{"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\/fi\/glossary\/pole-pass-frequency\/","title":{"rendered":"Mik\u00e4 on napap\u00e4\u00e4st\u00f6taajuus? Moottorin s\u00e4hk\u00f6magneettiset voimat"},"content":{"rendered":"<h1>Napojen ohitustaajuuden ymm\u00e4rt\u00e4minen<\/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\/fi\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori 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 kannettava tasapainotin ja v\u00e4r\u00e4htelyanalysaattori, t\u00e4ydellinen sarja\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/balanset-1\/\" title=\"Kannettava tasapainotin ja t\u00e4rin\u00e4analysaattori Balanset-1A\">Kannettava tasapainotin &#038; t\u00e4rin\u00e4analysaattori 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\">&euro;<\/span>1,975.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">\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:n t\u00e4rin\u00e4anturin l\u00e4hikuva\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/vibration-sensor\/\" title=\"T\u00e4rin\u00e4anturi\">T\u00e4rin\u00e4anturi<\/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\">&euro;<\/span>90.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">\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=\"Optinen anturi (lasertakometri)\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optinen anturi (lasertakometri)\">Optinen anturi (lasertakometri)<\/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\">&euro;<\/span>124.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/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-roottorin tasapainotussarja: kantolaukku, monikanavainen signaalimuunnin, k\u00e4dess\u00e4 pidett\u00e4v\u00e4 analysaattori, magneettijalusta, t\u00e4rin\u00e4anturit ja kierretyt kaapelit.\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/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\">&euro;<\/span>6,803.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta 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=\"Magneettipohja.\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/magnet-stand\/\" title=\"Magneettinen jalusta Insize-60-kgf\">Magneettinen jalusta 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\">&euro;<\/span>46.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">\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=\"Heijastava nauha\" 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\/fi\/product-category\/parts\/\" rel=\"tag\">Osat<\/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\/fi\/product\/reflective-tape\/\" title=\"Heijastava nauha\">Heijastava nauha<\/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\">&euro;<\/span>10.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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\/fi\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &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-pakkauksen sis\u00e4lt\u00f6, jossa on liit\u00e4nt\u00e4yksikk\u00f6, anturit, kierroslukumittari ja lis\u00e4varusteet\" 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\/fi\/product-category\/devices\/\" rel=\"tag\">Laitteet<\/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\/fi\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynaaminen tasapainotin &quot;Balanset-1A&quot; OEM\">Dynaaminen tasapainotin \"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\">&euro;<\/span>1,735.00<\/span> + ALV (jos sovellettavissa)<\/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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Lis\u00e4\u00e4 ostoskoriin\" 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=\"\/fi\/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=\"Lis\u00e4\u00e4 ostoskoriin: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d on lis\u00e4tty ostoskoriin\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Lis\u00e4\u00e4 ostoskoriin<\/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>Napojen ohitustaajuus<\/strong> (PPF) on matalataajuinen <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/vibration\/\">t\u00e4rin\u00e4<\/a> komponentti, joka syntyy AC-oikosulkumoottorissa, kun py\u00f6riv\u00e4 magneettikentt\u00e4 luistaa roottorin ohi. Se lasketaan napojen lukum\u00e4\u00e4r\u00e4 kerrottuna <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/slip-frequency\/\">liukumataajuus<\/a>: PPF = napojen lukum\u00e4\u00e4r\u00e4 \u00d7 (synkroninen nopeus \u2212 todellinen nopeus) \/ 60. Koska luisto on pieni, PPF on hyvin matala taajuus \u2014 tyypillisesti vain muutamia hertsej\u00e4 \u2014 eik\u00e4 se yleens\u00e4 n\u00e4y erillisen\u00e4 piikkin\u00e4 vaan <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/sidebands\/\">sivunauhat<\/a> PPF:n v\u00e4lein sijoittuvina sivunauhoina py\u00f6rimisnopeus- ja verkkotaajuuskomponenttien ymp\u00e4rill\u00e4. T\u00e4m\u00e4 luistoon liittyv\u00e4 modulaatio voimistuu huomattavasti, kun moottorissa on <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/air-gap\/\">ilmarako<\/a> ep\u00e4keskisyytt\u00e4, katkenneita roottorisauvoja tai roottorin ja staattorin v\u00e4linen kohdistusongelma. T\u00e4m\u00e4n vuoksi PPF on yksi hy\u00f6dyllisimmist\u00e4 ty\u00f6kaluista erotettaessa <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/electrical-faults\/\">s\u00e4hk\u00f6viat<\/a> pelk\u00e4st\u00e4\u00e4n mekaanisista.<\/p>\n<p>PPF on diagnostisesti t\u00e4rke\u00e4, koska kohonneet <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/sidebands\/\">sivunauhat<\/a> t\u00e4h\u00e4n taajuuspisteeseen sijoittuvat sivunauhat viittaavat suoraan s\u00e4hk\u00f6magneettiseen ongelmaan \u2014 ep\u00e4keskiseen roottoriin, katkenneisiin roottorisauvoihin, ep\u00e4yhten\u00e4iseen ilmav\u00e4liin tai dynaamiseen roottori\u2013staattori-vuorovaikutukseen \u2014 eiv\u00e4tk\u00e4 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/unbalance\/\">ep\u00e4tasapaino<\/a> tai <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/misalignment\/\">ep\u00e4kohdistus<\/a>. Oikein tulkittuna se kertoo analyytikolle, pit\u00e4isik\u00f6 moottori avata vai tutkia junaa muualta.<\/p>\n<h2>1. Napaohitustaajuuden laskeminen<\/h2>\n<h3>Peruskaava<\/h3>\n<ul>\n<li><strong>PPF = P \u00d7 (N<sub>sync<\/sub> \u2212 N) \/ 60<\/strong><\/li>\n<li>jossa <strong>P<\/strong> = napojen lukum\u00e4\u00e4r\u00e4,<\/li>\n<li><strong>N<sub>sync<\/sub><\/strong> = synkroninen nopeus RPM-yksik\u00f6iss\u00e4 (N<sub>sync<\/sub> = 120 \u00d7 verkkotaajuus \/ P),<\/li>\n<li><strong>N<\/strong> = roottorin todellinen kierrosluku kierroksina minuutissa,<\/li>\n<li>ja tulos on Hz. Termi (N<sub>sync<\/sub> \u2212 N) \/ 60 on luistotaajuus ilmaistuna Hz-yksik\u00f6iss\u00e4.