{"id":160,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/magnetic-pull\/"},"modified":"2026-07-03T09:54:32","modified_gmt":"2026-07-03T09:54:32","slug":"magnetic-pull","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/magnetic-pull\/","title":{"rendered":"Hvad er magnetisk tr\u00e6kkraft? Ubalanceret magnetisk kraft i motorer"},"content":{"rendered":"<h1>Forst\u00e5else af magnetisk tr\u00e6kkraft i elektriske motorer<\/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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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\/160?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>Magnetisk tr\u00e6k<\/strong> \u2014 ogs\u00e5 kaldet unbalanced magnetic pull eller UMP \u2014 er en netto radial elektromagnetisk kraft, der opst\u00e5r i elmotorer og generatorer, n\u00e5r luftspalten <a href=\"https:\/\/vibromera.eu\/da\/glossary\/air-gap\/\">luftspalte<\/a> mellem rotor og stator ikke er ensartet. N\u00e5r rotoren sidder excentrisk i statorboringen, bliver spalten mindre p\u00e5 den ene side og st\u00f8rre p\u00e5 den anden. Da den magnetiske tiltr\u00e6kning varierer omvendt med kvadratet af spalten, er kraften p\u00e5 siden med den smalle spalte langt st\u00e6rkere, hvilket skaber en nettokraft, der tr\u00e6kker rotoren mod den side. Resultatet er en kobling mellem mekanisk <a href=\"https:\/\/vibromera.eu\/da\/glossary\/eccentricity\/\">excentricitet<\/a> og en elektromagnetisk kraft, der, hvis den ikke holdes i skak, kan forst\u00e6rke sig selv.<\/p>\n<p>Magnetisk tr\u00e6k genererer typisk <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a> vibration ved netrelaterede frekvenser \u2014 mest karakteristisk ved dobbelt elektrisk netfrekvens (120 Hz ved 60 Hz-forsyninger, 100 Hz ved 50 Hz-forsyninger), n\u00e5r excentriciteten er statisk \u2014 kan afb\u00f8je rotoren betydeligt, accelererer <a href=\"https:\/\/vibromera.eu\/da\/glossary\/bearing-wear\/\">slid p\u00e5 lejer<\/a>, og i alvorlige tilf\u00e6lde ender det i katastrofal kontakt mellem rotor og stator. Det er afg\u00f8rende at forst\u00e5 dette, n\u00e5r man diagnosticerer <a href=\"https:\/\/vibromera.eu\/da\/glossary\/motor-defects\/\">motorfejl<\/a> korrekt.<\/p>\n<h2>1. Fysisk mekanisme<\/h2>\n<h3>Ensartet luftspalte (normale forhold)<\/h3>\n<ul>\n<li>Rotoren er centreret i statorens boring.<\/li>\n<li>Luftspalten er ensartet hele vejen rundt (typisk 0,3\u20131,5 mm).<\/li>\n<li>Magnetiske kr\u00e6fter p\u00e5 modsatte sider udligner hinanden og oph\u00e6ver hinanden.<\/li>\n<li>Den netto radiale kraft er n\u00e6sten nul.<\/li>\n<li>Minimal elektromagnetisk vibration.<\/li>\n<\/ul>\n<h3>Ekscentrisk luftspalte (UMP-tilstand)<\/h3>\n<p>N\u00e5r rotoren k\u00f8rer sk\u00e6vt:<\/p>\n<ol>\n<li><strong>Asymmetri i luftspalt:<\/strong> den ene side bliver smallere (f.eks. 0,5 mm), mens den modsatte side bliver bredere (f.eks. 1,0 mm).