{"id":215,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/rotor-bar-defects\/"},"modified":"2026-07-03T09:57:24","modified_gmt":"2026-07-03T09:57:24","slug":"rotor-bar-defects","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/sv\/glossary\/rotor-bar-defects\/","title":{"rendered":"Vad \u00e4r defekter i rotorst\u00e5ngen? Trasiga st\u00e4nger i motorer"},"content":{"rendered":"<h1>F\u00f6rst\u00e5 rotorst\u00e5ngsdefekter<\/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\/sv\/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\/sv\/product\/balanset-1\/\" title=\"Portabel balanserare &amp; 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 komplett kit med portabel balanserare och 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\/sv\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/sv\/product\/balanset-1\/\" title=\"Portabel balanserare &amp; vibrationsanalysator Balanset-1A\">Portabel balanserare &amp; 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 (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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\u00e4gg till i varukorgen: \u201dPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Portable balancer &amp; Vibration analyzer Balanset-1A&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/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 - n\u00e4rbild\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/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 (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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\u00e4gg till i varukorgen: \u201dVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Vibration sensor&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (lasertakometer)\">\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 (lasertakometer)\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (lasertakometer)\">Optisk sensor (lasertakometer)<\/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 (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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\u00e4gg till i varukorgen: \u201dOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Optical Sensor (Laser Tachometer)&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/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 rotorbalanseringssats: b\u00e4rv\u00e4ska, flerkanalig signalkonditionerare, handh\u00e5llen analysator, magnetisk bas, vibrationssensorer och spiralformade kablar.\" 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\/sv\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/sv\/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 (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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\u00e4gg till i varukorgen: \u201dBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Balanset-4&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/magnet-stand\/\" title=\"Magnetiskt 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=\"Magnetf\u00e4ste.\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/product\/magnet-stand\/\" title=\"Magnetiskt stativ Insize-60-kgf\">Magnetiskt 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 (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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\u00e4gg till i varukorgen: \u201dMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Magnetic Stand Insize-60-kgf&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/reflective-tape\/\" title=\"Reflekterande tejp\">\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=\"Reflekterande