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Kod Zgłoszenia Packages Projekty Wydania Wiki Aktywność

Fix octagon inductance calc.

pull/2/head
miguel 2023-05-16 17:46:02 +10:00
rodzic 0b0e314045
commit cdbb878630
1 zmienionych plików z 13 dodań i 13 usunięć
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26
magloop.html
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@ -323,6 +323,9 @@
const a_coil_radius = loop_diameter_meters * 0.5;
const coil_length = cond_diameter_meters * spacing_ratio * loop_turns;
const N = loop_turns;
const l = (N>1) ? (coil_length * 100.0) : (cond_diameter_meters * 100.0); // coil length in cm
var retval = 0.0;
if(shape == "circle") {
@ -334,33 +337,30 @@
}
} else
if(shape == "octagon") {
const N = loop_turns;
const s = (100.0 * loop_diameter_meters) * 0.414213; // side length in cm
const l = (N>1) ? (coil_length * 100.0) : (cond_diameter_meters * 100.0); // coil length in cm
const bOn2r = l / (1.09868411*s);
//retval = 1e-6 * 0.016 * (N**2) * s * ( Math.log((2.613*s*N)/((N+1)*l)) + 0.75143 + ((0.07153*(N+1)*l) / (s*N)));
retval = 1e-6 * 0.016 * (N**2) * s * ( Math.log(1.0/bOn2r) + 0.75143 + 0.18693*bOn2r + 0.11969*bOn2r**2 - 0.08234*bOn2r**4);
const bOn2r = l / (1.306563*s);
//retval = 1e-6 * 0.016 * (N**2) * s * ( Math.log((2.613*s*N)/((N+1)*l)) + 0.75143 + ((0.07153*(N+1)*l) / (s*N))); // ARRL Antennas Book 17th Ed
retval = 1e-6 * 0.016 * (N**2) * s * ( Math.log(1.0/bOn2r) + 0.75143 + 0.18693*bOn2r + 0.11969*bOn2r**2 - 0.08234*bOn2r**4); // F W Grover p753
//retval = 1e-6 * 0.016 * (N**2) * s * ( Math.log(s/l) + 1.711976 + 0.075143*(l/s) + 0.017528*(l/s)**2 - 0.001766*(l/s)**4);
} else
if(shape == "hexagon") {
const N = loop_turns;
const s = (100.0 * loop_diameter_meters) * 0.57735; // side length in cm
const l = (N>1) ? (coil_length * 100.0) : (cond_diameter_meters * 100.0); // coil length in cm
const bOn2r = l / (loop_diameter_meters * 115.470);
//retval = 1e-6 * 0.012 * (N**2) * s * ( Math.log((2.0*s*N)/((N+1)*l)) + 0.65533 + ((0.1348*(N+1)*l) / (s*N)));
retval = 1e-6 * 0.012 * (N**2) * s * ( Math.log(1.0/bOn2r) + 0.65533 + 0.26960*bOn2r + 0.07736*bOn2r**2 - 0.05504*bOn2r**4);
//retval = 1e-6 * 0.012 * (N**2) * s * ( Math.log((2.0*s*N)/((N+1)*l)) + 0.65533 + ((0.1348*(N+1)*l) / (s*N))); // ARRL Antennas Book 17th Ed
retval = 1e-6 * 0.012 * (N**2) * s * ( Math.log(1.0/bOn2r) + 0.65533 + 0.26960*bOn2r + 0.07736*bOn2r**2 - 0.05504*bOn2r**4); // F W Grover p753
} else
if(shape == "square") {
const N = loop_turns;
const s = (100.0 * loop_diameter_meters); // side length in cm
const l = (N>1) ? (coil_length * 100.0) : (cond_diameter_meters * 100.0); // coil length in cm
const bOn2r = l / (loop_diameter_meters * 141.4214);
//retval = 1e-6 * 0.008 * (N**2) * s * ( Math.log((1.4142*s*N)/((N+1)*l)) + 0.37942 + ((0.3333*(N+1)*l)/(s*N)));
retval = 1e-6 * 0.008 * (N**2) * s * ( Math.log(1.0/bOn2r) + 0.37942 + 0.47140*bOn2r - 0.014298*bOn2r**2 - 0.02904*bOn2r**4);
//retval = 1e-6 * 0.008 * (N**2) * s * ( Math.log((1.4142*s*N)/((N+1)*l)) + 0.37942 + ((0.3333*(N+1)*l)/(s*N))); // ARRL Antennas Book 17th Ed
retval = 1e-6 * 0.008 * (N**2) * s * ( Math.log(1.0/bOn2r) + 0.37942 + 0.47140*bOn2r - 0.014298*bOn2r**2 - 0.02904*bOn2r**4); // F W Grover p753
}
if(loop_mode == "parallel") {
// then N==2, so divide by 4 to go from serial to parallel inductance:
retval *= 0.25;
}
return retval; // In Henries
}