File:Three PWM types.svg
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Size of this PNG preview of this SVG file: 600 × 500 pixels. Other resolutions: 288 × 240 pixels | 576 × 480 pixels | 922 × 768 pixels | 1,229 × 1,024 pixels | 2,458 × 2,048 pixels.
Original file (SVG file, nominally 600 × 500 pixels, file size: 81 KB)
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DescriptionThree PWM types.svg |
Three methods to generate an intersective pwm: leading edge modulation, trailing edge modulation or centered modulation. The reference signal is a sine wave, not plotted. See Image:Pwm.svg for more information. Created in maxima using the following code. trailsignal(t) := t - floor(t);
leadsignal(t) := ceiling(t)-t;
centersignal(t) := 2*abs(t-floor(t-1/2)-1);
freq : 0.05;
sinesignal(t) := (1/2) + (499/1000)*sin(2*%pi*freq*t);
pwmlead(t) := (if(leadsignal(t) > sinesignal(t)) then 0.0 else 1.0);
pwmtrail(t) := (if(trailsignal(t) > sinesignal(t)) then 0.0 else 1.0);
pwmcenter(t) := (if(centersignal(t) > sinesignal(t)) then 0.0 else 1.0);
load(draw);
draw(terminal=svg,file_name="Three_PWM_types",
gr2d(yrange=[-0.25,1.25],nticks=20,grid=true,
user_preamble="set mxtics;set format x "";
set origin 0,0.67; set size 1,.3;set bmargin 0;
set tmargin 0",font="Times",
ylabel="lead",ytics={0,1},axis_bottom=false,
color=green,explicit(leadsignal(x),x,0,19),
color=blue,explicit(pwmlead(x),x,0,19)),
gr2d(yrange=[-0.25,1.25],nticks=20,grid=true,
user_preamble="set mxtics;set format x "";
set origin 0,0.37",font="Times",
ylabel="trail",ytics={0,1},axis_bottom=false,
color=green,explicit(trailsignal(x),x,0,19),
color=blue,explicit(pwmtrail(x),x,0,19)),
gr2d(yrange=[-0.25,1.25],nticks=20,grid=true,
user_preamble="set mxtics;set format x "%1.0f T";
set origin 0,.07",font="Times",
ylabel="center",ytics={0,1},
color=green,explicit(centersignal(x),x,0,19),
color=blue,explicit(pwmcenter(x),x,0,19))
);
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: recreated in vector graphics using maxima.. The original can be viewed here: Three types.png: . Modifications made by Krishnavedala.
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I, the copyright holder of this work, hereby publish it under the following licenses:
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- Under the following conditions:
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- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Original upload log
This image is a derivative work of the following images:
- File:Three_types.png licensed with Cc-by-sa-2.5,2.0,1.0, Cc-by-sa-3.0-migrated, GFDL
- 2006-05-07T17:59:14Z CyrilB 1500x1050 (94800 Bytes) {{Information| |Description=three methods to generate an intersective pwm: leading edge modulation, trailing edge modulation or centered modulation |Source=own work, made with gnuplot 4.0 |Date=7/05/06 |Author=Cyril BUTTAY |P
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27 May 2011
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:16, 27 May 2011 | 600 × 500 (81 KB) | wikimediacommons>Krishnavedala | {{Information |Description=Three methods to generate an intersective pwm: leading edge modulation, trailing edge modulation or centered modulation. The reference signal is a sine wave, not plotted. See Image:Pwm.svg for more information. Created in |
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