tejp\" 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\/sv\/product-category\/parts\/\" rel=\"tag\">Delar<\/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\/sv\/product\/reflective-tape\/\" title=\"Reflekterande tejp\">Reflekterande tejp<\/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 (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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\u00e4gg till i varukorgen: \u201dReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Reflective tape&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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\/sv\/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\/sv\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balanserare &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-kit, inneh\u00e5ll med gr\u00e4nssnittsenhet, givare, varvr\u00e4knare och tillbeh\u00f6r\" 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\/sv\/product-category\/devices\/\" rel=\"tag\">Enheter<\/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\/sv\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balanserare &quot;Balanset-1A&quot; OEM\">Dynamisk balanserare \"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 (om till\u00e4mpligt)<\/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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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=\"L\u00e4gg till i varukorg\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"L\u00e4gg till i varukorg\" 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=\"\/sv\/wp-json\/wp\/v2\/glossary\/215?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\u00e4gg till i varukorgen: \u201dDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"&quot;Dynamic balancer \u201cBalanset-1A\u201d OEM&quot; har lagts till i din varukorg\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">L\u00e4gg till i varukorg<\/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>Rotorst\u00e5ngsdefekter<\/strong> \u2014 \u00e4ven kallade trasiga eller spruckna rotorskenor \u2014 \u00e4r brott, sprickor eller anslutningar med h\u00f6gt motst\u00e5nd i ledarskenorna i en kortslutningsinduktionsmotor <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/motor-defects\/\">motor<\/a> rotor. En kortslutningsrotor \u00e4r uppbyggd av aluminium- eller kopparst\u00e4nger som \u00e4r inb\u00e4ddade i sp\u00e5ren i en laminerad j\u00e4rnk\u00e4rna, d\u00e4r b\u00e5da \u00e4ndarna av varje st\u00e5ng \u00e4r sammanbundna med ett par kortslutningsringar. N\u00e4r en st\u00e5ng g\u00e5r av eller en f\u00f6rbindning i en kortslutningsring spricker kan str\u00f6mmen inte l\u00e4ngre fl\u00f6da obehindrat genom den skadade ledaren. Detta leder till elektromagnetisk asymmetri, pulserande vridmoment och ett mycket karakteristiskt <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/vibration\/\">vibrationer<\/a> och str\u00f6msignatur som k\u00e4nnetecknas av <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/sidebands\/\">sidband<\/a> spaced at the <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/pole-pass-frequency\/\">polpassfrekvens<\/a> (antalet poler \u00d7 slipfrekvensen).<\/p>\n<p>Fel p\u00e5 rotorst\u00e4nger st\u00e5r uppskattningsvis f\u00f6r 10\u201315 % av alla haverier i induktionsmotorer. De \u00e4r farliga just d\u00e4rf\u00f6r att de utvecklas gradvis: en enda <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/broken-rotor-bars\/\">trasig rotorst\u00e5ng<\/a> \u00f6verbelastar de omgivande komponenterna, och det som b\u00f6rjar med en spricka i en ledare kan leda till en kedjereaktion med flera brott, kraftiga vridmomentvariationer och slutligen att rotorn g\u00e5r s\u00f6nder om problemet inte uppt\u00e4cks i tid.