{"id":2098,"date":"2026-02-12T03:09:31","date_gmt":"2026-02-12T03:09:31","guid":{"rendered":"https:\/\/yawei-powertransformer.com\/?p=2098"},"modified":"2026-02-12T06:13:23","modified_gmt":"2026-02-12T06:13:23","slug":"how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle","status":"publish","type":"post","link":"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/","title":{"rendered":"Comment fonctionne un transformateur ? Guide complet du principe de fonctionnement des transformateurs"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#Introduction\" >Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#1_The_Basic_Idea_Changing_Voltage_Without_Moving_Parts\" >1. L'id\u00e9e de base : Modifier la tension sans d\u00e9placer de pi\u00e8ces<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#2_The_Core_Principle_Electromagnetic_Induction\" >2. Le principe de base : l'induction \u00e9lectromagn\u00e9tique<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#Step-by-Step_Explanation\" >Explication \u00e9tape par \u00e9tape<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#3_Main_Components_of_a_Transformer\" >3. Principaux composants d'un transformateur<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#31_Magnetic_Core\" >3.1 Noyau magn\u00e9tique<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#32_Primary_Winding\" >3.2 Enroulement primaire<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#33_Secondary_Winding\" >3.3 Enroulement secondaire<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#4_The_Turns_Ratio_How_Voltage_Is_Changed\" >4. Le rapport des tours : Comment la tension est modifi\u00e9e<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#If_N%E2%82%82_%3E_N%E2%82%81\" >Si N\u2082 &gt; N\u2081 :<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#If_N%E2%82%82_%3C_N%E2%82%81\" >Si N\u2082 &lt; N\u2081 :<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#5_Power_and_Current_Relationship\" >5. Pouvoir et relations actuelles<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#6_Energy_Losses_in_a_Transformer\" >6. Pertes d'\u00e9nergie dans un transformateur<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#61_Core_Loss_Iron_Loss\" >6.1 Perte de noyau (perte de fer)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#62_Copper_Loss\" >6.2 Perte de cuivre<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#63_Leakage_Flux\" >6.3 Flux de fuite<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#7_Why_Transformers_Are_Critical_in_Power_Systems\" >7. Pourquoi les transformateurs sont essentiels dans les r\u00e9seaux \u00e9lectriques<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#8_Frequently_Asked_Questions_FAQ\" >8. Foire aux questions (FAQ)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#Q1_Can_a_transformer_work_with_DC_power\" >Q1 : Un transformateur peut-il fonctionner avec du courant continu ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#Q2_Does_a_transformer_change_frequency\" >Q2 : Un transformateur modifie-t-il la fr\u00e9quence ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#Q3_Why_is_the_core_laminated\" >Q3 : Pourquoi le noyau est-il stratifi\u00e9 ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#Q4_What_determines_transformer_size\" >Q4 : Qu'est-ce qui d\u00e9termine la taille d'un transformateur ?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/yawei-powertransformer.com\/fr\/how-does-a-transformer-work-a-complete-guide-to-transformer-working-principle\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"343\" data-end=\"358\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>Introduction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"360\" data-end=\"632\">Les transformateurs sont l'un des composants les plus essentiels des syst\u00e8mes \u00e9lectriques modernes. Des grandes centrales \u00e9lectriques aux r\u00e9seaux de distribution r\u00e9sidentiels, les transformateurs permettent de transmettre efficacement l'\u00e9lectricit\u00e9 sur de longues distances et de fournir des niveaux de tension s\u00fbrs aux utilisateurs finaux.