{"id":2530,"date":"2026-03-09T08:24:00","date_gmt":"2026-03-09T00:24:00","guid":{"rendered":"https:\/\/www.takebrakes.com\/?p=2530"},"modified":"2026-02-24T17:27:51","modified_gmt":"2026-02-24T09:27:51","slug":"how-to-calculate-industrial-brake-torque","status":"publish","type":"post","link":"https:\/\/www.takebrakes.com\/fr\/how-to-calculate-industrial-brake-torque\/","title":{"rendered":"Comment calculer le couple de frein industriel : facteurs de s\u00e9curit\u00e9, inertie et r\u00e8gles de s\u00e9lection pour les grues et les convoyeurs"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Choisir un frein industriel ne consiste pas seulement \u00e0 s\u00e9lectionner un mod\u00e8le qui \u00ab a l'air assez grand \u00bb. Si vous sous-dimensionnez le couple, la charge d\u00e9rivera ou tombera. Si vous sur-dimensionnez, vous casserez des arbres, d\u00e9nuderez des dents de engrenages, et endommagerez des structures avec des chocs d'arr\u00eat brutaux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article provides the <strong>engineering formulas<\/strong> et <strong>safety factors (K-factors)<\/strong> needed to size brakes correctly for hoists, travel drives, and belt conveyors. We will connect these calculations to our product lines, such as <a href=\"https:\/\/www.takebrakes.com\/fr\/ywz13-series-electric-hydraulic-drum-brake\/\"><strong>YWZ13 drum brakes<\/strong><\/a> for general crane duty and <a href=\"https:\/\/www.takebrakes.com\/fr\/sh-series-hydraulic-fail-safe-disc-brakes\/\"><strong>SH fail-safe disc brakes<\/strong><\/a> for high-energy holding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Infographie montrant les entr\u00e9es de la formule : puissance du moteur (P), vitesse (n), et facteur de s\u00e9curit\u00e9 (K).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-the-fundamental-torque-formula\">1) La formule fondamentale du couple<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Commencez avec le couple statique n\u00e9cessaire pour maintenir la puissance nominale du moteur. L'\u00e9quation r\u00e9gissante est :<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">$T_{static} = \\frac{9550 \\times P}{n}$<\/span>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$T_{static}$ :<\/strong> Couple moteur nominal (N\u00b7m)<\/li>\n\n\n\n<li><strong>$P$ :<\/strong> Puissance du moteur (kW)<\/li>\n\n\n\n<li><strong>$n$ :<\/strong> Vitesse de l'arbre de frein (rpm) \u2014 <em>Critique : c'est la vitesse au niveau du frein, pas la sortie de la bo\u00eete !<\/em><\/li>\n\n\n\n<li><strong>9550:<\/strong> Conversion constante de kW\/rpm en N\u00b7m.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exemple :<\/strong> A 45 kW motor running at 750 rpm (common for crane hoists):<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">T_{static} = \\frac{9550 \\times 45}{750} = 573\\ \\text{N\u00b7m}<\/span>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Note: This is just to hold the motor against its own rating. It does not account for gravity, safety, or dynamic stopping.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-applying-the-safety-factor-k\">2) Application du facteur de s\u00e9curit\u00e9 ($K$)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You never select a brake at $T_{static}$. You apply a <strong>Service Factor ($K$)<\/strong> based on the risk and application type.<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">$T_{brake} \\ge T_{static} \\times K$<\/span>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Application<\/th><th>Facteur $K$ recommand\u00e9<\/th><th>Pourquoi ?<\/th><\/tr><\/thead><tbody><tr><td><strong>Levage (mont\u00e9e)<\/strong><\/td><td><strong>$K \\ge 2.0$<\/strong> (Souvent 2.5 pour le m\u00e9tal en fusion)<\/td><td>La gravit\u00e9 est constante. Si le frottement diminue (d\u00e9croissance\/usure), vous avez besoin d'une capacit\u00e9 de r\u00e9serve de 100 % pour \u00e9viter une chute.