{"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\/pt\/igbt-snubber-capacitors\/","title":{"rendered":"Condensadores de amortecimento IGBT"},"content":{"rendered":"<h3 data-sourcepos=\"1:1-1:27\"><strong>Condensadores de amortecimento IGBT<\/strong><\/h3>\n<p data-sourcepos=\"3:1-3:196\"><span class=\"citation-0 recitation citation-end-0\">Na eletr\u00f3nica de pot\u00eancia, os IGBT (Trans\u00edstores Bipolares de Porta Isolada) s\u00e3o amplamente utilizados para aplica\u00e7\u00f5es de comuta\u00e7\u00e3o.<\/span> No entanto, as suas velocidades de comuta\u00e7\u00e3o r\u00e1pidas podem conduzir a efeitos indesej\u00e1veis, tais como:<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\">Elevada dv\/dt (taxa de varia\u00e7\u00e3o da tens\u00e3o):<\/span><\/strong><span class=\"citation-1 recitation citation-end-1\"> Isto pode causar picos de tens\u00e3o excessivos no IGBT, danificando potencialmente o dispositivo.<\/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 (taxa de varia\u00e7\u00e3o da corrente) elevado:<\/span><\/strong><span class=\"citation-2 recitation citation-end-2\"> Isto pode gerar interfer\u00eancias electromagn\u00e9ticas (EMI) e sobrecarregar os circuitos associados.<\/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>Circuitos Snubber<\/strong><\/h3>\n<p data-sourcepos=\"10:1-10:143\"><span class=\"citation-3 recitation citation-end-3\">Para atenuar estes problemas, s\u00e3o utilizados circuitos de amortecimento.<\/span> <span class=\"citation-4 recitation citation-end-4\">Um componente chave destes circuitos \u00e9 o condensador de amortecimento.<\/span><span class=\"button-container hide-from-message-actions ng-star-inserted\">\u00a0<\/span><\/p>\n<h3 data-sourcepos=\"12:1-12:31\"><strong>Como funcionam os condensadores de amortecimento do IGBT<\/strong><\/h3>\n<ul data-sourcepos=\"14:1-16:0\">\n<li data-sourcepos=\"14:1-14:252\"><strong>Picos de tens\u00e3o:<\/strong> Quando o IGBT se desliga, a indut\u00e2ncia parasita no circuito pode causar um r\u00e1pido aumento da tens\u00e3o no dispositivo. <span class=\"citation-5 recitation citation-end-5\">O condensador de prote\u00e7\u00e3o absorve este pico s\u00fabito de tens\u00e3o, limitando a tens\u00e3o de pico no 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>Comuta\u00e7\u00e3o de corrente:<\/strong> <span class=\"citation-6 recitation citation-end-6\">Durante a transi\u00e7\u00e3o de desligamento, o capacitor de amortecimento fornece um caminho para a corrente fluir temporariamente, reduzindo o di\/dt e minimizando a EMI.<\/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>Principais carater\u00edsticas dos condensadores de prote\u00e7\u00e3o do IGBT<\/strong><\/h3>\n<ul data-sourcepos=\"19:1-23:0\">\n<li data-sourcepos=\"19:1-19:88\"><strong>Classifica\u00e7\u00e3o de alta tens\u00e3o:<\/strong> Deve suportar as tens\u00f5es de pico que ocorrem durante a comuta\u00e7\u00e3o.<\/li>\n<li data-sourcepos=\"20:1-20:104\"><strong><span class=\"citation-7 recitation\">Baixa ESR (Resist\u00eancia de S\u00e9rie Equivalente):<\/span><\/strong><span class=\"citation-7 recitation citation-end-7\"> Minimiza as perdas de energia no condensador.<\/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>Capacidade de carregamento\/descarregamento r\u00e1pido:<\/strong> Capaz de absorver e libertar rapidamente energia durante os eventos de mudan\u00e7a.<\/li>\n<li data-sourcepos=\"22:1-23:0\"><strong>Tamanho compacto:<\/strong> Para minimizar os requisitos de espa\u00e7o em sistemas electr\u00f3nicos de pot\u00eancia.