<\/p>\n<p data-start=\"634\" data-end=\"675\">Mais comment fonctionne un transformateur ?<\/p>\n<p data-start=\"677\" data-end=\"918\">Dans ce guide, nous expliquons les <strong data-start=\"707\" data-end=\"740\">principe de fonctionnement du transformateur<\/strong>, y compris l'induction \u00e9lectromagn\u00e9tique, le rapport des tours, la transformation de la tension et le transfert d'\u00e9nergie - d'une mani\u00e8re claire et pratique pour les ing\u00e9nieurs, les \u00e9tudiants et les acheteurs de l'industrie de l'\u00e9nergie.<\/p>\n<hr data-start=\"920\" data-end=\"923\" \/>\n<h2 data-start=\"925\" data-end=\"984\"><span class=\"ez-toc-section\" id=\"1_The_Basic_Idea_Changing_Voltage_Without_Moving_Parts\"><\/span>1. L'id\u00e9e de base : Modifier la tension sans d\u00e9placer de pi\u00e8ces<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"986\" data-end=\"1118\">Un transformateur est un appareil \u00e9lectrique statique qui transf\u00e8re l'\u00e9nergie \u00e9lectrique entre des circuits par l'interm\u00e9diaire de <strong data-start=\"1088\" data-end=\"1117\">induction \u00e9lectromagn\u00e9tique<\/strong>.<\/p>\n<p data-start=\"1120\" data-end=\"1162\">Contrairement aux g\u00e9n\u00e9rateurs ou aux moteurs, les transformateurs :<\/p>\n<ul data-start=\"1164\" data-end=\"1318\">\n<li data-start=\"1164\" data-end=\"1201\">\n<p data-start=\"1166\" data-end=\"1201\">Avoir <strong data-start=\"1171\" data-end=\"1201\">pas de pi\u00e8ces m\u00e9caniques mobiles<\/strong><\/p>\n<\/li>\n<li data-start=\"1202\" data-end=\"1231\">\n<p data-start=\"1204\" data-end=\"1231\">Ne pas produire d'\u00e9lectricit\u00e9<\/p>\n<\/li>\n<li data-start=\"1232\" data-end=\"1287\">\n<p data-start=\"1234\" data-end=\"1287\">Ne pas convertir l'\u00e9nergie \u00e9lectrique en \u00e9nergie m\u00e9canique<\/p>\n<\/li>\n<li data-start=\"1288\" data-end=\"1318\">\n<p data-start=\"1290\" data-end=\"1318\">Il suffit de changer de niveau de tension<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1320\" data-end=\"1329\">Ils le peuvent :<\/p>\n<ul data-start=\"1330\" data-end=\"1403\">\n<li data-start=\"1330\" data-end=\"1366\">\n<p data-start=\"1332\" data-end=\"1366\">Augmenter la tension (augmenter la tension)<\/p>\n<\/li>\n<li data-start=\"1367\" data-end=\"1403\">\n<p data-start=\"1369\" data-end=\"1403\">Abaisser la tension (r\u00e9duire la tension)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1405\" data-end=\"1474\">C'est cette capacit\u00e9 qui rend possible la transmission d'\u00e9nergie sur de longues distances.<\/p>\n<hr data-start=\"1476\" data-end=\"1479\" \/>\n<h2 data-start=\"1481\" data-end=\"1532\"><span class=\"ez-toc-section\" id=\"2_The_Core_Principle_Electromagnetic_Induction\"><\/span>2. Le principe de base : l'induction \u00e9lectromagn\u00e9tique<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1534\" data-end=\"1624\">Le fonctionnement d'un transformateur repose sur <strong data-start=\"1577\" data-end=\"1623\">Loi de Faraday sur l'induction \u00e9lectromagn\u00e9tique<\/strong>.<\/p>\n<h3 data-start=\"1626\" data-end=\"1654\"><span class=\"ez-toc-section\" id=\"Step-by-Step_Explanation\"><\/span>Explication \u00e9tape par \u00e9tape<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol data-start=\"1656\" data-end=\"1927\">\n<li data-start=\"1656\" data-end=\"1711\">\n<p data-start=\"1659\" data-end=\"1711\">Un <strong data-start=\"1662\" data-end=\"1676\">Tension alternative<\/strong> est appliqu\u00e9e \u00e0 l'enroulement primaire.<\/p>\n<\/li>\n<li data-start=\"1712\" data-end=\"1766\">\n<p data-start=\"1715\" data-end=\"1766\">La bobine primaire est travers\u00e9e par un courant alternatif.<\/p>\n<\/li>\n<li data-start=\"1767\" data-end=\"1824\">\n<p data-start=\"1770\" data-end=\"1824\">Cela cr\u00e9e un flux magn\u00e9tique alternatif dans le noyau.