<\/td><\/tr><tr><td><strong>D\u00e9placement \/ Travers\u00e9e<\/strong><\/td><td><strong>$K \\approx 1.5 \u2013 2.0$<\/strong><\/td><td>Pour s'arr\u00eater dans les limites de vent tout en \u00e9vitant le d\u00e9rapage des roues. Trop de couple ($K&gt;2.5$) provoque le blocage des roues et l'usure des rails.<\/td><\/tr><tr><td><strong>Convoyeurs \u00e0 bande<\/strong><\/td><td><strong>$K \\approx 1.5 \u2013 2.0$<\/strong><\/td><td>Emp\u00eache le recul sur les bandes inclin\u00e9es. La capacit\u00e9 thermique (temps d'arr\u00eat) est souvent plus critique que le couple.<\/td><\/tr><tr><td><strong>Treuils (avec op\u00e9rateur)<\/strong><\/td><td><strong>$K \\ge 3.0$<\/strong> (Souvent deux freins requis)<\/td><td>Exigence de s\u00e9curit\u00e9 extr\u00eame.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Applying to our Example (Hoist):<\/strong>\n<br>Required Brake Torque = $573\\ \\text{N\u00b7m} \\times 2.0 = 1146\\ \\text{N\u00b7m}$.\n<br>You would select a brake rated for at least <strong>1200 N\u00b7m<\/strong> (e.g., a YWZ13-315 or YWZ13-400 model depending on thruster).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-thermal-capacity-the-hidden-killer\">3) Capacit\u00e9 thermique : le tueur cach\u00e9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Calculated torque ensures you can <em>hold<\/em> the load. But can you <em>stop<\/em> it without burning the linings?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-stopping-energy-calculation\">Calcul de l'\u00e9nergie d'arr\u00eat<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Chaque fois que vous vous arr\u00eatez, l'\u00e9nergie cin\u00e9tique se transforme en chaleur.\n<br>\u00c9nergie ($E$) par arr\u00eat (Joules) :<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">E = \\frac{1}{2} J \\omega^2<\/span>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$J$ :<\/strong> Inertie totale du syst\u00e8me refl\u00e9t\u00e9e sur l'arbre de frein (kg\u00b7m\u00b2).<\/li>\n\n\n\n<li><strong>$\\omega$ :<\/strong> Vitesse angulaire (rad\/s) = $rpm \\times \\frac{2\\pi}{60}$.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If $E$ exceeds the brake&#8217;s thermal rating (kJ per hour), the linings will glaze and fade.\n<br><strong>R\u00e8gle empirique :<\/strong> For high-inertia loads (conveyors, large fans), verify the <strong>thermal capacity<\/strong> of the disc\/drum, not just the torque. You may need a <strong>ventilated disc<\/strong> (<a href=\"https:\/\/www.takebrakes.com\/fr\/sh-series-hydraulic-fail-safe-disc-brakes\/\">SH series<\/a>) or a larger drum size just to dissipate heat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-stopping-time-check\">4) V\u00e9rification du temps d'arr\u00eat<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La machine s'arr\u00eatera-t-elle assez vite ?\n<br>Temps de d\u00e9c\u00e9l\u00e9ration ($t$) :<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">t = \\frac{J \\times n}{9.55 \\times (T_{brake} \\pm T_{load})}<\/span>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$T_{brake}$:<\/strong> R\u00e9glage r\u00e9el du couple.<\/li>\n\n\n\n<li><strong>$T_{load}$ :<\/strong> Couple de charge aidant ( ) ou r\u00e9sistant (-) \u00e0 l'arr\u00eat.<\/li>\n\n\n\n<li><strong>R\u00e9sultat :<\/strong> Si $t$ est trop long (&gt; 3-5s pour les palans), la s\u00e9curit\u00e9 est compromise. Si trop court (&lt; 0,5s pour le d\u00e9placement), les chocs de charge casseront les composants.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-selecting-the-right-brake-series\">5) Choisir la bonne s\u00e9rie de freins<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Une fois que vous avez les chiffres, choisissez le mat\u00e9riel :<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>S\u00e9rie<\/th><th>Type<\/th><th>Gamme de couple<\/th><th>Meilleur pour<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/www.takebrakes.com\/fr\/ywz13-series-electric-hydraulic-drum-brake\/\"><strong>YWZ13 \/ YWZ<\/strong><\/a><\/td><td>Ensemble \u00e9lectro-hydraulique \u00e0 tambour<\/td><td>100 \u2013 12 500 N\u00b7m<\/td><td><strong>Grues g\u00e9n\u00e9rales :<\/strong> Ponts EOT, portiques, levage g\u00e9n\u00e9ral. Robuste, entretien facile.<\/td><\/tr><tr><td><a href=\"https:\/\/www.takebrakes.com\/fr\/sh-series-hydraulic-fail-safe-disc-brakes\/\"><strong>SH \/ SB<\/strong><\/a><\/td><td>Disque hydraulique<\/td><td>500 \u2013 30 000  N\u00b7m<\/td><td><strong>Haute r\u00e9sistance :<\/strong> Arr\u00eats \u00e0 grande vitesse, convoyeurs, grues \u00e0 conteneurs. Meilleure dissipation thermique.<\/td><\/tr><tr><td><a href=\"https:\/\/www.takebrakes.com\/fr\/se-series-electromagnetic-fail-safe-brake\/\"><strong>SE \/ DC<\/strong><\/a><\/td><td>Disque \u00e9lectromagn\u00e9tique<\/td><td>5 \u2013 500 N\u00b7m<\/td><td><strong>Pr\u00e9cision \/ Petit :<\/strong> Outils de machine, montage de sc\u00e8ne, petits palans. R\u00e9ponse rapide.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-6-common-selection-pitfalls\">6) Pi\u00e8ges courants dans la s\u00e9lection<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ignorer l'efficacit\u00e9 de la bo\u00eete de vitesses :<\/strong> Si le frein est sur l'arbre \u00e0 grande vitesse, la tra\u00een\u00e9e de la bo\u00eete de vitesses vous aide \u00e0 vous arr\u00eater. Si sur l'arbre \u00e0 basse vitesse (frein de s\u00e9curit\u00e9), ce n'est pas le cas.<\/li>\n\n\n\n<li><strong>Suralimentation des entra\u00eenements de d\u00e9placement :<\/strong> Choisir $K=3.0$ pour un d\u00e9placement de pont de grue garantit le d\u00e9rapage des roues et le balancement des charges. Utilisez $K=1.5$ ou un frein \u00e0 couple variable.<\/li>\n\n\n\n<li><strong>Incompatibilit\u00e9 de tension :<\/strong> Calculer parfaitement le couple mais commander la mauvaise tension de l'actionneur (380V vs 415V vs 460V) signifie que le projet est en pause \u00e0 l'installation.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-need-help-sizing-your-brake\">Besoin d'aide pour dimensionner votre frein ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Arr\u00eatez de deviner. Envoyez-nous la puissance de votre moteur (kW), la vitesse (rpm), et le type d'application (palans\/d\u00e9placement). Notre \u00e9quipe d'ing\u00e9nierie effectuera le calcul, recommandera le bon facteur de s\u00e9curit\u00e9 ($K$), et s\u00e9lectionnera le mod\u00e8le de frein optimal pour votre projet.<\/p>","protected":false},"excerpt":{"rendered":"<p>Selecting an industrial brake isn&#8217;t just about picking a model that &#8220;looks big enough.&#8221; If you undersize the torque, the load will drift or drop. If you oversize it, you&#8217;ll snap shafts, strip gear teeth, and damage structures with brutal stop shocks. This article provides the engineering formulas and safety factors (K-factors) needed to size [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,3],"tags":[],"class_list":["post-2530","post","type-post","status-publish","format-standard","hentry","category-info","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/posts\/2530","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/comments?post=2530"}],"version-history":[{"count":1,"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/posts\/2530\/revisions"}],"predecessor-version":[{"id":2531,"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/posts\/2530\/revisions\/2531"}],"wp:attachment":[{"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/media?parent=2530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/categories?post=2530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.takebrakes.com\/fr\/wp-json\/wp\/v2\/tags?post=2530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}