{"id":63,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/broken-rotor-bars\/"},"modified":"2026-07-03T09:57:04","modified_gmt":"2026-07-03T09:57:04","slug":"broken-rotor-bars","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/broken-rotor-bars\/","title":{"rendered":"Hvad er kn\u00e6kkede rotorst\u00e6nger? Fejl i egernburmotor"},"content":{"rendered":"<h1>Forst\u00e5else af \u00f8delagte rotorst\u00e6nger<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/balanset-1\/\" title=\"B\u00e6rbart afbalanceringsapparat og vibrationsanalysator Balanset-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A komplet s\u00e6t med b\u00e6rbar afbalanceringsenhed og vibrationsanalysator\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/da\/product\/balanset-1\/\" title=\"B\u00e6rbart afbalanceringsapparat og vibrationsanalysator Balanset-1A\">B\u00e6rbart afbalanceringsapparat og vibrationsanalysator Balanset-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,975.00<\/span> + moms (hvis relevant)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"L\u00e6g i kurv: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A vibrationssensor i n\u00e6rbillede\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/da\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">Vibrationssensor<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>90.00<\/span> + moms (hvis relevant)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"L\u00e6g i kurv: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (laser-tachometer)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Optisk sensor (laser-tachometer)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/da\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (laser-tachometer)\">Optisk sensor (laser-tachometer)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>124.00<\/span> + moms (hvis relevant)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"L\u00e6g i kurv: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/balanset-4\/\" title=\"Balanset-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Vibromera rotorbalanceringss\u00e6t: b\u00e6retaske, flerkanals signalbehandler, h\u00e5ndholdt analysator, magnetisk base, vibrationssensorer og spiralkabler.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/da\/product\/balanset-4\/\" title=\"Balanset-4\">Balanset-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>6,803.00<\/span> + moms (hvis relevant)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"L\u00e6g i kurv: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/magnet-stand\/\" title=\"Magnetisk stativ Insize-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Magnetbase.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/da\/product\/magnet-stand\/\" title=\"Magnetisk stativ Insize-60-kgf\">Magnetisk stativ Insize-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>46.00<\/span> + moms (hvis relevant)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"L\u00e6g i kurv: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/reflective-tape\/\" title=\"Reflekterende tape\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Reflekterende tape\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/da\/product\/reflective-tape\/\" title=\"Reflekterende tape\">Reflekterende