kopia lustrzana https://github.com/miguelvaca/vk3cpu
634 wiersze
34 KiB
HTML
634 wiersze
34 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>VK3CPU RF Inductor Calculator</title>
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<link rel="stylesheet" href="inductor.css">
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</head>
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<body>
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<header>Miguel <a href="mailto:vk3cpu@gmail.com">VK3CPU</a> - RF Inductor Calculator<br><a href="inductor.html">[Wire Metric]</a> <a href="inductor_swg.html">[Wire SWG]</a> <a href="inductor_lrg.html">[Coax Metric]</a></header>
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<section class="gridLayoutClass">
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<div id="inductor-container" class="inductor-container" style="position: relative;">
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<canvas id="inductor2D" class="inductorClass" width="350" height="350">
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</canvas>
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</div>
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<div class="slider_container">
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<div class="sliders">
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<label for="conductor_diameter_slider">⌀a:</label>
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<input type="range" id="conductor_diameter_slider" min="0" max="40" value="20" step="1">
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</div>
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<div class="sliders">
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<label for="loop_diameter_slider">⌀b:</label>
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<input type="range" id="loop_diameter_slider" min="0.16" max="4.0" value="1.00" step="0.02">
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</div>
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<div class="sliders">
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<label for="loop_spacing_slider">c/a:</label>
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<input type="range" id="loop_spacing_slider" min="1.1" max="4.0" value="1.1" step="0.01">
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</div>
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<div class="sliders">
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<label for="loop_turns_slider">N:</label>
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<input type="range" id="loop_turns_slider" min="2" max="150" value="8.0" step="1.0">
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</div>
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<div class="sliders">
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<label for="frequency_slider">f:</label>
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<input type="range" id="frequency_slider" min="1.0" max="54.0" value="7.0" step="0.05">
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</div>
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</div>
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<div id="notes" class="notes">
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<br>
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<b><u>Notes:</u></b><br>
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RF Inductor Calculator was developed to help users predict the RF characteristics of a single-layer solenoid-style air-core inductor. <br><br>
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<u>Inputs via the slider widgets:</u>
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<ul>
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<li>⌀a : Conductor diameter slider changes AWG from 0-40. Actual diameter displayed in decimal inches.</li>
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<li>⌀b : Coil diameter in decimal inches.</li>
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<li>c/a : 'c' is the winding-to-winding distance, measured from the conductor mid-points. The 'a' is the conductor diameter, so 'c/a' is the spacing ratio. (c/a >= 1.1)
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A low-value will increase the resistance due to the proximity effect.</li>
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<li>N : Number of turns or windings.</li>
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<li>f : The frequency of interest (MHz) for some of the calculations. Frequency dependent results are shown on the top-right.</li>
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</ul>
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<p>Characteristics on the left are independent of frequency, while the characteristics on the right are dependent on the selected frequency. <br><br>
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Each of the graphic representations attempt to keep the relative geometry correct, without exceeding the drawing boundary. The coil diameter
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relative to the conductor diameter are representative. </p>
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<u>Calculated dimensions:</u>
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<ul>
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<li>⌀o : Outer coil diameter (inches) </li>
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<li>⌀i : Inner coil diameter (inches) - corresponds to the diameter of the winding former.</li>
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<li>c : Distance between windings, measured from the conductor centers (inches).</li>
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<li>ℓ : Length of the coil (inches). Equal to c x N.</li>
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</ul>
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<u>Calculated parameters:</u>
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<ul> <b>Frequency independent:[L]</b>
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<li>L : Inductance is calculated using Nagaoka's equation incorporating his coefficient.</li>
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<li>C : Capacitance is calculated using Knight's 2016 paper on self-resonance and self-capacitance of solenoid coils.</li>
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<li>Rdc : DC resistance is calculated using conductor length divided by the conductor cross-sectional area, assuming a copper conductor.</li>
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<li>SRF : Self-resonant frequency (MHz) for the unloaded coil. </li>
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<li>wire : Length of wire required to wind the inductor. </li>
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</ul>
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<ul> <b>Frequency dependent:[R]</b> (Text goes <font color="red">RED</font> when selected frequency > SRF. Inductor model is not accurate once SRF is exceeded.)
