{"id":20618,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/air-gap\/"},"modified":"2026-07-03T09:54:53","modified_gmt":"2026-07-03T09:54:53","slug":"air-gap","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/air-gap\/","title":{"rendered":"Hvad er luftgab i elektriske motorer? Kritisk frigang"},"content":{"rendered":"<h1>Forst\u00e5else af luftgab i elmotorer<\/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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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\/20618?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>Den <strong>luftspalte<\/strong> er det smalle radiale mellemrum mellem rotorens ydre overflade og statorens indre hul i en elektrisk motor eller generator. Typisk kun <strong>0.3\u20132.0 mm<\/strong> (0,012\u20130,080 tommer) bredt; dette tynde ringformede mellemrum udg\u00f8r den magnetiske bro, hvorigennem elektromagnetisk energi overf\u00f8res mellem de station\u00e6re viklinger og det roterende element. P\u00e5 trods af sin beskedne st\u00f8rrelse er luftspalten en af de mest afg\u00f8rende dimensioner i maskinkonstruktionen: den bestemmer virkningsgraden, effektfaktoren, startmomentet og \u2013 hvilket er af direkte interesse for p\u00e5lidelighedsingeni\u00f8ren \u2013 maskinens modtagelighed for <a href=\"https:\/\/vibromera.eu\/da\/glossary\/magnetic-pull\/\">ubalanceret magnetisk tiltr\u00e6kning<\/a> og det deraf f\u00f8lgende <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a>.<\/p>\n<h2>1. Definition: Hvad er luftspalten?<\/h2>\n<p>Luftspalten er det mellemrum, der adskiller rotor- og statorjernet, s\u00e5 rotoren kan dreje frit, samtidig med at magnetfluxen kan passere fra den ene del til den anden. Funktionelt set er det det element i hele magnetkredsl\u00f8bet, der har den h\u00f8jeste reluktans \u2013 luft er omtrent tusind gange mindre magnetisk gennemtr\u00e6ngelig end elektrisk st\u00e5l \u2013 og derfor er det bredden og ensartetheden af luftspalten, der i h\u00f8j grad bestemmer magnetfeltets opf\u00f8rsel. To egenskaber er af afg\u00f8rende betydning hver for sig: <em>magnitude<\/em> af mellemrummet (hvor bredt det er) og dets <em>uniformity<\/em> (om det er ens hele vejen rundt i boringen).<\/p>\n<p>Begge dele har vidtr\u00e6kkende konsekvenser. Et uensartet mellemrum skaber ubalancerede radiale magnetiske kr\u00e6fter, der for\u00e5rsager vibrationer og fremskynder <a href=\"https:\/\/vibromera.eu\/da\/glossary\/bearing-wear\/\">slid p\u00e5 lejer<\/a>, mens et for stort spalteafstand stille og roligt forringer effektiviteten og \u00f8ger den magnetiseringsstr\u00f8m, som motoren tr\u00e6kker for at opbygge sin magnetfeltstyrke. Kunsten ved motorkonstruktion ligger i at v\u00e6lge den mindste spalteafstand, som mekanikken sikkert kan klare.<\/p>\n<h2>2. Typiske dimensioner for luftspalter<\/h2>\n<p>Luftspaltens absolutte st\u00f8rrelse stiger med maskinens st\u00f8rrelse, men som en <em>fraction<\/em> jo st\u00f8rre boringsdiameteren er, desto mere krymper den \u2014 store maskiner k\u00f8rer med forholdsm\u00e6ssigt mindre spillerum, fordi deres rotorer er stivere i forhold til deres diameter.<\/p>\n<h3>Efter motorst\u00f8rrelse<\/h3>\n<ul>\n<li><strong>Sm\u00e5 motorer (&lt; 10 hk):<\/strong> 0,3\u20130,6 mm (0,012\u20130,024 tommer).<\/li>\n<li><strong>Mellemstore motorer (10\u2013200 hk):<\/strong> 0,5\u20131,2 mm (0,020\u20130,047 tommer).