = 1
if (self.indStyleCB.currentIndex() == 0): # circular segments
vx = dos.circ_spiral(nTurns, innerRadius, pitch, dir, d)
sm.add_circ_spiral(vx, 'F.Cu', traceWidth)
if (nLayers == 2):
pad1 = vx[-1] # inductor starts at end of top spiral
vx = dos.circ_spiral(nTurns, innerRadius, pitch, -dir, d)
sm.add_circ_spiral(vx, 'B.Cu', traceWidth)
sm.add_thru_pad('lc', 'circle', vx[0], dos.Point(0.6, 0.6), 0.3)
end_layer = 'B'
else: # single-layer spiral
pad1 = vx[0] # inductor starts at center of spiral
end_layer = 'F'
pad2 = vx[-1] # inductor ends always at end of last spiral
else: # circular arcs
# FIXME: make N below user-configurable instead of 4
arcs = dos.arcs_spiral(nTurns, innerRadius, pitch, dir, 4)
sm.add_arc_spiral(arcs, 'F.Cu', traceWidth)
if (nLayers == 2):
# inductor starts at end of top spiral
p_end = arcs[-1][1].copy() # starting point of the last arc
p_center = arcs[-1][0] # centre of the last arc
theta = arcs[-1][2] # arc starting point
p_end.rotate_about(p_center, theta) # end point of the circular arc
pad1 = p_end
arcs = dos.arcs_spiral(nTurns, innerRadius, pitch, -dir, 4)
sm.add_arc_spiral(arcs, 'B.Cu', traceWidth)
sm.add_thru_pad('lc', 'circle', arcs[0][1], dos.Point(0.6, 0.6), 0.3)
end_layer = 'B'
else: # single-layer spiral
# inductor starts at center of spiral
pad1 = arcs[0][1] # starting point of the last arc
end_layer = 'F'
# inductor ends always at end of last spiral
p_end = arcs[-1][1].copy() # starting point of the last arc
p_center = arcs[-1][0] # centre of the last arc
theta = arcs[-1][2] # arc starting point
p_end.rotate_about(p_center, theta) # end point of the circular arc
pad2 = p_end
# add SMD pads at the beginning and end
padSize = dos.Point(traceWidth/2.0, traceWidth/2.0)
sm.add_smd_pad('1', 'rect', pad1, padSize, 'F')
sm.add_smd_pad('2', 'rect', pad2, padSize, end_layer)
#draw_arcs_spiral(nTurns, innerRadius, pitch, traceWidth, N, dir)
sm.write_refs(0, 0, ref='REF**', value='LLL')
sm.close()