<\/p>\n<\/li>\n<li data-start=\"1825\" data-end=\"1877\">\n<p data-start=\"1828\" data-end=\"1877\">Le flux magn\u00e9tique est reli\u00e9 \u00e0 l'enroulement secondaire.<\/p>\n<\/li>\n<li data-start=\"1878\" data-end=\"1927\">\n<p data-start=\"1881\" data-end=\"1927\">Une tension est induite dans l'enroulement secondaire.<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"1929\" data-end=\"1943\">Le point cl\u00e9 :<\/p>\n<blockquote data-start=\"1945\" data-end=\"2027\">\n<p data-start=\"1947\" data-end=\"2027\">Un transformateur ne fonctionne qu'avec du courant alternatif (CA), pas avec du courant continu (CC).<\/p>\n<\/blockquote>\n<p data-start=\"2029\" data-end=\"2082\">Parce que le courant continu ne cr\u00e9e pas de champ magn\u00e9tique changeant.<\/p>\n<p data-start=\"2029\" data-end=\"2082\"><span style=\"font-size: 140%;\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/certified-for-global-power-projects-yawei-transformers-quality-system-testing-and-international-compliance\/\">En savoir plus:Certifi\u00e9 pour les projets d'\u00e9nergie mondiaux - Syst\u00e8me de qualit\u00e9, essais et conformit\u00e9 internationale de Transformateur Yawei<\/a><\/span><\/p>\n<hr data-start=\"2084\" data-end=\"2087\" \/>\n<h2 data-start=\"2089\" data-end=\"2127\"><span class=\"ez-toc-section\" id=\"3_Main_Components_of_a_Transformer\"><\/span>3. Principaux composants d'un transformateur<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2129\" data-end=\"2202\">Pour comprendre le fonctionnement d'un transformateur, il faut conna\u00eetre ses principaux composants.<\/p>\n<h3 data-start=\"2204\" data-end=\"2225\"><span class=\"ez-toc-section\" id=\"31_Magnetic_Core\"><\/span>3.1 Noyau magn\u00e9tique<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2227\" data-end=\"2245\">Le noyau magn\u00e9tique :<\/p>\n<ul data-start=\"2247\" data-end=\"2345\">\n<li data-start=\"2247\" data-end=\"2282\">\n<p data-start=\"2249\" data-end=\"2282\">Fournit un chemin pour le flux magn\u00e9tique<\/p>\n<\/li>\n<li data-start=\"2283\" data-end=\"2323\">\n<p data-start=\"2285\" data-end=\"2323\">Augmente l'efficacit\u00e9 du couplage magn\u00e9tique<\/p>\n<\/li>\n<li data-start=\"2324\" data-end=\"2345\">\n<p data-start=\"2326\" data-end=\"2345\">R\u00e9duit les pertes d'\u00e9nergie<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2347\" data-end=\"2438\">La plupart des <a href=\"https:\/\/yawei-powertransformer.com\/fr\/boutique\/\">transformateur<\/a> sont en acier au silicium lamin\u00e9 pour minimiser les pertes par courants de Foucault.<\/p>\n<hr data-start=\"2440\" data-end=\"2443\" \/>\n<h3 data-start=\"2445\" data-end=\"2468\"><span class=\"ez-toc-section\" id=\"32_Primary_Winding\"><\/span>3.2 Enroulement primaire<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"2470\" data-end=\"2561\">\n<li data-start=\"2470\" data-end=\"2507\">\n<p data-start=\"2472\" data-end=\"2507\">Connect\u00e9 \u00e0 la source d'alimentation d'entr\u00e9e<\/p>\n<\/li>\n<li data-start=\"2508\" data-end=\"2536\">\n<p data-start=\"2510\" data-end=\"2536\">Re\u00e7oit de l'\u00e9nergie \u00e9lectrique<\/p>\n<\/li>\n<li data-start=\"2537\" data-end=\"2561\">\n<p data-start=\"2539\" data-end=\"2561\">Produit un flux magn\u00e9tique<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2563\" data-end=\"2566\" \/>\n<h3 data-start=\"2568\" data-end=\"2593\"><span class=\"ez-toc-section\" id=\"33_Secondary_Winding\"><\/span>3.3 Enroulement secondaire<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"2595\" data-end=\"2684\">\n<li data-start=\"2595\" data-end=\"2618\">\n<p data-start=\"2597\" data-end=\"2618\">Connect\u00e9 \u00e0 la charge<\/p>\n<\/li>\n<li data-start=\"2619\" data-end=\"2645\">\n<p data-start=\"2621\" data-end=\"2645\">Re\u00e7oit la tension induite<\/p>\n<\/li>\n<li data-start=\"2646\" data-end=\"2684\">\n<p data-start=\"2648\" data-end=\"2684\">Alimente le circuit de sortie<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2686\" data-end=\"2689\" \/>\n<h2 data-start=\"2691\" data-end=\"2736\"><span class=\"ez-toc-section\" id=\"4_The_Turns_Ratio_How_Voltage_Is_Changed\"><\/span>4. Le rapport des tours : Comment la tension est modifi\u00e9e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2738\" data-end=\"2810\">La relation la plus importante dans un transformateur est le <strong data-start=\"2794\" data-end=\"2809\">taux de rotation<\/strong>.