{"id":1851,"date":"2025-01-02T01:51:17","date_gmt":"2025-01-02T01:51:17","guid":{"rendered":"https:\/\/rf-capacitor.com\/?post_type=product&#038;p=1851"},"modified":"2025-01-02T01:51:17","modified_gmt":"2025-01-02T01:51:17","slug":"igbt-snubber-capacitors","status":"publish","type":"product","link":"https:\/\/rf-capacitor.com\/fr\/igbt-snubber-capacitors\/","title":{"rendered":"IGBT Snubber Capacitors"},"content":{"rendered":"<h3 data-sourcepos=\"1:1-1:27\"><strong>IGBT Snubber Capacitors<\/strong><\/h3>\n<p data-sourcepos=\"3:1-3:196\"><span class=\"citation-0 recitation citation-end-0\">In power electronics, IGBTs (Insulated Gate Bipolar Transistors) are widely used for switching applications.<\/span> Cependant, leur vitesse de commutation rapide peut entra\u00eener des effets ind\u00e9sirables tels que :<span class=\"button-container hide-from-message-actions ng-star-inserted\">\u00a0 \u00a0<\/span><\/p>\n<ul data-sourcepos=\"5:1-7:0\">\n<li data-sourcepos=\"5:1-5:148\"><strong><span class=\"citation-1 recitation\">dv\/dt (taux de variation de la tension) \u00e9lev\u00e9 :<\/span><\/strong><span class=\"citation-1 recitation citation-end-1\"> Cela peut provoquer des pointes de tension excessives \u00e0 travers l'IGBT, ce qui risque d'endommager l'appareil.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\"> \u00a0<\/span>\n<div class=\"container ng-tns-c362440147-20 hide\">\n<div class=\"carousel-container ng-tns-c362440147-20\"><\/div>\n<\/div>\n<\/li>\n<li data-sourcepos=\"6:1-7:0\"><strong><span class=\"citation-2 recitation\">Di\/dt (taux de variation du courant) \u00e9lev\u00e9 :<\/span><\/strong><span class=\"citation-2 recitation citation-end-2\"> Cela peut g\u00e9n\u00e9rer des interf\u00e9rences \u00e9lectromagn\u00e9tiques (EMI) et solliciter les circuits associ\u00e9s.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\">\u00a0 \u00a0<\/span>\n<div class=\"container ng-tns-c362440147-21 hide\">\n<div class=\"carousel-container ng-tns-c362440147-21\"><\/div>\n<\/div>\n<\/li>\n<\/ul>\n<h3 data-sourcepos=\"8:1-8:20\"><strong>Circuits Snubber<\/strong><\/h3>\n<p data-sourcepos=\"10:1-10:143\"><span class=\"citation-3 recitation citation-end-3\">Pour att\u00e9nuer ces probl\u00e8mes, on utilise des circuits snubber.<\/span> <span class=\"citation-4 recitation citation-end-4\">Un composant cl\u00e9 de ces circuits est le condensateur snubber.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\">\u00a0<\/span><\/p>\n<h3 data-sourcepos=\"12:1-12:31\"><strong>Fonctionnement des condensateurs de ralentissement de l'IGBT<\/strong><\/h3>\n<ul data-sourcepos=\"14:1-16:0\">\n<li data-sourcepos=\"14:1-14:252\"><strong>Pointes de tension :<\/strong> Lorsque l'IGBT s'\u00e9teint, l'inductance parasite dans le circuit peut provoquer une augmentation rapide de la tension dans l'appareil. <span class=\"citation-5 recitation citation-end-5\">Le condensateur snubber absorbe cette surtension soudaine, limitant la tension de cr\u00eate dans l'IGBT.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\"> \u00a0<\/span>\n<div class=\"container ng-tns-c362440147-23 hide\">\n<div class=\"carousel-container ng-tns-c362440147-23\"><\/div>\n<\/div>\n<\/li>\n<li data-sourcepos=\"15:1-16:0\"><strong>Commutation de courant :<\/strong> <span class=\"citation-6 recitation citation-end-6\">Pendant la transition vers l'arr\u00eat, le condensateur snubber permet au courant de circuler temporairement, ce qui r\u00e9duit le di\/dt et minimise les interf\u00e9rences \u00e9lectromagn\u00e9tiques.