<\/p>\n<h2>1. Olika typer av defekter p\u00e5 rotorskenor<\/h2>\n<p>Denna felgrupp omfattar flera olika mekanismer, som alla p\u00e5 liknande s\u00e4tt st\u00f6r rotorns elektriska symmetri:<\/p>\n<ul>\n<li><strong>Trasiga rotorst\u00e4nger:<\/strong> Ett fullst\u00e4ndigt brott p\u00e5 en ledarst\u00e5ng, vanligtvis n\u00e4ra en kortslutningsring d\u00e4r termisk och mekanisk belastning koncentreras. Ett brott b\u00f6rjar n\u00e4stan alltid som en utmattningsspricka och utvecklas till en fullst\u00e4ndig separation.<\/li>\n<li><strong>Spruckna kortslutningsringar:<\/strong> Sprickor i de kortslutningsringar som h\u00e5ller ihop st\u00e4ngerna, oftast vid \u00f6verg\u00e5ngen mellan st\u00e5ng och ring. Deras elektriska effekt motsvarar en trasig st\u00e5ng. De f\u00f6rekommer oftare i stora maskiner, i motorer som startar ofta och vid laster med h\u00f6g tr\u00f6ghet.<\/li>\n<li><strong>H\u00f6gresistiva f\u00f6rbindelser:<\/strong> En d\u00e5lig elektrisk f\u00f6rbindelse mellan st\u00e5ng och kortslutningsring, orsakad av tillverkningsfel, termisk cykling eller korrosion. Symptomen liknar en trasig st\u00e5ng men \u00e4r ofta intermittenta och ger mer subtila signaturer \u00e4n ett rent brott.<\/li>\n<li><strong>Rotorporositet:<\/strong> Gjuth\u00e5l i rotorer av pressgjuten aluminium som minskar ledarens effektiva tv\u00e4rsnitt. Porositet \u00e4r ett tillverkningsfel som kan ligga latent i \u00e5ratal innan det utvecklas till sprickor och brott.<\/li>\n<\/ul>\n<h2>2. Varf\u00f6r rotorst\u00e4ngerna g\u00e5r s\u00f6nder<\/h2>\n<p>Fel p\u00e5 st\u00e4nger beror p\u00e5 en kombination av termiska, mekaniska, tillverkningsm\u00e4ssiga och driftsm\u00e4ssiga faktorer som samverkar under motorns livsl\u00e4ngd.<\/p>\n<h3>Thermal stress<\/h3>\n<p>Vid varje start och stopp genomg\u00e5r rotorn en cykel av utvidgning och sammandragning. Eftersom aluminium expanderar betydligt mer \u00e4n den omgivande j\u00e4rnk\u00e4rnan, leder denna skillnad i utvidgning till att st\u00e4ngerna lossnar och att fogarna uts\u00e4tts f\u00f6r utmattning. Frekventa starter medf\u00f6r upprepade termiska chocker, och varje lokal punkt med h\u00f6gt motst\u00e5nd blir en v\u00e4rmepunkt som p\u00e5skyndar skadorna.<\/p>\n<h3>Mekanisk belastning<\/h3>\n<p>Ledarst\u00e4ngerna uts\u00e4tts ocks\u00e5 f\u00f6r <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/centrifugal-force\/\">centrifugalkraft<\/a> (s\u00e4rskilt viktigt i h\u00f6ghastighetsmaskiner), pulserande elektromagnetiska krafter under normal drift samt de kraftiga str\u00f6mmarna vid start som orsakar mekaniska st\u00f6tar. Externa <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/vibration-analysis\/\">vibrationer<\/a> Den kraft som \u00f6verf\u00f6rs fr\u00e5n den drivna lasten uts\u00e4tter st\u00e4ngerna f\u00f6r ytterligare p\u00e5frestningar.<\/p>\n<h3>Tillverkningsfel och driftsf\u00f6rh\u00e5llanden<\/h3>\n<p>Porositet i gjutningen, svag f\u00f6rbindelse mellan st\u00e5ng och kortslutningsring, materialinneslutningar och bristf\u00e4llig v\u00e4rmebehandling l\u00e4gger alla grunden f\u00f6r senare fel. Under drift \u00e4r de st\u00f6rsta riskfaktorerna frekventa starter, belastningar med h\u00f6g tr\u00f6ghet och l\u00e5nga accelerationstider, l\u00e5st-rotor-h\u00e4ndelser med sina extrema str\u00f6mmar samt enfasdrift \u2013 drift med en matningsfas bortfallen, vilket tvingar fram ett kraftigt asymmetriskt str\u00f6mf\u00f6rlopp genom buren.