{"id":611,"date":"2022-09-05T19:55:40","date_gmt":"2022-09-05T19:55:40","guid":{"rendered":"https:\/\/insyte.website\/WordPress\/?post_type=glossary&#038;p=611"},"modified":"2022-11-05T08:58:48","modified_gmt":"2022-11-05T08:58:48","slug":"modulation-de-largeur-dimpulsion","status":"publish","type":"glossary","link":"https:\/\/insyte.website\/WordPress\/glossary\/modulation-de-largeur-dimpulsion\/","title":{"rendered":"Modulation de largeur d&rsquo;impulsion"},"content":{"rendered":"<p>M.L.I : Modulation de largeur d&rsquo;impulsion (en fran&ccedil;ais)<br>P.W.M : Pulse Width Modulation (en anglais)<\/p>\n\n\n\n<p>Cette technique de modulation permet de faire varier la luminosit&eacute; d&rsquo;une led, faire varier la vitesse de rotation d&rsquo;un <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Machine &agrave; courant continu&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Une&amp;nbsp;&amp;lt;strong&amp;gt;machine &agrave; courant continu&amp;lt;\/strong&amp;gt;&amp;nbsp;est une&amp;nbsp;machine &eacute;lectrique. Il s&amp;#039;agit d&amp;#039;un convertisseur&amp;nbsp;&eacute;lectrom&eacute;canique&amp;nbsp;permettant la conversion r&eacute;versible (pouvant fonctionner en moteur ou en g&eacute;n&eacute;rateur).(...)&lt;iframe width=&#039;380&#039; height=&#039;214&#039; src=&#039;https:\/\/www.youtube.com\/embed\/A3b3Km5KVXs&#039; title=&#039;Moteur DC (courant continu), comment &ccedil;a marche?&#039; frameborder=&#039;0&#039; allow=&#039;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture&#039; allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\"  href=\"https:\/\/insyte.website\/WordPress\/glossary\/moteur-a-courant-continu\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>moteur &agrave; courant continu<\/a>, d&rsquo;un moteur <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Brushless motor&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Un&amp;nbsp;&amp;lt;strong&amp;gt;moteur sans balais&amp;lt;\/strong&amp;gt;, ou &laquo;&amp;nbsp;&amp;lt;strong&amp;gt;moteur&amp;nbsp;&amp;lt;em&amp;gt;brushless&amp;lt;\/em&amp;gt;&amp;lt;\/strong&amp;gt;&amp;nbsp;&raquo;, ou&amp;nbsp;&amp;lt;strong&amp;gt;machine synchrone auto-pilot&eacute;e &agrave; aimants permanents&amp;lt;\/strong&amp;gt;, est une&amp;nbsp;machine &eacute;lectrique&amp;nbsp;de la cat&eacute;gorie des&amp;nbsp;machines synchrones, dont le&amp;nbsp;rotor&amp;nbsp;est(...)&lt;iframe width=&#039;380&#039; height=&#039;214&#039; src=&#039;https:\/\/www.youtube.com\/embed\/yiD5nCfmbV0&#039; title=&#039;Brushless Motor - How they work BLDC ESC PWM&#039; frameborder=&#039;0&#039; allow=&#039;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture&#039; allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\"  href=\"https:\/\/insyte.website\/WordPress\/glossary\/brushless-motor\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>brushless<\/a>, etc.<\/p>\n\n\n\n<p class=\"has-theme-palette-1-color has-text-color has-medium-font-size\"><strong>Application &agrave; la variation d&rsquo;intensit&eacute; lumineuse d&rsquo;une LED<\/strong><\/p>\n\n\n\n<p>Pour faire varier la luminosit&eacute; d&rsquo;une LED, la solution &eacute;vidente revient &agrave; sous alimenter la LED. Cela implique une alimentation &agrave; tension variable (du coup beaucoup moins &eacute;vident technologiquement parlant !).<\/p>\n\n\n<style>#kt-layout-id_2fe89e-e4 > .kt-row-column-wrap{align-content:start;}:where(#kt-layout-id_2fe89e-e4 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}#kt-layout-id_2fe89e-e4 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:var( --global-kb-row-default-top, 25px );padding-bottom:var( --global-kb-row-default-bottom, 25px );padding-top:0px;padding-bottom:0px;grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}#kt-layout-id_2fe89e-e4 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){#kt-layout-id_2fe89e-e4 > .kt-row-column-wrap{grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}}@media all and (max-width: 767px){#kt-layout-id_2fe89e-e4 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style>\n<div class=\"wp-block-kadence-rowlayout alignnone\"><div id=\"kt-layout-id_2fe89e-e4\" class=\"kt-row-layout-inner kt-layout-id_2fe89e-e4\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-gutter-default kt-v-gutter-default kt-row-valign-top