{"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\/ro\/glossary\/pole-pass-frequency\/","title":{"rendered":"Ce este frecven\u021ba de trecere a polului? For\u021bele electromagnetice ale motorului"},"content":{"rendered":"<h1>\u00cen\u021belegerea frecven\u021bei de trecere a polului<\/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\/ro\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii 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 kit complet \u2014 echilibrator portabil \u0219i analizor de vibra\u021bii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii Balanset-1A\">Echilibrator portabil \u0219i analizor de vibra\u021bii 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Portable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201ePortable balancer &amp; Vibration analyzer Balanset-1A\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">\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=\"Prim-plan senzor de vibra\u021bii Balanset-1A\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">Senzor de vibra\u021bii<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Vibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201eVibration sensor\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">\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=\"Senzor optic (tahometru cu laser)\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">Senzor optic (tahometru cu laser)<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Optical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201eOptical Sensor (Laser Tachometer)\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/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=\"Kit de echilibrare a rotorului Vibromera: geant\u0103 de transport, condi\u021bioner de semnal multicanal, analizor portabil, baz\u0103 magnetic\u0103, senzori de vibra\u021bii \u0219i cabluri spiralate.\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Balanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201eBalanset-4\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic 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=\"Baza magnetic\u0103.\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic Insize-60-kgf\">Stand magnetic 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Magnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201eMagnetic Stand Insize-60-kgf\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">\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=\"Band\u0103 reflectorizant\u0103\" 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">Band\u0103 reflectorizant\u0103<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Reflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201eReflective tape\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &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=\"Con\u021binutul kitului Balanset-1A cu unitate de interfa\u021b\u0103, senzori, tahometru \u0219i accesorii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &quot;Balanset-1A&quot; OEM\">Echilibrator dinamic \"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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Dynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201eDynamic balancer \u201cBalanset-1A\u201d OEM\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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>Frecven\u021ba de trecere a polului<\/strong> (PPF) este componenta de joas\u0103 frecven\u021b\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration\/\">vibra\u021bii<\/a> generat\u0103 \u00eentr-un motor asincron de curent alternativ atunci c\u00e2nd c\u00e2mpul magnetic rotativ alunec\u0103 pe l\u00e2ng\u0103 rotor. Se calculeaz\u0103 ca num\u0103rul de poli \u00eenmul\u021bit cu <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/slip-frequency\/\">frecven\u021ba de alunecare<\/a>: PPF = num\u0103rul de poli \u00d7 (viteza sincron\u0103 \u2212 viteza real\u0103) \/ 60. Deoarece alunecarea este mic\u0103, PPF este o frecven\u021b\u0103 foarte