{"id":197,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/pole-pass-frequency\/"},"modified":"2026-07-02T18:51:35","modified_gmt":"2026-07-02T18:51:35","slug":"pole-pass-frequency","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/sv\/glossary\/pole-pass-frequency\/","title":{"rendered":"Vad \u00e4r polpassfrekvens? Motorns elektromagnetiska krafter"},"content":{"rendered":"<h1>F\u00f6rst\u00e5 polpassfrekvensen<\/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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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\/197?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>Polpassfrekvens<\/strong> (PPF) \u00e4r den l\u00e5gfrekventa <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/vibration\/\">vibrationer<\/a> komponenten som genereras i en asynkron AC-motor n\u00e4r det roterande magnetf\u00e4ltet glider f\u00f6rbi rotorn. Den ber\u00e4knas som antalet poler multiplicerat med <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/slip-frequency\/\">glidfrekvens<\/a>: PPF = antal poler \u00d7 (synkront varvtal \u2212 faktiskt varvtal) \/ 60. Eftersom slipen \u00e4r liten \u00e4r PPF en mycket l\u00e5g frekvens \u2014 vanligtvis bara n\u00e5gra f\u00e5 hertz \u2014 och den visar sig normalt inte som en frist\u00e5ende topp utan som <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/sidebands\/\">sidband<\/a> sidband med PPF-avst\u00e5nd runt komponenterna f\u00f6r driftvarvtal och n\u00e4tfrekvens. Denna sliprelaterade modulering f\u00f6rst\u00e4rks kraftigt n\u00e4r motorn har <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/air-gap\/\">luftspalt<\/a> excentricitet, brutna rotorstavar eller ett uppriktningsproblem mellan rotor och stator. D\u00e4rf\u00f6r \u00e4r PPF ett av de mest anv\u00e4ndbara verktygen f\u00f6r att skilja <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/electrical-faults\/\">elektriska fel<\/a> fr\u00e5n rent mekaniska s\u00e5dana.<\/p>\n<p>PPF \u00e4r diagnostiskt viktig eftersom f\u00f6rh\u00f6jda <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/sidebands\/\">sidband<\/a> sideband med detta frekvensavst\u00e5nd tydligt pekar p\u00e5 ett elektromagnetiskt problem \u2014 en excentrisk rotor, brutna rotorstavar, ett oj\u00e4mnt luftgap eller dynamisk rotor\u2013stator-interaktion \u2014 snarare \u00e4n p\u00e5 <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/unbalance\/\">obalans<\/a> eller <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/misalignment\/\">feljustering<\/a>. Tolkat p\u00e5 r\u00e4tt s\u00e4tt visar den analytikern om motorn ska \u00f6ppnas eller om man ska leta n\u00e5gon annanstans i maskinlinjen.