Instructions | Inductance design tools

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Github instructions

Instructions for using the programs are available on GitHub.

Use CoilCalc to characterize an existing coil

#
# Example coil: Diameter 50mm, Length 200mm, with 35 turns
#
> CoilCalc --D=50 --l=200 --N=35 --d=1.44 --f=13.562

# QOIL™ — https://hamwaves.com/qoil/ — v20181217
#   Coil design 2023-03-11 12:20
# INPUT
#   mean diameter of the coil    D = 50.0 mm
#   number of turns              N = 35.0
#   length of the coil           ℓ = 200.0 mm
#   wire or tubing diameter      d = 1.44 mm
#   design frequency             f = 13.562 MHz
#   The (plating) material is annealed copper.
# INTERMEDIATE RESULTS
#   winding pitch                p = 5.71 mm
#   physical conductor length    ℓ_w_phys = 5501.4 mm
#   effective pitch angle        ψ = 2.09°
# RESULTS
#   Effective equivalent circuit
#     effective series inductance @ design frequency          L_eff_s = 16.652 μH
#     effective series reactance @ design frequency           X_eff_s = 1419.0 Ω
#     effective series AC resistance @ design frequency       R_eff_s = 1.438 Ω
#     effective unloaded quality factor @ design frequency    Q_eff   = 986
#   Lumped circuit equivalent
#     f-independent series inductance; geometrical formula    L_s     = 14.105 μH
#     series AC resistance @ design frequency                 R_s     = 1.032 Ω
#     parallel stray capacitance @ design frequency           C_p     = 1.5 pF
#   Self-resonant frequency                                   f_res   = 26.342 MHz
# DONATE
#   If this calculator proved any useful to you,
#   please, consider making a one-off donation
#   towards keeping me and the server up and running.
#   Thank you!

Use CoilScanL with an existing coil form

#
# Make a 12uH coil using an existing 48mm form
#
> CoilScanL --LTarget=12 --DForm=48 --lMin=20 --lMax=250 --lInc=10 --d=1.44 --f=13.562

# CoilScan 2023-03-11 13:21
#
# LTarget = 12, d = 1.44, p = 6, f = 13.562
#
# DForm =  48, lMin  =  20, lMax = 250, lInc =  10
#
# D(mm),   l(mm), Q(plot),      Q,       N,    L(uH), wLen(m), Res(MHz), pitch(mm), Err, Cmd
  49.44,   30.00,     621,     621   16.77,    12.00,     2.61,    34.32,      1.79,   0, "CoilCalc --D=49.440 --l=30.000 --N=16.770 --d=1.440 --f=13.562"
  49.44,   40.00,     843,     843   17.89,    12.00,     2.78,    34.44,      2.24,   0, "CoilCalc --D=49.440 --l=40.000 --N=17.890 --d=1.440 --f=13.562"
  49.44,   50.00,     947,     947   18.98,    12.00,     2.95,    34.40,      2.63,   0, "CoilCalc --D=49.440 --l=50.000 --N=18.980 --d=1.440 --f=13.562"
  49.44,   60.00,     981,     981   20.03,    12.00,     3.11,    34.26,      2.99,   0, "CoilCalc --D=49.440 --l=60.000 --N=20.030 --d=1.440 --f=13.562"
  49.44,   70.00,     986,     986   21.03,    12.00,     3.27,    34.05,      3.33,   0, "CoilCalc --D=49.440 --l=70.000 --N=21.030 --d=1.440 --f=13.562"
  49.44,   80.00,     995,     995   21.98,    12.00,     3.41,    33.79,      3.64,   0, "CoilCalc --D=49.440 --l=80.000 --N=21.980 --d=1.440 --f=13.562"
  49.44,   90.00,     983,     983   22.87,    12.00,     3.55,    33.52,      3.93,   0, "CoilCalc --D=49.440 --l=90.000 --N=22.870 --d=1.440 --f=13.562"
  49.44,  100.00,     974,     974   23.72,    12.00,     3.69,    33.23,      4.22,   0, "CoilCalc --D=49.440 --l=100.000 --N=23.720 --d=1.440 --f=13.562"
  49.44,  110.00,     972,     972   24.53,    12.00,     3.81,    32.94,      4.48,   0, "CoilCalc --D=49.440 --l=110.000 --N=24.530 --d=1.440 --f=13.562"
  49.44,  120.00,     972,     972   25.31,    12.00,     3.93,    32.65,      4.74,   0, "CoilCalc --D=49.440 --l=120.000 --N=25.310 --d=1.440 --f=13.562"
  49.44,  130.00,     957,     957   26.05,    12.00,     4.05,    32.37,      4.99,   0, "CoilCalc --D=49.440 --l=130.000 --N=26.050 --d=1.440 --f=13.562"
  49.44,  140.00,     939,     939   26.76,    12.00,     4.16,    32.09,      5.23,   0, "CoilCalc --D=49.440 --l=140.000 --N=26.760 --d=1.440 --f=13.562"
  49.44,  150.00,     923,     923   27.45,    12.00,     4.27,    31.82,      5.46,   0, "CoilCalc --D=49.440 --l=150.000 --N=27.450 --d=1.440 --f=13.562"
  49.44,  160.00,     909,     909   28.11,    12.00,     4.37,    31.56,      5.69,   0, "CoilCalc --D=49.440 --l=160.000 --N=28.110 --d=1.440 --f=13.562"
  49.44,  170.00,     897,     897   28.74,    12.00,     4.47,    31.30,      5.91,   0, "CoilCalc --D=49.440 --l=170.000 --N=28.740 --d=1.440 --f=13.562"
  49.44,  180.00,     886,     886   29.35,    12.00,     4.56,    31.06,      6.13,   0, "CoilCalc --D=49.440 --l=180.000 --N=29.350 --d=1.440 --f=13.562"
  49.44,  190.00,     876,     876   29.94,    12.00,     4.65,    30.82,      6.35,   0, "CoilCalc --D=49.440 --l=190.000 --N=29.940 --d=1.440 --f=13.562"