<\/li>\n<li><strong>Kvadratlov:<\/strong> magnetkraften \u221d 1\/spalte\u00b2, s\u00e5 kraften p\u00e5 den smalle side er meget st\u00f8rre.<\/li>\n<li><strong>Nettokraft:<\/strong> De uafbalancerede kr\u00e6fter oph\u00e6ver ikke l\u00e6ngere hinanden, hvilket resulterer i en samlet tr\u00e6kkraft mod den side, hvor mellemrummet er mindst.<\/li>\n<li><strong>St\u00f8rrelsesorden:<\/strong> kan n\u00e5 op p\u00e5 flere hundrede til flere tusinde pund, selv i motorer af moderat st\u00f8rrelse.<\/li>\n<li><strong>Retning:<\/strong> altid mod den side, hvor mellemrummet er mindst.<\/li>\n<\/ol>\n<h3>Hvorfor dobbelt s\u00e5 h\u00f8j som netfrekvensen?<\/h3>\n<p>En st\u00e6rk komponent ved 2\u00d7 netfrekvens er den klassiske signatur for UMP for\u00e5rsaget af en fast (statisk) excentricitet:<\/p>\n<ul>\n<li>En balanceret trefaset forsyning producerer et roterende magnetfelt med i det v\u00e6sentlige konstant st\u00f8rrelse \u2014 selve feltet pulserer ikke blot.<\/li>\n<li>Den radiale magnetiske (Maxwell) kraft i ethvert fast punkt p\u00e5 statorn er dog proportional med den lokale fluxt\u00e6thed i anden potens (B\u00b2); da fluxt\u00e6theden i dette punkt alternerer ved netfrekvensen, pulserer den lokale radiale kraft ved 2\u00d7 netfrekvens.<\/li>\n<li>Med et ensartet gab er disse kraftpulseringer symmetriske omkring boringen og oph\u00e6ver i vid udstr\u00e6kning hinanden; en statisk excentricitet bryder symmetrien og efterlader en netto pulserende kraft \u2014 og vibration \u2014 ved 2\u00d7f.<\/li>\n<li>60 Hz motor \u2192 120 Hz vibration; 50 Hz motor \u2192 100 Hz vibration.<\/li>\n<li>Dynamisk excentricitet (det smalle gab, der roterer med akslen) opf\u00f8rer sig anderledes: den viser sig hovedsageligt ved 1\u00d7 driftshastighed med <a href=\"https:\/\/vibromera.eu\/da\/glossary\/pole-pass-frequency\/\">frekvens for polpass<\/a> sideb\u00e5nd snarere end som en ren 2\u00d7f-top.<\/li>\n<\/ul>\n<p>Ingen enkelt top er i sig selv et bevis. Magnetisk m\u00e6tning, statorslotting og ubalance i forsyningssp\u00e6ndingen kan ogs\u00e5 h\u00e6ve netrelaterede komponenter, s\u00e5 en forh\u00f8jet 2\u00d7f-top b\u00f8r bekr\u00e6ftes med str\u00f8m-, belastet\/ubelastet- og luftgabskontrol, f\u00f8r UMP erkl\u00e6res.<\/p>\n<p>Dette placerer UMP helt klart i familien af <a href=\"https:\/\/vibromera.eu\/da\/glossary\/electrical-faults\/\">elektriske fejl<\/a>, i mods\u00e6tning til rent mekaniske kilder, selv n\u00e5r symptomet \u2014 en markant 2\u00d7-top \u2014 ved f\u00f8rste \u00f8jekast ligner det samme.<\/p>\n<h2>2. \u00c5rsager til ubalance i den magnetiske tiltr\u00e6kning<\/h2>\n<h3>Lejeslid<\/h3>\n<ul>\n<li>Den hyppigste \u00e5rsag til udvikling af UMP.<\/li>\n<li>Lejespillerummet g\u00f8r, at rotoren kan k\u00f8re sk\u00e6vt.