{"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\/sw\/glossary\/pole-pass-frequency\/","title":{"rendered":"Pole Pass Frequency ni Nini? Vikosi vya Umeme vya Motor"},"content":{"rendered":"<h1>Kuelewa Pole Pass Frequency<\/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\/sw\/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\/sw\/product\/balanset-1\/\" title=\"Kisawazisha kinachobebeka na kichanganuzi cha Mtetemo 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 kizani kamili kinachobebeka na mchanganyzaji wa mipigo\" 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\/sw\/product-category\/devices\/\" rel=\"tag\">Vifaa<\/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\/sw\/product\/balanset-1\/\" title=\"Kisawazisha kinachobebeka na kichanganuzi cha Mtetemo Balanset-1A\">Kisawazisha kinachobebeka na kichanganuzi cha Mtetemo 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> + VAT (ikiwa inatumika)<\/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=\"\/sw\/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=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" 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=\"\/sw\/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=\"Add to cart: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/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\/sw\/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\/sw\/product\/vibration-sensor\/\" title=\"Sensor ya mtetemo\">\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=\"Kiazo cha kumkaribisha cha mipigo ya 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\/sw\/product-category\/parts\/\" rel=\"tag\">Sehemu<\/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\/sw\/product\/vibration-sensor\/\" title=\"Sensor ya mtetemo\">Sensor ya mtetemo<\/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> + VAT (ikiwa inatumika)<\/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=\"\/sw\/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=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" 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=\"\/sw\/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=\"Add to cart: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/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\/sw\/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\/sw\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Sensorer ya Macho (Tachometer ya 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=\"Sensorer ya Macho (Tachometer ya 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\/sw\/product-category\/parts\/\" rel=\"tag\">Sehemu<\/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\/sw\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Sensorer ya Macho (Tachometer ya Laser)\">Sensorer ya Macho (Tachometer ya 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> + VAT (ikiwa inatumika)<\/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=\"\/sw\/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=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" 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=\"\/sw\/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=\"Add to cart: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/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\/sw\/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\/sw\/product\/balanset-4\/\" title=\"Balancet-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=\"Seti ya Vibromera ya uzani wa rotor: sanduku la kuendelea, mhuduma wa ishara ya njia nyingi, mchanganyaji wa kubaini, msingi wa sumaku, senseti za mipigo, na kebo zilizopindika.\" 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\/sw\/product-category\/devices\/\" rel=\"tag\">Vifaa<\/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\/sw\/product\/balanset-4\/\" title=\"Balancet-4\">Balancet-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> + VAT (ikiwa inatumika)<\/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=\"\/sw\/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=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" 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=\"\/sw\/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=\"Add to cart: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/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\/sw\/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\/sw\/product\/magnet-stand\/\" title=\"Stand ya 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=\"Msingi wa sumaku.