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<li>f : Selected frequency in MHz</li>
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<li>δ : Skin depth due to skin effect (μm)</li>
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<li>Rac : AC resistance is calculated using the skin effect and proximity resistance from empirical data collected by Medhurst using the spacing ratio, and length-to-diameter ratio.</li>
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<li>Xₗ : Inductive reactance at the given frequency. (Ω) - pure inductive component, ignoring parasitic capacitance </li>
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<li>Z : Complex impedance at the given frequency. (Ω) - includes losses due to series Rac and parallel parasitic C</li>
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<li>|Z| : Impedance magnitude at the given frequency. (Ω)</li>
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<li>Q : Effective Quality Factor of the inductor at the given frequency. - (|Z.im|/Z.re)</li>
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</ul>
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</div>
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<u><b>Other VK3CPU calculators:</b>
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<ul>
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<li><a href="https://miguelvaca.github.io/vk3cpu/magloop.html">Magloop - STL Antenna Calculator</a></li>
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<li><a href="https://miguelvaca.github.io/vk3cpu/short_dipole.html">Coil-loaded Dipole Calculator</a></li>
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<li><a href="https://miguelvaca.github.io/vk3cpu/toroid.html">RF Toroid Calculator</a></li>
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<li><a href="https://miguelvaca.github.io/vk3cpu/transformer.html">RF Transformer Calculator</a></li>
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</ul>
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</u><br>
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</section>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjs/7.5.1/math.min.js"></script>
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<script src="inductor.js"></script>
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<script>
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function awgToMm(awg) {
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//
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switch (awg) {
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case 40: return 0.0799;
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case 39: return 0.0897;
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case 38: return 0.101;
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case 37: return 0.113;
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case 36: return 0.127;
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case 35: return 0.143;
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case 34: return 0.160;
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case 33: return 0.180;
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case 32: return 0.202;
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case 31: return 0.227;
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case 30: return 0.255;
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case 29: return 0.286;
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case 28: return 0.321;
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case 27: return 0.361;
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case 26: return 0.405;
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case 25: return 0.455;
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case 24: return 0.511;
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case 23: return 0.573;
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case 22: return 0.644;
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case 21: return 0.723;
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case 20: return 0.812;
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case 19: return 0.912;
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case 18: return 1.024;
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case 17: return 1.150;
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case 16: return 1.291;
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case 15: return 1.450;
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case 14: return 1.628;
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case 13: return 1.828;
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case 12: return 2.053;
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case 11: return 2.305;
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case 10: return 2.588;
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case 9: return 2.906;
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case 8: return 3.264;
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case 7: return 3.665;
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case 6: return 4.115;
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case 5: return 4.621;
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case 4: return 5.189;
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case 3: return 5.827;
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case 2: return 6.544;