<\/p>\n<h2>1. Ber\u00e4kning av polpassagefrekvens<\/h2>\n<h3>Grundformeln<\/h3>\n<ul>\n<li><strong>PPF = P \u00d7 (N<sub>synkronisera<\/sub> \u2212 N) \/ 60<\/strong><\/li>\n<li>d\u00e4r <strong>P<\/strong> = antal poler,<\/li>\n<li><strong>N<sub>synkronisera<\/sub><\/strong> = synkront varvtal i RPM (N<sub>synkronisera<\/sub> = 120 \u00d7 n\u00e4tfrekvens \/ P),<\/li>\n<li><strong>N<\/strong> = rotorns faktiska varvtal i varv per minut,<\/li>\n<li>och resultatet anges i Hz. Termen (N<sub>synkronisera<\/sub> \u2212 N) \/ 60 \u00e4r slipfrekvensen uttryckt i Hz.<\/li>\n<\/ul>\n<p>Observera att PPF bygger p\u00e5 <em>difference<\/em> skillnaden mellan synkront och faktiskt varvtal \u2014 <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/slip-frequency\/\">slirning<\/a>. Vid tomg\u00e5ng g\u00e5r en asynkronmotor n\u00e4stan med synkront varvtal, s\u00e5 PPF n\u00e4rmar sig noll; n\u00e4r lasten \u00f6kar \u00f6kar slipen och d\u00e4rmed \u00e4ven PPF, vanligtvis till ungef\u00e4r 0.5\u20133.5 Hz vid m\u00e4rklast. F\u00f6rv\u00e4xla inte PPF med den rent mekaniska ordningen P \u00d7 driftvarvtal (f\u00f6r en 4-polig motor vid 1750 RPM \u00e4r det cirka 116.7 Hz) \u2014 det \u00e4r en harmonisk av axelrotationen, inte polpassfrekvensen. N\u00e4r du snabbt beh\u00f6ver omvandla driftvarvtal till en familj av ordningar kan v\u00e5r <a href=\"https:\/\/vibromera.eu\/sv\/calculators\/harmonic-frequency-calculator\/\">Harmonisk frekvenskalkylator<\/a> omvandlar varvtal (RPM) till Hz f\u00f6r ordningarna 1\u00d7\u201310\u00d7, och <a href=\"https:\/\/vibromera.eu\/sv\/calculators\/motor-electrical-frequencies\/\">Kalkylator f\u00f6r motorfelfrekvens<\/a> visar de elektromagnetiska frekvenserna sida vid sida.<\/p>\n<h3>Genomarbetade exempel<\/h3>\n<p><strong>4-polig motor vid 1750 varv\/min (60 Hz):<\/strong><\/p>\n<ul>\n<li>Synkront varvtal N<sub>synkronisera<\/sub> = 120 \u00d7 60 \/ 4 = 1800 RPM.<\/li>\n<li>Slip frequency = (1800 \u2212 1750) \/ 60 = 0.83 Hz.<\/li>\n<li><strong>PPF = 4 \u00d7 (1800 \u2212 1750) \/ 60 = 3.33 Hz<\/strong><\/li>\n<li>I vibrations <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/spectrum\/\">spektrum<\/a> det visar sig som sidband med \u00b13.33 Hz avst\u00e5nd runt 1\u00d7-toppen f\u00f6r driftvarvtal (29.2 Hz) och runt 2\u00d7 n\u00e4tfrekvens (120 Hz) \u2014 ett diagnostiskt m\u00f6nster f\u00f6r excentricitet och brutna rotorstavar.<\/li>\n<\/ul>\n<p><strong>6-polig motor vid 970 varv\/min (50 Hz):<\/strong><\/p>\n<ul>\n<li>Synkront varvtal N<sub>synkronisera<\/sub> = 120 \u00d7 50 \/ 6 = 1000 RPM.<\/li>\n<li>Slip frequency = (1000 \u2212 970) \/ 60 = 0.5 Hz.<\/li>\n<li><strong>PPF = 6 \u00d7 (1000 \u2212 970) \/ 60 = 3.0 Hz<\/strong><\/li>\n<li>Sidband med endast \u00b13.0 Hz avst\u00e5nd runt 1\u00d7-toppen (16.2 Hz) eller runt 2\u00d7 n\u00e4tfrekvens (100 Hz) \u00e4r l\u00e4tta att missa.<\/li>\n<li>F\u00f6r att uppl\u00f6sa dem kr\u00e4vs noggrann h\u00f6guppl\u00f6st <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/spectral-analysis\/\">spektralanalys<\/a>.