diff --git a/toroid.html b/toroid.html index faad01f..4c689f9 100644 --- a/toroid.html +++ b/toroid.html @@ -7,7 +7,7 @@ -
Miguel VK3CPU - RF Toroid Calculator v0.9b
+
Miguel VK3CPU - RF Toroid Calculator v0.9c
@@ -145,6 +145,13 @@ However, predictions for Q have mixed results when compared to the Micrometals Q-Curve Catalog found HERE. I suggest using their catalog for accurate Q prediction. It has been previously identified that Q values predicted using Micrometal's curve-fit equations do not reconcile with measured Q as discussed here.

+ TODO:
+
    +
  • Add a DC current bias slider.
    • +
  • Consider adding temperature slider.
    • +
  • Add support for transformers (Auto-transformer, dual-winding, isolation, step-up, step-down, etc...).
    • +
+

Change history:
[6-Nov-21]
* Re-enabled PI support.
@@ -320,10 +327,11 @@ '77' : { size : { 'FT240' : { PN:'5977003801', A:61.0, B:35.55, C:12.7, W:106.0, CC:9.20, le:14.5, Ae:1.58, Ve:22.8, Al:3155.0 }, - 'FT140' : { PN:'5977002701', A:35.55, B:23.00, C:12.7, W:33.00, CC:11.20, le:8.90, Ae:0.79, Ve:7.00, Al:2545.0 }, + 'FT140' : { PN:'5977002701', A:35.55, B:23.00, C:12.7, W:33.00, CC:11.20, le:8.90, Ae:0.79, Ve:7.00, Al:2545.0 }, 'FT114' : { PN:'5977001001', A:29.00, B:19.00, C:7.5, W:13.0, CC:19.80, le:7.30, Ae:0.37, Ve:2.70, Al:1365.0 }, - 'FT50' : { PN:'5977000301', A:12.70, B:7.15, C:4.90, W:2.00, CC:22.90, le:2.95, Ae:0.129, Ve:0.38, Al:1180.0 }, - 'FT37' : { PN:'5977000201', A:9.50, B:4.75, C:3.30, W:0.83, CC:28.60, le:2.07, Ae:0.072, Ve:0.15, Al:945.0 }, + 'FT100' : { PN:'5977006401', A:25.40, B:15.50, C:12.7, W:19.0, CC:10.00, le:6.20, Ae:0.62, Ve:3.80, Al:2700.0 }, + 'FT50' : { PN:'5977000301', A:12.70, B:7.15, C:4.90, W:2.00, CC:22.90, le:2.95, Ae:0.129, Ve:0.38, Al:1180.0 }, + 'FT37' : { PN:'5977000201', A:9.50, B:4.75, C:3.30, W:0.83, CC:28.60, le:2.07, Ae:0.072, Ve:0.15, Al:945.0 }, }, manufacturer : "Fair-Rite", mat : "MnZn", @@ -523,10 +531,10 @@ '31' : { size : { 'FT400' : { PN:'2631814002', A:101.6, B:76.2, C:25.4, W:420.0, CC:8.5985, le:27.5, Ae:3.20, Ve:882.5, Al:1461.0 }, - 'FT240' : { PN:'2631803802', A:61.0, B:35.55, C:12.7, W:118.0, CC:9.1627, le:14.5, Ae:1.58, Ve:22.8, Al:1371.0 }, + 'FT240' : { PN:'2631803802', A:61.0, B:35.55, C:12.7, W:118.0, CC:9.1627, le:14.5, Ae:1.58, Ve:22.8, Al:1371.0 }, 'FT200' : { PN:'2631626202', A:50.80, B:25.40, C:38.1, W:278.0, CC:2.3791, le:11.1, Ae:4.65, Ve:51.432, Al:5282.0 }, 'FT114' : { PN:'2631801202', A:29.00, B:19.00, C:13.85, W:25.0, CC:1.0795, le:7.33, Ae:0.679, Ve:4.977, Al:1164.0 }, - 'FT74' : { PN:'2631626302', A:18.70, B:10.15, C:14.65, W:13.3, CC:7.2188, le:4.26, Ae:0.59, Ve:2.513, Al:1741.0 }, + 'FT74' : { PN:'2631626302', A:18.70, B:10.15, C:14.65, W:13.3, CC:7.2188, le:4.26, Ae:0.59, Ve:2.513, Al:1741.0 }, }, manufacturer : "Fair-Rite", mat : "MnZn", @@ -1004,7 +1012,7 @@ const Xs = 2.0 * Math.PI * frequency * this.getInductance(frequency, Bpk); return Xs; }; - + /* this.getWireResistance = function(frequency) { // Calculate AC wire-resistance, using IEC 60287-1-1: - this seemed really hopeless for high-frequencies: const Ks = 1.0; // Solid core conductor @@ -1013,8 +1021,8 @@ const Rac = this.Rdc * (1 + Ys); return Rac; }; - - this.getWireResistance2 = function(frequency, wire_radius_meter) { + */ + this.getWireResistance = function(frequency, wire_radius_meter) { // Al-Asadi equation for AC resistance in Ohms/meter: const mu0 = Math.PI * 4e-7; const cu_sigma = 58e6; @@ -1023,24 +1031,7 @@ const Rac = 1/(Math.PI * cu_sigma * k * (2*wire_radius_meter - k)); return Rac; }; - /* - this.CC = function(N, Ctt) { - if(N) - } - this.getEquivalentCapacitance = function() { - const d0 = 1e3 * this.coated_cond_diameter_meters ; // wire diameter including resin coating - const dc = 1e3 * this.cond_diameter_meters; // wire diameter without coating (core diameter) - const er = 3.0; // resin relative permittivity - const p = 17.24e-6; - const e0 = 8.85418782e-12; - const lt = this.cond_length_meters / this.N; - const q = Math.acos(1 - Math.log(d0/dc)/er); - const Ctt = e0 * lt * ((er*q/Math.log(d0/dc)) + (1/Math.tan(q*0.5)) - (1/Math.tan(p/12))); - const cN = (Ctt / (2 + (Ctt / (C*(N-2))))) + Ctt; - return cN; - } - */ this.I_inductor = function (frequency, voltage) { const K1 = 4.44 * frequency * this.N * this.core.Ae * 1e-8; const K2 = 0.4 * Math.PI * this.N / this.core.le; @@ -1086,13 +1077,12 @@ continue; } - // Current's are within 1% of each other, which is good-enough for now. + // Current's match within 1% of each other, which is good-enough for now. break; } //console.log(count, frequency, i_inductor, i_wire); - const Rac = this.cond_length_meters * this.getWireResistance2(frequency, this.cond_diameter_meters*0.5); - const V = (voltage - voltage_fraction); - //console.log(count, frequency, V, i_wire); + const Rac = this.cond_length_meters * this.getWireResistance(frequency, this.cond_diameter_meters*0.5); + const V = (voltage - voltage_fraction); // Across the inductor. const B = V * 1.0e8 / (4.44 * frequency * this.N * this.core.Ae); const Pd = this.getPdFromfB(frequency, B); const Pw = (i_wire**2 * Rac); @@ -2123,7 +2113,7 @@ function drawInductor(fctx, originX, originY, outerRadius, innerRadius, wireRadius, turns, width, toroid_colour) { let theta = Math.PI/(turns); - var front_originX = originX - 0.5*(1*outerRadius + 20 + width); + var front_originX = originX - 0.5*(1*outerRadius + 20 + width) - 10; originY -= 12; var x1 = 0; @@ -2248,18 +2238,40 @@ } // Draw the Dimensions: + var localx = front_originX - outerRadius - 10; fctx.beginPath(); - fctx.moveTo(front_originX - outerRadius, originY - outerRadius); - fctx.lineTo(front_originX - outerRadius - 20, originY - outerRadius); - fctx.moveTo(front_originX - outerRadius, originY + outerRadius); - fctx.lineTo(front_originX - outerRadius - 20, originY + outerRadius); - fctx.lineTo(front_originX - outerRadius - 20, originY - outerRadius); + fctx.moveTo(localx + 10, originY - outerRadius); + fctx.lineTo(localx, originY - outerRadius); + fctx.moveTo(localx + 10, originY + outerRadius); + fctx.lineTo(localx, originY + outerRadius); + fctx.lineTo(localx, originY - outerRadius); fctx.stroke(); fctx.font = "12px arial"; - fctx.textAlign = "right"; - fctx.fillText((controller.toroid.core.A).toFixed(1) + " mm", front_originX - outerRadius - 24, originY - 6); - fctx.fillText("(" + (controller.toroid.core.A*0.03937).toFixed(3) + "\")", front_originX - outerRadius - 24, originY + 6); + + fctx.save(); + fctx.translate(localx, originY); + fctx.rotate(-Math.PI * 0.5); + fctx.textAlign = "center"; + fctx.fillText((controller.toroid.core.A).toFixed(1) + " mm", 0, -20); + fctx.fillText("(" + (controller.toroid.core.A*0.03937).toFixed(3) + "\")", 0, -6); + fctx.restore(); + + localx = front_originX + outerRadius + 20 + width + 15; + fctx.beginPath(); + fctx.moveTo(localx - 5, originY - innerRadius); + fctx.lineTo(localx, originY - innerRadius); + fctx.lineTo(localx, originY + innerRadius); + fctx.lineTo(localx - 5, originY + innerRadius); + fctx.stroke(); + + fctx.save(); + fctx.translate(localx, originY); + fctx.rotate(-Math.PI * 0.5); + fctx.textAlign = "center"; + fctx.fillText((controller.toroid.core.B).toFixed(1) + " mm", 0, 12); + fctx.fillText("(" + (controller.toroid.core.B*0.03937).toFixed(3) + "\")", 0, 26); + fctx.restore(); } function drawTransformer(fctx, originX, originY, outerRadius, innerRadius, wireRadius, turns) {