{"id":3578,"date":"2016-12-14T14:28:09","date_gmt":"2016-12-14T14:28:09","guid":{"rendered":"https:\/\/epa.de\/filter\/en\/?page_id=543"},"modified":"2025-08-08T16:00:13","modified_gmt":"2025-08-08T14:00:13","slug":"absorption-filters","status":"publish","type":"page","link":"https:\/\/epa.de\/en\/emc\/products\/absorption-filters\/","title":{"rendered":"Absorption filters"},"content":{"rendered":"<h1><\/h1>\n<div class=\"wp-block-epa-am-epa-produkte\">\n    <div class=\"epa-block-products\" id=\"AF-BCR\">\n        <div class=\"card border-0 rounded-0\">\n            <div class=\"card-body\">\n\n                <div class=\"row g-0\">\n                    <div class=\"col-md-4\"><img decoding=\"async\" src=\"https:\/\/epa.de\/en\/wp-content\/uploads\/sites\/2\/2025\/05\/product_AF-BCR-5-3L-44-1024x768.jpg\" class=\"fluid img-thumbnail border border-primary rounded-0\" alt=\"Produktbild AF-BCR\"><\/div>                    <div class=\"col-md-8\">\n                        <div class=\"card-body\">\n                            <div class=\"product-sharing-options ps-2 pe-2 position-absolute top-0 end-0 m-2 bg-white rounded\">\n                                <a href=\"mailto:?subject=Sehen%20Sie%20sich%20AF-BCR%20auf%20epa.de%20an%21&#038;body=Hier%20der%20Link%3A%20https%3A%2F%2Fepa.de%2Fen%2Femc%2Fproducts%2Fabsorption-filters%2F%23AF-BCR\" target=\"blank\" class=\"me-2\"><i class=\"bi bi-envelope\"><\/i><\/a>\n                                <a href=\".\/#AF-BCR\" target=\"blank\"><i class=\"bi bi-link-45deg\"><\/i><\/a>\n                            <\/div>\n\n                            <h3 class=\"card-title\">AF-BCR<\/h3>\n                            <p><p>Motor bearing current reduction filter for an <strong>effective prevention of bearing damage<\/strong><\/p><\/p>\n                            <ul class=\"list-group list-group-flush\"><li class=\"list-group-item\">Filter works independently of the operating current on the three phases<\/li><li class='list-group-item'>Current is only limited by the cable cross-section used<\/li><li class='list-group-item'>Significantly reduces bearing currents<\/li><li class='list-group-item'>Easy feed-through installation using an Absorption Tunnel\u00ae<\/li><li class='list-group-item'>Extends drive life<\/li><li class='list-group-item'>Increases system availability with reduced maintenance<\/li><\/ul>                        <\/div>\n\n                        <!-- <div class=\"product-offset-border\"><\/div> -->\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n\n    <!-- Modal -->\n    <div class=\"modal modal-xl fade\" id=\"modal804928692\" tabindex=\"-1\" role=\"dialog\" aria-labelledby=\"exampleModalLongTitle\" aria-hidden=\"true\">\n        <div class=\"modal-dialog\" role=\"document\">\n            <div class=\"modal-content\">\n                <div class=\"modal-header\">\n                    <h3 class=\"modal-title\" 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href=\"\/download\/en\/01_Brochures\/01.01_EMC\/EPA_AF-BCR_Brochure.pdf\">EPA_AF-BCR_Brochure.pdf<\/a><\/td><td class=\"filesize\">1.37 M<\/td><\/tr><tr class=\"foldername\"><td colspan=\"2\"><i class=\"oi oi-folder\"><\/i> <strong>Data_Sheets <span>\u00bb<\/span> EMC <span>\u00bb<\/span> Absorption_Filters<\/strong><\/td><\/tr><tr><td class=\"filepath\"><i class=\"bi bi-arrow-return-right\"><\/i> <a