tape<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>10.00<\/span> + moms (hvis relevant)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=2329\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2329\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2329\" data-product_sku=\"rt-1\" aria-label=\"L\u00e6g i kurv: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2329\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/dynamic-balancer-balanset-1a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/da\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balancer &quot;Balanset-1A&quot; OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A-s\u00e6t med interface-enhed, sensorer, omdrejningst\u00e6ller og tilbeh\u00f8r\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1024x683.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1536x1024.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-2048x1366.webp 2048w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-e1732998877834.webp 708w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/da\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balancer &quot;Balanset-1A&quot; OEM\">Dynamisk balancer \"Balanset-1A\" OEM<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,735.00<\/span> + moms (hvis relevant)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=4193\" data-quantity=\"1\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/da\/wp-json\/wp\/v2\/glossary\/63?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"L\u00e6g i kurv: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p><strong>\u00d8delagte rotorst\u00e6nger<\/strong> er fuldst\u00e6ndige brud p\u00e5 lederst\u00e6ngerne i en induktionsmotors kortsluttede rotor. Tilstanden svarer i det v\u00e6sentlige til en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-bar-defects\/\">defekt i rotorstangen<\/a>, men udtrykket henviser til et fuldst\u00e6ndigt brud snarere end en revne eller en samling med h\u00f8j modstand. N\u00e5r en eller flere st\u00e6nger br\u00e6kker over, kan str\u00f8mmen ikke l\u00e6ngere l\u00f8be igennem dem, og den deraf f\u00f8lgende elektromagnetiske asymmetri skaber en karakteristisk <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a> og str\u00f8msignaturer \u2014 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/sidebands\/\">sideb\u00e5nd<\/a> fordelt p\u00e5 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/pole-pass-frequency\/\">frekvens for polpass<\/a> (antallet af poler \u00d7 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/slip-frequency\/\">slipfrekvens<\/a>) around the <a href=\"https:\/\/vibromera.eu\/da\/glossary\/running-speed\/\">l\u00f8behastighed<\/a>.<\/p>\n<p>Brudte st\u00e6nger er s\u00e6rligt snigende, fordi de svigter i en k\u00e6dereaktion. En enkelt brudt stang p\u00e5f\u00f8rer de tilst\u00f8dende st\u00e6nger ekstra str\u00f8m og belastning, hvilket f\u00e5r dem til at svigte efterh\u00e5nden. Opdages fejlen tidligt \u2013 alts\u00e5 n\u00e5r der kun er tale om en enkelt brudt stang \u2013 kan motoren k\u00f8re i flere m\u00e5neder under n\u00f8je overv\u00e5gning; overses fejlen, kan den udvikle sig til flere brudte st\u00e6nger og en katastrofal rotorsvigt, der kr\u00e6ver udskiftning.