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case 1: return 7.348;
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case 0: return 8.251;
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default: return 0.0;
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}
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}
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// Define global storage for calculated values, so we don't recalculate the same things multiple times:
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var inductor = {
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loop_diameter_meters : 0.0,
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cond_diameter_meters : 0.0,
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spacing_ratio : 0.0,
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loop_turns : 0.0,
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frequency_hz : 0.0,
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L : 0.0,
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C : 0.0,
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Rdc : 0.0,
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SRF : 0.0,
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Xl : 0.0,
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Xc : 0.0,
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Z : 0.0,
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skin_depth : 0.0,
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Rac : 0.0,
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Q : 0.0
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};
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// Solve all the parameters, and re-draw the canvas:
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function recalculate() {
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// Input variables:
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inductor.loop_diameter_meters = 0.001 * loop_diameter_slider.value * 25.4; // Inches to mm then to m
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inductor.cond_diameter_meters = 0.001 * awgToMm(40.0 - conductor_diameter_slider.value);
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inductor.spacing_ratio = 1.0 * loop_spacing_slider.value;
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inductor.loop_turns = 1.0 * loop_turns_slider.value;
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inductor.frequency_hz = 1e6 * frequency_slider.value;
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// Frequency independent characteristics:
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inductor.L = getInductance(inductor.loop_diameter_meters, inductor.cond_diameter_meters, inductor.spacing_ratio, inductor.loop_turns);
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inductor.C = multiloopCapacitance(inductor.loop_diameter_meters, inductor.cond_diameter_meters, inductor.spacing_ratio, inductor.loop_turns);
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inductor.Rdc = dcResistance(inductor.loop_diameter_meters, inductor.cond_diameter_meters, inductor.spacing_ratio, inductor.loop_turns);
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inductor.SRF = selfResonantFrequency(inductor.L, inductor.C);
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// Frequency dependent characteristics:
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inductor.Xl = inductiveReactance(inductor.frequency_hz, inductor.L);
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inductor.Xc = capacitiveReactance(inductor.frequency_hz, inductor.C);
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inductor.skin_depth = skinDepth(inductor.frequency_hz);
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inductor.Rac = acResistance(inductor.loop_diameter_meters, inductor.cond_diameter_meters, inductor.spacing_ratio, inductor.loop_turns, inductor.frequency_hz);
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//inductor.Q = qualityFactor(inductor.Xl, inductor.Rac);
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// Calculate impedance:
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var Zl = math.complex(inductor.Rac, inductor.Xl);
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var Zc = math.complex(0, inductor.Xc);
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inductor.Z = math.divide(math.multiply(Zl, Zc), math.add(Zl, Zc));
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inductor.Q = Math.abs(inductor.Z.im) / inductor.Z.re;
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// Redraw the canvas:
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//drawDesign();
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}
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// Specify fonts for changing parameters controlled by the sliders:
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var normal_font = "12px arial";
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var emphasis_font = "bold 14px arial";
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const emphasis_delay = 1200;
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var loop_dia_timer_handler = 0;
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var loop_dia_font = normal_font;
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loop_diameter_slider.oninput = function() {
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recalculate();