kt-row-layout-left-golden kt-tab-layout-inherit kt-m-colapse-left-to-right kt-mobile-layout-row\"><style>.kadence-column_c2f859-fe > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_c2f859-fe > .kt-inside-inner-col,.kadence-column_c2f859-fe > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_c2f859-fe > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_c2f859-fe > .kt-inside-inner-col{flex-direction:column;}.kadence-column_c2f859-fe > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_c2f859-fe > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_c2f859-fe{position:relative;}@media all and (max-width: 1024px){.kadence-column_c2f859-fe > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_c2f859-fe > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_c2f859-fe\"><div class=\"kt-inside-inner-col\">\n<p>Il est plus simple d&rsquo;utiliser une faiblesse de l&rsquo;&oelig;il humain. Eh oui&hellip; je ne vais pas vous apprendre qu&rsquo;un film n&rsquo;est qu&rsquo;une succession d&rsquo;images (25 images par secondes en g&eacute;n&eacute;ral). La persistance r&eacute;tinienne de notre vue nous donne l&rsquo;impression de voir r&eacute;ellement un film.<\/p>\n\n\n\n<p>La persistance r&eacute;tinienne est de l&rsquo;ordre de 50 millisecondes (\\(f=\\frac{1}{T}=\\frac{1}{50 \\cdot 10^{-3}}=20&nbsp;Hz\\)) Cela veut dire que l&rsquo;&oelig;il est capable de capturer 20 images par seconde. &nbsp;Au-dessus de ce seuil, il ne verra pas le clignotement des images, en dessous la succession d&rsquo;images est perceptible.<\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column_d1db5c-9f > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_d1db5c-9f > .kt-inside-inner-col,.kadence-column_d1db5c-9f > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_d1db5c-9f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_d1db5c-9f > .kt-inside-inner-col{flex-direction:column;}.kadence-column_d1db5c-9f > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_d1db5c-9f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_d1db5c-9f{position:relative;}@media all and (max-width: 1024px){.kadence-column_d1db5c-9f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_d1db5c-9f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-2 kadence-column_d1db5c-9f\"><div class=\"kt-inside-inner-col\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"165\" src=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/Animhorse.gif\" alt=\"\" class=\"wp-image-1596\"\/><figcaption>Ce dessin anim&eacute; d&rsquo;un cheval galopant est affich&eacute; en 12 images par seconde. La succession d&rsquo;images est perceptible mais l&rsquo;animation donne quand m&ecirc;me l&rsquo;impression d&rsquo;&ecirc;tre assez fluide. (<a href=\"https:\/\/fr.wikipedia.org\/wiki\/Persistance_r%C3%A9tinienne\" target=\"_blank\" rel=\"noreferrer noopener\">Source : Wikip&#xE9;dia<\/a>)<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\n<p>On se sert de notre incapacit&eacute; visuelle &agrave; capturer plus de 20 images par secondes. On va donc faire clignoter (allumer et &eacute;teindre) une LED &agrave; une fr&eacute;quence sup&eacute;rieure &agrave; 20Hz. <\/p>\n\n\n\n<p>Pour exemple la fr&eacute;quence de modulation PWM d&rsquo;une carte Arduino est de l&rsquo;ordre de 976&nbsp;Hz (soit dans le cas d&rsquo;une LED, elle allum&eacute;e et &eacute;teinte 976 fois pas seconde !).<br><strong>Nota :<\/strong> en r&eacute;alit&eacute; la fr&eacute;quence PWM par d&eacute;faut sur un carte Arduino est de 976&nbsp;Hz ou 490&nbsp;Hz en fonction des sorties PWM choisies (cf. <a href=\"https:\/\/passionelectronique.fr\/pwm-arduino\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/passionelectronique.fr\/pwm-arduino\/<\/a> pour explications compl&egrave;tes si besoin) <\/p>\n\n\n\n<p>Ah oui, pas mal l&rsquo;astuce&hellip;. mais je ne comprends toujours pas comment on fait pour faire varier la luminosit&eacute; !?<\/p>\n\n\n\n<p>Simple ! On va jouer sur le <strong>rapport cyclique<\/strong> (Duty cycle) de la tension d&rsquo;alimentation.