<\/p>\n<h2>1. Hvordan rotorst\u00e6nger kn\u00e6kker<\/h2>\n<h3>Termisk tr\u00e6thed (mest almindelig)<\/h3>\n<p>Gentagne opvarmnings- og afk\u00f8lingscyklusser er den prim\u00e6re \u00e5rsag, og det er v\u00e6rd at f\u00f8lge mekanismen trin for trin:<\/p>\n<ul>\n<li><strong>Startstr\u00f8m:<\/strong> Ved opstart f\u00f8rer rotoren 5\u20137 gange den normale str\u00f8m i tilstanden med fastl\u00e5st rotor.<\/li>\n<li><strong>Termisk ekspansion:<\/strong> Aluminiumsst\u00e6ngerne udvider sig kraftigt med en udvidelseskoefficient p\u00e5 ca. 23 \u00b5m\/m\/\u00b0C.<\/li>\n<li><strong>Begr\u00e6nsning:<\/strong> Jernkernen udvider sig langt mindre (ca. 12 \u00b5m\/m\/\u00b0C), hvilket holder st\u00e6ngerne p\u00e5 plads.<\/li>\n<li><strong>Stress:<\/strong> Denne forskel i udvidelse medf\u00f8rer store termiske sp\u00e6ndinger i st\u00e6ngerne.<\/li>\n<li><strong>Tr\u00e6thed:<\/strong> gentagne startcyklusser medf\u00f8rer lavcyklus- <a href=\"https:\/\/vibromera.eu\/da\/glossary\/fatigue\/\">tr\u00e6thed<\/a>.<\/li>\n<li><strong>Brudindledning:<\/strong> Revner opst\u00e5r som regel ved samlingen mellem stangen og enderingen, hvor belastningen er st\u00f8rst.<\/li>\n<\/ul>\n<h3>Mekanisk stress<\/h3>\n<ul>\n<li><a href=\"https:\/\/vibromera.eu\/da\/glossary\/centrifugal-force\/\">Centrifugalkr\u00e6fter<\/a> at high speed.<\/li>\n<li>Elektromagnetiske kr\u00e6fter under k\u00f8rsel og start.<\/li>\n<li>Vibrationer, der overf\u00f8res fra eksterne kilder.<\/li>\n<li>St\u00f8dbelastning ved opstart eller pludselige belastnings\u00e6ndringer.<\/li>\n<\/ul>\n<h3>Produktionsfejl<\/h3>\n<ul>\n<li><strong>Por\u00f8sitet:<\/strong> hulrum i st\u00f8bte aluminiumsrotorer.<\/li>\n<li><strong>D\u00e5rlig binding:<\/strong> utilstr\u00e6kkelig vedh\u00e6ftning mellem stang og kerne.<\/li>\n<li><strong>Materialeindeslutninger:<\/strong> forurenende stoffer, der er fanget i st\u00f8begodset.<\/li>\n<li><strong>Svage samlinger mellem stang og endering:<\/strong> d\u00e5rlige forbindelser mellem stang og endering.<\/li>\n<\/ul>\n<h3>Driftsforhold<\/h3>\n<ul>\n<li><strong>Hyppige opstarter:<\/strong> Hver opstart udg\u00f8r en belastning af b\u00e5de termisk og mekanisk art.<\/li>\n<li><strong>Belastninger med h\u00f8j inerti:<\/strong> Lange accelerationstider forl\u00e6nger belastningen p\u00e5 stangen.<\/li>\n<li><strong>Reverseringsdrift:<\/strong> modstr\u00f8msbremsning skaber ekstreme str\u00f8mme.<\/li>\n<li><strong>Single-phasing:<\/strong> k\u00f8rsel med en fase ude af drift medf\u00f8rer overbelastning af de resterende rotorst\u00e6nger.<\/li>\n<\/ul>\n<h2>2. Den karakteristiske sideb\u00e5ndssignatur<\/h2>\n<h3>Hvorfor sideb\u00e5nd opst\u00e5r<\/h3>\n<p>Det karakteristiske diagnostiske m\u00f8nster opst\u00e5r gennem en tydelig \u00e5rsag-virkningssammenh\u00e6ng:<\/p>\n<ol>\n<li>En brudt stang kan ikke lede str\u00f8m, hvilket skaber elektrisk asymmetri i rotoren.<\/li>\n<li>Denne asymmetri halter efter det roterende felt med slipfrekvensen f<sub>s<\/sub> - forskellen mellem synkron hastighed og rotorhastighed, i Hz.<\/li>\n<li>Den skaber en momentpulsation ved polpassagefrekvensen F<sub>P<\/sub> = antal poler \u00d7 f<sub>s<\/sub> \u2014 equivalently twice the per-unit slip times the line frequency (2\u00b7s\u00b7f<sub>linje<\/sub>).