<\/li>\n<\/ul>\n<h3 data-sourcepos=\"24:1-24:31\"><strong>Tipos de condensadores de prote\u00e7\u00e3o IGBT<\/strong><\/h3>\n<ul data-sourcepos=\"26:1-28:0\">\n<li data-sourcepos=\"26:1-26:112\"><strong>Condensadores de pel\u00edcula:<\/strong> S\u00e3o normalmente utilizados devido \u00e0 sua elevada tens\u00e3o nominal, baixa ESR e boa estabilidade t\u00e9rmica.<\/li>\n<li data-sourcepos=\"27:1-28:0\"><strong><span class=\"citation-8 recitation\">Condensadores de cer\u00e2mica:<\/span><\/strong><span class=\"citation-8 recitation citation-end-8\"> Oferecem elevada capacit\u00e2ncia num pequeno inv\u00f3lucro, mas podem ter limita\u00e7\u00f5es em termos de tens\u00e3o nominal e estabilidade t\u00e9rmica.<\/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>Considera\u00e7\u00f5es sobre a conce\u00e7\u00e3o<\/strong><\/h3>\n<p data-sourcepos=\"31:1-31:80\">A sele\u00e7\u00e3o e a conce\u00e7\u00e3o de condensadores de amortecimento envolvem uma considera\u00e7\u00e3o cuidadosa de:<\/p>\n<ul data-sourcepos=\"33:1-36:0\">\n<li data-sourcepos=\"33:1-33:85\"><strong>Carater\u00edsticas de comuta\u00e7\u00e3o do IGBT:<\/strong> Tempos de ativa\u00e7\u00e3o\/desativa\u00e7\u00e3o, correntes de pico e tens\u00f5es.<\/li>\n<li data-sourcepos=\"34:1-34:69\"><strong>Par\u00e2metros do circuito:<\/strong> Indut\u00e2ncia parasita, carater\u00edsticas de carga.<\/li>\n<li data-sourcepos=\"35:1-36:0\"><strong><span class=\"citation-9 recitation\">Topologia do circuito do amortecedor:<\/span><\/strong><span class=\"citation-9 recitation citation-end-9\"> Diferentes configura\u00e7\u00f5es de amortecedores (R-C, RCD) t\u00eam impactos vari\u00e1veis no desempenho do circuito.<\/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>Vantagens da utiliza\u00e7\u00e3o de condensadores de amortecimento<\/strong><\/h3>\n<ul data-sourcepos=\"39:1-42:0\">\n<li data-sourcepos=\"39:1-39:90\"><strong>Melhoria da fiabilidade do IGBT:<\/strong> Redu\u00e7\u00e3o do stress no dispositivo, o que leva a uma vida \u00fatil mais longa.<\/li>\n<li data-sourcepos=\"40:1-40:68\"><strong>Emiss\u00f5es EMI reduzidas:<\/strong> Minimiza as interfer\u00eancias electromagn\u00e9ticas.<\/li>\n<li data-sourcepos=\"41:1-42:0\"><strong><span class=\"citation-10 recitation\">Melhoria da efici\u00eancia do sistema:<\/span><\/strong><span class=\"citation-10 recitation citation-end-10\"> Perdas de pot\u00eancia reduzidas devido a menores perdas de comuta\u00e7\u00e3o.<\/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>Produto<\/b><\/strong>\u00a0<strong><b>Nome:<\/b><\/strong><\/td>\n<td width=\"601\">Condensadores de amortecimento IGBT<\/td>\n<\/tr>\n<tr>\n<td width=\"146\">\n<h4><strong>Breve descri\u00e7\u00e3o:<\/strong><\/h4>\n<\/td>\n<td width=\"601\">Amplamente utilizado em equipamentos electr\u00f3nicos de pot\u00eancia quando a tens\u00e3o de pico, prote\u00e7\u00e3o de absor\u00e7\u00e3o de corrente de pico<\/td>\n<\/tr>\n<tr>\n<td width=\"146\"><strong>Gama de capacit\u00e2ncias:<\/strong><\/td>\n<td width=\"601\">\u00a00,22\u03bcF~3\u03bcF<\/td>\n<\/tr>\n<tr>\n<td width=\"146\"><strong>Tens\u00e3o nominal\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>Modelo de condensador:\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\/pt\/wp-json\/wp\/v2\/product\/1851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/comments?post=1851"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/media\/1852"}],"wp:attachment":[{"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/media?parent=1851"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/product_brand?post=1851"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/product_cat?post=1851"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/rf-capacitor.com\/pt\/wp-json\/wp\/v2\/product_tag?post=1851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}