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if(loop_dia_timer_handler == 0) {
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loop_dia_font = emphasis_font;
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loop_dia_timer_handler = setTimeout(function(){
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loop_dia_font = normal_font;
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drawDesign();
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loop_dia_timer_handler = 0;
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}, emphasis_delay);
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} else {
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clearTimeout(loop_dia_timer_handler);
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loop_dia_timer_handler = setTimeout(function(){
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loop_dia_font = normal_font;
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drawDesign();
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loop_dia_timer_handler = 0;
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}, emphasis_delay);
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}
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drawDesign();
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}
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var cond_dia_timer_handler = 0;
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var cond_dia_font = normal_font;
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conductor_diameter_slider.oninput = function() {
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recalculate();
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if(cond_dia_timer_handler == 0) {
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cond_dia_font = emphasis_font;
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cond_dia_timer_handler = setTimeout(function(){
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cond_dia_font = normal_font;
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drawDesign();
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cond_dia_timer_handler = 0;
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}, emphasis_delay);
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} else {
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clearTimeout(cond_dia_timer_handler);
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cond_dia_timer_handler = setTimeout(function(){
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cond_dia_font = normal_font;
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drawDesign();
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cond_dia_timer_handler = 0;
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}, emphasis_delay);
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}
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drawDesign();
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}
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var turns_timer_handler = 0;
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var turns_font = normal_font;
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loop_turns_slider.oninput = function() {
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recalculate();
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if(turns_timer_handler == 0) {
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turns_font = emphasis_font;
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turns_timer_handler = setTimeout(function(){
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turns_font = normal_font;
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drawDesign();
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turns_timer_handler = 0;
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}, emphasis_delay);
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} else {
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clearTimeout(turns_timer_handler);
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turns_timer_handler = setTimeout(function(){
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turns_font = normal_font;
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drawDesign();
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turns_timer_handler = 0;
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}, emphasis_delay);
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}
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drawDesign();
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}
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var spacing_timer_handler = 0;
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var spacing_font = normal_font;
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loop_spacing_slider.oninput = function() {
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recalculate();
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if(spacing_timer_handler == 0) {
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spacing_font = emphasis_font;
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spacing_timer_handler = setTimeout(function(){
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spacing_font = normal_font;
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drawDesign();
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spacing_timer_handler = 0;
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}, emphasis_delay);