<\/p>\n<h2>3. Vibrations- och str\u00f6msignaturen<\/h2>\n<p>Det diagnostiska k\u00e4nnetecknet f\u00f6r skador p\u00e5 rotorst\u00e4nger \u00e4r en grupp sidband koncentrerade kring varvtalet.<\/p>\n<ul>\n<li><strong>Centraltopp:<\/strong> 1\u00d7 l\u00f6phastighet (f<sub>r<\/sub>), det normala <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/running-speed\/\">k\u00f6rhastighet<\/a> line.<\/li>\n<li><strong>Sidband:<\/strong> symmetriska par vid f<sub>r<\/sub> \u00b1 F<sub>P<\/sub>, f<sub>r<\/sub> \u00b1 2F<sub>P<\/sub>, f<sub>r<\/sub> \u00b1 3F<sub>P<\/sub>, where F<sub>P<\/sub> \u00e4r polpasseringsfrekvensen \u2014 antalet poler \u00d7 <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/slip-frequency\/\">glidfrekvens<\/a> (typiskt n\u00e5gra f\u00e5 hertz).<\/li>\n<li><strong>M\u00f6nster:<\/strong> j\u00e4mnt f\u00f6rdelade, symmetriska sidoband vid polpasseringsintervall \u2014 helt olikt sidobanden f\u00f6r <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/bearing-fault-frequencies\/\">bearing faults<\/a>, som ligger runt defektfrekvenserna.<\/li>\n<\/ul>\n<h3>Ber\u00e4kning av slip- och polpasseringsfrekvenser<\/h3>\n<p>Glidfrekvensen \u00e4r skillnaden mellan synkronhastigheten och den faktiska hastigheten, uttryckt i hertz: f<sub>s<\/sub> = (N<sub>synkronisera<\/sub> - N<sub>faktisk<\/sub>) \/ 60, och sidobandsavst\u00e5ndet \u00e4r polpasseringsfrekvensen F<sub>P<\/sub> = poles \u00d7 f<sub>s<\/sub>. T\u00e4nk p\u00e5 en 4-polig 60 Hz-motor med synkront varvtal 1800 rpm som k\u00f6rs vid 1750 rpm under belastning. D\u00e5 \u00e4r f<sub>s<\/sub> = (1800 \u2212 1750) \/ 60 = 0.833 Hz, F<sub>P<\/sub> = 4 \u00d7 0.833 = 3.33 Hz, och driftvarvtalslinjen ligger vid 29.17 Hz. Sidband visas d\u00e4rf\u00f6r vid 29.17 \u00b1 3.33 Hz \u2014 det vill s\u00e4ga vid 25.8 Hz och 32.5 Hz. A <a href=\"https:\/\/vibromera.eu\/sv\/calculators\/harmonic-frequency-calculator\/\">ber\u00e4kningsverktyg f\u00f6r harmoniska frekvenser<\/a> och en <a href=\"https:\/\/vibromera.eu\/sv\/calculators\/motor-slip-calculator\/\">ber\u00e4kningsverktyg f\u00f6r motorslirning<\/a> g\u00f6r denna omst\u00e4llning sm\u00e4rtfri n\u00e4r du s\u00e4tter upp en m\u00e4tning p\u00e5 verkstadsgolvet.<\/p>\n<h3>Lastberoende<\/h3>\n<p>Eftersom glidningen \u2013 och d\u00e4rmed str\u00f6mmen i de trasiga st\u00e4ngerna \u2013 \u00f6kar med belastningen, \u00e4r sidbanden belastningsk\u00e4nsliga. Vid obelastning \u00e4r de minimala; vid l\u00e4tt belastning b\u00f6rjar de framtr\u00e4da; och vid full belastning \u00e4r de som starkast och l\u00e4ttast att uppt\u00e4cka. Den praktiska regeln \u00e4r enkel: testa alltid en motor som misst\u00e4nks ha fel under normal driftsbelastning f\u00f6r b\u00e4sta k\u00e4nslighet.<\/p>\n<h3>Str\u00f6msignatur (MCSA)<\/h3>\n<p>Analys av motorstr\u00f6mssignaturen visar samma fysikaliska fenomen p\u00e5 det elektriska planet. H\u00e4r samlas sidbanden kring <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/electrical-frequency\/\">linjefrekvens<\/a> snarare \u00e4n l\u00f6phastighet, och de upptr\u00e4der vid f<sub>linje<\/sub> \u00b1 2\u00b7s\u00b7f<sub>linje<\/sub>, d\u00e4r s \u00e4r slip i per unit \u2014 samma \u00b1F<sub>P<\/sub> spacing as in vibration, since 2\u00b7s\u00b7f<sub>linje<\/sub> = F<sub>P<\/sub>. F\u00f6r 4-poliga 60 Hz-motorn ovan (s = 50\/1800 \u2248 2.8%) placerar det sidobanden vid 56.7 Hz och 63.3 Hz. Deras amplitud \u00f6kar med antalet brutna stavar, och i vissa fall uppt\u00e4cker MCSA felet tidigare \u00e4n vibration g\u00f6r. Samma sliprelaterade fysik ligger bakom den relaterade <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/pole-pass-frequency\/\">polpassfrekvens<\/a> used in <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/electrical-faults\/\">elektriskt fel<\/a> diagnos.