<\/li>\n<li>Tyngdekraften tr\u00e6kker rotoren nedad, hvilket reducerer den nederste luftspalte.<\/li>\n<li>UMP tr\u00e6kker derefter rotoren endnu l\u00e6ngere ud af centrum.<\/li>\n<li>Positiv feedback: UMP fremskynder netop det lejeslid, der var \u00e5rsagen til problemet.<\/li>\n<\/ul>\n<h3>Fremstillingstolerancer<\/h3>\n<ul>\n<li><strong>Rotorens ekscentricitet:<\/strong> rotoren er ikke helt rund eller sidder ikke centreret p\u00e5 sin aksel.<\/li>\n<li><strong>Statorboringens ekscentricitet:<\/strong> boringen er ikke koncentrisk med monteringsfladerne.<\/li>\n<li><strong>Montagefejl:<\/strong> enderne er sk\u00e6ve, eller rotoren er sk\u00e6v under samlingen.<\/li>\n<li><strong>Tolerancestakning:<\/strong> en ophobning af sm\u00e5 fejl, der tilsammen udg\u00f8r en m\u00e6rkbar afvigelse.<\/li>\n<\/ul>\n<h3>Driftsm\u00e6ssige \u00e5rsager<\/h3>\n<ul>\n<li><strong>Termisk udvidelse:<\/strong> forskellig udvidelse, der forstyrrer spaltens ensartethed.<\/li>\n<li><strong>Rammeforvr\u00e6ngning:<\/strong> <a href=\"https:\/\/vibromera.eu\/da\/glossary\/soft-foot\/\">bl\u00f8d fod<\/a> eller at monteringssp\u00e6ndinger f\u00e5r rammen til at vride sig.<\/li>\n<li><strong>Akselafb\u00f8jning:<\/strong> belastning eller koblingskr\u00e6fter, der b\u00f8jer akslen.<\/li>\n<li><strong>Fundamentproblemer:<\/strong> s\u00e6tning eller forringelse, der forskyder motorens position.<\/li>\n<\/ul>\n<h2>3. Virkninger og konsekvenser<\/h2>\n<h3>Direkte effekter<\/h3>\n<ul>\n<li><strong>Radialkraft p\u00e5 rotoren:<\/strong> en konstant tr\u00e6kning mod den ene side.<\/li>\n<li><strong>Overbelastning af lejer:<\/strong> et leje b\u00e6rer den ekstra magnetiske belastning.<\/li>\n<li><strong>Vibration ved 2\u00d7f:<\/strong> en forst\u00e6rket elektromagnetisk komponent.<\/li>\n<li><strong>Akselafb\u00f8jning:<\/strong> Den magnetiske kraft b\u00f8jer akslen, hvilket forv\u00e6rrer ekscentriciteten.<\/li>\n<\/ul>\n<h3>Mekanisme for gradvis svigt<\/h3>\n<p>UMP kan udl\u00f8se en selvforst\u00e6rkende fejlcyklus:<\/p>\n<ol>\n<li>Indledende excentricitet (som f\u00f8lge af lejeslid eller fremstillingsfejl).<\/li>\n<li>Der opst\u00e5r en magnetisk tiltr\u00e6kning mod den side, hvor mellemrummet er mindst.<\/li>\n<li>Kraften afb\u00f8jer rotoren yderligere, hvilket indsn\u00e6vrer mellemrummet endnu mere.<\/li>\n<li>Jo mindre afstand, desto st\u00f8rre tr\u00e6kkraft.<\/li>\n<li>Lejeslidningen \u00f8ges p\u00e5 den belastede side.<\/li>\n<li>Ekscentriciteten og tr\u00e6kkraften stiger stadig.<\/li>\n<li>Eventuel rotor-stator-kontakt og katastrofalt svigt<\/li>\n<\/ol>\n<h3>F\u00f8lgeskader<\/h3>\n<ul>\n<li>Accelereret lejesvigt fra asymmetrisk belastning<\/li>\n<li>Mulig <a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-rub\/\">rotoren gnider mod statoren<\/a> hvilket beskadiger begge komponenter.