Image:Buckboost resistance.png

From Wikipedia, the free encyclopedia

Image
File history
File links

Size of this preview: 800 × 560 pixel
Image in higher resolution (1500 × 1050 pixel, file size: 76 KB, MIME type: image/png)

	This is a file from the Wikimedia Commons. The description on its description page there is shown below.
	Commons is attempting to create a freely licensed media file repository. You can help.

[edit] Summary

Cyril BUTTAY

Evolution of the output voltage of a buck-boost converter with the duty cycle. This shows the influence of the parasitic resistances of the circuit on the performances

This file has been generated using the following gnuplot (version 4.0) code (released under public licence)

# This file is used to plot the domains of continuous and
# discontinuous operation of a buck-boost converter

# graph configuration
set terminal postscript eps enhanced "Times-Roman" 24  color solid
set encoding iso_8859_15
unset title
set line style 1 lt 1 lw 3 pt 0 ps 0
set line style 2 lt 3 lw 3 pt 0 ps 0
set line style 3 lt 2 lw 3 pt 0 ps 0
set border 15 lt 7 lw 4
set mxtics 
set mytics 
set grid xtics ytics
set ylabel "Normalisierte Spannung"
set xlabel "Tastverhältnis"
set format y '%0.1f'
set format x "%0.1f" 
set key 0.6,-5

# normalized voltage for an ideal buck-boost converter
f(x) = x/(x-1)
# normalized voltage for a converter with a highly resistive inductor
g(x) = x/(x-1-1/(10*(1-x)))
# normalized voltage for a converter with a slightly resistive inductor
h(x) = x/(x-1-1/(100*(1-x)))

set output "buckboost_resistance.eps"

# the plot is set as parametric, so each curve is defined by two values: x,y
plot [0:1][-6:0] f(x) ls 2 title 'Ideal inductor (R{_L}=0)', \
        h(x) ls 3 title 'Non-ideal inductor (R/R{_L}=100)',\
        g(x) ls 1 title 'Inductor no ideal (R/R{_L}=10)'

and the conversion in png format is made using convert (linux):

convert -density 300 buckboost_resistance.eps buckboost_resistance_png

[edit] Licensing

I, the author of this work, hereby publish it under the following licenses:

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".