<\/li>\n<li><strong>Store motorer (200\u20131000 hk):<\/strong> 1,0\u20132,0 mm (0,040\u20130,080 tommer).<\/li>\n<li><strong>Meget store motorer (&gt; 1000 hk):<\/strong> 1,5\u20133,0 mm (0,060\u20130,120 tommer).<\/li>\n<li><strong>Generel tendens:<\/strong> St\u00f8rre maskiner har st\u00f8rre absolutte mellemrum, men et mindre mellemrum i procent af diameteren.<\/li>\n<\/ul>\n<h3>Efter motortype<\/h3>\n<ul>\n<li><strong>Induktionsmotorer:<\/strong> st\u00f8rre mellemrum, typisk 0,5\u20132,0 mm.<\/li>\n<li><strong>Synkronmotorer:<\/strong> i store tr\u00e6k svarer til induktionsmaskiner.<\/li>\n<li><strong>DC motors:<\/strong> meget sm\u00e5 ankerafstande, 0,3\u20131,0 mm.<\/li>\n<li><strong>H\u00f8jeffektive konstruktioner:<\/strong> har tendens til at ligge i den mindre ende af deres klasse for at opn\u00e5 bedre ydeevne.<\/li>\n<\/ul>\n<h2>3. Hvorfor luftspalten er vigtig<\/h2>\n<h3>Elektromagnetiske egenskaber<\/h3>\n<ul>\n<li><strong>Reluktans i magnetkredsl\u00f8bet:<\/strong> luftspalten er den dominerende reluktans i fluxvejen; alt andet (st\u00e5let) er forholdsvis gennemtr\u00e6ngeligt.<\/li>\n<li><strong>Magnetiseringsstr\u00f8m:<\/strong> Et mindre spaltem\u00e5l kr\u00e6ver mindre magnetiseringsstr\u00f8m for at opn\u00e5 den samme magnetflux, hvilket forbedrer effektfaktoren.<\/li>\n<li><strong>Effektivitet:<\/strong> Mindre mellemrum er generelt mere effektive, da de mindsker magnetiseringstabet.<\/li>\n<li><strong>Momentproduktion:<\/strong> Et mindre mellemrum giver en st\u00e6rkere magnetisk kobling og dermed et bedre drejningsmoment, herunder startmomentet.<\/li>\n<\/ul>\n<h3>Mekaniske overvejelser<\/h3>\n<ul>\n<li><strong>Frigang:<\/strong> Afstanden skal kunne opfange akselafb\u00f8jning, lejetolerancer og termisk udvidelse, uden at rotoren nogensinde kommer i ber\u00f8ring med statoren.<\/li>\n<li><strong>Sikkerhedsmargin:<\/strong> Det forhindrer kontakt mellem rotor og stator under vibrationsspidser eller us\u00e6dvanlige driftsforhold.<\/li>\n<li><strong>Manufacturability:<\/strong> Det valgte mellemrum skal kunne opn\u00e5s gentagne gange inden for de normale produktionstolerancer.<\/li>\n<\/ul>\n<p>Disse to kr\u00e6fter tr\u00e6kker i hver sin retning, og derfor er luftspalten i bund og grund et kompromis snarere end en v\u00e6rdi, man blindt skal fors\u00f8ge at minimere. Den mekaniske virkelighed ved <a href=\"https:\/\/vibromera.eu\/da\/glossary\/eccentricity\/\">excentricitet<\/a> I praksis betyder det, at en konstrukt\u00f8r, der v\u00e6lger et for lille mellemrum, blot bytter effektivitet mod risikoen for \u00f8del\u00e6ggende gnidning.<\/p>\n<h2>4. Luftspalteekscentricitet<\/h2>\n<p>Ekscentricitet i luftspalten er uensartetheden i afstanden rundt om omkredsen \u2014 den absolut vigtigste fejl i luftspalten for vibrationsanalytikeren.<\/p>\n<ul>\n<li><strong>Ensartet spalte:<\/strong> den samme dimension i alle vinkelpositioner.<\/li>\n<li><strong>Excentrisk spalte:<\/strong> varierer rundt om boringen \u2014 lille p\u00e5 den ene side, st\u00f8rre p\u00e5 den modsatte side.<\/li>\n<li><strong>Kvantificering:<\/strong> excentricitet = (g<sub>max<\/sub> \u2212 g<sub>min<\/sub>) \/ g<sub>Gennemsnit<\/sub>, udtrykt i procent.<\/li>\n<li><strong>Tilladt gr\u00e6nse:<\/strong> typisk &lt; 10 % for at sikre korrekt drift.