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} else {
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clearTimeout(spacing_timer_handler);
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spacing_timer_handler = setTimeout(function(){
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spacing_font = normal_font;
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drawDesign();
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spacing_timer_handler = 0;
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}, emphasis_delay);
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}
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drawDesign();
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}
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var frequency_timer_handler = 0;
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var frequency_font = normal_font;
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frequency_slider.oninput = function() {
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recalculate();
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if(frequency_timer_handler == 0) {
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frequency_font = emphasis_font;
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frequency_timer_handler = setTimeout(function(){
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frequency_font = normal_font;
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drawDesign();
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frequency_timer_handler = 0;
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}, emphasis_delay);
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} else {
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clearTimeout(frequency_timer_handler);
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frequency_timer_handler = setTimeout(function(){
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frequency_font = normal_font;
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drawDesign();
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frequency_timer_handler = 0;
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}, emphasis_delay);
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}
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drawDesign();
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}
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window.onresize = function() {
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recalculate();
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drawDesign();
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}
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window.onorientationchange = function() {
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recalculate();
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drawDesign();
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}
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window.onbeforeprint = function() {
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console.log("onbeforeprint");
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drawDesign();
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}
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function drawArrow(ctx, x, y, angle) {
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const l1 = 15.0;
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const l2 = 20.0;
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ctx.beginPath();
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ctx.moveTo(x , y);
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ctx.lineTo(x + l1*Math.cos(angle+0.33*Math.PI), y + l1*Math.sin(angle+0.33*Math.PI));
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ctx.lineTo(x + l1*Math.cos(angle+0.67*Math.PI), y + l1*Math.sin(angle+0.67*Math.PI));
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ctx.lineTo(x, y);
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ctx.lineTo(x + l2*Math.cos(angle+0.5*Math.PI), y + l2*Math.sin(angle+0.5*Math.PI));
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ctx.stroke();
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}
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const afront_canvas = document.getElementById("inductor2D");
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const fctx = afront_canvas.getContext('2d');
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function drawDesign() {
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const win_width = document.getElementById("inductor-container").clientWidth;
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const win_height = document.getElementById("inductor-container").clientHeight;
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afront_canvas.width = win_width-12;
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afront_canvas.height = win_height-12;
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fctx.clearRect(0, 0, win_width, win_height);
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const loop_radius = 0.11 * win_height;
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var cond_radius = loop_radius * (inductor.cond_diameter_meters / inductor.loop_diameter_meters);
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const loopx = win_width/2;
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const loopy = win_height/4;