<\/li>\n<\/ul>\n<p>Huomaa, ett\u00e4 PPF perustuu <em>difference<\/em> synkronisen ja todellisen nopeuden v\u00e4liseen eroon \u2014 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/slip-frequency\/\">luisto<\/a>. Kuormittamattomana oikosulkumoottori k\u00e4y l\u00e4hes synkronisella nopeudella, joten PPF l\u00e4hestyy nollaa; kuorman kasvaessa luisto ja siten my\u00f6s PPF kasvavat, p\u00e4\u00e4tyen tyypillisesti noin 0.5\u20133.5 Hz:n alueelle nimelliskuormalla. \u00c4l\u00e4 sekoita PPF:\u00e4\u00e4 puhtaasti mekaaniseen kertalukuun P \u00d7 py\u00f6rimisnopeus (4-napaisella moottorilla 1750 RPM:ll\u00e4 se on noin 116.7 Hz) \u2014 se on akselin py\u00f6rimisen harmoninen, ei pole pass frequency. Kun haluat muuntaa py\u00f6rimisnopeuden nopeasti kertalukuperheeksi, meid\u00e4n <a href=\"https:\/\/vibromera.eu\/fi\/calculators\/harmonic-frequency-calculator\/\">Harmonisen taajuuden laskin<\/a> muuntaa kierrosluvun (RPM) hertseiksi (Hz) 1\u00d7\u201310\u00d7 komponenteille, ja <a href=\"https:\/\/vibromera.eu\/fi\/calculators\/motor-electrical-frequencies\/\">Moottorin s\u00e4hk\u00f6vikojen taajuuslaskuri<\/a> esitt\u00e4\u00e4 s\u00e4hk\u00f6magneettiset taajuudet vierekk\u00e4in.<\/p>\n<h3>Ratkaistut esimerkit<\/h3>\n<p><strong>4-napainen moottori, 1750 r\/min (60 Hz:n verkkoj\u00e4nnitteell\u00e4):<\/strong><\/p>\n<ul>\n<li>Synkroninen nopeus N<sub>sync<\/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>V\u00e4r\u00e4htelyss\u00e4 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/spectrum\/\">spektri<\/a> it appears as sidebands spaced \u00b13.33 Hz around the 1\u00d7 running-speed peak (29.2 Hz) and around 2\u00d7 line frequency (120 Hz) \u2014 a pattern diagnostic for eccentricity and broken rotor bars.<\/li>\n<\/ul>\n<p><strong>6-napainen moottori, 970 r\/min (50 Hz:n verkkoj\u00e4nnitteell\u00e4):<\/strong><\/p>\n<ul>\n<li>Synkroninen nopeus N<sub>sync<\/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>Sidebands spaced only \u00b13.0 Hz around the 1\u00d7 peak (16.2 Hz) or around 2\u00d7 line frequency (100 Hz) are easy to miss.<\/li>\n<li>Niiden erottaminen vaatii huolellista, korkearesoluutioista <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/spectral-analysis\/\">spektrianalyysi<\/a>.<\/li>\n<\/ul>\n<h2>2. Fyysinen mekanismi<\/h2>\n<h3>Miten s\u00e4hk\u00f6magneettinen voima syntyy<\/h3>\n<p>PPF:n syntymiseen johtava tapahtumaketju on yksinkertainen:<\/p>\n<ol>\n<li>Staattorin k\u00e4\u00e4mitykset muodostavat magneettikent\u00e4n, joka py\u00f6rii synkroninopeudella.<\/li>\n<li>Kyseinen kentt\u00e4 on j\u00e4rjest\u00e4ytynyt magneettisiksi navoiksi N\u2013S\u2013N\u2013S-kuvioon.<\/li>\n<li>Roottori k\u00e4y hieman hitaammin luiston vuoksi, joten kent\u00e4n navat ajautuvat jatkuvasti roottorin ohi sen sijaan, ett\u00e4 pysyisiv\u00e4t siihen lukittuneina.<\/li>\n<li>Joka kerta, kun kent\u00e4n napa liukuu tietyn kohdan ohi roottorissa (korkearesistanssinen sauva, ilmav\u00e4lin ep\u00e4keskinen puoli), t\u00e4h\u00e4n kohtaan vaikuttava magneettinen voima moduloituu.<\/li>\n<li>Kun <strong>P<\/strong> napaa, kyseinen kohta ohitetaan <strong>P<\/strong> kertaa jokaista luistosykli\u00e4 kohti.<\/li>\n<li>Syntyv\u00e4n modulaation taajuus on siis P \u00d7 luistotaajuus = PPF \u2014 hidas &#8220;syke&#8221;, joka on superponoitu py\u00f6rimisnopeus- ja verkkotaajuusv\u00e4r\u00e4htelyyn.<\/li>\n<\/ol>\n<h3>Tasainen ilmarako \u2014 moottori pysyy kunnossa<\/h3>\n<ul>\n<li>Roottori on keskitetty staattorin reik\u00e4\u00e4n.<\/li>\n<li>Ilmarako on tasainen koko keh\u00e4n ymp\u00e4ri.