<\/li>\n<\/ul>\n<h2>2. Den fysiska mekanismen<\/h2>\n<h3>Hur den elektromagnetiska kraften uppst\u00e5r<\/h3>\n<p>H\u00e4ndelsef\u00f6rloppet som leder till PPF \u00e4r enkelt:<\/p>\n<ol>\n<li>Statorlindningarna alstrar ett magnetf\u00e4lt som roterar med synkronhastighet.<\/li>\n<li>Det f\u00e4ltet \u00e4r uppbyggt av magnetiska poler i ett N\u2013S\u2013N\u2013S-m\u00f6nster.<\/li>\n<li>Rotorn g\u00e5r n\u00e5got l\u00e5ngsammare p\u00e5 grund av slip, s\u00e5 f\u00e4ltpolerna driver kontinuerligt f\u00f6rbi rotorn i st\u00e4llet f\u00f6r att f\u00f6rbli l\u00e5sta till den.<\/li>\n<li>Varje g\u00e5ng en f\u00e4ltpol glider f\u00f6rbi en viss punkt p\u00e5 rotorn (en h\u00f6gresistiv stav, en excentrisk sida av luftgapet) moduleras den magnetiska kraften som verkar p\u00e5 den punkten.<\/li>\n<li>With <strong>P<\/strong> poler passerar den punkten <strong>P<\/strong> g\u00e5nger per slipcykel.<\/li>\n<li>Frekvensen f\u00f6r den resulterande moduleringen \u00e4r d\u00e4rf\u00f6r P \u00d7 slipfrekvens = PPF \u2014 en l\u00e5ngsam &#8220;sv\u00e4vning&#8221; \u00f6verlagrad p\u00e5 vibrationerna vid driftvarvtal och n\u00e4tfrekvens.<\/li>\n<\/ol>\n<h3>J\u00e4mn luftspalt \u2013 en v\u00e4lfungerande motor<\/h3>\n<ul>\n<li>Rotorn \u00e4r centrerad i statorh\u00e5let.<\/li>\n<li>Luftspalten \u00e4r j\u00e4mn \u00f6ver hela omkretsen.<\/li>\n<li>Magnetkrafterna \u00e4r i balans och upph\u00e4ver varandra.<\/li>\n<li>PPF-relaterad modulering blir d\u00e4rf\u00f6r mycket l\u00e5g i amplitud.<\/li>\n<\/ul>\n<h3>Excentrisk luftspalt \u2013 en defekt motor<\/h3>\n<ul>\n<li>Rotorn sitter excentriskt i f\u00f6rh\u00e5llande till <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/bearing-wear\/\">slitage p\u00e5 lager<\/a>, a <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/bent-shaft\/\">b\u00f6jd axel<\/a>, eller ett tillverkningsfel.<\/li>\n<li>Luftspalten \u00e4r smalare p\u00e5 ena sidan och bredare p\u00e5 den andra.<\/li>\n<li>Magnetkrafterna hamnar i obalans \u2013 de \u00e4r starkare d\u00e4r mellanrummet \u00e4r mindre.<\/li>\n<li>En resulterande radiell kraft uppst\u00e5r \u2014 <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/magnetic-pull\/\">obalanserad magnetisk dragkraft<\/a> \u2014 och den moduleras vid PPF n\u00e4r f\u00e4ltpolerna glider f\u00f6rbi den smala sidan av gapet.<\/li>\n<li>Sidband med PPF-avst\u00e5nd utvecklas runt de huvudsakliga spektraltopparna och \u00f6kar med felets allvarlighetsgrad.<\/li>\n<\/ul>\n<h2>3. Sidband och diagnostiska m\u00f6nster<\/h2>\n<h3>Statisk excentricitet<\/h3>\n<p>H\u00e4r \u00e4r rotorns centrum f\u00f6rskjutet men st\u00e5r stilla i f\u00f6rh\u00e5llande till statorn:<\/p>\n<ul>\n<li><strong>M\u00f6nster:<\/strong> en f\u00f6rh\u00f6jd 2\u00d7 n\u00e4tfrekvenskomponent (100\/120 Hz); polpass-sideband \u00e4r svaga eller saknas eftersom f\u00f6rskjutningen inte roterar med axeln.