\" 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\/sw\/product-category\/parts\/\" 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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>Pole pass frequency<\/strong> (PPF) is the low-frequency <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/vibration\/\">vibration<\/a> component generated in an AC induction motor as the rotating magnetic field slips past the rotor. It is calculated as the number of poles multiplied by the <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/slip-frequency\/\">slip frequency<\/a>: PPF = number of poles \u00d7 (synchronous speed \u2212 actual speed) \/ 60. Because slip is small, PPF is a very low frequency \u2014 typically only a few hertz \u2014 and it usually shows up not as a stand-alone peak but as <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/sidebands\/\">sidebands<\/a> spaced at PPF around the running-speed and line-frequency components. That slip-related modulation is greatly amplified when the motor has <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/air-gap\/\">air-gap<\/a> eccentricity, broken rotor bars, or a rotor-to-stator alignment problem. Because of this, PPF is one of the most useful tools for separating <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/electrical-faults\/\">hitilafu za umeme<\/a> kutoka kwa zile halisi za mitambo.<\/p>\n<p>PPF matters diagnostically because elevated <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/sidebands\/\">sidebands<\/a> spaced at this frequency point squarely at an electromagnetic problem \u2014 an eccentric rotor, broken rotor bars, a non-uniform air gap, or dynamic rotor\u2013stator interaction \u2014 rather than at <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/unbalance\/\">unbalance<\/a> or <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/misalignment\/\">misalignment<\/a>. Ikiwa kusoma kwa kaida, inagambia mchambuzi ikiwa anafungua motor au anatazama mahali pengine kwenye treni.<\/p>\n<h2>1. Kuhesabu Pole Pass Frequency<\/h2>\n<h3>Fomula ya msingi<\/h3>\n<ul>\n<li><strong>PPF = P \u00d7 (N<sub>sync<\/sub> \u2212 N) \/ 60<\/strong><\/li>\n<li>where <strong>P<\/strong> = idadi ya poles,<\/li>\n<li><strong>N<sub>sync<\/sub><\/strong> = synchronous speed in RPM (N<sub>sync<\/sub> = 120 \u00d7 line frequency \/ P),<\/li>\n<li><strong>N<\/strong> = kasi halisi ya rotor katika RPM,<\/li>\n<li>and the result is in Hz. The term (N<sub>sync<\/sub> \u2212 N) \/ 60 is the slip frequency expressed in Hz.<\/li>\n<\/ul>\n<p>Note that PPF is built on the <em>difference<\/em> between synchronous and actual speed \u2014 the <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/slip-frequency\/\">slip<\/a>. At no load an induction motor runs almost at synchronous speed, so PPF approaches zero; as load grows, slip and therefore PPF grow with it, typically ending up in the range of roughly 0.5\u20133.5 Hz at rated load. Do not confuse PPF with the purely mechanical order P \u00d7 running speed (for a 4-pole motor at 1750 RPM that is about 116.7 Hz) \u2014 that is a harmonic of shaft rotation, not pole pass frequency. When you need to convert running speed into a family of orders quickly, our <a href=\"https:\/\/vibromera.eu\/sw\/calculators\/harmonic-frequency-calculator\/\">Kihesabu cha Mzunguko wa Harmoniki<\/a> turns RPM into Hz across the 1\u00d7\u201310\u00d7 orders, and the <a href=\"https:\/\/vibromera.eu\/sw\/calculators\/motor-electrical-frequencies\/\">Motor Electrical Defect Frequency Calculator<\/a> inaonyesha frequencies za umeme karibu.<\/p>\n<h3>Mifano iliyotumika<\/h3>\n<p><strong>Motoo ya 4-pole katika 1750 RPM (usambazaji wa 60 Hz):<\/strong><\/p>\n<ul>\n<li>Synchronous speed 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>In the vibration <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/spectrum\/\">spectrum<\/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>Motri ya pole 6 kwa 970 RPM (usambazaji wa 50 Hz):<\/strong><\/p>\n<ul>\n<li>Synchronous speed 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>Resolving them demands careful, high-resolution <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/spectral-analysis\/\">uchambuzi wa mawimbi<\/a>.<\/li>\n<\/ul>\n<h2>2. Utendaji wa Kimwili<\/h2>\n<h3>Jinsi nguvu ya umeme inavyozaliwa<\/h3>\n<p>Mlolongo wa matukio ambayo huzalisha PPF ni rahisi:<\/p>\n<ol>\n<li>Windings za stator huzalisha uwanja wa magnetic unao zunguka kwa kasi ya synchronous.<\/li>\n<li>Uwanja huo unakuwa sehemu katika poles ya magnetic katika muundo wa N\u2013S\u2013N\u2013S.