{"id":21048,"date":"2025-10-16T14:45:32","date_gmt":"2025-10-16T13:45:32","guid":{"rendered":"https:\/\/www.techdrive.fr\/?p=21048"},"modified":"2025-10-16T14:45:32","modified_gmt":"2025-10-16T13:45:32","slug":"comment-calculer-une-resistance-de-freinage-industrielle","status":"publish","type":"post","link":"https:\/\/www.techdrive.fr\/en\/comment-calculer-une-resistance-de-freinage-industrielle","title":{"rendered":"How to calculate an industrial braking resistor"},"content":{"rendered":"

Comprendre le r\u00f4le d\u2019une r\u00e9sistance de freinage<\/h2><\/div>
<\/div><\/div>

Dans une installation \u00e9quip\u00e9e d\u2019un variateur de vitesse<\/strong>the r\u00e9sistance de freinage industrielle<\/strong> joue un r\u00f4le essentiel pour dissiper l\u2019\u00e9nergie exc\u00e9dentaire<\/strong> g\u00e9n\u00e9r\u00e9e lors des phases de d\u00e9c\u00e9l\u00e9ration du moteur.<\/p>\n

En effet, lorsqu\u2019un moteur ralentit, il agit comme un g\u00e9n\u00e9rateur : il renvoie de l\u2019\u00e9nergie vers le bus continu du variateur. Sans dispositif de freinage, cette tension monte rapidement, risquant d\u2019endommager le variateur ou de provoquer un arr\u00eat en d\u00e9faut surtension.<\/p>\n

La r\u00e9sistance de freinage permet donc de convertir cette \u00e9nergie en chaleur<\/strong>, garantissant un freinage ma\u00eetris\u00e9 et s\u00e9curis\u00e9<\/strong> du syst\u00e8me.<\/p>\n<\/div><\/div><\/div>

Les param\u00e8tres \u00e0 conna\u00eetre avant le calcul<\/h2><\/div>
<\/div><\/div>

Avant de dimensionner une r\u00e9sistance de freinage, il faut identifier plusieurs param\u00e8tres fondamentaux li\u00e9s \u00e0 votre application :<\/p>\n

    \n
  1. \n

    Puissance du moteur (P)<\/strong> en kilowatts (kW)<\/p>\n<\/li>\n

  2. \n

    Tension du bus continu (Udc)<\/strong> \u2014 g\u00e9n\u00e9ralement :<\/p>\n

      \n
    • \n

      540 V pour un variateur triphas\u00e9 400 V<\/p>\n<\/li>\n

    • \n

      300 V pour un variateur monophas\u00e9 230 V<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      \u00c9nergie \u00e0 dissiper (E)<\/strong> \u2014 d\u00e9pend de la masse en mouvement, de la vitesse et du type de freinage<\/p>\n<\/li>\n

    • \n

      Dur\u00e9e et fr\u00e9quence du freinage<\/strong> \u2014 influence la puissance moyenne absorb\u00e9e<\/p>\n<\/li>\n

    • \n

      Caract\u00e9ristiques du chopper de freinage int\u00e9gr\u00e9<\/strong> au variateur (tension d\u2019enclenchement et de coupure)<\/p>\n<\/li>\n<\/ol>\n<\/div><\/div><\/div>

      M\u00e9thode de calcul de la r\u00e9sistance de freinage<\/h2><\/div>
      <\/div><\/div>

      \u00c9tape 1 : Calcul du courant de freinage<\/h3>\n

      La puissance maximale de freinage que le variateur peut g\u00e9rer est donn\u00e9e par :<\/p>\n