<\/p>\n\n\n<style>#kt-layout-id_76f5bb-bc > .kt-row-column-wrap{align-content:start;}:where(#kt-layout-id_76f5bb-bc > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}#kt-layout-id_76f5bb-bc > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:var( --global-kb-row-default-top, 25px );padding-bottom:var( --global-kb-row-default-bottom, 25px );padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}#kt-layout-id_76f5bb-bc > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){#kt-layout-id_76f5bb-bc > .kt-row-column-wrap{grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}}@media all and (max-width: 767px){#kt-layout-id_76f5bb-bc > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style>\n<div class=\"wp-block-kadence-rowlayout alignnone\"><div id=\"kt-layout-id_76f5bb-bc\" class=\"kt-row-layout-inner kt-layout-id_76f5bb-bc\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-gutter-default kt-v-gutter-default kt-row-valign-top kt-row-layout-left-golden kt-tab-layout-inherit kt-m-colapse-left-to-right kt-mobile-layout-row\"><style>.kadence-column_4dbda5-47 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_4dbda5-47 > .kt-inside-inner-col,.kadence-column_4dbda5-47 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_4dbda5-47 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_4dbda5-47 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_4dbda5-47 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_4dbda5-47 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_4dbda5-47{position:relative;}@media all and (max-width: 1024px){.kadence-column_4dbda5-47 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_4dbda5-47 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_4dbda5-47\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"527\" height=\"361\" src=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-23.png\" alt=\"\" class=\"wp-image-1615\" srcset=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-23.png 527w, https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-23-300x206.png 300w\" sizes=\"auto, (max-width: 527px) 100vw, 527px\"\/><figcaption>Signal PWM pour 3 rapports cycliques diff&eacute;rents<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n\n<style>.kadence-column_98c104-c6 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_98c104-c6 > .kt-inside-inner-col,.kadence-column_98c104-c6 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_98c104-c6 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_98c104-c6 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_98c104-c6 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_98c104-c6 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_98c104-c6{position:relative;}@media all and (max-width: 1024px){.kadence-column_98c104-c6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_98c104-c6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-2 kadence-column_98c104-c6\"><div class=\"kt-inside-inner-col\">\n<p>Pour un rapport cyclique de 50%, la LED brille, on va dire deux fois moins.<\/p>\n\n\n\n<p>Pour un rapport cyclique de 75%, la LED brille environ &agrave; 75% de son plein &eacute;clat.<\/p>\n\n\n\n<p>Et vous avez compris, &agrave; 25%, la LED brille &agrave; environ 25% de son &eacute;clat. <\/p>\n\n\n\n<p>Le rapport cyclique est variable de 0 &agrave; 100%. La p&eacute;riode T du signal est toujours fixe, on ne &laquo;&nbsp;joue&nbsp;&raquo; que sur le rapport cyclique !<\/p>\n<\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\n<p class=\"has-theme-palette-1-color has-text-color has-medium-font-size\"><strong>Variation de vitesse d&rsquo;un <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Machine &agrave; courant continu&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Une&amp;nbsp;&amp;lt;strong&amp;gt;machine &agrave; courant continu&amp;lt;\/strong&amp;gt;&amp;nbsp;est une&amp;nbsp;machine &eacute;lectrique. Il s&amp;#039;agit d&amp;#039;un convertisseur&amp;nbsp;&eacute;lectrom&eacute;canique&amp;nbsp;permettant la conversion r&eacute;versible (pouvant fonctionner en moteur ou en g&eacute;n&eacute;rateur).(...)&lt;iframe width=&#039;380&#039; height=&#039;214&#039; src=&#039;https:\/\/www.youtube.com\/embed\/A3b3Km5KVXs&#039; title=&#039;Moteur DC (courant continu), comment &ccedil;a marche?