Use CoilScanDL to design a highly optimized coil

#
# Design a highly optimized coil, using a bespoke form
#
> CoilScanDL --LTarget=26 DMin=20 DMax=280 DInc=5 lMin=20 lMax=300 lInc=5 --d=1.291, --f=13.562

# CoilScan 2023-03-11 14:00
#
# LTarget = 26, d = 6.35, p = 6, f = 13.562
#
# DMin =  20, DMax = 280, DInc =   5
# lMin =  20, lMax = 300, lInc =   5
#
# D(mm),   l(mm), Q(plot),      Q,       N,    L(uH), wLen(ft), Res(MHz), pitch(mm), Err, Cmd
  60.00,  280.00,    1939,    1939   41.73,    26.00,    25.82,    20.13,      6.71,   0, "CoilCalc --D=60.000 --l=280.000 --N=41.730 --d=6.350 --f=13.562"
  60.00,  285.00,    1965,    1965   41.95,    26.00,    25.96,    20.08,      6.79,   0, "CoilCalc --D=60.000 --l=285.000 --N=41.950 --d=6.350 --f=13.562"
  60.00,  290.00,    1991,    1991   42.17,    26.00,    26.09,    20.04,      6.88,   0, "CoilCalc --D=60.000 --l=290.000 --N=42.170 --d=6.350 --f=13.562"
  60.00,  295.00,    2018,    2018   42.38,    26.00,    26.23,    19.99,      6.96,   0, "CoilCalc --D=60.000 --l=295.000 --N=42.380 --d=6.350 --f=13.562"
  60.00,  300.00,    2045,    2045   42.59,    26.00,    26.36,    19.95,      7.04,   0, "CoilCalc --D=60.000 --l=300.000 --N=42.590 --d=6.350 --f=13.562"
  60.00,  305.00,    2063,    2063   42.81,    26.00,    26.49,    19.91,      7.13,   0, "CoilCalc --D=60.000 --l=305.000 --N=42.810 --d=6.350 --f=13.562"
  65.00,  245.00,    1974,    1974   36.56,    26.00,    24.51,    20.16,      6.70,   0, "CoilCalc --D=65.000 --l=245.000 --N=36.560 --d=6.350 --f=13.562"
  65.00,  250.00,    2012,    2012   36.78,    26.00,    24.65,    20.11,      6.80,   0, "CoilCalc --D=65.000 --l=250.000 --N=36.780 --d=6.350 --f=13.562"
    :       :          :
^C

> CoilScanDL --LTarget=26 DMin=20 DMax=280 DInc=5 lMin=20 lMax=300 lInc=5 --d=1.291, --f=13.562 >Data.csv
> gnuplot DLPlot.gp

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