<\/p>\n<h2>4. Detektion, diagnos och f\u00e4ltm\u00e4tning<\/h2>\n<p>Att uppl\u00f6sa sidoband bara n\u00e5gra f\u00e5 hertz fr\u00e5n en dominerande topp vid driftvarvtal kr\u00e4ver fin frekvensuppl\u00f6sning. En disciplinerad procedur ser ut s\u00e5 h\u00e4r:<\/p>\n<ol>\n<li><strong>Ber\u00e4kna det f\u00f6rv\u00e4ntade m\u00f6nstret:<\/strong> best\u00e4m synkront varvtal utifr\u00e5n antal poler och n\u00e4tfrekvens, m\u00e4t det faktiska driftvarvtalet och ber\u00e4kna slip- och polpasseringsfrekvenserna.<\/li>\n<li><strong>Ta fram ett h\u00f6guppl\u00f6st spektrum:<\/strong> use a fine <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/fft\/\">FFT<\/a> uppl\u00f6sning (b\u00e4ttre \u00e4n cirka 0,2 Hz) s\u00e5 att de t\u00e4tt liggande sidbanden tydligt skiljer sig fr\u00e5n 1\u00d7-linjen. A <a href=\"https:\/\/vibromera.eu\/sv\/calculators\/fft-resolution-calculator\/\">Ber\u00e4kningsverktyg f\u00f6r FFT-uppl\u00f6sning<\/a> hj\u00e4lper dig att v\u00e4lja r\u00e4tt sp\u00e4nnvidd och antal linjer.<\/li>\n<li><strong>S\u00f6k efter sidband:<\/strong> look for symmetric peaks at 1\u00d7 \u00b1 pole-pass frequency and its multiples.<\/li>\n<li><strong>Belastningstest:<\/strong> samla in data medan motorn \u00e4r belastad med sin normala driftsbelastning.<\/li>\n<li><strong>Bekr\u00e4fta m\u00f6nstret:<\/strong> Kontrollera att sidbanden \u00e4r symmetriska och har r\u00e4tt avst\u00e5nd innan du st\u00e4ller en diagnos.<\/li>\n<\/ol>\n<p>Denna typ av spektruminsamling med h\u00f6g uppl\u00f6sning \u00e4r precis vad ett b\u00e4rbart tv\u00e5kanalsinstrument som <a href=\"https:\/\/vibromera.eu\/sv\/produkt\/balanset-1\/\">Balanset-1A<\/a> \u00e4r byggd f\u00f6r. Genom att arbeta i motorns egna lager vid driftvarvtal registrerar den linjen f\u00f6r driftvarvtalet och dess polpasseringssidoband direkt p\u00e5 den k\u00f6rande maskinen, s\u00e5 att du kan bekr\u00e4fta en diagnos av brutna rotorstavar p\u00e5 plats utan demontering och sedan f\u00f6lja allvarlighetsgraden \u00f6ver tid.<\/p>\n<h3>Allvarlighetsbed\u00f6mning<\/h3>\n<p>En vanlig tumregel \u00e4r att gradera sv\u00e5righetsgraden utifr\u00e5n sidbandens h\u00f6jd i f\u00f6rh\u00e5llande till 1\u00d7-toppen:<\/p>\n<ul>\n<li><strong>Sidband under 40 % av 1\u00d7:<\/strong> m\u00f6jligen en enstaka sprucken eller trasig st\u00e5ng \u2013 forts\u00e4tt att h\u00e5lla uppsikt \u00f6ver den.<\/li>\n<li><strong>40\u201360 % av 1\u00d7:<\/strong> en eller flera bekr\u00e4ftade trasiga st\u00e4nger \u2013 planera f\u00f6r utbyte.<\/li>\n<li><strong>\u00d6ver 60 % av 1\u00d7:<\/strong> flera trasiga st\u00e4nger \u2014 m\u00e5ste bytas ut omg\u00e5ende.<\/li>\n<li><strong>Sidband som \u00e4r h\u00f6gre \u00e4n 1\u00d7-toppen:<\/strong> ett allvarligt tillst\u00e5nd som kr\u00e4ver omedelbara \u00e5tg\u00e4rder.<\/li>\n<\/ul>\n<h2>5. Konsekvenser och utveckling<\/h2>\n<p>Om man inte \u00e5tg\u00e4rdar ett enskilt fel f\u00f6rblir det s\u00e4llan ett enskilt fel. Skadan utvecklas genom tydliga stadier:<\/p>\n<ul>\n<li><strong>Inledande fel (en st\u00e5ng):<\/strong> svaga vridmomentsv\u00e4ngningar, sm\u00e5 framtr\u00e4dande sidband och minimalt prestandatapp. En motor kan g\u00e5 i flera m\u00e5nader i detta tillst\u00e5nd.