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Update magloop.html 

Flip the main loop, and add emphasis to loop diameter and cond diameter arrows.
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miguel 2021-09-16 18:51:58 +10:00
rodzic 4d00cfc428
commit 0b1728b89c
1 zmienionych plików z 30 dodań i 14 usunięć
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magloop.html
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@ -110,11 +110,13 @@
<img src="Vcap.png" alt="magloop antenna capacitor voltage"><br>
<img src="I_loop.png" alt="magloop antenna loop current"><br>
<img src="BW.png" alt="magloop antenna bandwidth"><br>
<!-- img src="MultiloopCapacitance.png" alt="magloop antenna multi-turn loop capacitance"><br-->
<br>
<b><u>Change history:</u></b><br>
[16-Sep-21] : Updated equation used for Q to match the one use in the ARRL Antenna Book. Changed to V4. This will affect predictions for V_cap, I_loop and BW. Based on reading
"Impedance, Bandwidth, and Q of Antennas" by A D Yaghjian, IEEE Transactions on Antennas and Propagation, April 2005.<br>
[16-Sep-21] : Added equation graphics for V_cap and I_loop formulas.<br>
[16-Sep-21] : Update to release V4: Updated equation used for Q to match the one use in the ARRL Antenna Book. This will affect predictions for V_cap, I_loop and BW. (Based on confirmation of correct Q equation used in
"Impedance, Bandwidth, and Q of Antennas" by A D Yaghjian, IEEE Transactions on Antennas and Propagation, April 2005.)<br>
[16-Sep-21] : Added equation graphics for V_cap, I_loop and BW formulas.<br>
[16-Sep-21] : Flipped the main-loop graphic to have the capacitor above the coupling capacitor.<br>
[12-Sep-21] : Set maximum values to Q, Vcap and I axes to stop autoscaling. Max Q set to 2000, Vcap to 20 kV and I to 100 A.<br>
[12-Sep-21] : Added formula/equation graphics in Notes section. A few more complex ones, such as effective capacitance and SRF, are still needed.<br>
[12-Sep-21] : Fixed minor error in calculation of resistive loss due to proximity effect.<br>
@ -458,16 +460,21 @@
}
// Specify fonts for changing parameters controlled by the sliders:
var normal_font = "12px arial";
var emphasis_font = "bold 14px arial";
const normal_font = "12px arial";
const emphasis_font = "bold 14px arial";
const emphasis_delay = 1200;
const normal_width = 1;
const emphasis_width = 3;
var loop_dia_timer_handler = 0;
var loop_dia_font = normal_font;
var loop_dia_thickness = normal_width;
loop_diameter_slider.oninput = function() {
if(loop_dia_timer_handler == 0) {
loop_dia_font = emphasis_font;
loop_dia_thickness = emphasis_width;
loop_dia_timer_handler = setTimeout(function(){
loop_dia_font = normal_font;
drawFrontDesign();
@ -477,6 +484,7 @@
clearTimeout(loop_dia_timer_handler);
loop_dia_timer_handler = setTimeout(function(){
loop_dia_font = normal_font;
loop_dia_thickness = normal_width;
drawFrontDesign();
loop_dia_timer_handler = 0;
}, emphasis_delay);
@ -499,10 +507,12 @@
var cond_dia_timer_handler = 0;
var cond_dia_font = normal_font;
var cond_dia_thickness = normal_width;
conductor_diameter_slider.oninput = function() {
if(cond_dia_timer_handler == 0) {
cond_dia_font = emphasis_font;
cond_dia_thickness = emphasis_width;
cond_dia_timer_handler = setTimeout(function(){
cond_dia_font = normal_font;