<\/li>\n<li>B\u00f8jning af akslen eller en permanent <a href=\"https:\/\/vibromera.eu\/da\/glossary\/shaft-bow\/\">b\u00f8jning<\/a>.<\/li>\n<li>Skader p\u00e5 statorviklingen som f\u00f8lge af rotorst\u00f8d.<\/li>\n<li>Effektivitetstab som f\u00f8lge af en ikke-optimal luftspalte.<\/li>\n<\/ul>\n<h2>4. P\u00e5visning og diagnose<\/h2>\n<h3>Vibrationsm\u00f8nster<\/h3>\n<ul>\n<li><strong>Prim\u00e6r indikator:<\/strong> forh\u00f8jet 2\u00d7 netfrekvens (120 Hz eller 100 Hz).<\/li>\n<li><strong>Typisk m\u00f8nster:<\/strong> amplituden p\u00e5 2\u00d7f overstiger 30\u201350 % af 1\u00d7 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/running-speed\/\">L\u00f8behastighed<\/a> vibrationer.<\/li>\n<li><strong>Bekr\u00e6ftelse:<\/strong> 2\u00d7f-komponenten er ikke proportional med den mekaniske ubalance.<\/li>\n<li><strong>Uafh\u00e6ngighed af belastning:<\/strong> Amplituden p\u00e5 2\u00d7f forbliver relativt konstant uanset belastningen, i mods\u00e6tning til mekaniske kilder.<\/li>\n<\/ul>\n<p>For at kunne afl\u00e6se disse toppe korrekt kr\u00e6ves der f\u00f8rst og fremmest en pr\u00e6cis frekvensakse. En tydelig <a href=\"https:\/\/vibromera.eu\/da\/glossary\/spectrum\/\">spektrum<\/a>, l\u00f8st med en <a href=\"https:\/\/vibromera.eu\/da\/glossary\/fft\/\">FFT<\/a> og forankret til omdrejningshastigheden er det, der g\u00f8r det muligt at skelne en 2\u00d7 <em>linje<\/em>-frekvensspids fra en 2\u00d7 <em>drift<\/em>-hastighedstoppen \u2014 det absolut vigtigste kendetegn ved denne diagnose.<\/p>\n<h3>At skelne mellem UMP og andre 2\u00d7-kilder<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Kilde<\/th>\n<th>Karakteristika<\/th>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/vibromera.eu\/da\/glossary\/misalignment\/\">Fejljustering<\/a><\/td>\n<td>2\u00d7 driftshastighed (ikke 2\u00d7 netfrekvens); h\u00f8j aksial vibration<\/td>\n<\/tr>\n<tr>\n<td>Magnetisk tr\u00e6k<\/td>\n<td>2\u00d7 netfrekvens (120\/100 Hz); elektromagnetisk oprindelse<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/vibromera.eu\/da\/glossary\/stator-defects\/\">Statorfejl<\/a><\/td>\n<td>2\u00d7 netfrekvens; str\u00f8mubalance til stede<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/vibromera.eu\/da\/glossary\/frame-resonance\/\">Rammeresonans<\/a><\/td>\n<td>2 gange netfrekvensen; rammens vibrationer overstiger lejevibrationerne betydeligt<\/td>\n<\/tr>\n<\/table>\n<h3>Yderligere diagnostiske unders\u00f8gelser<\/h3>\n<h4>M\u00e5ling af luftspalte<\/h4>\n<ul>\n<li>M\u00e5l luftspalten flere steder rundt om omkredsen (kr\u00e6ver, at motoren skilles ad).<\/li>\n<li>Ekscentricitet st\u00f8rre end 10 % af den gennemsnitlige luftspalte tyder p\u00e5 et problem.<\/li>\n<li>Not\u00e9r de mindste og st\u00f8rste v\u00e6rdier for mellemrummet.<\/li>\n<\/ul>\n<h4>Str\u00f8manalyse<\/h4>\n<ul>\n<li>Kontroller, om fasestr\u00f8mmene er afbalancerede.