<\/li>\n<li><strong>Orsak:<\/strong> lagerslitage, deformation i ram eller \u00e4ndsk\u00f6ld eller ett bearbetningsfel i statorns borrning.<\/li>\n<li><strong>Amplitud:<\/strong> 2\u00d7 n\u00e4tfrekvensens amplitud anger graden av excentricitet.<\/li>\n<\/ul>\n<h3>Dynamisk excentricitet<\/h3>\n<p>H\u00e4r kretsar rotorns centrum, eller snurrar, runt statorns centrum:<\/p>\n<ul>\n<li><strong>M\u00f6nster:<\/strong> toppar vid 1\u00d7 driftvarvtal och 2\u00d7 n\u00e4tfrekvens med sidband p\u00e5 PPF-avst\u00e5nd (t.ex. \u00b13.33 Hz i det 4-poliga exemplet ovan).<\/li>\n<li><strong>Orsaker:<\/strong> en b\u00f6jd axel, rotor <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/rotor-eccentricity\/\">excentricitet<\/a>, rotor-till-stator <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/rotor-rub\/\">gnugga<\/a> or bearing <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/looseness\/\">glapp<\/a>.<\/li>\n<li><strong>More severe:<\/strong> det signalerar en aktiv dynamisk interaktion snarare \u00e4n en fast f\u00f6rskjutning. Samma sidbandsfamilj kring polpassage runt 1\u00d7 och dess \u00f6vertoner \u00e4r den klassiska signaturen f\u00f6r brutna rotorstavar.<\/li>\n<\/ul>\n<h3>Blandad excentricitet<\/h3>\n<ul>\n<li>En kombination av statiska och dynamiska effekter.<\/li>\n<li>Detta \u00e4r det vanligaste tillst\u00e5ndet hos riktiga motorer.<\/li>\n<li>Den ger upphov till komplexa sidbandsm\u00f6nster.<\/li>\n<li>Det kr\u00e4vs en noggrann analys f\u00f6r att tolka det korrekt.<\/li>\n<\/ul>\n<h2>4. Diagnostisk tolkning<\/h2>\n<p>Eftersom PPF bara \u00e4r n\u00e5gra f\u00e5 hertz bed\u00f6ms den genom styrkan hos sidbanden runt topparna f\u00f6r 1\u00d7 driftvarvtal och 2\u00d7 n\u00e4tfrekvens, l\u00e4st som ett kontinuum:<\/p>\n<h3>L\u00e5g \u2014 polpass-sideband \u00e4r knappt synliga \u00f6ver brusgolvet<\/h3>\n<ul>\n<li>Ett normalt tillst\u00e5nd.<\/li>\n<li>En j\u00e4mn luftspalt och god koncentricitet mellan rotor och stator.<\/li>\n<li>Inga korrigerande \u00e5tg\u00e4rder beh\u00f6vs.<\/li>\n<\/ul>\n<h3>M\u00e5ttlig \u2014 sidebanden \u00e4r tydligt synliga men ligger l\u00e5ngt under b\u00e4rartoppen<\/h3>\n<ul>\n<li>L\u00e4tt oj\u00e4mnhet i luftgapet eller tidig f\u00f6rs\u00e4mring av rotorkretsen.<\/li>\n<li>H\u00e5ll koll p\u00e5 utvecklingen och kontrollera lagrets skick.<\/li>\n<li>Kontrollera rotorns l\u00e4ge om det g\u00e5r att komma \u00e5t den.<\/li>\n<li>Det \u00e4r inte akut, men det b\u00f6r uppm\u00e4rksammas.<\/li>\n<\/ul>\n<h3>H\u00f6g \u2014 sidebanden n\u00e4rmar sig b\u00e4rartoppen i amplitud<\/h3>\n<ul>\n<li>Betydande excentricitet, brutna rotorstavar eller ett problem med luftgapet.<\/li>\n<li>En tydlig l\u00e5gfrekvent &#8220;sv\u00e4vning&#8221; kan k\u00e4nnas eller h\u00f6ras vid PPF.<\/li>\n<li>Risk f\u00f6r kontakt mellan rotor och stator.<\/li>\n<li>\u00d6kande elektromagnetiska krafter som p\u00e5skyndar skadorna.