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\">\u00a0 \u00a0<\/span>\n<div class=\"container ng-tns-c362440147-24 hide\">\n<div class=\"carousel-container ng-tns-c362440147-24\"><\/div>\n<\/div>\n<\/li>\n<\/ul>\n<h3 data-sourcepos=\"17:1-17:45\"><strong>Principales caract\u00e9ristiques des condensateurs de ralentissement IGBT<\/strong><\/h3>\n<ul data-sourcepos=\"19:1-23:0\">\n<li data-sourcepos=\"19:1-19:88\"><strong>Haute tension :<\/strong> Doit r\u00e9sister aux pics de tension qui se produisent lors de la commutation.<\/li>\n<li data-sourcepos=\"20:1-20:104\"><strong><span class=\"citation-7 recitation\">Faible ESR (r\u00e9sistance s\u00e9rie \u00e9quivalente) :<\/span><\/strong><span class=\"citation-7 recitation citation-end-7\"> Minimise les pertes d'\u00e9nergie dans le condensateur.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\">\u00a0<\/span>\n<div class=\"container ng-tns-c362440147-25 hide\">\n<div class=\"carousel-container ng-tns-c362440147-25\"><\/div>\n<\/div>\n<\/li>\n<li data-sourcepos=\"21:1-21:110\"><strong>Capacit\u00e9 de charge\/d\u00e9charge rapide :<\/strong> Capable d'absorber et de lib\u00e9rer rapidement de l'\u00e9nergie en cas de changement d'activit\u00e9.<\/li>\n<li data-sourcepos=\"22:1-23:0\"><strong>Taille compacte :<\/strong> Pour minimiser l'encombrement des syst\u00e8mes \u00e9lectroniques de puissance.<\/li>\n<\/ul>\n<h3 data-sourcepos=\"24:1-24:31\"><strong>Types de condensateurs de ralentissement IGBT<\/strong><\/h3>\n<ul data-sourcepos=\"26:1-28:0\">\n<li data-sourcepos=\"26:1-26:112\"><strong>Condensateurs \u00e0 film :<\/strong> Ils sont couramment utilis\u00e9s en raison de leur tension nominale \u00e9lev\u00e9e, de leur faible ESR et de leur bonne stabilit\u00e9 \u00e0 la temp\u00e9rature.<\/li>\n<li data-sourcepos=\"27:1-28:0\"><strong><span class=\"citation-8 recitation\">Condensateurs c\u00e9ramiques :<\/span><\/strong><span class=\"citation-8 recitation citation-end-8\"> Ils offrent une capacit\u00e9 \u00e9lev\u00e9e dans un petit bo\u00eetier mais peuvent \u00eatre limit\u00e9s en termes de tension nominale et de stabilit\u00e9 de temp\u00e9rature.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\">\u00a0 \u00a0<\/span>\n<div class=\"container ng-tns-c362440147-26 hide\">\n<div class=\"carousel-container ng-tns-c362440147-26\"><\/div>\n<\/div>\n<\/li>\n<\/ul>\n<h3 data-sourcepos=\"29:1-29:25\"><strong>Consid\u00e9rations relatives \u00e0 la conception<\/strong><\/h3>\n<p data-sourcepos=\"31:1-31:80\">La s\u00e9lection et la conception des condensateurs snubber impliquent un examen minutieux des \u00e9l\u00e9ments suivants :<\/p>\n<ul data-sourcepos=\"33:1-36:0\">\n<li data-sourcepos=\"33:1-33:85\"><strong>Caract\u00e9ristiques de commutation de l'IGBT :<\/strong> Temps d'allumage et d'extinction, courants de pointe et tensions.<\/li>\n<li data-sourcepos=\"34:1-34:69\"><strong>Param\u00e8tres du circuit :<\/strong> Inductance parasite, caract\u00e9ristiques de charge.<\/li>\n<li data-sourcepos=\"35:1-36:0\"><strong><span class=\"citation-9 recitation\">Topologie du circuit snubber :<\/span><\/strong><span class=\"citation-9 recitation citation-end-9\"> Les diff\u00e9rentes configurations de snubber (R-C, RCD) ont des impacts variables sur les performances du circuit.