<\/li>\n<li>Der kan forekomme en ubalance i str\u00f8mforsyningen i forbindelse med UMP.<\/li>\n<li>Str\u00f8mspektret viser en 2\u00d7 netfrekvenskomponent.<\/li>\n<\/ul>\n<h4>Tomgangstest<\/h4>\n<ul>\n<li>K\u00f8r motoren frakoblet uden belastning.<\/li>\n<li>Hvis 2\u00d7f-vibrationen forbliver h\u00f8j, er \u00e5rsagen elektromagnetisk (UMP eller en statorfejl).<\/li>\n<li>Hvis den falder kraftigt, skyldes det en mekanisk fejljustering.<\/li>\n<\/ul>\n<p>Denne tomgangstest er den afg\u00f8rende kontrol i praksis: Den skelner klart mellem elektromagnetiske og mekaniske \u00e5rsager og b\u00f8r udf\u00f8res, inden der foretages nogen form for indgribende adskillelse. En <a href=\"https:\/\/vibromera.eu\/da\/calculators\/motor-electrical-frequencies\/\">frekvensberegner for elektriske motorfejl<\/a> hj\u00e6lper med at fastsl\u00e5, hvor 2\u00d7f og relaterede komponenter skal placeres ved en given forsyningssp\u00e6nding og antal poler.<\/p>\n<h2>5. Kvantificering af den magnetiske tiltr\u00e6kningskraft<\/h2>\n<h3>Omtrentlig sammenh\u00e6ng<\/h3>\n<p>UMP-kraften kan beregnes ud fra en simpel proportionalitetssammenh\u00e6ng:<\/p>\n<blockquote><p><strong>F \u221d (ekscentricitet \/ luftspalte) \u00d7 motoreffekt.<\/strong> Kraften vokser omtrent line\u00e6rt med ekscentriciteten, stiger kraftigt, n\u00e5r luftspalten bliver mindre, og skalerer op med motorst\u00f8rrelsen.<\/p><\/blockquote>\n<h3>Typiske st\u00f8rrelsesordener<\/h3>\n<ul>\n<li><strong>10 HP motor, 10% ekscentricitet:<\/strong> ~50\u2013100 lbf.<\/li>\n<li><strong>100 HP motor, 20% ekscentricitet:<\/strong> ~500\u20131.000 lbf.<\/li>\n<li><strong>1000 HP motor, 30% ekscentricitet:<\/strong> ~5.000\u201310.000 lbf.<\/li>\n<li><strong>Indvirkning:<\/strong> Kr\u00e6fter af denne st\u00f8rrelsesorden belaster lejerne kraftigt og kan synligt b\u00f8je akslerne.<\/li>\n<\/ul>\n<h2>6. Korrektionsmetoder<\/h2>\n<h3>Ved lejefor\u00e5rsaget excentricitet<\/h3>\n<ul>\n<li>Udskift slidte lejer for at genoprette korrekt rotorcentrering<\/li>\n<li>Brug lejer med mindre tolerance, hvis excentriciteten opst\u00e5r igen.<\/li>\n<li>Kontroller, at det valgte leje er egnet til motorbelastninger, herunder UMP.<\/li>\n<li>Kontroller, at lejet sidder korrekt p\u00e5 akslen og i endeh\u00e6tterne.<\/li>\n<\/ul>\n<h3>Ved fremstillingsbetinget ekscentricitet<\/h3>\n<ul>\n<li><strong>Mindre (&lt; 10 %):<\/strong> godkende og kontrollere, om vibrationerne er acceptable.<\/li>\n<li><strong>Moderat (10\u201325 %):<\/strong> Overvej at udbore statoren eller bearbejde rotoren.<\/li>\n<li><strong>Alvorlig (&gt; 25 %):<\/strong> udskiftning af motor eller st\u00f8rre ombygning.<\/li>\n<li><strong>Garanti:<\/strong> Produktionsexcentricitet kan v\u00e6re et garantikrav p\u00e5 nye motorer<\/li>\n<\/ul>\n<h3>Ved monterings- og installationsproblemer<\/h3>\n<ul>\n<li>Kontroller, at endeh\u00e6tten sidder korrekt, og at boltene er sp\u00e6ndt korrekt.