<\/li>\n<\/ul>\n<p>Ingeni\u00f8rer skelner desuden mellem <strong>statisk ekscentricitet<\/strong> (rotoren sidder sk\u00e6vt, men det smalle punkt forbliver p\u00e5 samme faste sted \u2014 som regel p\u00e5 grund af en fejl i boringen eller samlingen) fra <strong>dynamisk ekscentricitet<\/strong> (den smalle del roterer sammen med akslen \u2014 en b\u00f8jet eller excentrisk rotor). De to frembringer spektralsignaturer, der adskiller sig en smule fra hinanden, og det er netop det, der g\u00f8r det muligt at skelne dem fra hinanden ved hj\u00e6lp af diagnostik.<\/p>\n<h3>\u00c5rsager til ekscentricitet<\/h3>\n<ul>\n<li><strong>Lejeslid:<\/strong> g\u00f8r det muligt for rotoren at s\u00e6tte sig sk\u00e6vt i sit hus.<\/li>\n<li><strong>Fremstillingstolerancer:<\/strong> Statorboringen eller rotoren er ikke helt koncentrisk.<\/li>\n<li><strong>Montagefejl:<\/strong> sk\u00e6ve endeplader eller en sk\u00e6v rotor.<\/li>\n<li><strong>Termisk forvr\u00e6ngning:<\/strong> Uj\u00e6vn opvarmning, der forvrider rundingen.<\/li>\n<li><strong>Rammeforvr\u00e6ngning:<\/strong> <a href=\"https:\/\/vibromera.eu\/da\/glossary\/soft-foot\/\">bl\u00f8d fod<\/a> eller monteringssp\u00e6ndinger, der forvrider rammen og boringen.<\/li>\n<\/ul>\n<h3>Virkninger af ekscentricitet<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/vibromera.eu\/da\/glossary\/magnetic-pull\/\">Ubalanceret magnetisk tr\u00e6k<\/a> (UMP):<\/strong> en netto-radialkraft, der tr\u00e6kker rotoren mod siden med den lille luftspalte, hvilket har tendens til at forv\u00e6rre ekscentriciteten i en tilbagekoblingssl\u00f8jfe.<\/li>\n<li><strong>Vibration ved netrelaterede frekvenser:<\/strong> statisk ekscentricitet giver typisk en top ved 2\u00d7 netfrekvensen <a href=\"https:\/\/vibromera.eu\/da\/glossary\/electrical-frequency\/\">elektrisk frekvens<\/a> (100 Hz ved 50 Hz forsyning, 120 Hz ved 60 Hz), mens dynamisk ekscentricitet prim\u00e6rt viser sig ved 1\u00d7 driftshastighed med polpassage-sideb\u00e5nd.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/da\/glossary\/pole-pass-frequency\/\">Polpassagefrekvens<\/a> sidebands:<\/strong> et karakteristisk diagnostisk m\u00f8nster, der str\u00e6kker sig over netfrekvensens top.<\/li>\n<li><strong>Overbelastning af lejer:<\/strong> Den asymmetriske UMP belaster den ene side af lejet, hvilket fremskynder slitage.<\/li>\n<li><strong>Tab af effektivitet:<\/strong> Et forvr\u00e6nget magnetisk kredsl\u00f8b er aldrig optimalt.<\/li>\n<\/ul>\n<h2>5. M\u00e5ling og vurdering af luftspalten<\/h2>\n<h3>Direkte m\u00e5ling (motor adskilt)<\/h3>\n<ul>\n<li><strong>Feeler gauges:<\/strong> Inds\u00e6t bladm\u00e5lere mellem rotor og stator flere steder.<\/li>\n<li><strong>Fremgangsm\u00e5de:<\/strong> M\u00e5l p\u00e5 8\u201312 steder, der er j\u00e6vnt fordelt rundt om omkredsen.<\/li>\n<li><strong>Beregne:<\/strong> gennemsnittet, minimum, maksimum og den resulterende ekscentricitetsprocent.<\/li>\n<li><strong>N\u00e5r:<\/strong> under en motoroverhaling eller udskiftning af lejer, n\u00e5r rotoren er taget ud.<\/li>\n<\/ul>\n<h3>Indirekte vurdering (motor i gang)<\/h3>\n<p>Det er sj\u00e6ldent muligt at skille en maskine ad, mens den er i drift, s\u00e5 luftspaltens tilstand vurderes normalt ud fra dens elektriske og mekaniske signaturer ved hj\u00e6lp af <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration-analysis\/\">Vibrationsanalyse<\/a>:<\/p>\n<ul>\n<li><strong>Vibration ved dobbelt linjefrekvens:<\/strong> forh\u00f8jet amplitude tyder p\u00e5 en uensartet luftspalte \u2014 bekr\u00e6ft med str\u00f8m- og belastet\/ubelastet-kontrol, da forsyningsubalance og resonans i rammen kan \u00f8ge den samme top.