joas\u0103 \u2014 de obicei doar c\u00e2\u021biva hertzi \u2014 \u0219i de regul\u0103 apare nu ca un v\u00e2rf izolat, ci ca <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/sidebands\/\">benzi laterale<\/a> spa\u021biate la PPF \u00een jurul componentelor de vitez\u0103 de func\u021bionare \u0219i frecven\u021b\u0103 de linie. Acea modula\u021bie legat\u0103 de alunecare este amplificat\u0103 puternic atunci c\u00e2nd motorul are <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/air-gap\/\">\u00eentrefier<\/a> excentricitate, bare de rotor rupte sau o problem\u0103 de aliniere rotor-stator. Din acest motiv, PPF este unul dintre cele mai utile instrumente pentru separarea <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/electrical-faults\/\">defec\u021biuni electrice<\/a> de cele pur mecanice.<\/p>\n<p>PPF este important din punct de vedere diagnostic deoarece niveluri ridicate ale <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/sidebands\/\">benzi laterale<\/a> spa\u021biate la aceast\u0103 frecven\u021b\u0103 indic\u0103 clar o problem\u0103 electromagnetic\u0103 \u2014 un rotor excentric, bare de rotor rupte, un \u00eentrefier neuniform sau o interac\u021biune dinamic\u0103 rotor\u2013stator \u2014 mai degrab\u0103 dec\u00e2t <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> sau <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/misalignment\/\">nealiniere<\/a>. Dac\u0103 este citit corect, acesta \u00eei indic\u0103 analistului dac\u0103 trebuie s\u0103 deschid\u0103 motorul sau s\u0103 verifice alt\u0103 parte a trenului.<\/p>\n<h2>1. Calcularea frecven\u021bei de trecere prin pol<\/h2>\n<h3>Formula de baz\u0103<\/h3>\n<ul>\n<li><strong>PPF = P \u00d7 (N<sub>sincron<\/sub> \u2212 N) \/ 60<\/strong><\/li>\n<li>unde <strong>P<\/strong> = num\u0103rul de poli,<\/li>\n<li><strong>N<sub>sincron<\/sub><\/strong> = viteza sincron\u0103 \u00een RPM (N<sub>sincron<\/sub> = 120 \u00d7 frecven\u021ba re\u021belei \/ P),<\/li>\n<li><strong>N<\/strong> = viteza real\u0103 a rotorului \u00een rota\u021bii pe minut,<\/li>\n<li>iar rezultatul este \u00een Hz. Termenul (N<sub>sincron<\/sub> \u2212 N) \/ 60 este frecven\u021ba de alunecare exprimat\u0103 \u00een Hz.<\/li>\n<\/ul>\n<p>Re\u021bine\u021bi c\u0103 PPF se bazeaz\u0103 pe <em>difference<\/em> dintre viteza sincron\u0103 \u0219i cea real\u0103 \u2014 alunecarea <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/slip-frequency\/\">alunecare<\/a>. La mersul \u00een gol, un motor asincron func\u021bioneaz\u0103 aproape la viteza sincron\u0103, astfel \u00eenc\u00e2t PPF tinde spre zero; pe m\u0103sur\u0103 ce sarcina cre\u0219te, alunecarea \u0219i deci PPF cresc odat\u0103 cu ea, ajung\u00e2nd de obicei \u00een intervalul de aproximativ 0.5\u20133.5 Hz la sarcina nominal\u0103. Nu confunda\u021bi PPF cu ordinul pur mecanic P \u00d7 viteza de func\u021bionare (pentru un motor cu 4 poli la 1750 RPM aceasta este circa 116.7 Hz) \u2014 acesta este un armonic al rota\u021biei arborelui, nu frecven\u021ba de trecere a polilor. C\u00e2nd trebuie s\u0103 converti\u021bi rapid viteza de func\u021bionare \u00eentr-o familie de ordine, instrumentul nostru <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/harmonic-frequency-calculator\/\">Calculator de frecven\u021b\u0103 armonic\u0103<\/a> converte\u0219te tura\u021bia (RPM) \u00een hertz (Hz) pentru ordinele 1\u00d7\u201310\u00d7, iar <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/motor-electrical-frequencies\/\">Calculator de frecven\u021b\u0103 a defectelor electrice ale motorului<\/a> prezint\u0103 frecven\u021bele electromagnetice una l\u00e2ng\u0103 alta.<\/p>\n<h3>Exemple rezolvate<\/h3>\n<p><strong>Motor cu 4 poli la 1750 rpm (alimentare la 60 Hz):<\/strong><\/p>\n<ul>\n<li>Viteza sincron\u0103 N<sub>sincron<\/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>\u00cen spectrul de vibra\u021bii <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/spectrum\/\">spectru<\/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>Motor cu 6 poli la 970 rpm (alimentare la 50 Hz):<\/strong><\/p>\n<ul>\n<li>Viteza sincron\u0103 N<sub>sincron<\/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>Rezolvarea lor necesit\u0103 o analiz\u0103 atent\u0103, de \u00eenalt\u0103 rezolu\u021bie, <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/spectral-analysis\/\">analiz\u0103 spectral\u0103<\/a>.