drawFrontDesign();
@ -512,6 +522,7 @@
clearTimeout(cond_dia_timer_handler);
cond_dia_timer_handler = setTimeout(function(){
cond_dia_font = normal_font;
cond_dia_thickness = normal_width;
drawFrontDesign();
cond_dia_timer_handler = 0;
}, emphasis_delay);
@ -670,27 +681,28 @@
// Draw loop:
fctx.beginPath();
fctx.arc(loopx, loopy, loop_radius + cond_radius, 0.5 * Math.PI + 0.02, 0.5 * Math.PI - 0.02, false);
fctx.arc(loopx, loopy, loop_radius - cond_radius, 0.5 * Math.PI - 0.025, 0.5 * Math.PI + 0.025, true);
fctx.arc(loopx, loopy, loop_radius + cond_radius, -0.5 * Math.PI + 0.025, -0.5 * Math.PI - 0.025, false);
fctx.arc(loopx, loopy, loop_radius - cond_radius, -0.5 * Math.PI - 0.025, -0.5 * Math.PI + 0.025, true);
fctx.closePath();
fctx.fill();
// Draw cap:
fctx.lineWidth = 3;
fctx.beginPath();
fctx.moveTo(loopx - 3, loopy + loop_radius - 3*cond_radius);
fctx.lineTo(loopx - 3, loopy + loop_radius + 3*cond_radius);
fctx.moveTo(loopx + 3, loopy + loop_radius - 3*cond_radius);
fctx.lineTo(loopx + 3, loopy + loop_radius + 3*cond_radius);
fctx.moveTo(loopx - 3, loopy - loop_radius - 3*cond_radius);
fctx.lineTo(loopx - 3, loopy - loop_radius + 3*cond_radius);
fctx.moveTo(loopx + 3, loopy - loop_radius - 3*cond_radius);
fctx.lineTo(loopx + 3, loopy - loop_radius + 3*cond_radius);
fctx.stroke();
fctx.lineWidth = 1;
// Draw coupling loop:
fctx.beginPath();
fctx.arc(loopx, loopy - (loop_radius - loop_radius/5) + cond_radius , loop_radius/5, 0, 2*Math.PI, true);
fctx.arc(loopx, loopy + (loop_radius - loop_radius/5) - cond_radius , loop_radius/5, 0, 2*Math.PI, true);
fctx.stroke();
// Draw loop diameter arrow:
fctx.lineWidth = loop_dia_thickness;
fctx.beginPath();
fctx.moveTo(loopx - loop_radius, loopy);
fctx.lineTo(loopx - loop_radius + 2*cond_radius, loopy - 2*cond_radius);
@ -701,6 +713,7 @@
fctx.lineTo(loopx + loop_radius - 2*cond_radius, loopy - 2*cond_radius);
fctx.lineTo(loopx + loop_radius, loopy);
fctx.stroke();
fctx.lineWidth = normal_width;
// Write loop inductance:
fctx.font = normal_font;
@ -724,6 +737,7 @@
fctx.font = normal_font;
// Draw conductor diameter arrow:
fctx.lineWidth = cond_dia_thickness;
fctx.beginPath();
var p1x = loopx + 0.4 * (loop_radius - cond_radius);
var p1y = loopy + 0.4 * (loop_radius - cond_radius);
@ -754,6 +768,8 @@
fctx.lineTo(p4x, p4y);
fctx.lineTo(p2x, p2y);
fctx.stroke();
fctx.lineWidth = normal_width;
p1x = loopx + 0.4 * (loop_radius - cond_radius);
p1y = loopy + 0.4 * (loop_radius - cond_radius) - 5;
//fctx.textAlign = "right";
@ -761,7 +777,7 @@
fctx.textAlign = "center";
if(units == "metric") {
fctx.font = cond_dia_font;
fctx.fillText("\u2300a = " + cond_dia.toPrecision(3).toString() + " mm", loopx, p1y+2);
fctx.fillText("\u2300a = " + cond_dia.toPrecision(3).toString() + " mm", loopx, p1y+1);
fctx.font = normal_font;
// Write loop area:
fctx.textAlign = "right";
@ -771,7 +787,7 @@
fctx.fillText("circ = " + (Math.PI * dia).toPrecision(3).toString() + " m", win_width-8, win_height * 0.8 + 20);
} else {
fctx.font = cond_dia_font;
fctx.fillText("\u2300a = " + (cond_dia/25.4).toPrecision(3).toString() + "\"", loopx, p1y+2);
fctx.fillText("\u2300a = " + (cond_dia/25.4).toPrecision(3).toString() + "\"", loopx, p1y+1);
fctx.font = normal_font;
// Write loop area:
fctx.textAlign = "right";