{"id":413200,"date":"2023-02-07T19:25:03","date_gmt":"2023-02-07T18:25:03","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=413200"},"modified":"2023-02-07T19:25:03","modified_gmt":"2023-02-07T18:25:03","slug":"convertisseurs-dc-dc-isoles-pour-vehicules-xev","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/convertisseurs-dc-dc-isoles-pour-vehicules-xev\/","title":{"rendered":"Convertisseurs DC-DC isol\u00e9s pour v\u00e9hicules xEV"},"content":{"rendered":"<table>\n<tbody>\n<tr>\n<td>\n<p>Ces derni\u00e8res ann\u00e9es, les v\u00e9hicules xEV, tels que les v\u00e9hicules hybrides et \u00e9lectriques, ont gagn\u00e9 en popularit\u00e9 \u00e0 mesure que l\u2019industrie s\u2019oriente vers une soci\u00e9t\u00e9 durable. Utilisant primairement l\u2019\u00e9lectricit\u00e9 comme source d\u2019\u00e9nergie, les xEV sont \u00e9quip\u00e9s d\u2019applications uniques tels que les compresseurs \u00e9lectriques pour la climatisation, et les chauffages PTC pour augmenter la temp\u00e9rature de l\u2019habitacle. Et comme ces applications fonctionnent \u00e0 des tensions \u00e9lev\u00e9es, il est n\u00e9cessaire pour des raisons de s\u00e9curit\u00e9 d\u2019isoler le circuit primaire incluant la batterie du circuit secondaire se composant du moteur et d\u2019autres syst\u00e8mes. Cependant, en plus des probl\u00e8mes tels que la grande surface de montage et la consommation d\u2019\u00e9nergie plus \u00e9lev\u00e9e, les configurations de circuits isol\u00e9s conventionnels n\u00e9cessitent d\u2019importantes contre-mesures contre le bruit pour les fr\u00e9quences de commutation qui varient avec le courant de sortie. C\u2019est pourquoi ROHM a r\u00e9cemment d\u00e9velopp\u00e9 un convertisseur flyback DC-DC isol\u00e9, le\u00a0<a href=\"https:\/\/www.rohm.com\/products\/power-management\/dc-dc-converters-ics?page=1&amp;SearchWord=bd7f&amp;PS_ProductGradeText=Automotive#parametricSearch\">BD7Fx05EFJ-C<\/a>\u00a0(<a href=\"https:\/\/www.rohm.com\/products\/power-management\/dc-dc-converters-ics\/bd7f105efj-c-product#productDetail\">BD7F105EFJ-C<\/a>,\u00a0<a href=\"https:\/\/www.rohm.com\/products\/power-management\/dc-dc-converters-ics\/bd7f205efj-c-product\">BD7F205EFJ-C<\/a>) optimis\u00e9 pour les alimentations de Gate Driver dans les applications xEV tels que les compresseurs \u00e9lectriques et les chauffages PTC.<br \/>\nLe nouveau produit de ROHM utilise une configuration de circuit qui permet d\u2019obtenir des caract\u00e9ristiques de fr\u00e9quence de commutation stables sans n\u00e9cessiter de photocoupleur, ce qui r\u00e9duit la taille de l\u2019application ainsi que la charge de travail pour la contre-mesure de conception anti-bruit. L\u2019utilisation de la technologie de conception analogique sup\u00e9rieure de ROHM permet au BD7Fx05EFJ-C d\u2019\u00e9liminer le besoin de photocoupleurs, d\u2019enroulements auxiliaires de transformateur et de composants p\u00e9riph\u00e9riques traditionnellement n\u00e9cessaires pour d\u00e9tecter la tension et l\u2019intensit\u00e9 du c\u00f4t\u00e9 secondaire. En plus de r\u00e9soudre les probl\u00e8mes li\u00e9s aux photocoupleurs, tels que la grande consommation d\u2019\u00e9nergie, la fluctuation de la pr\u00e9cision de d\u00e9tection due \u00e0 la temp\u00e9rature et la d\u00e9t\u00e9rioration au fil du temps, ROHM a aussi am\u00e9lior\u00e9 la miniaturisation en r\u00e9duisant le nombre de composants. En cons\u00e9quence, il est possible de r\u00e9duire de 10 le nombre de composants \u2013 photocoupleur inclus \u2013 (soit une surface de carte de 30 %) utilis\u00e9s pour la d\u00e9tection de courant par rapport aux circuits d\u2019alimentation flyback isol\u00e9s g\u00e9n\u00e9raux.<br \/>\nLe BD7Fx05EFJ-C est \u00e9galement \u00e9quip\u00e9 d\u2019une fonction de contr\u00f4le adaptatif du temps d\u2019activation qui fixe le temps d\u2019activation de la commutation, assurant une fr\u00e9quence stable d\u2019environ 350 kHz quelle que soit la puissance de sortie. Pour \u00eatre conforme \u00e0 la norme CEM automobile CISPR25, il faut concevoir une conception anti-bruit consid\u00e9rable dans la gamme de fr\u00e9quences de 150 kHz \u00e0 300 kHz, mais comme les nouveaux convertisseurs de ROHM ne se situent pas dans cette bande, les contre-mesures contre le bruit peuvent \u00eatre grandement simplifi\u00e9es. Ceci, associ\u00e9 \u00e0 une fonction d\u2019\u00e9talement du spectre qui minimise le bruit rayonn\u00e9, contribue \u00e0 r\u00e9duire le nombre d\u2019efforts \u00e0 fournir pour la conception anti-bruit.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>&nbsp;<\/td>\n<\/tr>\n<tr>\n<td>\n<p><a href=\"http:\/\/www.rohm.com\/\">www.rohm.com<\/a><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>Ces derni\u00e8res ann\u00e9es, les v\u00e9hicules xEV, tels que les v\u00e9hicules hybrides et \u00e9lectriques, ont gagn\u00e9 en popularit\u00e9 \u00e0 mesure que l\u2019industrie s\u2019oriente vers une soci\u00e9t\u00e9 durable. Utilisant primairement l\u2019\u00e9lectricit\u00e9 comme source d\u2019\u00e9nergie, les xEV sont \u00e9quip\u00e9s d\u2019applications uniques tels que les compresseurs \u00e9lectriques pour la climatisation, et les chauffages PTC pour augmenter la temp\u00e9rature de [&hellip;]<\/p>\n","protected":false},"author":36,"featured_media":413201,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[891],"domains":[47],"ppma_author":[1154],"class_list":["post-413200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","tag-automotive-fr","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Convertisseurs DC-DC isol\u00e9s pour v\u00e9hicules xEV ...<\/title>\n<meta name=\"description\" content=\"Ces derni\u00e8res ann\u00e9es, les v\u00e9hicules xEV, tels que les v\u00e9hicules hybrides et \u00e9lectriques, ont gagn\u00e9 en popularit\u00e9 \u00e0 mesure que l\u2019industrie...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/413200\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Convertisseurs DC-DC isol\u00e9s pour v\u00e9hicules xEV\" \/>\n<meta property=\"og:description\" content=\"Ces derni\u00e8res ann\u00e9es, les v\u00e9hicules xEV, tels que les v\u00e9hicules hybrides et \u00e9lectriques, ont gagn\u00e9 en popularit\u00e9 \u00e0 mesure que l\u2019industrie s\u2019oriente vers une soci\u00e9t\u00e9 durable. 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