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const loop_diameter_mm = inductor.loop_diameter_meters * 1000.0;
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const cond_diameter_mm = inductor.cond_diameter_meters * 1000.0;
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const loop_diameter_inches = loop_diameter_mm / 25.4;
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const cond_diameter_inches = cond_diameter_mm / 25.4;
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fctx.font = "bold 14px arial";
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fctx.textAlign = "center";
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fctx.fillText("Wire - AWG", win_width*0.5, 18);
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// Draw loop ends first, then draw the loop after:
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fctx.strokeStyle = "grey";
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fctx.beginPath();
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fctx.arc(loopx - 0.5*loop_radius, loopy + 1.414*loop_radius, 0.5 * loop_radius, 0.0, -0.40 * Math.PI, true);
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fctx.lineWidth = cond_radius * 2.0;
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fctx.stroke();
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fctx.strokeStyle = "black";
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fctx.beginPath();
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fctx.arc(loopx + 0.5*loop_radius, loopy + 1.414*loop_radius, 0.5 * loop_radius, Math.PI, -0.60 * Math.PI, false);
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fctx.lineWidth = cond_radius * 2.0;
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fctx.stroke();
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// Draw loop:
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fctx.beginPath();
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fctx.arc(loopx, loopy, loop_radius, 0.0, 2.0 * Math.PI, false);
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fctx.stroke();
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fctx.lineWidth = 1.0;
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// Draw loop diameter arrow:
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const y_offset = loopy + loop_radius + 20;
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var arrow_size = 10.0;
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/*
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fctx.beginPath();
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fctx.moveTo(loopx - loop_radius, loopy);
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fctx.lineTo(loopx - loop_radius, y_offset);
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fctx.lineTo(loopx - loop_radius - arrow_size, y_offset - arrow_size);
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fctx.lineTo(loopx - loop_radius - arrow_size, y_offset + arrow_size);
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fctx.lineTo(loopx - loop_radius, y_offset);
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fctx.lineTo(loopx - loop_radius - 3.0*arrow_size, y_offset);
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fctx.stroke();
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fctx.beginPath();
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fctx.moveTo(loopx + loop_radius, loopy);
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fctx.lineTo(loopx + loop_radius, y_offset);
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fctx.lineTo(loopx + loop_radius + arrow_size, y_offset - arrow_size);
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fctx.lineTo(loopx + loop_radius + arrow_size, y_offset + arrow_size);
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fctx.lineTo(loopx + loop_radius, y_offset);
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fctx.lineTo(loopx + loop_radius + 3.0*arrow_size, y_offset);
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fctx.stroke();
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*/
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// Write conductor diameter symbol:
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fctx.font = cond_dia_font;
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fctx.textAlign = "right";
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fctx.fillText("\u2300a = " + cond_diameter_inches.toFixed(4).toString() + "\"", loopx - loop_radius - 2.0*arrow_size, loopy - 6);
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fctx.fillText("(" + cond_diameter_mm.toFixed(3).toString() + "mm)", loopx - loop_radius - 2.0*arrow_size, loopy + 12);
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fctx.textAlign = "center";
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//fctx.font = "14px courier";
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fctx.fillText((40-conductor_diameter_slider.value).toString() + "AWG", loopx, loopy + 3);
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//fctx.font = "12px arial";
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fctx.textAlign = "right";
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fctx.font = loop_dia_font;
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// Write loop diameter symbol:
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fctx.fillText("\u2300b = " + loop_diameter_inches.toFixed(2).toString() + "\"", loopx - loop_radius - 2.0*arrow_size, y_offset - 4);