<\/li>\n<li><strong>Progressiva fel (flera rotorstavar):<\/strong> Den str\u00f6m som skulle ha fl\u00f6dat genom den brutna rotorstaven leds \u00f6ver till intilliggande stavar och \u00f6verhettar dem; den termiska belastningen g\u00f6r sedan att \u00e4ven dessa stavar g\u00e5r av. Vridmomentpulseringarna och vibrationerna \u00f6kar, och skadan kan utvecklas fr\u00e5n en till flera brutna rotorstavar inom n\u00e5gra veckor.<\/li>\n<li><strong>Allvarligt tillst\u00e5nd:<\/strong> Flera intilliggande brutna stavar orsakar kraftiga vridmomentpulseringar, h\u00f6ga vibrationer och buller samt \u00f6verhettning av rotorn. Slutresultatet blir ett fullst\u00e4ndigt rotorhaveri, med en reell risk f\u00f6r f\u00f6ljdskador. <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/stator-defects\/\">stator<\/a> skador orsakade av f\u00f6r starka cirkulationsstr\u00f6mmar.<\/li>\n<\/ul>\n<h2>6. Korrigerande \u00e5tg\u00e4rder och f\u00f6rebyggande \u00e5tg\u00e4rder<\/h2>\n<p>N\u00e4r ett fel har bekr\u00e4ftats \u00e4r l\u00f6sningen att hantera det p\u00e5 ett genomt\u00e4nkt s\u00e4tt ist\u00e4llet f\u00f6r att v\u00e4nta p\u00e5 att systemet ska sluta fungera:<\/p>\n<ul>\n<li><strong>Vid detektering:<\/strong> f\u00f6rkorta \u00f6vervakningsintervallet (fr\u00e5n en g\u00e5ng i m\u00e5naden till en g\u00e5ng i veckan), bekr\u00e4fta diagnosen med hj\u00e4lp av MCSA, planera f\u00f6r byte av motor eller rotor, se till att en reservdel finns tillg\u00e4nglig f\u00f6r kritiska uppgifter samt utreda varf\u00f6r st\u00e4ngerna gick s\u00f6nder fr\u00e5n b\u00f6rjan.<\/li>\n<li><strong>Reparationsalternativ:<\/strong> Att byta ut rotorn \u00e4r den mest tillf\u00f6rlitliga l\u00f6sningen f\u00f6r stora maskiner; att byta ut hela motorn \u00e4r ofta det mest ekonomiska alternativet f\u00f6r sm\u00e5 maskiner; specialverkst\u00e4der kan gjuta om aluminiumrotorer; och om endast en stav har g\u00e5tt av kan maskinen i vissa fall forts\u00e4tta att anv\u00e4ndas under noggrann \u00f6vervakning.<\/li>\n<li><strong>F\u00f6rebyggande:<\/strong> Minimera antalet starter genom att anv\u00e4nda mjukstartare eller frekvensomriktare, undvik enfasdrift, se till att ventilationen och kylningen \u00e4r tillr\u00e4cklig, v\u00e4lj motorer som \u00e4r dimensionerade f\u00f6r den faktiska driftscykeln och satsa p\u00e5 tidig uppt\u00e4ckt f\u00f6r att kunna vidta \u00e5tg\u00e4rder innan felet f\u00f6rv\u00e4rras.<\/li>\n<\/ul>\n<p>Fel i rotorstavar \u00e4r bland de mest diagnostiskt tydliga motorfelen: deras karakteristiska polpasseringssidoband g\u00f6r dem tillf\u00f6rlitligt detekterbara genom b\u00e5de <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/vibration-diagnostics\/\">vibrationsdiagnostik<\/a> och str\u00f6manalys. Genom att uppt\u00e4cka dem i ett tidigt skede kan man f\u00f6rvandla ett potentiellt katastrofalt rotorhaveri och l\u00e5ngvariga oplanerade driftstopp till en planerad, hanterbar reparation.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/sv\/glossary\/\">\u2190 Tillbaka till huvudregistret<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e4r dig om rotorst\u00e5ngsdefekter i burmotorer, inklusive trasiga rotorst\u00e4nger och spruckna kortslutningsringar, som kan detekteras genom slirfrekvenssidband i vibrations- och str\u00f6manalys.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-215","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/215\/revisions"}],"predecessor-version":[{"id":102163,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/215\/revisions\/102163"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/media?parent=215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/categories?post=215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/tags?post=215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}