<\/li>\n<li>Momentpulseringen modulerer den 1\u00d7-vibration, der skyldes almindelig mekanisk ubalance.<\/li>\n<li>Resultatet er sideb\u00e5nd med afstand svarende til drifthastighed \u00b1 polpassagefrekvensintervaller.<\/li>\n<\/ol>\n<h3>Vibrationsm\u00f8nster<\/h3>\n<ul>\n<li><strong>Central top:<\/strong> 1\u00d7 l\u00f8behastighed (f<sub>r<\/sub>).<\/li>\n<li><strong>Nedre sideb\u00e5nd:<\/strong> f<sub>r<\/sub> \u2212 F<sub>P<\/sub> (where F<sub>P<\/sub> = poles \u00d7 f<sub>s<\/sub> er polpassagefrekvensen).<\/li>\n<li><strong>\u00d8vre sideb\u00e5nd:<\/strong> f<sub>r<\/sub> + F<sub>P<\/sub>.<\/li>\n<li><strong>Flere sideb\u00e5nd:<\/strong> f<sub>r<\/sub> \u00b1 2F<sub>P<\/sub>, f<sub>r<\/sub> \u00b1 3F<sub>P<\/sub> i takt med at alvorligheden \u00f8ges.<\/li>\n<li><strong>Symmetri:<\/strong> sideb\u00e5ndene ligger symmetrisk omkring 1\u00d7-toppen.<\/li>\n<\/ul>\n<h3>Worked Example<\/h3>\n<p>En 4-polet 60 Hz-motor ved fuld belastning:<\/p>\n<ul>\n<li>Synkronhastighed: 1800 omdrejninger i minuttet.<\/li>\n<li>Faktisk hastighed: 1750 omdrejninger pr. minut (29,17 Hz).<\/li>\n<li>Slip: 50 RPM, s\u00e5 slipfrekvensen f<sub>s<\/sub> = 50\/60 = 0.833 Hz.<\/li>\n<li>Polpassagefrekvens: F<sub>P<\/sub> = 4 poles \u00d7 0.833 Hz = 3.33 Hz.<\/li>\n<li><strong>Vibrationstoppe ved:<\/strong> 25.8 Hz, 29.17 Hz og 32.5 Hz.<\/li>\n<li>En br\u00e6kket stang bekr\u00e6ftes af de symmetriske sideb\u00e5nd ved \u00b13.33 Hz.<\/li>\n<\/ul>\n<p>Da glidefrekvensen udg\u00f8r selve grundlaget for dette m\u00f8nster, er det en god id\u00e9 at beregne den n\u00f8jagtigt for den p\u00e5g\u00e6ldende motor; den <a href=\"https:\/\/vibromera.eu\/da\/calculators\/motor-slip-calculator\/\">Motorslip og faktisk omdrejningstalberegner<\/a> g\u00f8r dette direkte ud fra oplysningerne p\u00e5 typeskiltet.<\/p>\n<h2>3. Analyse af str\u00f8msignaturer (MCSA)<\/h2>\n<p>En analyse af motorstr\u00f8mmen afsl\u00f8rer et m\u00f8nster, der ligner det omkring <a href=\"https:\/\/vibromera.eu\/da\/glossary\/electrical-frequency\/\">netfrekvens<\/a>:<\/p>\n<ul>\n<li><strong>Central top:<\/strong> netfrekvens (50 eller 60 Hz).<\/li>\n<li><strong>Sideb\u00e5nd:<\/strong> f<sub>linje<\/sub> \u00b1 2\u00b7s\u00b7f<sub>linje<\/sub>, hvor s er slip i per unit - de samme \u00b1F<sub>P<\/sub> spacing as in vibration, because 2\u00b7s\u00b7f<sub>linje<\/sub> er lig med polpassagefrekvensen.<\/li>\n<li><strong>Eksempel:<\/strong> the 4-pole motor above (s = 50\/1800 \u2248 2.8%) shows sidebands at 60 \u00b1 3.33 Hz \u2014 that is, at 56.7 Hz and 63.3 Hz.<\/li>\n<li><strong>Fordel:<\/strong> ikke-invasiv og velegnet til kontinuerlig overv\u00e5gning.<\/li>\n<li><strong>F\u00f8lsomhed:<\/strong> opdager ofte brud p\u00e5 st\u00e6ngerne f\u00f8r der opst\u00e5r vibrationer. Den <a href=\"https:\/\/vibromera.eu\/da\/calculators\/motor-electrical-frequencies\/\">Motor elektrisk defektfrekvensberegner<\/a> forudsiger netop disse str\u00f8msideb\u00e5nd.<\/li>\n<\/ul>\n<h2>4. Udviklingsfaser<\/h2>\n<h3>En enkelt kn\u00e6kket stang<\/h3>\n<ul>\n<li>Der opst\u00e5r sm\u00e5 sideb\u00e5nd, der udg\u00f8r ca. 20\u201340 % af 1\u00d7-toppen.<\/li>\n<li>Let drejningsmomentpulsering, som ofte ikke kan m\u00e6rkes.<\/li>\n<li>Motorens ydeevne er n\u00e6sten normal.<\/li>\n<li>Motoren kan k\u00f8re i flere m\u00e5neder under overv\u00e5gning.