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fctx.fillText("(" + loop_diameter_mm.toFixed(2).toString() + "mm)", loopx - loop_radius - 2.0*arrow_size, y_offset + 12);
|
|
|
|
fctx.font = "12px arial";
|
|
fctx.fillText("(A=" + (cond_diameter_mm**2).toFixed(2).toString() + " mm\u00B2)", loopx - loop_radius - 2.0*arrow_size, loopy + 28);
|
|
|
|
// Draw inner-diameter arrows: (for using a winding former)
|
|
const inner_dia_y = loopy + loop_radius + 40;
|
|
fctx.beginPath();
|
|
fctx.moveTo(loopx - loop_radius + cond_radius, loopy);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius, inner_dia_y);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius - arrow_size, inner_dia_y - arrow_size);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius - arrow_size, inner_dia_y + arrow_size);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius, inner_dia_y);
|
|
fctx.lineTo(loopx - loop_radius - 3.0*arrow_size, inner_dia_y);
|
|
fctx.stroke();
|
|
|
|
fctx.beginPath();
|
|
fctx.moveTo(loopx + loop_radius - cond_radius, loopy);
|
|
fctx.lineTo(loopx + loop_radius - cond_radius, inner_dia_y);
|
|
fctx.lineTo(loopx + loop_radius - cond_radius + arrow_size, inner_dia_y - arrow_size);
|
|
fctx.lineTo(loopx + loop_radius - cond_radius + arrow_size, inner_dia_y + arrow_size);
|
|
fctx.lineTo(loopx + loop_radius - cond_radius, inner_dia_y);
|
|
fctx.lineTo(loopx + loop_radius + 3.0*arrow_size, inner_dia_y);
|
|
fctx.stroke();
|
|
fctx.textAlign = "left";
|
|
fctx.fillText("\u2300i = " + (loop_diameter_inches-0.5*cond_diameter_inches).toFixed(3).toString() + "\"", loopx + loop_radius + 2.0*arrow_size, inner_dia_y - 4);
|
|
fctx.fillText("(" + (loop_diameter_mm-0.5*cond_diameter_mm).toFixed(2).toString() + "mm)", loopx + loop_radius + 2.0*arrow_size, inner_dia_y + 12);
|
|
|
|
// Draw outer-diameter arrows: (for using a winding former)
|
|
/*
|
|
const outer_dia_y = loopy + loop_radius + 0;
|
|
fctx.beginPath();
|
|
fctx.moveTo(loopx - loop_radius - cond_radius, loopy);
|
|
fctx.lineTo(loopx - loop_radius - cond_radius, outer_dia_y);
|
|
fctx.lineTo(loopx - loop_radius - cond_radius - arrow_size, outer_dia_y - arrow_size);
|
|
fctx.lineTo(loopx - loop_radius - cond_radius - arrow_size, outer_dia_y + arrow_size);
|
|
fctx.lineTo(loopx - loop_radius - cond_radius, outer_dia_y);
|
|
fctx.lineTo(loopx - loop_radius - 3.0*arrow_size, outer_dia_y);
|
|
fctx.stroke();
|
|
|
|
fctx.beginPath();
|
|
fctx.moveTo(loopx + loop_radius + cond_radius, loopy);
|
|
fctx.lineTo(loopx + loop_radius + cond_radius, outer_dia_y);
|
|
fctx.lineTo(loopx + loop_radius + cond_radius + arrow_size, outer_dia_y - arrow_size);
|
|
fctx.lineTo(loopx + loop_radius + cond_radius + arrow_size, outer_dia_y + arrow_size);
|
|
fctx.lineTo(loopx + loop_radius + cond_radius, outer_dia_y);
|
|
fctx.lineTo(loopx + loop_radius + 3.0*arrow_size, outer_dia_y);
|
|
fctx.stroke();
|
|
fctx.fillText("\u2300o = " + (loop_diameter_inches+0.5*cond_diameter_inches).toFixed(3).toString() + "\"", loopx + loop_radius + 2.0*arrow_size, outer_dia_y - 4);
|
|
fctx.fillText("(" + (loop_diameter_mm+0.5*cond_diameter_mm).toFixed(2).toString() + "mm)", loopx + loop_radius + 2.0*arrow_size, outer_dia_y + 12);
|
|
*/
|
|
|
|
// Write loop inductance:
|
|
fctx.font = "12px arial";
|
|
fctx.textAlign = "left";
|
|
const L = inductor.L * 1.0e+6;
|
|
fctx.fillText("L = " + L.toPrecision(3).toString() + " \u03bcH", 8, 18);
|
|
fctx.fillText("C = " + (inductor.C * 1e12).toFixed(1) + " pF", 8, 32);
|
|
fctx.fillText("Rdc = " + inductor.Rdc.toFixed(3) + " \u03A9", 8, 46);
|
|
fctx.fillText("SRF = " + (inductor.SRF * 1e-6).toFixed(1) + " MHz", 8, 60);
|
|
const wire_length_m = Math.sqrt((inductor.loop_turns * inductor.spacing_ratio * inductor.cond_diameter_meters)**2 + (Math.PI * inductor.loop_diameter_meters * inductor.loop_turns)**2);
|
|
fctx.fillText("wire = " + (wire_length_m*3.2808).toFixed(2) + "\' (" + wire_length_m.toFixed(2) + "m)", 8, 74);
|
|
|
|
// Draw conductor diameter arrow:
|
|
fctx.beginPath();
|
|
fctx.moveTo(loopx - loop_radius - cond_radius, loopy);
|
|
fctx.lineTo(loopx - loop_radius - cond_radius - arrow_size, loopy - arrow_size);
|
|
fctx.lineTo(loopx - loop_radius - cond_radius - arrow_size, loopy + arrow_size);
|
|
fctx.lineTo(loopx - loop_radius - cond_radius, loopy);
|
|
fctx.lineTo(loopx - loop_radius - 3.0*arrow_size, loopy);
|
|
fctx.stroke();
|
|
|
|
fctx.beginPath();
|
|
fctx.moveTo(loopx - loop_radius + cond_radius, loopy);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius + arrow_size, loopy - arrow_size);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius + arrow_size, loopy + arrow_size);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius, loopy);
|
|
fctx.lineTo(loopx - loop_radius + cond_radius + 2.0*arrow_size, loopy);
|
|
fctx.stroke();
|
|
|
|
//fctx.textAlign = "center";
|
|
//fctx.font = "14px courier";
|
|
//fctx.fillText((40-conductor_diameter_slider.value).toString() + "AWG", loopx, loopy - 6);
|
|
//fctx.font = "12px arial";
|
|
|
|
var cond_spacing = 2.0 * cond_radius * inductor.spacing_ratio;
|
|
if((cond_spacing * inductor.loop_turns) > (0.8 * win_width)) {
|
|
cond_radius = ((0.8 * win_width) / (inductor.loop_turns * 2.0*inductor.spacing_ratio));
|
|
cond_spacing = 2.0 * cond_radius * inductor.spacing_ratio;
|
|
}
|
|
var start_x = win_width/2.0 - inductor.loop_turns * cond_spacing * 0.5;
|
|
var top_y = win_height * 0.56;
|
|