<\/li>\n<li>Magneettiset voimat ovat tasapainossa ja kumoavat toisensa.<\/li>\n<li>PPF:\u00e4\u00e4n liittyv\u00e4 modulaatio on siksi amplitudiltaan hyvin pieni.<\/li>\n<\/ul>\n<h3>Ep\u00e4keskinen ilmarako \u2014 moottori on viallinen<\/h3>\n<ul>\n<li>Roottori on sijoitettu ep\u00e4keskisesti <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/bearing-wear\/\">laakerin kuluminen<\/a>, a <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/bent-shaft\/\">taipunut akseli<\/a>tai valmistusvirhe.<\/li>\n<li>Ilmarako on toisella puolella kapeampi ja vastakkaisella puolella leve\u00e4mpi.<\/li>\n<li>Magneettiset voimat menett\u00e4v\u00e4t tasapainonsa \u2014 ne ovat voimakkaampia siell\u00e4, miss\u00e4 rako on kapeampi.<\/li>\n<li>Syntyy nettos\u00e4teisvoima \u2014 <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/magnetic-pull\/\">ep\u00e4tasapainoinen magneettinen vetovoima<\/a> \u2014 ja se moduloituu PPF:ll\u00e4, kun kent\u00e4n navat liukuvat ilmav\u00e4lin kapean puolen ohi.<\/li>\n<li>PPF:n v\u00e4lein sijoittuvat sivunauhat kehittyv\u00e4t p\u00e4\u00e4spektripiikkien ymp\u00e4rille ja kasvavat vakavuuden mukana.<\/li>\n<\/ul>\n<h2>3. Sivukaistat ja diagnostiset kuviot<\/h2>\n<h3>Staattinen eksentrisyys<\/h3>\n<p>T\u00e4ss\u00e4 roottorin keskipiste on siirtynyt, mutta se on paikallaan staattoriin n\u00e4hden:<\/p>\n<ul>\n<li><strong>Kuvio:<\/strong> kohonnut 2\u00d7 verkkotaajuuskomponentti (100\/120 Hz); pole-pass-sivunauhat ovat heikkoja tai puuttuvat, koska poikkeama ei py\u00f6ri akselin mukana.<\/li>\n<li><strong>Syy:<\/strong> laakerikuluminen, rungon tai p\u00e4\u00e4tykellon muodonmuutos tai staattorin porauksen koneistusvirhe.<\/li>\n<li><strong>Amplitudi:<\/strong> 2\u00d7 verkkotaajuuden amplitudi osoittaa ep\u00e4keskisyyden vakavuuden.<\/li>\n<\/ul>\n<h3>Dynaaminen ep\u00e4keskisyys<\/h3>\n<p>T\u00e4ss\u00e4 roottorin keskipiste kiert\u00e4\u00e4 tai py\u00f6rii staattorin keskipisteen ymp\u00e4ri:<\/p>\n<ul>\n<li><strong>Kuvio:<\/strong> 1\u00d7 running speed and 2\u00d7 line frequency peaks with sidebands spaced at PPF (e.g. \u00b13.33 Hz in the 4-pole example above).<\/li>\n<li><strong>Syyt:<\/strong> taipunut akseli, roottorin <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/rotor-eccentricity\/\">eksentrisyys<\/a>, roottorin ja staattorin v\u00e4linen <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/rotor-rub\/\">hankauma<\/a> tai laakeri <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/looseness\/\">l\u00f6ysyys<\/a>.<\/li>\n<li><strong>Vakavampi:<\/strong> it signals an active dynamic interaction rather than a fixed offset. The same pole-pass sideband family around 1\u00d7 and its harmonics is the classic signature of broken rotor bars.<\/li>\n<\/ul>\n<h3>Yhdistelm\u00e4ep\u00e4keskisyys<\/h3>\n<ul>\n<li>Staattisten ja dynaamisten vaikutusten yhdistelm\u00e4.<\/li>\n<li>T\u00e4m\u00e4 on todellisissa moottoreissa yleisimmin esiintyv\u00e4 tila.<\/li>\n<li>Se tuottaa monimutkaisia sivukaistakuvioita.<\/li>\n<li>Sen oikea tulkinta edellytt\u00e4\u00e4 huolellista analyysia.<\/li>\n<\/ul>\n<h2>4. Diagnoosin tulkinta<\/h2>\n<p>Because PPF is only a few hertz, it is judged through the strength of its sidebands around the 1\u00d7 running-speed and 2\u00d7 line-frequency peaks, read as a continuum:<\/p>\n<h3>Matala \u2014 pole-pass-sivunauhat tuskin n\u00e4kyv\u00e4t kohinatason yl\u00e4puolella<\/h3>\n<ul>\n<li>Normaali tilanne.