<\/li>\n<li>Der b\u00f8r dog alligevel l\u00e6gges planer for udskiftning.<\/li>\n<\/ul>\n<h3>Flere tilst\u00f8dende brudte st\u00e6nger<\/h3>\n<ul>\n<li>Kraftige sideb\u00e5nd, der udg\u00f8r mere end 50 % af 1\u00d7-toppen.<\/li>\n<li>M\u00e6rkbar drejningsmomentpulsering.<\/li>\n<li>\u00d8get glidning og temperatur.<\/li>\n<li>Udviklingen accelererer, efterh\u00e5nden som de tilst\u00f8dende st\u00e6nger overophedes.<\/li>\n<li>Udskiftningen er blevet presserende \u2014 det er kun et sp\u00f8rgsm\u00e5l om uger.<\/li>\n<\/ul>\n<h3>Alvorlig tilstand<\/h3>\n<ul>\n<li>Sideb\u00e5ndene kan overstige 1\u00d7 spidsamplituden.<\/li>\n<li>Kraftige drejningsmomentudsving, der p\u00e5virker det drevne udstyr.<\/li>\n<li>St\u00e6rke vibrationer og h\u00f8je temperaturer.<\/li>\n<li>Risiko for svigt i enderingen eller total svigt af rotoren.<\/li>\n<li>Der skal straks udskiftes.<\/li>\n<\/ul>\n<h2>5. Detektion i felten<\/h2>\n<h3>Vibrationsanalyse<\/h3>\n<p>Den afg\u00f8rende udfordring er opl\u00f8sningsevnen: sideb\u00e5ndene ligger kun f\u00e5 hertz fra 1\u00d7-toppen (ved polpassagefrekvensen, typisk 1-4 Hz), s\u00e5 analysatoren skal kunne adskille dem tydeligt.<\/p>\n<ul>\n<li>Brug et h\u00f8jopl\u00f8seligt <a href=\"https:\/\/vibromera.eu\/da\/glossary\/fft\/\">FFT<\/a> \u2014 bedre end 0,2 Hz opl\u00f8sning \u2014 for at kunne opl\u00f8se sideb\u00e5ndene; den <a href=\"https:\/\/vibromera.eu\/da\/calculators\/fft-resolution-calculator\/\">FFT-opl\u00f8sningsberegner<\/a> hj\u00e6lper dig med at v\u00e6lge antal linjer og sp\u00e6ndvidde.<\/li>\n<li>Test motoren under belastning, da sideb\u00e5ndene bliver st\u00e6rkere, jo st\u00f8rre str\u00f8mmen er.<\/li>\n<li>Beregn den forventede slip- og polpassagefrekvens for motoren p\u00e5 forh\u00e5nd.<\/li>\n<li>Search the <a href=\"https:\/\/vibromera.eu\/da\/glossary\/spectrum\/\">spektrum<\/a> efter symmetriske sideb\u00e5nd ved \u00b1F<sub>P<\/sub> omkring 1\u00d7-toppen.<\/li>\n<li>Vis sideb\u00e5ndets amplitude over tid.<\/li>\n<\/ul>\n<p>Denne opgave kan sagtens udf\u00f8res med et b\u00e6rbart instrument. En tokanalsanalysator som f.eks. <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> captures the vibration spectrum at the motor bearing while its optical laser tachometer reads true shaft speed, letting you fix the precise 1\u00d7 frequency, compute the slip, and look for the pole-pass-spaced sidebands that confirm broken bars \u2014 all with the motor running under its normal load. Because the same instrument also measures 1\u00d7 amplitude and phase, it cleanly separates a genuine rotor-bar signature from a simple <a href=\"https:\/\/vibromera.eu\/da\/glossary\/running-speed\/\">L\u00f8behastighed<\/a> ubalance, der kr\u00e6ver afbalancering frem for udskiftning af rotoren.<\/p>\n<h3>MCSA-testning<\/h3>\n<ul>\n<li>Fastg\u00f8r str\u00f8msonderne til motorens ledninger.<\/li>\n<li>Hent den aktuelle b\u00f8lgeform og beregn dens FFT.<\/li>\n<li>Se efter sideb\u00e5nd ved f<sub>linje<\/sub> \u00b1 2\u00b7s\u00b7f<sub>linje<\/sub> (that is, f<sub>linje<\/sub> \u00b1 F<sub>P<\/sub>).<\/li>\n<li>Sammenlign med en referencev\u00e6rdi for en sund motor.<\/li>\n<li>Dette kan v\u00e6re et tegn p\u00e5 et problem, inden vibrationssymptomerne bliver tydelige.