<\/li>\n<\/ul>\n<h2>2. Mecanismul fizic<\/h2>\n<h3>Cum se genereaz\u0103 for\u021ba electromagnetic\u0103<\/h3>\n<p>Lan\u021bul de evenimente care duce la formarea PPF este simplu:<\/p>\n<ol>\n<li>\u00cenf\u0103\u0219ur\u0103rile statorului genereaz\u0103 un c\u00e2mp magnetic care se rote\u0219te cu viteza sincron\u0103.<\/li>\n<li>C\u00e2mpul respectiv este organizat \u00een poli magnetici, urm\u00e2nd un model N\u2013S\u2013N\u2013S.<\/li>\n<li>Rotorul func\u021bioneaz\u0103 u\u0219or mai lent din cauza alunec\u0103rii, astfel \u00eenc\u00e2t polii c\u00e2mpului trec continuu pe l\u00e2ng\u0103 rotor \u00een loc s\u0103 r\u0103m\u00e2n\u0103 bloca\u021bi fa\u021b\u0103 de acesta.<\/li>\n<li>De fiecare dat\u0103 c\u00e2nd un pol al c\u00e2mpului trece pe l\u00e2ng\u0103 un anumit punct de pe rotor (o bar\u0103 cu rezisten\u021b\u0103 mare, o parte excentric\u0103 a \u00eentrefierului), for\u021ba magnetic\u0103 care ac\u021bioneaz\u0103 asupra acelui punct este modulat\u0103.<\/li>\n<li>With <strong>P<\/strong> poli, acel punct este traversat <strong>P<\/strong> ori pe ciclu de alunecare.<\/li>\n<li>Frecven\u021ba modula\u021biei rezultate este, prin urmare, P \u00d7 frecven\u021ba de alunecare = PPF \u2014 un \u201ebeat\u201d lent superpus peste vibra\u021bia la viteza de func\u021bionare \u0219i la frecven\u021ba de linie.<\/li>\n<\/ol>\n<h3>Entrefer uniform \u2014 un motor \u00een stare bun\u0103<\/h3>\n<ul>\n<li>Rotorul este centrat \u00een orificiul statorului.<\/li>\n<li>Spa\u021biul de aer este uniform pe \u00eentreaga circumferin\u021b\u0103.<\/li>\n<li>For\u021bele magnetice sunt echilibrate \u0219i se anuleaz\u0103 reciproc.<\/li>\n<li>Prin urmare, modula\u021bia legat\u0103 de PPF are o amplitudine foarte mic\u0103.<\/li>\n<\/ul>\n<h3>Entrefer excentric \u2014 motor defect<\/h3>\n<ul>\n<li>Rotorul este decalat fa\u021b\u0103 de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bearing-wear\/\">uzura rulmen\u021bilor<\/a>, a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bent-shaft\/\">arbore \u00eendoit<\/a>, sau o eroare de fabrica\u021bie.<\/li>\n<li>Spa\u021biul de aer este mai mic pe o parte \u0219i mai mare pe partea opus\u0103.<\/li>\n<li>For\u021bele magnetice se dezechilibreaz\u0103 \u2014 fiind mai puternice acolo unde spa\u021biul este mai mic.<\/li>\n<li>Apare o for\u021b\u0103 radial\u0103 net\u0103 \u2014 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/magnetic-pull\/\">trac\u021biune magnetic\u0103 dezechilibrat\u0103<\/a> \u2014 iar aceasta este modulat\u0103 la PPF pe m\u0103sur\u0103 ce polii c\u00e2mpului trec pe l\u00e2ng\u0103 partea \u00eengust\u0103 a \u00eentrefierului.<\/li>\n<li>Se dezvolt\u0103 benzi laterale spa\u021biate la PPF \u00een jurul v\u00e2rfurilor spectrale principale, iar acestea cresc odat\u0103 cu severitatea.<\/li>\n<\/ul>\n<h2>3. Benzi laterale \u0219i modele de diagnostic<\/h2>\n<h3>Excentricitate static\u0103<\/h3>\n<p>\u00cen acest caz, centrul rotorului este decalat, dar sta\u021bionar \u00een raport cu statorul:<\/p>\n<ul>\n<li><strong>Model:<\/strong> o component\u0103 ridicat\u0103 la 2\u00d7 frecven\u021ba re\u021belei (100\/120 Hz); benzile laterale de trecere a polilor sunt slabe sau absente deoarece decalajul nu se rote\u0219te odat\u0103 cu arborele.<\/li>\n<li><strong>Cauza:<\/strong> uzura rulmen\u021bilor, deformarea cadrului sau a scutului de cap\u0103t ori o eroare de prelucrare a alezajului statorului.<\/li>\n<li><strong>Amplitudine:<\/strong> amplitudinea la 2\u00d7 frecven\u021ba re\u021belei indic\u0103 severitatea excentricit\u0103\u021bii.