<\/p>\n<p data-start=\"2812\" data-end=\"2820\">Formule :<\/p>\n<p data-start=\"2822\" data-end=\"2839\">V\u2081 \/ V\u2082 = N\u2081 \/ N\u2082<\/p>\n<p data-start=\"2841\" data-end=\"2847\">O\u00f9 ?<\/p>\n<ul data-start=\"2849\" data-end=\"2968\">\n<li data-start=\"2849\" data-end=\"2873\">\n<p data-start=\"2851\" data-end=\"2873\">V\u2081 = Tension primaire<\/p>\n<\/li>\n<li data-start=\"2874\" data-end=\"2900\">\n<p data-start=\"2876\" data-end=\"2900\">V\u2082 = Tension secondaire<\/p>\n<\/li>\n<li data-start=\"2901\" data-end=\"2933\">\n<p data-start=\"2903\" data-end=\"2933\">N\u2081 = Nombre de tours primaires<\/p>\n<\/li>\n<li data-start=\"2934\" data-end=\"2968\">\n<p data-start=\"2936\" data-end=\"2968\">N\u2082 = Nombre de tours secondaires<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2970\" data-end=\"2985\"><span class=\"ez-toc-section\" id=\"If_N%E2%82%82_%3E_N%E2%82%81\"><\/span>Si N\u2082 &gt; N\u2081 :<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2986\" data-end=\"3027\">\u27a1 Transformateur \u00e9l\u00e9vateur (augmentation de la tension)<\/p>\n<h3 data-start=\"3029\" data-end=\"3044\"><span class=\"ez-toc-section\" id=\"If_N%E2%82%82_%3C_N%E2%82%81\"><\/span>Si N\u2082 &lt; N\u2081 :<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3045\" data-end=\"3088\">\u27a1 Transformateur abaisseur (diminution de la tension)<\/p>\n<p data-start=\"3090\" data-end=\"3098\">Exemple :<\/p>\n<p data-start=\"3100\" data-end=\"3160\">Si le primaire a 100 tours et le secondaire 50 tours :<\/p>\n<ul data-start=\"3162\" data-end=\"3217\">\n<li data-start=\"3162\" data-end=\"3217\">\n<p data-start=\"3164\" data-end=\"3217\">La tension de sortie sera \u00e9gale \u00e0 la moiti\u00e9 de la tension d'entr\u00e9e.<\/p>\n<\/li>\n<\/ul>\n<p><span style=\"font-size: 140%;\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/substation-transformer-a-complete-guide-to-principles-types-selection-and-procurement\/\">En savoir plus:Substation Transformer : Un guide complet des principes, des types, de la s\u00e9lection et de l'approvisionnement<\/a><\/span><\/p>\n<hr data-start=\"3219\" data-end=\"3222\" \/>\n<h2 data-start=\"3224\" data-end=\"3260\"><span class=\"ez-toc-section\" id=\"5_Power_and_Current_Relationship\"><\/span>5. Pouvoir et relations actuelles<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3262\" data-end=\"3288\">Id\u00e9alement (en ignorant les pertes) :<\/p>\n<p data-start=\"3290\" data-end=\"3299\">P\u2081 = P\u2082<\/p>\n<p data-start=\"3301\" data-end=\"3313\">Ce qui signifie que<\/p>\n<p data-start=\"3315\" data-end=\"3332\">V\u2081 \u00d7 I\u2081 = V\u2082 \u00d7 I\u2082<\/p>\n<p data-start=\"3334\" data-end=\"3374\">Si la tension augmente, le courant diminue.<\/p>\n<p data-start=\"3376\" data-end=\"3473\">C'est pourquoi le transport d'\u00e9lectricit\u00e9 utilise une tension \u00e9lev\u00e9e et un courant faible, afin de r\u00e9duire les pertes de transmission.<\/p>\n<hr data-start=\"3475\" data-end=\"3478\" \/>\n<h2 data-start=\"3480\" data-end=\"3516\"><span class=\"ez-toc-section\" id=\"6_Energy_Losses_in_a_Transformer\"><\/span>6. Pertes d'\u00e9nergie dans un transformateur<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3518\" data-end=\"3603\">Bien que les transformateurs aient un rendement \u00e9lev\u00e9 (typiquement 95-99%), il y a des pertes :<\/p>\n<h3 data-start=\"3605\" data-end=\"3634\"><span class=\"ez-toc-section\" id=\"61_Core_Loss_Iron_Loss\"><\/span>6.1 Perte de noyau (perte de fer)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"3635\" data-end=\"3672\">\n<li