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\"> \u00a0<\/span>\n<div class=\"container ng-tns-c362440147-27 hide\">\n<div class=\"carousel-container ng-tns-c362440147-27\"><\/div>\n<\/div>\n<\/li>\n<\/ul>\n<h3 data-sourcepos=\"37:1-37:40\"><strong>Avantages de l'utilisation de condensateurs tampon<\/strong><\/h3>\n<ul data-sourcepos=\"39:1-42:0\">\n<li data-sourcepos=\"39:1-39:90\"><strong>Am\u00e9lioration de la fiabilit\u00e9 de l'IGBT :<\/strong> R\u00e9duction des contraintes sur l'appareil, d'o\u00f9 une dur\u00e9e de vie plus longue.<\/li>\n<li data-sourcepos=\"40:1-40:68\"><strong>R\u00e9duction des \u00e9missions EMI :<\/strong> Minimise les interf\u00e9rences \u00e9lectromagn\u00e9tiques.<\/li>\n<li data-sourcepos=\"41:1-42:0\"><strong><span class=\"citation-10 recitation\">Am\u00e9lioration de l'efficacit\u00e9 du syst\u00e8me :<\/span><\/strong><span class=\"citation-10 recitation citation-end-10\"> R\u00e9duction des pertes de puissance gr\u00e2ce \u00e0 la diminution des pertes de commutation.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\"> \u00a0<\/span>\n<div class=\"container ng-tns-c362440147-28 hide\">\n<div class=\"carousel-container ng-tns-c362440147-28\"><\/div>\n<\/div>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<table style=\"height: 429px;\" width=\"689\">\n<tbody>\n<tr>\n<td width=\"146\"><strong><b>Produit<\/b><\/strong>\u00a0<strong><b>Nom :<\/b><\/strong><\/td>\n<td width=\"601\">IGBT Snubber Capacitors<\/td>\n<\/tr>\n<tr>\n<td width=\"146\">\n<h4><strong>Description succincte :<\/strong><\/h4>\n<\/td>\n<td width=\"601\">Largement utilis\u00e9 dans l'\u00e9quipement \u00e9lectronique de puissance lorsque la protection contre l'absorption de la tension de cr\u00eate et du courant de cr\u00eate est n\u00e9cessaire.<\/td>\n<\/tr>\n<tr>\n<td width=\"146\"><strong>Plage de capacit\u00e9 :<\/strong><\/td>\n<td width=\"601\">\u00a00,22\u03bcF~3\u03bcF<\/td>\n<\/tr>\n<tr>\n<td width=\"146\"><strong>Tension nominale\uff1a<\/strong><\/td>\n<td width=\"601\">\u00a03000V.DC~10000V.DC<\/td>\n<\/tr>\n<tr>\n<td width=\"146\"><strong>Cap.tol\uff1a<\/strong><\/td>\n<td width=\"601\">\u00a0\u00a0\u00a0\u00b15%\uff08J\uff09 ; \u00b110%\uff08K)<\/td>\n<\/tr>\n<tr>\n<td width=\"146\"><strong>Mod\u00e8le de condensateur :\u00a0<\/strong><\/td>\n<td width=\"601\">\u00a0SMJ-TC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"featured_media":1852,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[40],"product_tag":[],"class_list":{"0":"post-1851","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-snubber-capacitor","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/product\/1851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/comments?post=1851"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/media\/1852"}],"wp:attachment":[{"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/media?parent=1851"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/product_brand?post=1851"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/product_cat?post=1851"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/rf-capacitor.com\/fr\/wp-json\/wp\/v2\/product_tag?post=1851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}