<\/li>\n<li>Ret eventuelle <a href=\"https:\/\/vibromera.eu\/da\/glossary\/soft-foot\/\">soft-foot<\/a> tilstand.<\/li>\n<li>S\u00f8rg for, at rammen ikke bliver sk\u00e6v p\u00e5 grund af monteringssp\u00e6ndinger.<\/li>\n<li>Kontroller for r\u00f8rsp\u00e6nding eller koblingskr\u00e6fter, der tr\u00e6kker motoren ud af position<\/li>\n<\/ul>\n<h2>7. Forebyggelsesstrategier<\/h2>\n<h3>Design og udv\u00e6lgelse<\/h3>\n<ul>\n<li>Angiv sn\u00e6vre tolerancer for luftspalten ved kritiske anvendelser.<\/li>\n<li>V\u00e6lg kvalitetsmotorer fra anerkendte producenter.<\/li>\n<li>St\u00f8rre luftspalter reducerer UMP-kraften (dog p\u00e5 bekostning af effektiviteten).<\/li>\n<li>Overvej magnetiske lejedesign til ekstreme anvendelser<\/li>\n<\/ul>\n<h3>Installation<\/h3>\n<ul>\n<li>S\u00f8rg for at justere det n\u00f8je under monteringen.<\/li>\n<li>Fjern soft foot f\u00f8r den endelige boltsp\u00e6nding.<\/li>\n<li>Kontroller rotorens aksiale placering og sl\u00f8r.<\/li>\n<li>S\u00f8rg for, at endeskjoldene er korrekt oprettet og tilsp\u00e6ndt.<\/li>\n<\/ul>\n<h3>Vedligeholdelse<\/h3>\n<ul>\n<li>Udskift lejerne, inden sliddet bliver for stort.<\/li>\n<li>Overv\u00e5g udviklingen i 2\u00d7 netfrekvensvibrationerne over tid.<\/li>\n<li>Verific\u00e9r <a href=\"https:\/\/vibromera.eu\/da\/glossary\/afbalancering\/\">balancering<\/a> og justering med j\u00e6vne mellemrum.<\/li>\n<li>Hold motoren ren for at undg\u00e5 tilstopning af k\u00f8lesystemet og den termiske deformation, det medf\u00f8rer.<\/li>\n<\/ul>\n<h2>8. S\u00e6rlige forhold<\/h2>\n<h3>Store motorer<\/h3>\n<ul>\n<li>UMP-kr\u00e6fterne kan v\u00e6re enorme \u2013 der er tale om kr\u00e6fter i ton-klassen.<\/li>\n<li>Ved valg af lejer skal der tages h\u00f8jde for UMP-belastninger.<\/li>\n<li>Beregninger af akselafb\u00f8jning b\u00f8r omfatte UMP.<\/li>\n<li>Overv\u00e5gning af luftspalten kan v\u00e6re indbygget i store, kritiske motorer.<\/li>\n<\/ul>\n<h3>H\u00f8jhastighedsmotorer<\/h3>\n<ul>\n<li><a href=\"https:\/\/vibromera.eu\/da\/glossary\/centrifugal-force\/\">Centrifugalkr\u00e6fter<\/a> kombiner med UMP.<\/li>\n<li>Der er risiko for ustabilitet, hvis UMP er for stor.<\/li>\n<li>Strenge tolerancer for luftspalten er afg\u00f8rende.<\/li>\n<\/ul>\n<h3>Vertikale motorer<\/h3>\n<ul>\n<li>Tyngdekraften centrerer ikke rotoren, som det er tilf\u00e6ldet i vandrette motorer.<\/li>\n<li>UMP kan tr\u00e6kke rotoren mod begge sider.<\/li>\n<li>Den <a href=\"https:\/\/vibromera.eu\/da\/glossary\/thrust-bearing\/\">trykleje<\/a> skal kunne b\u00e6re rotorens v\u00e6gt samt eventuelle aksiale UMP-komponenter.<\/li>\n<\/ul>\n<h2>9. Forholdet til andre motoriske problemer<\/h2>\n<h3>UMP og rotorens excentricitet<\/h3>\n<ul>\n<li><a href=\"https:\/\/vibromera.eu\/da\/glossary\/rotor-eccentricity\/\">Excentricitet<\/a> for\u00e5rsager UMP.