&#039; frameborder=&#039;0&#039; allow=&#039;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture&#039; allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\"  href=\"https:\/\/insyte.website\/WordPress\/glossary\/moteur-a-courant-continu\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>moteur &agrave; courant continu<\/a>, d&rsquo;un moteur <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Brushless motor&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Un&amp;nbsp;&amp;lt;strong&amp;gt;moteur sans balais&amp;lt;\/strong&amp;gt;, ou &laquo;&amp;nbsp;&amp;lt;strong&amp;gt;moteur&amp;nbsp;&amp;lt;em&amp;gt;brushless&amp;lt;\/em&amp;gt;&amp;lt;\/strong&amp;gt;&amp;nbsp;&raquo;, ou&amp;nbsp;&amp;lt;strong&amp;gt;machine synchrone auto-pilot&eacute;e &agrave; aimants permanents&amp;lt;\/strong&amp;gt;, est une&amp;nbsp;machine &eacute;lectrique&amp;nbsp;de la cat&eacute;gorie des&amp;nbsp;machines synchrones, dont le&amp;nbsp;rotor&amp;nbsp;est(...)&lt;iframe width=&#039;380&#039; height=&#039;214&#039; src=&#039;https:\/\/www.youtube.com\/embed\/yiD5nCfmbV0&#039; title=&#039;Brushless Motor - How they work BLDC ESC PWM&#039; frameborder=&#039;0&#039; allow=&#039;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture&#039; allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\"  href=\"https:\/\/insyte.website\/WordPress\/glossary\/brushless-motor\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>Brushless<\/a> (ex : moteur de ventilateur de PC)<\/strong><\/p>\n\n\n\n<p>ok pour la persistance r&eacute;tinienne&hellip; mais comment cela se passe t-il pour un moteur, il n&rsquo;a pas de persistance r&eacute;tienne lui !? <\/p>\n\n\n\n<p>Effectivement mais c&rsquo;est tout comme ! Les moteurs ont ce qu&rsquo;on appelle des constantes de temps m&eacute;canique et &eacute;lectrique. La constante de temps m&eacute;canique est bien plus &eacute;lev&eacute;e que la constante de temps m&eacute;canique ainsi seule la constante m&eacute;canique sera consid&eacute;r&eacute;e pour l&rsquo;explication.<\/p>\n\n\n\n<p>Pour illustrer, je vous propose de le faire sur un mod&egrave;le de simulation (<a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;OpenModelica&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;lt;div class=&amp;quot;wp-block-kadence-rowlayout alignnone&amp;quot;&amp;gt;&amp;lt;div id=&amp;quot;kt-layout-id_47e0c9-1e&amp;quot; class=&amp;quot;kt-row-layout-inner kt-layout-id_47e0c9-1e&amp;quot;&amp;gt;&amp;lt;div class=&amp;quot;kt-row-column-wrap kt-has-2-columns kt-gutter-default kt-v-gutter-default kt-row-valign-top kt-row-layout-left-golden kt-tab-layout-inherit kt-m-colapse-left-to-right kt-mobile-layout-row&amp;quot;&amp;gt;&amp;lt;div class=&amp;quot;wp-block-kadence-column inner-column-1 kadence-column_1a6d31-c2&amp;quot;&amp;gt;&amp;lt;div class=&amp;quot;kt-inside-inner-col&amp;quot;&amp;gt;OpenModelica (ou OMedit) est un logiciel de mod&eacute;lisation multiphysique gratuit et tr&egrave;s puissant.&amp;lt;br\/&amp;gt;D&amp;#039;autre logiciels permettent de r&eacute;aliser des mod&egrave;les de simulation multiphysique :&amp;lt;br\/&amp;gt;OpenModelica(...)&amp;lt;\/div&amp;gt;&amp;lt;\/div&amp;gt;&amp;lt;\/div&amp;gt;&amp;lt;\/div&amp;gt;&amp;lt;\/div&amp;gt;&lt;\/div&gt;\"  href=\"https:\/\/insyte.website\/WordPress\/glossary\/openmodelica\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>OpenModelica<\/a>) en alimentant un <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Machine &agrave; courant continu&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Une&amp;nbsp;&amp;lt;strong&amp;gt;machine &agrave; courant continu&amp;lt;\/strong&amp;gt;&amp;nbsp;est une&amp;nbsp;machine &eacute;lectrique. Il s&amp;#039;agit d&amp;#039;un convertisseur&amp;nbsp;&eacute;lectrom&eacute;canique&amp;nbsp;permettant la conversion r&eacute;versible (pouvant fonctionner en moteur ou en g&eacute;n&eacute;rateur).(...)&lt;iframe width=&#039;380&#039; height=&#039;214&#039; src=&#039;https:\/\/www.youtube.com\/embed\/A3b3Km5KVXs&#039; title=&#039;Moteur DC (courant continu), comment &ccedil;a marche?&#039; frameborder=&#039;0&#039; allow=&#039;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture&#039; allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\"  href=\"https:\/\/insyte.website\/WordPress\/glossary\/moteur-a-courant-continu\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>moteur &agrave; courant continu<\/a> par une tension carr&eacute;e de rapport cyclique 50%.