<\/li>\n<li>The rotor runs slightly slower because of slip, so the field poles continuously drift past the rotor rather than staying locked to it.<\/li>\n<li>Each time a field pole slips past a given spot on the rotor (a high-resistance bar, an eccentric side of the air gap), the magnetic force acting on that spot is modulated.<\/li>\n<li>With <strong>P<\/strong> poles, that spot is passed <strong>P<\/strong> times per slip cycle.<\/li>\n<li>The frequency of the resulting modulation is therefore P \u00d7 slip frequency = PPF \u2014 a slow &#8220;beating&#8221; superimposed on the running-speed and line-frequency vibration.<\/li>\n<\/ol>\n<h3>Pengo la hewa la kwa kutosha \u2014 motri ya kawaida<\/h3>\n<ul>\n<li>Rotor iko katikati ya bure la stator.<\/li>\n<li>Pengo la hewa ni sawa kuzunguka kwa mzunguko kamili.<\/li>\n<li>Nguvu za magnetic zimebadilishwa na kurudia kila mmoja.<\/li>\n<li>PPF-related modulation is consequently very low in amplitude.<\/li>\n<\/ul>\n<h3>Pengo la hewa lisilo sawa \u2014 motri yenye kasoro<\/h3>\n<ul>\n<li>Rotor inakaa mbali na katikati kutoka <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/bearing-wear\/\">bearing wear<\/a>, a <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/bent-shaft\/\">bent shaft<\/a>, au kosa la uzalishaji.<\/li>\n<li>Pengo la hewa ni ndogo upande mmoja na kubwa upande wa kinyume.<\/li>\n<li>Nguvu za sumaku zinakuwa na usawa \u2014 nguvu kubwa pale pengo linavyokuwa ndogo.<\/li>\n<li>A net radial force appears \u2014 <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/magnetic-pull\/\">mvutano wa sumaku usio na usawa<\/a> \u2014 and it is modulated at PPF as the field poles slip past the narrow side of the gap.<\/li>\n<li>Sidebands spaced at PPF develop around the main spectral peaks and grow with severity.<\/li>\n<\/ul>\n<h2>3. Sidebands na Mifumo ya Tanisisi<\/h2>\n<h3>Usawa wa tuli<\/h3>\n<p>Hapa kituo cha rotor kipo kwa mbali lakini tuli jamaa na stator:<\/p>\n<ul>\n<li><strong>Pattern:<\/strong> an elevated 2\u00d7 line frequency component (100\/120 Hz); pole-pass sidebands are weak or absent because the offset does not rotate with the shaft.<\/li>\n<li><strong>Cause:<\/strong> bearing wear, frame or end-bell distortion, or a machining error in the stator bore.<\/li>\n<li><strong>Amplitude:<\/strong> the 2\u00d7 line frequency amplitude indicates the severity of the eccentricity.<\/li>\n<\/ul>\n<h3>Usawa wa kinamic<\/h3>\n<p>Hapa kituo cha rotor kinazunguka, au kugeuka, kuzunguka kituo cha stator:<\/p>\n<ul>\n<li><strong>Pattern:<\/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>Causes:<\/strong> a bent shaft, rotor <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/rotor-eccentricity\/\">eccentricity<\/a>, rotor-to-stator <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/rotor-rub\/\">rub<\/a> or bearing <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/looseness\/\">looseness<\/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>Usawa wa mchanganyiko<\/h3>\n<ul>\n<li>Mchanganyiko wa athari za tuli na kinamic.<\/li>\n<li>Hii ndio hali ya kawaida inayopatikana katika motors halisi.<\/li>\n<li>Inatoa mifumo changamano ya sideband.<\/li>\n<li>Uchambuzi makini unahitajika ili kuiinterpretia kwa usahihi.<\/li>\n<\/ul>\n<h2>4. Tafsiri ya Uchunguzi<\/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>Low \u2014 pole-pass sidebands barely visible above the noise floor<\/h3>\n<ul>\n<li>Hali ya kawaida.<\/li>\n<li>Pengo la hewa sare na concentricity nzuri ya rotor\u2013stator.<\/li>\n<li>Hakuna hatua ya kurekebisha inayohitajika.<\/li>\n<\/ul>\n<h3>Moderate \u2014 sidebands clearly visible but far below the carrier peak<\/h3>\n<ul>\n<li>Slight air-gap non-uniformity or early rotor-circuit degradation.<\/li>\n<li>Fanya mwendo wa kufuatilia na angalia hali ya kuzaa.<\/li>\n<li>Thibitisha nafasi ya rotor ikiwa inaweza kufikiwa.<\/li>\n<li>Sio muhimu mara moja, lakini inahitaji tahadhari.<\/li>\n<\/ul>\n<h3>High \u2014 sidebands approaching the carrier peak in amplitude<\/h3>\n<ul>\n<li>Significant eccentricity, broken rotor bars, or an air-gap problem.<\/li>\n<li>A pronounced low-frequency &#8220;beat&#8221; may be felt or heard at PPF.<\/li>\n<li>Hatari ya kuwasiliana kwa rotor-to-stator.<\/li>\n<li>Nguvu za umeme zinazokua zinazoacheleza uharibifu.<\/li>\n<li>Panga ukamataji au kubadilisha.