<\/li>\n<li><strong>Sideb\u00e5nd ved polpassering:<\/strong> deres tilstedev\u00e6relse og amplitude f\u00f8lger graden af ekscentricitet.<\/li>\n<li><strong>Analyse af motorstr\u00f8mssignatur (MCSA):<\/strong> Luftspalteeffekter p\u00e5virker statorstr\u00f8mmen og viser sig i dens spektrum.<\/li>\n<li><strong>Akustisk st\u00f8j:<\/strong> intensiteten af den elektromagnetiske brummen stiger ofte med excentriciteten.<\/li>\n<\/ul>\n<p>I marken kan et tokanalsinstrument som f.eks. <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> g\u00f8r denne vurdering praktisk: med <a href=\"https:\/\/vibromera.eu\/da\/glossary\/accelerometer\/\">Accelerometre<\/a> p\u00e5 motorens lejehus opfanger den <a href=\"https:\/\/vibromera.eu\/da\/glossary\/spectrum\/\">vibrationsspektrum<\/a> ved driftshastighed, s\u00e5 analytikeren kan identificere toppen ved dobbelt linjefrekvens og dens pol-pass-sideb\u00e5nd uden at standse produktionen. Da symptomer p\u00e5 luftspalte overlapper med simple mekaniske <a href=\"https:\/\/vibromera.eu\/da\/glossary\/unbalance\/\">ubalance<\/a>, bekr\u00e6fter analytikeren den elektriske \u00e5rsag ved at observere, om den mist\u00e6nkte top forsvinder i det \u00f8jeblik, motoren afbrydes sp\u00e6ndingen \u2014 et coast-down-trick, som mekaniske fejl ikke kan efterligne. Du kan omregne driftshastighed og netfrekvens til de n\u00f8jagtige toppe, du skal kigge efter, ved hj\u00e6lp af vores <a href=\"https:\/\/vibromera.eu\/da\/calculators\/motor-electrical-frequencies\/\">Motor elektrisk defektfrekvensberegner<\/a>, og sammenlign det m\u00e5lte samlede niveau med gr\u00e6nsev\u00e6rdierne ved hj\u00e6lp af <a href=\"https:\/\/vibromera.eu\/da\/calculators\/vibration-velocity\/\">ISO 20816-v\u00e6rkt\u00f8j til m\u00e5ling af vibrationshastighed<\/a>.<\/p>\n<h2>6. Problemer med luftspalter og l\u00f8sninger<\/h2>\n<h3>For lille (under minimumskravene)<\/h3>\n<p><strong>Konsekvenser:<\/strong> risiko for rotor-stator-kontakt ved vibration eller udb\u00f8jning; meget stort magnetisk tr\u00e6k, hvis luftspalten ogs\u00e5 er ekscentrisk; skader under opstart eller transiente tilstande.<\/p>\n<ul>\n<li>Fremstillingsfejl \u2192 bearbejd rotoren p\u00e5 ny eller bor statoren op igen.<\/li>\n<li>Forkert rotor installeret \u2192 Udskift med korrekt rotor<\/li>\n<li>Slid p\u00e5 lejerne f\u00e5r rotoren til at forskubbe sig \u2192 udskift lejerne og kontroller, at afstanden er genoprettet.<\/li>\n<\/ul>\n<h3>For stor (overskrider den maksimale specifikation)<\/h3>\n<p><strong>Konsekvenser:<\/strong> nedsat effektivitet som f\u00f8lge af h\u00f8jere magnetiseringsstr\u00f8m, lavere effektfaktor, reduceret startmoment og h\u00f8jere tomgangsstr\u00f8m. Denne tilstand er normalt mindre kritisk \u2013 maskinen kan k\u00f8re, men med forringet ydeevne.<\/p>\n<h3>Uensartet (ekscentrisk) \u2014 det almindelige, problematiske tilf\u00e6lde<\/h3>\n<p>Eccentricity is the most frequent and most damaging air-gap defect because it is self-reinforcing: UMP pulls the rotor further off-centre, which increases UMP. It typically creates 2\u00d7 line-frequency vibration (static eccentricity) or 1\u00d7 vibration with pole-pass sidebands (dynamic eccentricity) and accelerates bearing wear through that positive-feedback loop. The remedy is to replace worn bearings, correct any frame distortion, and verify rotor concentricity.