<\/p>\n\n\n<style>#kt-layout-id_8e93a6-7d > .kt-row-column-wrap{align-content:start;}:where(#kt-layout-id_8e93a6-7d > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}#kt-layout-id_8e93a6-7d > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:var( --global-kb-row-default-top, 25px );padding-bottom:var( --global-kb-row-default-bottom, 25px );padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, calc(50% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)))minmax(0, calc(50% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)));}#kt-layout-id_8e93a6-7d > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){#kt-layout-id_8e93a6-7d > .kt-row-column-wrap{grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}}@media all and (max-width: 767px){#kt-layout-id_8e93a6-7d > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style>\n<div class=\"wp-block-kadence-rowlayout alignnone\"><div id=\"kt-layout-id_8e93a6-7d\" class=\"kt-row-layout-inner kt-layout-id_8e93a6-7d\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-gutter-default kt-v-gutter-default kt-row-valign-top kt-row-layout-left-golden kt-tab-layout-inherit kt-m-colapse-left-to-right kt-mobile-layout-row  kt-custom-first-width-50  kt-custom-second-width-50\"><style>.kadence-column_5fd681-bc > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_5fd681-bc > .kt-inside-inner-col,.kadence-column_5fd681-bc > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_5fd681-bc > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_5fd681-bc > .kt-inside-inner-col{flex-direction:column;}.kadence-column_5fd681-bc > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_5fd681-bc > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_5fd681-bc{position:relative;}@media all and (max-width: 1024px){.kadence-column_5fd681-bc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_5fd681-bc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_5fd681-bc\"><div class=\"kt-inside-inner-col\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/ConstanteTempsModeleMcc220425.mo\"><img loading=\"lazy\" decoding=\"async\" width=\"790\" height=\"426\" src=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-22.png\" alt=\"\" class=\"wp-image-1621\" srcset=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-22.png 790w, https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-22-300x162.png 300w, https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-22-768x414.png 768w\" sizes=\"auto, (max-width: 790px) 100vw, 790px\"\/><\/a><figcaption>Mod&egrave;le <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Machine &agrave; courant continu&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Une&amp;nbsp;&amp;lt;strong&amp;gt;machine &agrave; courant continu&amp;lt;\/strong&amp;gt;&amp;nbsp;est une&amp;nbsp;machine &eacute;lectrique. Il s&amp;#039;agit d&amp;#039;un convertisseur&amp;nbsp;&eacute;lectrom&eacute;canique&amp;nbsp;permettant la conversion r&eacute;versible (pouvant fonctionner en moteur ou en g&eacute;n&eacute;rateur).(...)&lt;iframe width=&#039;380&#039; height=&#039;214&#039; src=&#039;https:\/\/www.youtube.com\/embed\/A3b3Km5KVXs&#039; title=&#039;Moteur DC (courant continu), comment &ccedil;a marche?&#039; frameborder=&#039;0&#039; allow=&#039;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture&#039; allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\"  href=\"https:\/\/insyte.website\/WordPress\/glossary\/moteur-a-courant-continu\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>MCC<\/a> avec tension variable de forme carr&eacute;e (rapport cyclique 50%, fr&eacute;quence 1000Hz)<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n<style>.kadence-column_00bc12-b6 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_00bc12-b6 > .kt-inside-inner-col,.kadence-column_00bc12-b6 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_00bc12-b6 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_00bc12-b6 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_00bc12-b6 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_00bc12-b6 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_00bc12-b6{position:relative;}@media all and (max-width: 1024px){.kadence-column_00bc12-b6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_00bc12-b6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-2 kadence-column_00bc12-b6\"><div class=\"kt-inside-inner-col\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"728\" height=\"331\" src=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-26.png\" alt=\"\" class=\"wp-image-1624\" srcset=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-26.png 