//**************************************************************************
// Javascript for inductance calculations.
//**************************************************************************
var Unit_Mult, Unit_Dim;
var Straight_Wire_Radius, Straight_Wire_Length, Straight_Wire_Inductance;
var GS_Wire_Radius, GS_Wire_Length, GS_Wire_Height, GS_Wire_Inductance;
var Strip_Width, Strip_Length, Thickness, Strip_Inductance;
var AWG_Array = new Array(40);
//**************************************************************************
// Straight, Round, Nonmagnetic wire in free space.
//**************************************************************************
function Straight_Wire_Calc() {
//***********************************************************************
// Set up the AWG array
//***********************************************************************
K = Math.pow((0.46/0.005),(1/39)); // Increment Multiplier
for ( I = 1; I <= 40; I++ ) {
N = I+3; AWG_Array[I] = .46/Math.pow(K,N); }
//***********************************************************************
// Get the dimension and wire diameter.
//***********************************************************************
if (document.Straight_Wire.Wire_Dia_Dim.options[0].selected) {
Wire_Dia_Dim = document.Straight_Wire.Wire_Dia_Dim.options[0].value;
Wire_Num = parseInt(document.Straight_Wire.Wire_Size.value);
Wire_Dia = AWG_Array[Wire_Num];
}
else if (document.Straight_Wire.Wire_Dia_Dim.options[1].selected) {
Wire_Dia_Dim = document.Straight_Wire.Wire_Dia_Dim.options[1].value;
Wire_Dia = parseFloat(document.Straight_Wire.Wire_Size.value);
}
else {
Wire_Dia_Dim = document.Straight_Wire.Wire_Dia_Dim.options[2].value;
Wire_Dia = parseFloat(document.Straight_Wire.Wire_Size.value)/25.4;
}
//***********************************************************************
// Get the dimension and wire length.
//***********************************************************************
if (document.Straight_Wire.Wire_Len_Dim.options[0].selected) {
Wire_Len_Dim = document.Straight_Wire.Wire_Len_Dim.options[0].value;
Wire_Len = parseFloat(document.Straight_Wire.Wire_Len.value);
}
else {
Wire_Len_Dim = document.Straight_Wire.Wire_Len_Dim.options[1].value;
Wire_Len = parseFloat(document.Straight_Wire.Wire_Len.value)/25.4;
}
Straight_Wire_Inductance = 0.00508 * Wire_Len * ( Math.log((2*Wire_Len)/Wire_Dia) - 0.75 );
document.Straight_Wire.Wire_Inductance.value = Rnd(Straight_Wire_Inductance,3) + " uH";
}
//**************************************************************************
// Straight wire Parallel to a Ground Plane, with one end Grounded.
//**************************************************************************
function GS_Wire_Calc() {
//***********************************************************************
// Set up the AWG array
//***********************************************************************
K = Math.pow((0.46/0.005),(1/39)); // Increment Multiplier
for ( I = 1; I <= 40; I++ ) {
N = I+3; AWG_Array[I] = .46/Math.pow(K,N); }
//***********************************************************************
// Get the dimension and wire diameter.
//***********************************************************************
if (document.GS_Wire.Wire_Dia_Dim.options[0].selected) {
Wire_Dia_Dim = document.GS_Wire.Wire_Dia_Dim.options[0].value;
Wire_Num = parseInt(document.GS_Wire.Wire_Size.value);
Wire_Radius = AWG_Array[Wire_Num];
}
else if (document.GS_Wire.Wire_Dia_Dim.options[1].selected) {
Wire_Dia_Dim = document.GS_Wire.Wire_Dia_Dim.options[1].value;
Wire_Radius = parseFloat(document.GS_Wire.Wire_Size.value);
}
else {
Wire_Dia_Dim = document.GS_Wire.Wire_Dia_Dim.options[2].value;
Wire_Radius = parseFloat(document.GS_Wire.Wire_Size.value)/25.4;
}
//***********************************************************************
// Get the wire length.