      Pf = (Udc\u00b2) \/ R<\/p>\n

      o\u00f9 :<\/p>\n

        \n
      • \n

        Pf<\/strong> = puissance dissip\u00e9e (W)<\/p>\n<\/li>\n

      • \n

        Udc<\/strong> = tension du bus continu (V)<\/p>\n<\/li>\n

      • \n

        R<\/strong> = valeur de la r\u00e9sistance (\u03a9)<\/p>\n<\/li>\n<\/ul>\n

        \u00c9tape 2 : D\u00e9terminer la valeur de la r\u00e9sistance<\/h3>\n

        Pour trouver R<\/strong>, on isole la variable :<\/p>\n

        R = (Udc\u00b2) \/ Pf<\/p>\n

        azdazd<\/p>\n

        Exemple :
        Pour un variateur avec Udc = 540 V<\/strong> et une puissance de freinage souhait\u00e9e de 3 kW<\/strong> :<\/p>\n

        R = (540\u00b2) \/ 3000 = 97,2 \u03a9<\/p>\n

        La r\u00e9sistance devra donc avoir une valeur proche de 100 \u03a9<\/strong>, capable de dissiper environ 3 kW<\/strong> de puissance.<\/p>\n

        \u00c9tape 3 : V\u00e9rifier la puissance moyenne dissip\u00e9e<\/h3>\n

        Le freinage n\u2019\u00e9tant pas continu, il faut estimer la puissance moyenne<\/strong> :<\/p>\n

        Pmoy = Pf \u00d7 (t_freinage \/ t_cycle)<\/p>\n

        Cela permet de choisir une r\u00e9sistance adapt\u00e9e thermiquement (puissance nominale \u00d7 facteur de service).<\/p>\n<\/div><\/div><\/div>

        Bonnes pratiques de s\u00e9lection et d\u2019installation<\/h2><\/div>
        <\/div><\/div>
          \n
        • \n

          Choisir une r\u00e9sistance certifi\u00e9e pour usage industriel<\/strong>, r\u00e9sistante aux hautes temp\u00e9ratures.<\/p>\n<\/li>\n

        • \n

          La valeur de r\u00e9sistance<\/strong> ne doit jamais \u00eatre inf\u00e9rieure \u00e0 la limite minimale<\/strong> indiqu\u00e9e par le constructeur du variateur (risque de surtension ou destruction du transistor de freinage).<\/p>\n<\/li>\n

        • \n

          Installer la r\u00e9sistance dans un endroit bien ventil\u00e9<\/strong>, \u00e9loign\u00e9e de tout \u00e9l\u00e9ment sensible \u00e0 la chaleur.<\/p>\n<\/li>\n

        • \n

          Privil\u00e9gier un bo\u00eetier m\u00e9tallique perfor\u00e9<\/strong> or radiateur int\u00e9gr\u00e9<\/strong> pour les fortes puissances.<\/p>\n<\/li>\n<\/ul>\n<\/div>

          <\/div><\/div><\/div><\/div>

          Un bon dimensionnement pour un freinage s\u00fbr et efficace<\/h2><\/div>
          <\/div><\/div>

          Bien calculer la r\u00e9sistance de freinage<\/strong> permet d\u2019assurer un freinage rapide, ma\u00eetris\u00e9 et sans dommage<\/strong> pour le variateur.
          Ce calcul d\u00e9pend de la puissance, de la tension du bus continu et du cycle de freinage.
          Un choix adapt\u00e9 garantit \u00e0 la fois la s\u00e9curit\u00e9 du mat\u00e9riel<\/strong> and the performance \u00e9nerg\u00e9tique<\/strong> de l\u2019installation.<\/p>\n<\/div>

          <\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":21053,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99,111],"tags":[],"class_list":["post-21048","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-economie-denergie-et-optimisation","category-parametrage-et-reglages"],"yoast_head":"\nComment calculer une r\u00e9sistance de freinage industrielle - Tech Drive<\/title>\n<meta name=\"description\" content=\"Calculer et dimensionner une r\u00e9sistance de freinage pour vos variateurs de vitesse afin d\u2019assurer un freinage s\u00fbr, efficace et durable.\" \/>\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.techdrive.fr\/en\/comment-calculer-une-resistance-de-freinage-industrielle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment calculer une r\u00e9sistance de freinage industrielle - 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