<\/li>\n<\/ul>\n<h3>Excentricitate dinamic\u0103<\/h3>\n<p>Aici, centrul rotorului orbiteaz\u0103 sau se \u00eenv\u00e2rte \u00een jurul centrului statorului:<\/p>\n<ul>\n<li><strong>Model:<\/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>Cauze:<\/strong> un arbore \u00eendoit, rotor <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-eccentricity\/\">excentricitate<\/a>, rotor-stator <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor-rub\/\">rub<\/a> or bearing <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/looseness\/\">joc axial<\/a>.<\/li>\n<li><strong>More severe:<\/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>Excentricitate mixt\u0103<\/h3>\n<ul>\n<li>O combina\u021bie de efecte statice \u0219i dinamice.<\/li>\n<li>Aceasta este starea cea mai frecvent\u0103 \u00eent\u00e2lnit\u0103 la motoarele reale.<\/li>\n<li>Produce modele complexe de benzi laterale.<\/li>\n<li>Este necesar\u0103 o analiz\u0103 atent\u0103 pentru a o interpreta corect.<\/li>\n<\/ul>\n<h2>4. Interpretarea rezultatelor diagnostice<\/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>Sc\u0103zut \u2014 benzile laterale de trecere a polilor abia se v\u0103d deasupra nivelului de zgomot<\/h3>\n<ul>\n<li>O stare normal\u0103.<\/li>\n<li>Un spa\u021biu de aer uniform \u0219i o concentricitate bun\u0103 \u00eentre rotor \u0219i stator.<\/li>\n<li>Nu sunt necesare m\u0103suri corective.<\/li>\n<\/ul>\n<h3>Moderat \u2014 benzile laterale sunt clar vizibile, dar mult sub v\u00e2rful purt\u0103tor<\/h3>\n<ul>\n<li>U\u0219oar\u0103 neuniformitate a \u00eentrefierului sau degradare incipient\u0103 a circuitului rotorului.<\/li>\n<li>Urm\u0103ri\u021bi evolu\u021bia \u0219i verifica\u021bi starea rulmentului.<\/li>\n<li>Verifica\u021bi pozi\u021bia rotorului, dac\u0103 acesta este accesibil.<\/li>\n<li>Nu este o problem\u0103 urgent\u0103, dar merit\u0103 aten\u021bie.<\/li>\n<\/ul>\n<h3>Ridicat \u2014 benzile laterale se apropie de v\u00e2rful purt\u0103tor ca amplitudine<\/h3>\n<ul>\n<li>Excentricitate semnificativ\u0103, bare de rotor rupte sau o problem\u0103 a \u00eentrefierului.<\/li>\n<li>Se poate sim\u021bi sau auzi un \u201ebeat\u201d pronun\u021bat de joas\u0103 frecven\u021b\u0103 la PPF.<\/li>\n<li>Exist\u0103 riscul de contact \u00eentre rotor \u0219i stator.<\/li>\n<li>Cre\u0219terea for\u021belor electromagnetice care accelereaz\u0103 deteriorarea.<\/li>\n<li>Planifica\u021bi repararea sau \u00eenlocuirea.<\/li>\n<\/ul>\n<p>\u00cen practic\u0103, analistul rareori evalueaz\u0103 PPF-ul separat. Un analizor portabil cu dou\u0103 canale, cum ar fi <a href=\"https:\/\/vibromera.eu\/ro\/produs\/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\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> pute\u021bi corecta prin <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrarea-campului\/\">echilibrarea la fa\u021ba locului<\/a> rotorul \u00een pozi\u021bie.<\/p>\n<h2>5. Rela\u021bia cu alte frecven\u021be motorii<\/h2>\n<p>PPF reprezint\u0103 o singur\u0103 nuan\u021b\u0103 \u00eentr-un spectru aglomerat de motoare, iar identificarea pozi\u021biei sale \u00een raport cu vecinii s\u0103i reprezint\u0103 jum\u0103tate din efort. O ierarhie tipic\u0103 pentru un motor cu 4 poli, de 1750 rpm, alimentat la 60 Hz este:<\/p>\n<ul>\n<li><strong>Frecven\u021ba de alunecare:<\/strong> (1800 \u2212 1750) \/ 60 \u2248 0.83 Hz.<\/li>\n<li><strong>PPF:<\/strong> P \u00d7 frecven\u021ba de alunecare \u2014 aici aproximativ 3.3 Hz, tonul cel mai jos din familie.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/running-speed\/\">Running speed<\/a> (1\u00d7):<\/strong> about 29.2 Hz.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/electrical-frequency\/\">Frecven\u021ba liniei<\/a>:<\/strong> 60 Hz (sau 50 Hz \u00een Europa).<\/li>\n<li><strong>Ordinul mecanic al rotorului P \u00d7 viteza de func\u021bionare:<\/strong> aproximativ 117 Hz \u2014 adesea confundat cu PPF, dar este un armonic al vitezei arborelui.<\/li>\n<li><strong>De dou\u0103 ori frecven\u021ba de re\u021bea:<\/strong> 120 Hz (sau 100 Hz) \u2014 componenta electromagnetic\u0103 cheie pentru excentricitate.