//***********************************************************************
if (document.GS_Wire.Wire_Len_Dim.options[0].selected) {
Wire_Len_Dim = document.GS_Wire.Wire_Len_Dim.options[0].value;
Wire_Length = parseFloat(document.GS_Wire.Wire_Len.value);
}
else {
Wire_Len_Dim = document.GS_Wire.Wire_Len_Dim.options[1].value;
Wire_Length = parseFloat(document.GS_Wire.Wire_Len.value)/25.4;
}
//***********************************************************************
// Get the wire height.
//***********************************************************************
if (document.GS_Wire.Wire_Height_Dim.options[0].selected) {
Wire_Height_Dim = document.GS_Wire.Wire_Height_Dim.options[0].value;
Wire_Height = parseFloat(document.GS_Wire.Wire_Height.value);
}
else {
Wire_Height_Dim = document.GS_Wire.Wire_Height_Dim.options[1].value;
Wire_Height = parseFloat(document.GS_Wire.Wire_Height.value)/25.4;
}
Q1 = Math.sqrt(Math.pow(Wire_Length,2) + Math.pow(Wire_Radius,2));
Q2 = Math.sqrt(Math.pow(Wire_Length,2) + (4*Math.pow(Wire_Height,2)));
Q3 = (2*Wire_Height)/Wire_Radius;
Q4 = Wire_Length/4;
Q5 = 0.0117*Wire_Length*Log_10(Q3*((Wire_Length + Q1)/(Wire_Length + Q2)));
Q6 = 0.00508 * ( Q2-Q1+Q4-(2*Wire_Height)+Wire_Radius );
GS_Wire_Inductance = Q5 + Q6;
document.GS_Wire.Wire_Inductance.value = Rnd(GS_Wire_Inductance,4) + " uH";
}
//**************************************************************************
// Flat Strip
//**************************************************************************
function Flat_Strip_Calc() {
//***********************************************************************
// Get the Strip Width.
//***********************************************************************
if (document.Flat_Strip.Strip_Width_Dim.options[0].selected) {
Strip_Width_Dim = document.Flat_Strip.Strip_Width_Dim.options[0].value;
Strip_Width = parseFloat(document.Flat_Strip.Strip_Width.value);
}
else {
Strip_Width_Dim = document.Flat_Strip.Strip_Width_Dim.options[1].value;
Strip_Width = parseFloat(document.Flat_Strip.Strip_Width.value)/25.4;
}
//***********************************************************************
// Get the Strip Length.
//***********************************************************************
if (document.Flat_Strip.Strip_Length_Dim.options[0].selected) {
Strip_Length_Dim = document.Flat_Strip.Strip_Length_Dim.options[0].value;
Strip_Length = parseFloat(document.Flat_Strip.Strip_Length.value);
}
else {
Strip_Length_Dim = document.Flat_Strip.Strip_Length_Dim.options[1].value;
Strip_Length = parseFloat(document.Flat_Strip.Strip_Length.value)/25.4;
}
//***********************************************************************
// Get the Thickness.
//***********************************************************************
if (document.Flat_Strip.Thickness_Dim.options[0].selected) {
Thickness_Dim = document.Flat_Strip.Thickness_Dim.options[0].value;
Thickness = parseFloat(document.Flat_Strip.Thickness.value);
}
else {
Thickness_Dim = document.Flat_Strip.Thickness_Dim.options[1].value;
Thickness = parseFloat(document.Flat_Strip.Thickness.value)/25.4;
}
Q1 = 0.5+0.2235*((Strip_Width+Thickness)/Strip_Length);
Q2 = Math.log((2*Strip_Length)/(Strip_Width+Thickness));
Strip_Inductance = 0.00508 * Strip_Length * (Q1+Q2);
document.Flat_Strip.Wire_Inductance.value = Rnd(Strip_Inductance,3) + " uH";
}
//**************************************************************************
// Display window with design information.