<\/li>\n<li>Planera f\u00f6r reparation eller utbyte.<\/li>\n<\/ul>\n<p>I praktiken bed\u00f6mer analytikern s\u00e4llan PPF isolerat. En b\u00e4rbar tv\u00e5kanalsanalysator som till exempel <a href=\"https:\/\/vibromera.eu\/sv\/produkt\/balanset-1\/\">Balanset-1A<\/a>, anv\u00e4nds vid lagerhusen, f\u00e5ngar spektrumet och uppl\u00f6ser polpassage-sidbanden runt 1\u00d7- och n\u00e4tfrekvenstopparna \u2014 och, lika viktigt, bekr\u00e4ftar om den dominerande komponenten \u00e4r elektromagnetisk eller den enkla 1\u00d7-toppen fr\u00e5n ett mekaniskt fel. Den skillnaden avg\u00f6r allt som f\u00f6ljer: en elektromagnetisk signatur leder dig in i motorn, medan en ren 1\u00d7-topp som f\u00f6rsvinner s\u00e5 snart str\u00f6mmen bryts pekar p\u00e5 <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/unbalance\/\">obalans<\/a> du kan korrigera genom att <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/faltbalansering\/\">f\u00e4ltbalansering<\/a> rotorn p\u00e5 plats.<\/p>\n<h2>5. Sambandet med andra motorfrekvenser<\/h2>\n<p>PPF \u00e4r en ton i ett t\u00e4tbefolkat motorspektrum, och att k\u00e4nna igen var den ligger i f\u00f6rh\u00e5llande till sina grannar \u00e4r halva jobbet. En typisk hierarki f\u00f6r en 4-polig motor p\u00e5 1750 RPM med 60 Hz matning \u00e4r:<\/p>\n<ul>\n<li><strong>Glipfrekvens:<\/strong> (1800 \u2212 1750) \/ 60 \u2248 0.83 Hz.<\/li>\n<li><strong>PPF:<\/strong> P \u00d7 slipfrekvens \u2014 cirka 3.3 Hz h\u00e4r, den l\u00e4gsta tonen i familjen.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/sv\/glossary\/running-speed\/\">Running speed<\/a> (1\u00d7):<\/strong> about 29.2 Hz.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/sv\/glossary\/electrical-frequency\/\">Linjefrekvens<\/a>:<\/strong> 60 Hz (eller 50 Hz i Europa).<\/li>\n<li><strong>Rotorns mekaniska ordning P \u00d7 driftvarvtal:<\/strong> cirka 117 Hz \u2014 ofta f\u00f6rv\u00e4xlad med PPF, men det \u00e4r en harmonisk av axelvarvtalet.<\/li>\n<li><strong>2\u00d7 n\u00e4tfrekvens:<\/strong> 120 Hz (eller 100 Hz) \u2014 den viktigaste elektromagnetiska komponenten f\u00f6r excentricitet.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/sv\/glossary\/motor-bar-pass-frequency\/\">Rotorstavspassfrekvens<\/a>:<\/strong> antal rotorstavar \u00d7 driftvarvtal, uppe i kilohertzomr\u00e5det.<\/li>\n<\/ul>\n<p>Det lilla avst\u00e5ndet mellan 2\u00d7 n\u00e4tfrekvens (120 Hz) och den n\u00e4rliggande <a href=\"https:\/\/vibromera.eu\/sv\/glossary\/harmonics\/\">\u00f6vertoner<\/a> ordningen av driftvarvtalet (4:e ordningen ligger h\u00e4r p\u00e5 cirka 117 Hz) \u00e4r exakt varf\u00f6r elektromagnetiska fel s\u00e5 l\u00e4tt f\u00f6rv\u00e4xlas med mekaniska \u2014 och varf\u00f6r den fina strukturen hos polpass-sidebanden, inte bara amplituden, \u00e4r den avg\u00f6rande ledtr\u00e5den. D\u00e4r bilden fortfarande \u00e4r tvetydig \u00e4r fr\u00e5nkoppling av matningen det definitiva testet: en elektromagnetisk komponent f\u00f6rsvinner omedelbart med f\u00e4ltet, medan en mekanisk bara avklingar n\u00e4r rotorn rullar ned.