data-start=\"3635\" data-end=\"3652\">\n<p data-start=\"3637\" data-end=\"3652\">Perte d'hyst\u00e9r\u00e9sis<\/p>\n<\/li>\n<li data-start=\"3653\" data-end=\"3672\">\n<p data-start=\"3655\" data-end=\"3672\">Perte par courants de Foucault<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"3674\" data-end=\"3693\"><span class=\"ez-toc-section\" id=\"62_Copper_Loss\"><\/span>6.2 Perte de cuivre<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"3694\" data-end=\"3726\">\n<li data-start=\"3694\" data-end=\"3726\">\n<p data-start=\"3696\" data-end=\"3726\">Chauffage par r\u00e9sistance dans les enroulements<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"3728\" data-end=\"3748\"><span class=\"ez-toc-section\" id=\"63_Leakage_Flux\"><\/span>6.3 Flux de fuite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3750\" data-end=\"3833\">La conception des transformateurs modernes vise \u00e0 minimiser ces pertes afin d'am\u00e9liorer l'efficacit\u00e9.<\/p>\n<p data-start=\"3750\" data-end=\"3833\"><span style=\"font-size: 140%;\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/transformer-basics-working-principle-structure-and-role-in-power-systems\/\">Read More:Notions de base sur les transformateurs : Principe de fonctionnement, structure et r\u00f4le dans les r\u00e9seaux \u00e9lectriques<\/a><\/span><\/p>\n<hr data-start=\"3835\" data-end=\"3838\" \/>\n<h2 data-start=\"3840\" data-end=\"3892\"><span class=\"ez-toc-section\" id=\"7_Why_Transformers_Are_Critical_in_Power_Systems\"><\/span>7. Pourquoi les transformateurs sont essentiels dans les r\u00e9seaux \u00e9lectriques<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3894\" data-end=\"3915\">Sans transformateur :<\/p>\n<ul data-start=\"3917\" data-end=\"4056\">\n<li data-start=\"3917\" data-end=\"3966\">\n<p data-start=\"3919\" data-end=\"3966\">La transmission sur de longues distances serait inefficace<\/p>\n<\/li>\n<li data-start=\"3967\" data-end=\"4005\">\n<p data-start=\"3969\" data-end=\"4005\">La tension de distribution serait dangereuse<\/p>\n<\/li>\n<li data-start=\"4006\" data-end=\"4056\">\n<p data-start=\"4008\" data-end=\"4056\">L'\u00e9quipement industriel ne pouvait pas fonctionner correctement<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4058\" data-end=\"4077\">Les Transformers permettent :<\/p>\n<ul data-start=\"4079\" data-end=\"4214\">\n<li data-start=\"4079\" data-end=\"4121\">\n<p data-start=\"4081\" data-end=\"4121\">Des centrales \u00e9lectriques pour transmettre \u00e0 haute tension<\/p>\n<\/li>\n<li data-start=\"4122\" data-end=\"4166\">\n<p data-start=\"4124\" data-end=\"4166\">R\u00e9duction progressive de la tension dans les sous-stations<\/p>\n<\/li>\n<li data-start=\"4167\" data-end=\"4214\">\n<p data-start=\"4169\" data-end=\"4214\">Les maisons et les usines re\u00e7oivent une tension utilisable<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"4216\" data-end=\"4219\" \/>\n<h2 data-start=\"4221\" data-end=\"4259\"><span class=\"ez-toc-section\" id=\"8_Frequently_Asked_Questions_FAQ\"><\/span>8. Foire aux questions (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"4261\" data-end=\"4306\"><span class=\"ez-toc-section\" id=\"Q1_Can_a_transformer_work_with_DC_power\"><\/span>Q1 : Un transformateur peut-il fonctionner avec du courant continu ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4307\" data-end=\"4385\">Les transformateurs ont besoin d'un courant alternatif pour cr\u00e9er un flux magn\u00e9tique changeant.<\/p>\n<h3 data-start=\"4387\" data-end=\"4431\"><span class=\"ez-toc-section\" id=\"Q2_Does_a_transformer_change_frequency\"><\/span>Q2 : Un transformateur modifie-t-il la fr\u00e9quence ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4432\" data-end=\"4503\">Non. La fr\u00e9quence reste la m\u00eame du c\u00f4t\u00e9 primaire et du c\u00f4t\u00e9 secondaire.