<\/li>\n<li>Tasainen ilmarako ja hyv\u00e4 roottorin ja staattorin konsentrisyys.<\/li>\n<li>Korjaavia toimenpiteit\u00e4 ei tarvita.<\/li>\n<\/ul>\n<h3>Kohtalainen \u2014 sivunauhat n\u00e4kyv\u00e4t selv\u00e4sti mutta ovat selv\u00e4sti kantoaaltohuippua pienemm\u00e4t<\/h3>\n<ul>\n<li>Liev\u00e4 ilmav\u00e4lin ep\u00e4tasaisuus tai roottoripiirin varhainen heikkeneminen.<\/li>\n<li>Seuraa kehityst\u00e4 ja tarkista laakerien kunto.<\/li>\n<li>Tarkista roottorin asento, jos se on mahdollista.<\/li>\n<li>Ei v\u00e4litt\u00f6m\u00e4sti kriittinen, mutta vaatii huomiota.<\/li>\n<\/ul>\n<h3>Korkea \u2014 sivunauhojen amplitudi l\u00e4hestyy kantoaaltohuippua<\/h3>\n<ul>\n<li>Merkitt\u00e4v\u00e4 ep\u00e4keskisyys, katkenneet roottorisauvat tai ilmav\u00e4liongelma.<\/li>\n<li>Selv\u00e4 matalataajuinen &#8220;syke&#8221; voi tuntua tai kuulua PPF:ll\u00e4.<\/li>\n<li>Riski roottorin ja staattorin v\u00e4lisest\u00e4 kosketuksesta.<\/li>\n<li>Voimistuvat s\u00e4hk\u00f6magneettiset voimat, jotka kiihdytt\u00e4v\u00e4t vaurioiden syntymist\u00e4.<\/li>\n<li>Suunnittele korjaus tai vaihto.<\/li>\n<\/ul>\n<p>K\u00e4yt\u00e4nn\u00f6ss\u00e4 analyytikko arvioi PPF:\u00e4\u00e4 harvoin erillisen\u00e4 tekij\u00e4n\u00e4. Kannettava kaksikanavainen analysaattori, kuten <a href=\"https:\/\/vibromera.eu\/fi\/tuote\/balanset-1\/\">Balanset-1A<\/a>, used at the bearing housings, captures the spectrum and resolves the pole-pass sidebands around the 1\u00d7 and line-frequency peaks \u2014 and, just as importantly, confirms whether the dominant component is electromagnetic or the simple 1\u00d7 peak of a mechanical fault. That distinction decides everything that follows: an electromagnetic signature sends you inside the motor, while a clean 1\u00d7 peak that disappears the instant power is cut points to <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/unbalance\/\">ep\u00e4tasapaino<\/a> voit korjata seuraavasti: <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/kenttatasapaino\/\">kentt\u00e4tasapainotus<\/a> roottori paikallaan.<\/p>\n<h2>5. Suhde muihin moottorin taajuuksiin<\/h2>\n<p>PPF on yksi s\u00e4vy monimuotoisessa moottorispektriss\u00e4, ja sen sijainnin tunnistaminen suhteessa naapureihinsa on jo puoli voittoa. Tyypillinen hierarkia 4-napaiselle, 1750 r\/min:n moottorille 60 Hz:n verkkoj\u00e4nnitteell\u00e4 on seuraava:<\/p>\n<ul>\n<li><strong>Liukutaajuus:<\/strong> (1800 \u2212 1750) \/ 60 \u2248 0.83 Hz.<\/li>\n<li><strong>PPF:<\/strong> P \u00d7 luistotaajuus \u2014 t\u00e4ss\u00e4 noin 3.3 Hz, perheen matalin s\u00e4vy.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/running-speed\/\">K\u00e4yntinopeus<\/a> (1\u00d7):<\/strong> about 29.2 Hz.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/electrical-frequency\/\">Linjan taajuus<\/a>:<\/strong> 60 Hz (tai 50 Hz Euroopassa).<\/li>\n<li><strong>Roottorin mekaaninen kertaluku P \u00d7 py\u00f6rimisnopeus:<\/strong> noin 117 Hz \u2014 sekoitetaan usein PPF:\u00e4\u00e4n, mutta se on akselin py\u00f6rimisnopeuden harmoninen.<\/li>\n<li><strong>2\u00d7 verkkotaajuus:<\/strong> 120 Hz (tai 100 Hz) \u2014 ep\u00e4keskisyyden keskeinen s\u00e4hk\u00f6magneettinen komponentti.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/motor-bar-pass-frequency\/\">roottorisauvan l\u00e4pikulkutaajuus<\/a>:<\/strong> roottorisauvojen lukum\u00e4\u00e4r\u00e4 \u00d7 py\u00f6rimisnopeus, kilohertsialueella.