var bot_y = top_y + 2.0 * cond_radius * (inductor.loop_diameter_meters / inductor.cond_diameter_meters);
|
|
var angle = math.atan2((cond_spacing * 0.5), (bot_y - top_y));
|
|
|
|
for (let i = 0; i < inductor.loop_turns; i++) {
|
|
fctx.beginPath();
|
|
fctx.arc(start_x + (i+0.5) * cond_spacing, top_y, cond_radius, Math.PI-angle, -angle, false);
|
|
fctx.arc(start_x + (i+1) * cond_spacing, bot_y, cond_radius, -angle, Math.PI-angle, false);
|
|
fctx.fillStyle = "grey";
|
|
fctx.fill();
|
|
|
|
fctx.beginPath();
|
|
fctx.arc(start_x + (i * cond_spacing), bot_y, cond_radius, angle, Math.PI+angle);
|
|
fctx.arc(start_x + (cond_spacing * 0.5) + i * cond_spacing, top_y, cond_radius, Math.PI+angle, angle);
|
|
fctx.fillStyle = "black";
|
|
fctx.fill();
|
|
}
|
|
|
|
// Draw the wire ends:
|
|
fctx.fillRect(start_x - cond_radius, bot_y, 2.0 * cond_radius, 20);
|
|
fctx.fillStyle = "grey";
|
|
fctx.fillRect(start_x + inductor.loop_turns * cond_spacing - cond_radius, bot_y, 2.0 * cond_radius, 20);
|
|
fctx.fillStyle = "black";
|
|
|
|
// Draw left spacing arrow:
|
|
const dim_y = win_height * 0.88;
|
|
fctx.beginPath();
|
|
fctx.moveTo(start_x - 20, dim_y);
|
|
fctx.lineTo(start_x, dim_y);
|
|
fctx.lineTo(start_x - 7, dim_y + 7)
|
|
fctx.lineTo(start_x - 7, dim_y - 7)
|
|
fctx.lineTo(start_x, dim_y);
|
|
fctx.moveTo(start_x, dim_y - 7);
|
|
fctx.lineTo(start_x, dim_y + 7);
|
|
fctx.stroke();
|
|
|
|
// Draw right spacing arrow:
|
|
fctx.beginPath();
|
|
fctx.moveTo(start_x + cond_spacing + 20, dim_y);
|
|
fctx.lineTo(start_x + cond_spacing, dim_y);
|
|
fctx.lineTo(start_x + cond_spacing + 7, dim_y + 7)
|
|
fctx.lineTo(start_x + cond_spacing + 7, dim_y - 7)
|
|
fctx.lineTo(start_x + cond_spacing, dim_y);
|
|
fctx.moveTo(start_x + cond_spacing, dim_y - 7);
|
|
fctx.lineTo(start_x + cond_spacing, dim_y + 7);
|
|
fctx.stroke();
|
|
|
|
// Draw right length arrow:
|
|
fctx.beginPath();
|
|
fctx.moveTo(start_x + inductor.loop_turns * cond_spacing + 20, dim_y);
|
|
fctx.lineTo(start_x + inductor.loop_turns * cond_spacing, dim_y);
|
|
fctx.lineTo(start_x + inductor.loop_turns * cond_spacing + 7, dim_y + 7)
|
|
fctx.lineTo(start_x + inductor.loop_turns * cond_spacing + 7, dim_y - 7)
|
|
fctx.lineTo(start_x + inductor.loop_turns * cond_spacing, dim_y);
|
|
fctx.moveTo(start_x + inductor.loop_turns * cond_spacing, dim_y - 7);
|
|
fctx.lineTo(start_x + inductor.loop_turns * cond_spacing, dim_y + 7);
|
|
fctx.stroke();
|
|
|
|
// Extended lines:
|
|
fctx.strokeStyle = "grey";
|
|
fctx.beginPath();
|
|
fctx.moveTo(start_x, bot_y + 25);
|
|
fctx.lineTo(start_x, dim_y - 12);
|
|
fctx.moveTo(start_x + cond_spacing, bot_y + 10);
|
|
fctx.lineTo(start_x + cond_spacing, dim_y - 12);
|
|
fctx.moveTo(start_x + inductor.loop_turns * cond_spacing, bot_y + 25);
|
|
fctx.lineTo(start_x + inductor.loop_turns * cond_spacing, dim_y - 12);
|
|
fctx.stroke();
|
|
fctx.strokeStyle = "black";
|
|
|
|
//fctx.textAlign = "center";
|
|
|
|
fctx.font = spacing_font;
|
|
fctx.textAlign = "right";
|
|
fctx.fillText("c/a = " + inductor.spacing_ratio.toFixed(2).toString() + " ", win_width/2, win_height * 0.52);
|
|
|
|
fctx.font = turns_font;
|
|
fctx.textAlign = "left";
|
|
fctx.fillText(" N = " + inductor.loop_turns.toString(), win_width/2, win_height * 0.52);
|
|
|
|
fctx.font = "12px arial";
|
|
|
|
// Draw spacing text: (gap is to avoid collision of spacing and length texts)
|
|
fctx.textAlign = "right";
|
|
var gap = ((inductor.loop_turns * cond_spacing - cond_spacing) < 60) ? (60 - (inductor.loop_turns * cond_spacing - cond_spacing)) : 0;
|
|
const spc = inductor.spacing_ratio * cond_diameter_inches;
|
|
fctx.fillText("c = " + spc.toFixed(3).toString() + "\"", start_x + cond_spacing + 20 - gap, dim_y + 20);
|
|
fctx.fillText("(" + (spc*25.4).toFixed(3).toString() + "mm)", start_x + cond_spacing + 20 - gap, dim_y + 34);
|
|
|
|
// Draw length text:
|
|
const sol_len = inductor.loop_turns * spc;
|
|
fctx.fillText("\u2113 = " + sol_len.toFixed(3).toString() + "\"", start_x + inductor.loop_turns * cond_spacing + 20, dim_y + 20);
|
|
fctx.fillText("(" + (sol_len*25.4).toFixed(1).toString() + "mm)", start_x + inductor.loop_turns * cond_spacing + 20, dim_y + 34);
|
|
|
|
fctx.strokeStyle = "black";
|
|
if(inductor.frequency_hz <= inductor.SRF) {
|
|
fctx.fillStyle = "black";
|
|
} else {
|
|
fctx.fillStyle = "red";
|
|
}
|
|
|
|
//fctx.font = "12px courier";
|
|
fctx.textAlign = "right";
|
|
var freq = 1e-6 * inductor.frequency_hz;
|
|
fctx.font = frequency_font;
|
|
fctx.fillText("f = " + freq.toFixed(2) + " MHz", win_width-18, 18);
|
|
fctx.font = "12px arial";
|
|
fctx.fillText("\u03B4 = " + (inductor.skin_depth * 1e6).toFixed(1) + " \u03BCm", win_width-18, 32);
|
|
fctx.fillText("Rac = " + inductor.Rac.toFixed(2) + " \u03A9", win_width-18, 46);
|
|
fctx.fillText("X\u2097 = " + inductor.Xl.toFixed(1) + " \u03A9", win_width-18, 60);
|
|
var str = "Z = " + inductor.Z.re.toFixed(1);
|
|
if(inductor.Z.im >= 0.0) {
|
|
str += " + j";
|
|
} else {
|
|
str += " - j";
|
|
}
|
|
str += Math.abs(inductor.Z.im).toFixed(1) + " \u03A9";
|
|
fctx.fillText(str, win_width-18, 74);
|
|
//fctx.fillText("Z = " + inductor.Z.re.toFixed(1) + " " + inductor.Z.im.toFixed(1) + "j \u03A9", win_width-18, 74);
|
|
fctx.fillText("|Z| = " + inductor.Z.toPolar().r.toFixed(1) + " \u03A9", win_width-18, 88);
|
|
fctx.fillText("Q = " + inductor.Q.toFixed(1), win_width-18, 102);
|
|
}
|
|
recalculate();
|
|
drawDesign();
|
|
</script>
|
|
</body>
|
|
</html> |