<\/p>\n<h3 data-start=\"4505\" data-end=\"4539\"><span class=\"ez-toc-section\" id=\"Q3_Why_is_the_core_laminated\"><\/span>Q3 : Pourquoi le noyau est-il stratifi\u00e9 ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4540\" data-end=\"4593\">R\u00e9duire les pertes par courants de Foucault et am\u00e9liorer l'efficacit\u00e9.<\/p>\n<h3 data-start=\"4595\" data-end=\"4636\"><span class=\"ez-toc-section\" id=\"Q4_What_determines_transformer_size\"><\/span>Q4 : Qu'est-ce qui d\u00e9termine la taille d'un transformateur ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4637\" data-end=\"4723\">Il s'agit principalement de la puissance nominale (kVA ou MVA), du niveau de tension, du syst\u00e8me de refroidissement et de la classe d'isolation.<\/p>\n<p data-start=\"4637\" data-end=\"4723\"><span style=\"font-size: 140%;\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/types-of-transformers-explained-classification-by-structure-cooling-and-application\/\">Read More:Explication des types de transformateurs : Classification par structure, refroidissement et application<\/a><\/span><\/p>\n<hr data-start=\"4725\" data-end=\"4728\" \/>\n<h2 data-start=\"4730\" data-end=\"4743\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4745\" data-end=\"4982\">Le principe de fonctionnement du transformateur est bas\u00e9 sur l'induction \u00e9lectromagn\u00e9tique. En utilisant un noyau magn\u00e9tique et deux enroulements, les transformateurs transf\u00e8rent efficacement l'\u00e9nergie \u00e9lectrique entre les circuits et modifient les niveaux de tension sans mouvement m\u00e9canique.<\/p>\n<p data-start=\"4984\" data-end=\"5041\">Il est essentiel de comprendre le fonctionnement d'un transformateur :<\/p>\n<ul data-start=\"5043\" data-end=\"5131\">\n<li data-start=\"5043\" data-end=\"5065\">\n<p data-start=\"5045\" data-end=\"5065\">Ing\u00e9nieurs \u00e9lectriciens<\/p>\n<\/li>\n<li data-start=\"5066\" data-end=\"5082\">\n<p data-start=\"5068\" data-end=\"5082\">Acheteurs de services publics<\/p>\n<\/li>\n<li data-start=\"5083\" data-end=\"5100\">\n<p data-start=\"5085\" data-end=\"5100\">Entrepreneurs de CPE<\/p>\n<\/li>\n<li data-start=\"5101\" data-end=\"5131\">\n<p data-start=\"5103\" data-end=\"5131\">Gestionnaires d'installations industrielles<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5133\" data-end=\"5265\">Alors que la demande mondiale d'\u00e9lectricit\u00e9 ne cesse de cro\u00eetre, les transformateurs restent l'un des dispositifs les plus importants de l'infrastructure \u00e9lectrique moderne.<\/p>\n\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f280-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"280\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fr\/wp-json\/wp\/v2\/posts\/2098#wpcf7-f280-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/fr\/wp-json\/wp\/v2\/posts\/2098#wpcf7-f280-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"280\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.4\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f280-o1\" \/><input type=\"hidden\" 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From large power plants to residential distribution networks, transformers make it possible to transmit electricity efficiently over long distances and deliver safe voltage levels to end users. But how does a transformer actually work? In this guide, we explain the transformer working [&#8230;]\n","protected":false},"author":3,"featured_media":2113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[304,301,297,296,300,299,303,298,224,302],"class_list":["post-2098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-ac-power-systems","tag-electrical-engineering-fundamentals","tag-electromagnetic-induction","tag-how-does-a-transformer-work","tag-power-transformer-basics","tag-step-up-and-step-down-transformer","tag-transformer-efficiency","tag-transformer-turns-ratio","tag-transformer-working-principle","tag-voltage-transformation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How Does a Transformer Work? 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