//**************************************************************************
function View_Ind_Data() {
View_Ind = window.open('','Des_Win',
'menubar=yes,resizable=yes,scrollbars=yes,status=yes,width=550,height=750');
with (View_Ind.document) {
write("\n")
write("\n")
write("Wire/Flat Strip Inductance\n")
write("\n")
write("\n")
write("\n")
write("\n\n")
write("\n\n")
write("\n")
write("JavaScript® Electronic Notebook
\n")
write("\n")
write("Wire/Flat Strip Inductance
\n")
write("\n\n")
write("\n")
write(" \n")
write(" | Inductance of a Straight, Round, Nonmagnetic Wire in Free Space\n")
write(" |
\n")
write(" | Wire Radius:\n")
write(" | " + Rnd(FS_Wire_Radius,3) + "\" (" + DIN2FIN(FS_Wire_Radius,64) + ")\n")
write(" | " + Rnd(FS_Wire_Radius*25.4,2) + " mm\n")
write(" |
\n")
write(" | Wire Length:\n")
write(" | " + Rnd(FS_Wire_Length,3) + "\" (" + DIN2FIN(FS_Wire_Length,64) + ")\n")
write(" | " + Rnd(FS_Wire_Length*25.4,2) + " mm\n")
write(" |
\n")
write(" | Wire Inductance:\n")
write(" | " + Rnd(FS_Wire_Inductance,5) + " uH\n")
write(" |
\n\n")
write("
\n\n")
write("\n")
write(" \n")
write(" | Inductance of a Straight wire Parallel to a Ground Plane, with one end Grounded\n")
write(" |
\n")
write(" | Wire Radius:\n")
write(" | " + Rnd(GS_Wire_Radius,3) + "\" (" + DIN2FIN(GS_Wire_Radius,64) + ")\n")
write(" | " + Rnd(GS_Wire_Radius*25.4,2) + " mm\n")
write(" |
\n")
write(" | Wire Length:\n")
write(" | " + Rnd(GS_Wire_Length,3) + "\" (" + DIN2FIN(GS_Wire_Length,64) + ")\n")
write(" | " + Rnd(GS_Wire_Length*25.4,2) + " mm\n")
write(" |
\n")
write(" | Wire Height:\n")
write(" | " + Rnd(GS_Wire_Height,3) + "\" (" + DIN2FIN(GS_Wire_Height,64) + ")\n")
write(" | " + Rnd(GS_Wire_Height*25.4,2) + " mm\n")
write(" |
\n")
write(" | Wire Inductance:\n")
write(" | " + Rnd(GS_Wire_Inductance,5) + " uH\n")
write(" |
\n\n")
write("
\n\n")
write("\n")
write(" \n")
write(" | Flat Strip over Ground Plane\n")
write(" |
\n")
write(" | Strip Width:\n")
write(" | " + Rnd(Strip_Width,3) + "\" (" + DIN2FIN(Strip_Width,64) + ")\n")
write(" | " + Rnd(Strip_Width*25.4,2) + " mm\n")
write(" |
\n")
write(" | Strip Length:\n")
write(" | " + Rnd(Strip_Length,3) + "\" (" + DIN2FIN(Strip_Length,64) + ")\n")
write(" | " + Rnd(Strip_Length*25.4,2) + " mm\n")
write(" |
\n")
write(" | Thickness:\n")
write(" | " + Rnd(Thickness,3) + "\" (" + DIN2FIN(Thickness,64) + ")\n")
write(" | " + Rnd(Thickness*25.4,2) + " mm\n")
write(" |
\n")
write(" | Strip Inductance:\n")
write(" | " + Rnd(Strip_Inductance,5) + " uH\n")
write(" |
\n\n")
write("
\n\n")
write("\n")
write("\n")
write("Click to view Credits\n")
write("or Return to the Main Index
\n")
write("Java is a trademark of Sun Microsystems, Inc.
\n")
write("JavaScript is a trademark of Netscape Communications Corporation.\n")
write("\n")
write("\n")
write("\n")
close()
} // End of "with (Des_Win.document)" statement
}