<\/li>\n<\/ul>\n<p>Katika mazoezi, mchambuzi anakamatia PPF mara chache peke yake. Analyser ya kubebwa ya chaneli mbili kama vile <a href=\"https:\/\/vibromera.eu\/sw\/bidhaa\/balanset-1\/\">Balancet-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\/sw\/glossary\/unbalance\/\">unbalance<\/a> unaweza kusahihisha kwa <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/field-balancing\/\">field balancing<\/a> rotor inayofanya kazi vizuri.<\/p>\n<h2>5. Uhusiano na Masafa Mengine ya Kinyumba<\/h2>\n<p>PPF ni saba moja katika sauti nyingi za kinyumba, na kutambua mahali inapokaa kwa heshima na jirani zake ni nusu ya mapigania. Muundo wa kawaida kwa kinyumba cha polisi 4, 1750 RPM kwenye usambazaji wa 60 Hz ni:<\/p>\n<ul>\n<li><strong>Msaba wa kuteleza:<\/strong> (1800 \u2212 1750) \/ 60 \u2248 0.83 Hz.<\/li>\n<li><strong>PPF:<\/strong> P \u00d7 slip frequency \u2014 about 3.3 Hz here, the lowest tone in the family.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/sw\/glossary\/running-speed\/\">Running speed<\/a> (1\u00d7):<\/strong> about 29.2 Hz.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/sw\/glossary\/electrical-frequency\/\">Line frequency<\/a>:<\/strong> 60 Hz (or 50 Hz in Europe).<\/li>\n<li><strong>Rotor mechanical order P \u00d7 running speed:<\/strong> about 117 Hz \u2014 often mistaken for PPF, but it is a shaft-speed harmonic.<\/li>\n<li><strong>2\u00d7 msaba wa mstari:<\/strong> 120 Hz (or 100 Hz) \u2014 the key electromagnetic component for eccentricity.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/sw\/glossary\/motor-bar-pass-frequency\/\">Msaba wa upakaji wa rotor<\/a>:<\/strong> number of rotor bars \u00d7 running speed, up in the kilohertz range.<\/li>\n<\/ul>\n<p>The close spacing of 2\u00d7 line frequency (120 Hz) and the nearby <a href=\"https:\/\/vibromera.eu\/sw\/glossary\/harmonics\/\">harmonics<\/a> of running speed (the 4th order sits at about 117 Hz here) is exactly why electromagnetic faults are so easily confused with mechanical ones \u2014 and why the fine pole-pass sideband structure, not amplitude alone, is the deciding clue. Where the picture remains ambiguous, switching off the supply is the definitive test: an electromagnetic component vanishes instantly with the field, whereas a mechanical one decays only as the rotor coasts down.<\/p>\n<h2>6. Njia za Marekebisho<\/h2>\n<h3>Kwa kubadilika kwa mitambo<\/h3>\n<ul>\n<li>Badilisha njia mlipukaji iliyochakaa ili kurudisha kuzunguka kwa rotor vizuri.<\/li>\n<li>Sahihisha shimoni iliyonyanyuka au badilisha rotor.<\/li>\n<li>Tengeza upya rotor ikiwa hitilafu ni kosa la kuakisi.<\/li>\n<li>Thibitisha umiliki wa ncha-kengele na upigaji wa bolt.<\/li>\n<\/ul>\n<h3>Kwa kubadilika kwa utengenezaji<\/h3>\n<ul>\n<li>Vitendo vilivyosumbuwa mara nyingi vinaweza kuhitaji kurudisha kuborea rotor au stator.<\/li>\n<li>Badilisha kinyumba ambapo hiyo ina heshima ya kiuchumi.<\/li>\n<li>Kukubali hali hiyo ikiwa mitambo inabaki ndani ya mipango inakamatia.<\/li>\n<li>Dokeza kama kiwango cha kulinganisha katika siku zijazo.<\/li>\n<\/ul>\n<h3>Kwa ajili ya matatizo ya pengo la hewa<\/h3>\n<ul>\n<li>Angalia hali ya chombo na ubadilishe ikiwa kimezaa.<\/li>\n<li>Hakiki msomeko wa rotor katika mwelekeo wa axial.<\/li>\n<li>Chagua sura ya pembetatu au matatizo ya kengele ya mwisho.<\/li>\n<li>Pima pengo la hewa halisi mahali ambapo linaweza kufikia.<\/li>\n<\/ul>\n<p>Pole pass frequency is, in summary, a slip-related, motor-specific low-frequency component that opens a window onto rotor\u2013stator electromagnetic interaction and air-gap uniformity. Mastering its calculation, recognising its sideband signatures, and reading their amplitude trends lets an engineer diagnose electromagnetic faults with confidence \u2014 and direct maintenance effort to the right place instead of chasing a mechanical cause that was never there.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/sw\/glossary\/\">\u2190 Rudi kwenye Index ya Msingi<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Jifunza kuhusu mzunguko wa kupita nguzo (PPF), mzunguko wa mtetemo unaozalishwa na mwingiliano wa rota na nguzo za steta, wa uchunguzi wa upenyo wa pengo la hewa na matatizo ya sumakuumeme kwenye injini.<\/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\/sw\/wp-json\/wp\/v2\/glossary\/197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/glossary\/197\/revisions"}],"predecessor-version":[{"id":102086,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/glossary\/197\/revisions\/102086"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/media?parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/categories?post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/tags?post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}