<\/li>\n<\/ul>\n<p>2\u00d7 verkkotaajuuden (120 Hz) ja l\u00e4heisen <a href=\"https:\/\/vibromera.eu\/fi\/glossary\/harmonics\/\">yliaallot<\/a> py\u00f6rimisnopeuden kertaluvun (4. kertaluku on t\u00e4ss\u00e4 noin 117 Hz) l\u00e4heinen v\u00e4li on juuri syy siihen, miksi s\u00e4hk\u00f6magneettiset viat sekoitetaan niin helposti mekaanisiin \u2014 ja miksi hienorakenteinen pole-pass-sivunauhasto, ei pelkk\u00e4 amplitudi, on ratkaiseva vihje. Kun tilanne j\u00e4\u00e4 ep\u00e4selv\u00e4ksi, sy\u00f6t\u00f6n katkaiseminen on lopullinen testi: s\u00e4hk\u00f6magneettinen komponentti katoaa v\u00e4litt\u00f6m\u00e4sti kent\u00e4n mukana, kun taas mekaaninen vaimenee vasta roottorin rullatessa pys\u00e4hdyksiin.<\/p>\n<h2>6. Korjausmenetelm\u00e4t<\/h2>\n<h3>Mekaanisen ep\u00e4keskisyyden vuoksi<\/h3>\n<ul>\n<li>Vaihda kuluneet laakerit roottorin oikean keskityksen palauttamiseksi<\/li>\n<li>Oikaise v\u00e4\u00e4ntynyt akseli tai vaihda roottori.<\/li>\n<li>Asenna roottori takaisin paikalleen, jos vika johtuu asennusvirheest\u00e4.<\/li>\n<li>Tarkista p\u00e4\u00e4tykappaleen kohdistus ja pulttien kiristys.<\/li>\n<\/ul>\n<h3>Valmistuksen ep\u00e4keskisyyden vuoksi<\/h3>\n<ul>\n<li>Vakavissa tapauksissa roottori tai staattori saattaa joutua porattavaksi uudelleen.<\/li>\n<li>Vaihda moottori, jos se on taloudellisesti kannattavaa.<\/li>\n<li>Hyv\u00e4ksy tila, jos t\u00e4rin\u00e4 pysyy sallituissa rajoissa.<\/li>\n<li>Dokumentoi se vertailukohdaksi tulevaa k\u00e4ytt\u00f6\u00e4 varten.<\/li>\n<\/ul>\n<h3>Ilmarakkoon liittyviss\u00e4 ongelmissa<\/h3>\n<ul>\n<li>Tarkista laakerin kunto ja vaihda se, jos se on kulunut.<\/li>\n<li>Tarkista roottorin aksiaalinen sijainti.<\/li>\n<li>Tarkista, onko rungossa v\u00e4\u00e4ntymi\u00e4 tai p\u00e4\u00e4tykappaleissa vikoja.<\/li>\n<li>Mittaa todellinen ilmarako sielt\u00e4, mist\u00e4 se on mitattavissa.<\/li>\n<\/ul>\n<p>Pole pass frequency on yhteenvetona luistoon liittyv\u00e4, moottorikohtainen matalataajuinen komponentti, joka avaa n\u00e4kym\u00e4n roottorin ja staattorin s\u00e4hk\u00f6magneettiseen vuorovaikutukseen sek\u00e4 ilmav\u00e4lin tasaisuuteen. Sen laskennan hallinta, sivunauhasignatuurien tunnistaminen ja niiden amplitudikehityksen tulkinta antavat insin\u00f6\u00f6rille mahdollisuuden diagnosoida s\u00e4hk\u00f6magneettiset viat luotettavasti \u2014 ja kohdistaa kunnossapidon oikeaan paikkaan sen sijaan, ett\u00e4 etsitt\u00e4isiin mekaanista syyt\u00e4, jota ei koskaan ollut.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/fi\/glossary\/\">\u2190 Takaisin p\u00e4\u00e4hakemistoon<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Opi napojen ohitustaajuudesta (PPF), roottorin ja staattorin napojen vuorovaikutuksen synnytt\u00e4m\u00e4st\u00e4 v\u00e4r\u00e4htelytaajuudesta, ilmaraon ep\u00e4keskisyyden diagnostiikasta ja moottoreiden s\u00e4hk\u00f6magneettisista ongelmista.<\/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\/fi\/wp-json\/wp\/v2\/glossary\/197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/197\/revisions"}],"predecessor-version":[{"id":102086,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/glossary\/197\/revisions\/102086"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/media?parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/categories?post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/fi\/wp-json\/wp\/v2\/tags?post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}