<\/li>\n<li>UMP kan forv\u00e6rre den excentriske belastning (positiv feedback).<\/li>\n<li>Begge skaber vibrationer, men ved forskellige frekvenser (1\u00d7 kontra 2\u00d7f).<\/li>\n<\/ul>\n<h3>UMP og statorfejl<\/h3>\n<ul>\n<li>Begge genererer vibrationer med dobbelt linjefrekvens.<\/li>\n<li>Statorfejl medf\u00f8rer desuden str\u00f8mubalance.<\/li>\n<li>UMP skyldes excentricitet uden str\u00f8mubalance.<\/li>\n<li>De to kan forekomme samtidigt \u2013 en statorfejl og excentricitet.<\/li>\n<\/ul>\n<h3>UMP og lejets levetid<\/h3>\n<ul>\n<li>UMP \u00f8ger de radiale belastninger p\u00e5 lejerne.<\/li>\n<li>Det forkorter lejets levetid (levetid \u221d 1\/(belastning\u00b3)).<\/li>\n<li>Det medf\u00f8rer asymmetrisk lejeslitage.<\/li>\n<li>Det ene leje kan g\u00e5 i stykker f\u00f8r tid, mens det andet stadig fungerer tilfredsstillende.<\/li>\n<\/ul>\n<h2>10. Anvendelse i praksis<\/h2>\n<p>Magnetisk tiltr\u00e6kning udg\u00f8r en vigtig kobling mellem den mekaniske og den elektromagnetiske verden inde i en motor. En korrekt diagnose foruds\u00e6tter, at man erkender UMP som kilde til 2\u00d7 netfrekvensvibrationer, forst\u00e5r sammenh\u00e6ngen med luftspaltens excentricitet og indser, at dette kan f\u00f8re til gradvis svigt som f\u00f8lge af overbelastning af lejerne. I praksis er arbejdsgangen enkel: Lav en tendensanalyse af 2\u00d7f-komponenten, udf\u00f8r en tomgangstest for at bekr\u00e6fte en elektromagnetisk oprindelse, og udeluk de mekaniske ligheder. En b\u00e6rbar tokanalsanalysator s\u00e5som <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> captures the <a href=\"https:\/\/vibromera.eu\/da\/glossary\/amplitude\/\">amplitude<\/a> og <a href=\"https:\/\/vibromera.eu\/da\/glossary\/phase\/\">fase<\/a> m\u00e5ling af komponenterne ved omdrejningshastighed og dobbelt netfrekvens p\u00e5 den samlede motor ved driftshastighed, hvilket hj\u00e6lper ingeni\u00f8ren med at skelne \u00e6gte UMP fra en 1\u00d7 mekanisk <a href=\"https:\/\/vibromera.eu\/da\/glossary\/unbalance\/\">ubalance<\/a> det kr\u00e6ver blot <a href=\"https:\/\/vibromera.eu\/da\/glossary\/feltbalancering\/\">feltafbalancering<\/a> \u2014 og dermed s\u00e6tte ind over for den egentlige \u00e5rsag i stedet for at bek\u00e6mpe et symptom.<\/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 magnetisk tr\u00e6kkraft (UMP), ubalancerede radiale elektromagnetiske kr\u00e6fter i motorer fra luftgabets excentricitet, der for\u00e5rsager vibrationer ved 2X netfrekvens og rotorudb\u00f8jning.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-160","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/160","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\/160\/revisions"}],"predecessor-version":[{"id":102157,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/160\/revisions\/102157"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}