728w, https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-26-300x136.png 300w\" sizes=\"auto, (max-width: 728px) 100vw, 728px\"\/><figcaption>Vitesse obtenue pour une alimentation 6V en permanence (rapport cyclique 100%)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"727\" height=\"325\" src=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-25.png\" alt=\"\" class=\"wp-image-1623\" srcset=\"https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-25.png 727w, https:\/\/insyte.website\/WordPress\/wp-content\/uploads\/2022\/10\/image-25-300x134.png 300w\" sizes=\"auto, (max-width: 727px) 100vw, 727px\"\/><figcaption>Vitesse obtenue pour une alimentation 6V (rapport cyclique 50%, ce qui revient &agrave; une tension moyenne de 3V)<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\n<p>Pour en savoir davantage sur la mod&eacute;lisation d&rsquo;une machine &agrave; courant continue, c&rsquo;est par <a href=\"http:\/\/modelisation-dune-machine-a-courant-continu\">ici <\/a>!<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"How PWM works | Controlling a DC motor with a homemade circuit\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/5nwNKPs2gco?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"has-theme-palette-1-color has-text-color has-medium-font-size\"><strong>PWM avec une carte Arduino<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/passionelectronique.fr\/pwm-arduino\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/passionelectronique.fr\/pwm-arduino\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>M.L.I : Modulation de largeur d&rsquo;impulsion (en fran&ccedil;ais)P.W.M : Pulse Width Modulation (en anglais) Cette technique de modulation permet de faire varier la luminosit&eacute; d&rsquo;une led, faire varier la vitesse de rotation d&rsquo;un <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Machine &#xE0; courant continu&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Une&amp;nbsp;&amp;lt;strong&amp;gt;machine &#xE0; courant continu&amp;lt;\/strong&amp;gt;&amp;nbsp;est une&amp;nbsp;machine &#xE9;lectrique. Il s&amp;#039;agit d&amp;#039;un convertisseur&amp;nbsp;&#xE9;lectrom&#xE9;canique&amp;nbsp;permettant la conversion r&#xE9;versible (pouvant fonctionner en moteur ou en g&#xE9;n&#xE9;rateur).(...)&lt;iframe width='380' height='214' src='https:\/\/www.youtube.com\/embed\/A3b3Km5KVXs' title='Moteur DC (courant continu), comment &#xE7;a marche?' frameborder='0' allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture' allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\" href=\"https:\/\/insyte.website\/WordPress\/glossary\/moteur-a-courant-continu\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>moteur &#xE0; courant continu<\/a>, d&rsquo;un moteur <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Brushless motor&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Un&amp;nbsp;&amp;lt;strong&amp;gt;moteur sans balais&amp;lt;\/strong&amp;gt;, ou &#xAB;&amp;nbsp;&amp;lt;strong&amp;gt;moteur&amp;nbsp;&amp;lt;em&amp;gt;brushless&amp;lt;\/em&amp;gt;&amp;lt;\/strong&amp;gt;&amp;nbsp;&#xBB;, ou&amp;nbsp;&amp;lt;strong&amp;gt;machine synchrone auto-pilot&#xE9;e &#xE0; aimants permanents&amp;lt;\/strong&amp;gt;, est une&amp;nbsp;machine &#xE9;lectrique&amp;nbsp;de la cat&#xE9;gorie des&amp;nbsp;machines synchrones, dont le&amp;nbsp;rotor&amp;nbsp;est(...)&lt;iframe width='380' height='214' src='https:\/\/www.youtube.com\/embed\/yiD5nCfmbV0' title='Brushless Motor - How they work BLDC ESC PWM' frameborder='0' allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture' allowfullscreen&gt;&lt;\/iframe&gt;&lt;\/div&gt;\" href=\"https:\/\/insyte.website\/WordPress\/glossary\/brushless-motor\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>brushless<\/a>, etc. Application &agrave; la variation d&rsquo;intensit&eacute; lumineuse d&rsquo;une LED Pour faire varier la luminosit&eacute; d&rsquo;une&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"glossary-categories":[],"glossary-tags":[],"glossary-languages":[],"class_list":["post-611","glossary","type-glossary","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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