def calculate():
if flask.request.values.get('download', type=bool, default=False):
return footprint()
try:
args = parse_spiral_request()
except Exception as e:
return dict(success=False, error=str(e))
args['width'] -= args['trace_width']
args['height'] -= args['trace_width']
coil = ((x, y, 0) for x,y in squarespiral(args['width']/2, args['height']/2,
args['pitch'], args['turns']))
try:
impedance = coil_impedance(coil, args['trace_width'],
args['trace_height'],
args['frequency'],
'./fasthenry')
except TimeoutExpired:
return dict(success=False, error='Calculations took too long')
angfreq = 2 * math.pi * args['frequency']
resistance = format_si_prefix(impedance.real) + 'Ω'
inductance = format_si_prefix(impedance.imag / angfreq) + 'H'
qfactor = '{:.2g}'.format(impedance.imag / impedance.real)
capacitance = format_si_prefix(1 / (angfreq * impedance.imag)) + 'F'
args.update(resistance=resistance, inductance=inductance, qfactor=qfactor,
capacitance=capacitance)
return dict(success=True, resistance=resistance, inductance=inductance,
qfactor=qfactor, capacitance=capacitance,
download=flask.url_for('footprint', **args))
if args.thickness is not None:
trace_height = args.thickness * args.scale
else:
# 1 oz/ft² copper is 1.5 mils thick = .03406 mm
trace_height = args.weight * .03406
if args.shape == 'square':
coil = spiral.squarespiral(side1, side2, pitch, args.turns)
else:
coil = spiral.ellipticalspiral(side1, side2, pitch, args.turns,
args.vertices_per_turn)
coil = list((x * args.mirror, y) for x,y in coil)
if args.fasthenry:
angfreq = 2 * math.pi * args.frequency
Z = coil_impedance(((x,y,ii*zpitch/4) for ii, (x,y) in enumerate(coil)),
trace_width, trace_height, args.frequency)
L = Z.imag / angfreq
C = 1 / (angfreq * Z.imag)
Q = Z.imag / Z.real
print('Analysis of {}m x {}m {}-turn {}m pitch {}m trace inductor at {}Hz\n'.format(
si_prefix_format(side1*2e-3), si_prefix_format(side2*2e-3), args.turns,
si_prefix_format(pitch*1e-3), si_prefix_format(trace_width*1e-3),
si_prefix_format(args.frequency)))
print(' Inductance: {}H'.format(si_prefix_format(L)))
print('Resonant capacitance: {}F'.format(si_prefix_format(C)))
print(' Q: {:.1e}'.format(Q))
if args.kicad_mod is not None:
text_effects = SExpression('font', [
SExpression('size', [1, 1]),
SExpression('thickness', .15)])
trace_height = args.thickness * args.scale
else:
# 1 oz/ft² copper is 1.5 mils thick = .03406 mm
trace_height = args.weight * .03406
if args.shape == 'square':
coil = spiral.squarespiral(side1, side2, pitch, args.turns)
else:
coil = spiral.ellipticalspiral(side1, side2, pitch, args.turns,
args.vertices_per_turn)
coil = list((x * args.mirror, y) for x, y in coil)
if args.fasthenry:
angfreq = 2 * math.pi * args.frequency
Z = coil_impedance(
((x, y, ii * zpitch / 4) for ii, (x, y) in enumerate(coil)),
trace_width, trace_height, args.frequency)
L = Z.imag / angfreq
C = 1 / (angfreq * Z.imag)
Q = Z.imag / Z.real
print(
'Analysis of {}m x {}m {}-turn {}m pitch {}m trace inductor at {}Hz\n'.
format(si_prefix_format(side1 * 2e-3), si_prefix_format(side2 * 2e-3),
args.turns, si_prefix_format(pitch * 1e-3),
si_prefix_format(trace_width * 1e-3),
si_prefix_format(args.frequency)))
print(' Inductance: {}H'.format(si_prefix_format(L)))
print('Resonant capacitance: {}F'.format(si_prefix_format(C)))
print(' Q: {:.1e}'.format(Q))
if args.kicad_mod is not None:
