{"id":2374,"date":"2026-02-07T09:44:00","date_gmt":"2026-02-07T01:44:00","guid":{"rendered":"https:\/\/www.takebrakes.com\/?p=2374"},"modified":"2026-02-05T14:43:13","modified_gmt":"2026-02-05T06:43:13","slug":"why-does-a-dc-electromagnetic-brake-have-weak-holding-or-weak-pull-in-on-a-crane","status":"publish","type":"post","link":"https:\/\/www.takebrakes.com\/pt\/why-does-a-dc-electromagnetic-brake-have-weak-holding-or-weak-pull-in-on-a-crane\/","title":{"rendered":"Por que um freio eletromagn\u00e9tico de corrente cont\u00ednua tem uma reten\u00e7\u00e3o fraca ou um \u201cpuxar fraco\u201d num guindaste?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A DC electromagnetic brake that pulls in weakly usually points to an electrical supply or air-gap issue. On overhead crane and gantry crane motor brakes, the most common causes are <strong>undervoltage<\/strong>, incorrect rectifier selection, excessive voltage drop due to long cables, loose terminals, or an incorrect coil rating (110V vs 220V). A failing power supply box\/rectifier can also create high ripple DC, causing buzzing and reduced magnetic force.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fatores mec\u00e2nicos podem amplificar a fraqueza el\u00e9trica. Se o espa\u00e7o de ar for demasiado grande devido a desgaste ou m\u00e1 regulagem, a bobina pode n\u00e3o desenvolver for\u00e7a suficiente para libertar completamente ou atrair totalmente o armadura. Sujeira, corros\u00e3o ou superf\u00edcies deformadas do armadura tamb\u00e9m podem impedir o contacto total. A solu\u00e7\u00e3o \u00e9 medir a voltagem da bobina nos terminais do trav\u00e3o sob carga, confirmar as especifica\u00e7\u00f5es do retificador, verificar a resist\u00eancia da bobina e reajustar o espa\u00e7o de ar aos limites OEM. Uma fonte de energia el\u00e9trica fi\u00e1vel \u00e9 essencial para uma liberta\u00e7\u00e3o consistente do trav\u00e3o e opera\u00e7\u00e3o segura.<\/p>","protected":false},"excerpt":{"rendered":"<p>A DC electromagnetic brake that pulls in weakly usually points to an electrical supply or air-gap issue. On overhead crane and gantry crane motor brakes, the most common causes are undervoltage, incorrect rectifier selection, excessive voltage drop due to long cables, loose terminals, or an incorrect coil rating (110V vs 220V). A failing power supply [&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":[132,3],"tags":[133],"class_list":["post-2374","post","type-post","status-publish","format-standard","hentry","category-faq","category-blog","tag-overhead-or-gantry-crane"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/comments?post=2374"}],"version-history":[{"count":1,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2374\/revisions"}],"predecessor-version":[{"id":2391,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2374\/revisions\/2391"}],"wp:attachment":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/media?parent=2374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/categories?post=2374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/tags?post=2374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}