<\/li>\n<\/ul>\n<h2>6. Afhj\u00e6lpende foranstaltninger<\/h2>\n<h3>\u00d8jeblikkelig respons<\/h3>\n<ul>\n<li>\u00d8g overv\u00e5gningshyppigheden \u2014 f\u00f8rst hver m\u00e5ned, derefter hver uge og til sidst hver dag.<\/li>\n<li>F\u00f8lg udviklingen i sideb\u00e5ndsamplituden gennem <a href=\"https:\/\/vibromera.eu\/da\/glossary\/trend-analysis\/\">trendanalyse<\/a>.<\/li>\n<li>Bestil en reservemotor, eller planl\u00e6g udskiftningen af rotoren.<\/li>\n<li>Reducer arbejdscyklussen, hvis det er muligt, og begr\u00e6ns antallet af opstarter.<\/li>\n<li>Dokument\u00e9r forl\u00f8bet med henblik p\u00e5 fejlanalyse.<\/li>\n<\/ul>\n<h3>Reparationsmuligheder<\/h3>\n<ul>\n<li><strong>Udskiftning af rotor:<\/strong> det mest p\u00e5lidelige valg til store motorer (over 100 hk).<\/li>\n<li><strong>Omsmeltning af rotor:<\/strong> specialv\u00e6rksteder kan omst\u00f8be aluminiumsrotorer.<\/li>\n<li><strong>Udskiftning af motor:<\/strong> er ofte den mest \u00f8konomiske l\u00f8sning for sm\u00e5 motorer (under 50 hk).<\/li>\n<li><strong>Unders\u00f8gelse af \u00e5rsagen:<\/strong> fastsl\u00e5 \u00e5rsagen til, at st\u00e6ngerne br\u00f8d, for at forhindre, at det sker igen.<\/li>\n<\/ul>\n<h3>Forebyggelse<\/h3>\n<ul>\n<li>Brug bl\u00f8dstartere eller frekvensomformere for at reducere startstr\u00f8mmen og den termiske belastning.<\/li>\n<li>Begr\u00e6ns startfrekvensen ved belastninger med h\u00f8j inerti.<\/li>\n<li>V\u00e6lg motorer, der er dimensioneret til den faktiske driftscyklus \u2014 modeller med hyppig start til drift med mange start-stop-cyklusser.<\/li>\n<li>S\u00f8rg for tilstr\u00e6kkelig ventilation og afk\u00f8ling af motoren.<\/li>\n<li>Beskyt mod enfaset drift.<\/li>\n<\/ul>\n<p>Brudte rotorst\u00e6nger udg\u00f8r kun omkring 10-15 % af <a href=\"https:\/\/vibromera.eu\/da\/glossary\/motor-defects\/\">motor failures<\/a>, men de efterlader en umiskendelig sideb\u00e5ndssignatur ved polpassage, som underst\u00f8tter p\u00e5lidelig tidlig detektion ved vibrations- eller str\u00f8manalyse. Forst\u00e5else af termisk udmattelsesmekanisme, genkendelse af det karakteristiske sideb\u00e5ndsm\u00f8nster og indbygning af kontrollerne i et <a href=\"https:\/\/vibromera.eu\/da\/glossary\/condition-monitoring\/\">tilstandsoverv\u00e5gning<\/a> program g\u00f8r det muligt at udskifte en motor efter en fast plan - inden en enkelt brudt stang udl\u00f8ser flere stangbrud og l\u00e6ngerevarende uplanlagte driftsstop.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/da\/glossary\/\">\u2190 Tilbage til hovedindekset<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e6r om kn\u00e6kkede rotorst\u00e6nger i induktionsmotorer, kn\u00e6kkede lederst\u00e6nger, der skaber slipfrekvenssideb\u00e5nd, momentpulsering og progressiv svigt, hvis det ikke opdages tidligt.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-63","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/63","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/63\/revisions"}],"predecessor-version":[{"id":102161,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/63\/revisions\/102161"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=63"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=63"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=63"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}