<\/p>\n<h3>Diagnostisk oversigt<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Symptom<\/th>\n<th>Sandsynligvis et problem med luftspalten<\/th>\n<\/tr>\n<tr>\n<td>H\u00f8j 2\u00d7 netfrekvensvibration<\/td>\n<td>Ekscentrisk mellemrum, ubalanceret magnetisk tiltr\u00e6kning<\/td>\n<\/tr>\n<tr>\n<td>Sideb\u00e5nd ved pol-pass-frekvenser<\/td>\n<td>Ikke-ensartet mellemrum<\/td>\n<\/tr>\n<tr>\n<td>H\u00f8j tomgangsstr\u00f8m<\/td>\n<td>For stort mellemrum<\/td>\n<\/tr>\n<tr>\n<td>Lavt startmoment<\/td>\n<td>For stort mellemrum<\/td>\n<\/tr>\n<tr>\n<td>Tegn p\u00e5 slid<\/td>\n<td>Utilstr\u00e6kkeligt mellemrum<\/td>\n<\/tr>\n<tr>\n<td>Asymmetrisk lejeslid<\/td>\n<td>Excentrisk mellemrum skaber UMP<\/td>\n<\/tr>\n<\/table>\n<h2>7. Tendenser, design og produktion<\/h2>\n<p>Da excentriciteten udvikler sig langsomt, er 2\u00d7-frekvenskomponenten en ideel parameter til <a href=\"https:\/\/vibromera.eu\/da\/glossary\/trending\/\">tendens<\/a> i l\u00f8bet af en motors levetid. En j\u00e6vnt stigende 2\u00d7-top er tegn p\u00e5 udviklende ekscentricitet \u2014 n\u00e6sten altid p\u00e5 grund af lejeslid \u2014 og indg\u00e5r direkte i beslutninger om udskiftning af lejer. Det er god praksis at dokumentere luftspaltem\u00e5linger med f\u00f8lerm\u00e5ler ved hver overhaling og sammenligne dem med b\u00e5de specifikationen p\u00e5 typeskiltet og den forrige afl\u00e6sning.<\/p>\n<p>P\u00e5 designsiden er luftspalten resultatet af en bevidst afvejning:<\/p>\n<ul>\n<li><strong>Smaller gap:<\/strong> bedre effektivitet, effektfaktor og drejningsmoment, men st\u00f8rre magnetisk tiltr\u00e6kning ved excentrisk drift og mindre mekanisk spillerum.<\/li>\n<li><strong>Larger gap:<\/strong> st\u00f8rre mekanisk frigang og lavere magnetisk tiltr\u00e6kning, men d\u00e5rligere effektivitet og h\u00f8jere magnetiseringsstr\u00f8m.<\/li>\n<li><strong>Optimisation:<\/strong> det mindste mellemrum, der er foreneligt med de mekaniske krav og de opn\u00e5elige produktionstolerancer.<\/li>\n<\/ul>\n<p>Tegningerne angiver en nominel luftspalte med tolerancer p\u00e5 ca. \u00b110\u201320 %, en gr\u00e6nse for ekscentricitet (ofte &lt; 10 %) samt kvalitetskontrol under fremstillingen. At bevare denne ensartede luftspalte gennem disciplineret lejevedligeholdelse \u2014 og verificere den via vibrationstrending \u2014 er det, der holder en motor effektiv, st\u00f8jsvag og sikker mod den katastrofale rotor-stator-kontakt, som kan afslutte en maskines levetid p\u00e5 f\u00e5 sekunder.<\/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 luftgab, den radiale frigang mellem motorrotor og stator, som er afg\u00f8rende for elektromagnetisk ydeevne, effektivitet og forebyggelse af magnetisk tr\u00e6k og rotor-stator-kontakt.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-20618","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/20618","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\/20618\/revisions"}],"predecessor-version":[{"id":102159,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/20618\/revisions\/102159"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=20618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=20618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=20618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}