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/motor-bar-pass-frequency\/\">Frecven\u021ba de trecere a barei rotorului<\/a>:<\/strong> num\u0103rul de bare ale rotorului \u00d7 viteza de func\u021bionare, \u00een domeniul kilohertzilor.<\/li>\n<\/ul>\n<p>Spa\u021bierea mic\u0103 dintre 2\u00d7 frecven\u021ba re\u021belei (120 Hz) \u0219i ordinul apropiat <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/harmonics\/\">armonice<\/a> al vitezei de func\u021bionare (ordinul 4 este aici la aproximativ 117 Hz) este exact motivul pentru care defectele electromagnetice sunt at\u00e2t de u\u0219or confundate cu cele mecanice \u2014 iar structura fin\u0103 a benzilor laterale de trecere a polilor, nu doar amplitudinea, este indiciul decisiv. Acolo unde imaginea r\u0103m\u00e2ne ambigu\u0103, oprirea aliment\u0103rii este testul definitiv: o component\u0103 electromagnetic\u0103 dispare instantaneu odat\u0103 cu c\u00e2mpul, \u00een timp ce una mecanic\u0103 scade doar pe m\u0103sur\u0103 ce rotorul se opre\u0219te din iner\u021bie.<\/p>\n<h2>6. Metode de corectare<\/h2>\n<h3>Pentru excentricitatea mecanic\u0103<\/h3>\n<ul>\n<li>\u00cenlocui\u021bi rulmen\u021bii uza\u021bi pentru a restabili centrarea corect\u0103 a rotorului<\/li>\n<li>\u00cendrepta\u021bi arborele \u00eendoit sau \u00eenlocui\u021bi rotorul.<\/li>\n<li>Remonta\u021bi rotorul dac\u0103 defec\u021biunea este cauzat\u0103 de o eroare de instalare.<\/li>\n<li>Verifica\u021bi alinierea scuturilor de cap\u0103t \u0219i str\u00e2ngerea \u0219uruburilor.<\/li>\n<\/ul>\n<h3>Pentru excentricitatea de fabrica\u021bie<\/h3>\n<ul>\n<li>\u00cen cazurile grave, poate fi necesar\u0103 refacerea orificiilor rotorului sau statorului.<\/li>\n<li>\u00cenlocui\u021bi motorul acolo unde acest lucru se justific\u0103 din punct de vedere economic.<\/li>\n<li>Accepta\u021bi condi\u021bia dac\u0103 vibra\u021biile se men\u021bin \u00een limite acceptabile.<\/li>\n<li>\u00cenregistra\u021bi aceste date ca punct de referin\u021b\u0103 pentru compara\u021bii ulterioare.<\/li>\n<\/ul>\n<h3>\u00cen ceea ce prive\u0219te problemele legate de spa\u021biul de aer<\/h3>\n<ul>\n<li>Verifica\u021bi starea rulmentului \u0219i \u00eenlocui\u021bi-l dac\u0103 este uzat.<\/li>\n<li>Verifica\u021bi pozi\u021bia axial\u0103 a rotorului.<\/li>\n<li>Verifica\u021bi dac\u0103 exist\u0103 deform\u0103ri ale cadrului sau probleme la scuturile (capacele de cap\u0103t) ale motorului.<\/li>\n<li>M\u0103sura\u021bi \u00eentrefierul real (spa\u021biul de aer) acolo unde este accesibil.<\/li>\n<\/ul>\n<p>Frecven\u021ba de trecere a polilor este, pe scurt, o component\u0103 de joas\u0103 frecven\u021b\u0103 specific\u0103 motorului, legat\u0103 de alunecare, care deschide o fereastr\u0103 c\u0103tre interac\u021biunea electromagnetic\u0103 rotor\u2013stator \u0219i uniformitatea \u00eentrefierului. St\u0103p\u00e2nirea calculului ei, recunoa\u0219terea semn\u0103turilor sale de benzi laterale \u0219i interpretarea tendin\u021belor de amplitudine \u00eei permit unui inginer s\u0103 diagnosticheze cu \u00eencredere defectele electromagnetice \u2014 \u0219i s\u0103 direc\u021bioneze efortul de mentenan\u021b\u0103 \u00een locul corect, \u00een loc s\u0103 urm\u0103reasc\u0103 o cauz\u0103 mecanic\u0103 care nu a existat niciodat\u0103.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/\">\u2190 \u00cenapoi la indexul principal<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Afla\u021bi despre frecven\u021ba de trecere a polilor (PPF), frecven\u021ba vibra\u021biilor generat\u0103 de interac\u021biunea rotorului cu polii statorului, diagnosticarea excentricit\u0103\u021bii \u00eentrefierului \u0219i problemele electromagnetice ale motoarelor.<\/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\/ro\/wp-json\/wp\/v2\/glossary\/197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/197\/revisions"}],"predecessor-version":[{"id":102086,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/197\/revisions\/102086"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}