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Sci-Wcalc: air_coil_calc
air_coil_calc - Single layer air core solenoid inductor analysis
SYNOPSIS
[L, Q, SRF, len_out, fill_out, lmax] =
air_coil_calc(N, len, fill, AWG, rho, dia, freq, flag)
PARAMETERSINPUT PARAMETERS
- N
: Number of turns
- len
: length of the coil (meters)
- fill
: ratio of coil length to closewound length
- AWG
: wire size (American Wire Gauge)
- rho
: resistivity of wire (ohm-m)
- dia
: inside diameter of coil (meters)
- freq
: analysis frequency (Hertz)
- flag
: used to calculate coil length.
- flag=0 : the length given by len is used.
- flag=1 : the length is calculated from the wire size,
number of turns and fill input.
OUTPUT VALUES
- L
: calculated inductance (Henries)
- Q
: calculated quality factor
- SRF
: calculated self resonant frequency (Hertz)
- len_out
: length used for the analysis (meters)
- fill_out
: fill used for the analysis
- lmax
: maximum (closewound) inductance
DESCRIPTION
Function to analyze the electrical characteristics of a single layer,
uniformly spaced, air core, solenoid inductor. The physical
dimensions of the coil are given as inputs and the inductance, quality
factor, and self resonant frequency are calculated.
EXAMPLE // number of turns
N=5;
// we'll use the fill parameter instead
len=0;
// the coil is 20% longer than the minimum
fill=1.2;
// wire size
AWG=22;
// resistivity of copper (ohm-m)
rho=1.72e-8;
// 0.25 inches inside diameter
dia=0.25*0.0254;
// 10 MHz operation
f=10e6;
// use fill to calculate length
flag=1;
[L,Q,SRF,len_out,fill_out,Lmax] = air_coil_calc(N,len,fill,AWG,rho,dia,f,flag);
disp(sprintf('L=%g nH',L*1e9));
disp(sprintf('Q=%g at %g MHz',Q,f/1e6));
disp(sprintf('Self Resonant Freq=%g MHz',SRF/1e6));
disp(sprintf('Length=%g inches',len_out/0.0254));
disp(sprintf('Fill=%g',fill_out));
disp(sprintf('Lmax=%g nH',Lmax*1e9));
SEE ALSOair_coil_calc
air_coil_syn
coax_calc
coax_syn
coupled_microstrip_calc
coupled_microstrip_syn
ic_microstrip_calc
ic_microstrip_syn
microstrip_calc
microstrip_syn
stripline_calc
stripline_syn
AUTHOR
Dan McMahill
BUGS
None known
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