<\/p>\n<h2>6. Korrigeringsmetoder<\/h2>\n<h3>F\u00f6r mekanisk excentricitet<\/h3>\n<ul>\n<li>Byt ut slitna lager f\u00f6r att \u00e5terst\u00e4lla korrekt rotorcentrering<\/li>\n<li>R\u00e4tta till en b\u00f6jd axel eller byt ut rotorn.<\/li>\n<li>Montera om rotorn om felet \u00e4r ett installationsfel.<\/li>\n<li>Kontrollera att \u00e4ndk\u00e5pan sitter r\u00e4tt och att skruvarna \u00e4r ordentligt \u00e5tdragna.<\/li>\n<\/ul>\n<h3>F\u00f6r tillverkningsexcentricitet<\/h3>\n<ul>\n<li>I sv\u00e5ra fall kan det bli n\u00f6dv\u00e4ndigt att borra upp rotorn eller statorn p\u00e5 nytt.<\/li>\n<li>Byt ut motorn n\u00e4r det \u00e4r ekonomiskt motiverat.<\/li>\n<li>Acceptera tillst\u00e5ndet om vibrationerna h\u00e5ller sig inom acceptabla gr\u00e4nser.<\/li>\n<li>Dokumentera detta som utg\u00e5ngspunkt f\u00f6r framtida j\u00e4mf\u00f6relser.<\/li>\n<\/ul>\n<h3>Vid problem med luftspalten<\/h3>\n<ul>\n<li>Kontrollera lagrets skick och byt ut det om det \u00e4r slitet.<\/li>\n<li>Kontrollera rotorns axiella l\u00e4ge.<\/li>\n<li>Kontrollera om ramen \u00e4r skev eller om det finns problem med \u00e4ndk\u00e5pan.<\/li>\n<li>M\u00e4t den faktiska luftspalten d\u00e4r den \u00e4r \u00e5tkomlig.<\/li>\n<\/ul>\n<p>Polpassfrekvensen \u00e4r sammanfattningsvis en sliprelaterad, motorspecifik l\u00e5gfrekvenskomponent som \u00f6ppnar ett f\u00f6nster mot elektromagnetisk rotor\u2013stator-interaktion och luftgapets j\u00e4mnhet. Att beh\u00e4rska dess ber\u00e4kning, k\u00e4nna igen dess sidebandsignaturer och tolka deras amplitudtrender g\u00f6r att en ingenj\u00f6r med s\u00e4kerhet kan diagnostisera elektromagnetiska fel \u2014 och styra underh\u00e5llsinsatsen till r\u00e4tt plats i st\u00e4llet f\u00f6r att jaga en mekanisk orsak som aldrig fanns d\u00e4r.<\/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 polpassfrekvens (PPF), vibrationsfrekvensen som genereras av rotorns interaktion med statorpoler, diagnostik f\u00f6r luftgapsexcentricitet och elektromagnetiska problem i motorer.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[114,109],"tags":[],"class_list":["post-197","glossary","type-glossary","status-publish","hentry","category-analysis","category-glossary"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/197","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\/197\/revisions"}],"predecessor-version":[{"id":102086,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/glossary\/197\/revisions\/102086"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/media?parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/categories?post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/tags?post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}