href=\"\/download\/en\/03_Data_Sheets\/03.01_EMC\/03.01.11_Absorption_Filters\/EPA_AF-BCR_brochure.pdf\">EPA_AF-BCR_brochure.pdf<\/a><\/td><td class=\"filesize\">1.40 M<\/td><\/tr><tr><td class=\"filepath\"><i class=\"bi bi-arrow-return-right\"><\/i> <a href=\"\/download\/en\/03_Data_Sheets\/03.01_EMC\/03.01.11_Absorption_Filters\/EPA_Absorption-filters_motor-bearing-current-reductions-filters_AF-BCR_data-sheet.pdf\">EPA_Absorption-filters_motor-bearing-current-reductions-filters_AF-BCR_data-sheet.pdf<\/a><\/td><td class=\"filesize\">2.74 M<\/td><\/tr><tr class=\"foldername\"><td colspan=\"2\"><i class=\"oi oi-folder\"><\/i> <strong>CAD <span>\u00bb<\/span> Ableitstrom <span>\u00bb<\/span> AF-BCR<\/strong><\/td><\/tr><tr><td class=\"filepath\"><i class=\"bi bi-arrow-return-right\"><\/i> <a href=\"\/download\/en\/06_CAD\/06.03_Ableitstrom\/06.03.05_AF-BCR\/AF-BCR.zip\">AF-BCR.zip<\/a><\/td><td class=\"filesize\">2.82 M<\/td><\/tr><tr class=\"foldername\"><td colspan=\"2\"><i class=\"oi oi-folder\"><\/i> <strong>Media <span>\u00bb<\/span> Videos<\/strong><\/td><\/tr><tr><td class=\"filepath\"><i class=\"bi bi-arrow-return-right\"><\/i> <a href=\"\/download\/en\/12_Media\/12.03_Videos\/AF-BCR filter series - Reduce damage on motor bearings.mp4\">AF-BCR filter series &#8211; Reduce damage on motor bearings.mp4<\/a><\/td><td class=\"filesize\">504.15 M<\/td><\/tr><\/table><\/div><\/div><\/div>\n\n<h1><\/h1>\n<div class=\"wp-block-epa-am-epa-produkte\">\n    <div class=\"epa-block-products\" id=\"AF-DSR\">\n        <div class=\"card border-0 rounded-0\">\n            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<\/div>\n\n                            <h3 class=\"card-title\">AF-DSR<\/h3>\n                            <p><p>Differential current reduction filters<\/p><\/p>\n                            <ul class=\"list-group list-group-flush\"><li class=\"list-group-item\">Nominal currents from 16 A up to 63 A<\/li><li class='list-group-item'>Reduces differential currents<\/li><li class='list-group-item'>Reduces maintenance and downtimes<\/li><li class='list-group-item'>Easy to retrofit<\/li><li class='list-group-item'>Flexibly combinable with other RFI filters<\/li><\/ul>                        <\/div>\n\n                        <!-- <div class=\"product-offset-border\"><\/div> -->\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n\n    <!-- Modal -->\n    <div class=\"modal modal-xl fade\" id=\"modal543059177\" tabindex=\"-1\" role=\"dialog\" aria-labelledby=\"exampleModalLongTitle\" aria-hidden=\"true\">\n        <div 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class=\"btn btn-primary w-50 me-1\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapse543059177\" aria-expanded=\"false\" aria-controls=\"collapse543059177\"><i class=\"bi bi-cloud-arrow-down-fill\"><\/i> Downloads for the product<\/button>\n        <button type=\"button\" class=\"btn btn-primary w-50 ms-1\" data-bs-toggle=\"modal\" data-bs-target=\"#modal543059177\" onclick=\"setProductName2modalForm543059177()\"><i class=\"bi bi-question-circle-fill\"><\/i> Request product<\/button>\n    <\/div>\n\n    <div class=\"table-container collapse mb-5\" id=\"collapse543059177\" style=\"margin-top: -2.5rem; marting-bottom: 2.5rem;\"><div class=\"rounded p-2 border border-dark\"><table class=\"table table-striped mb-0 pb-0 wp-block-epa-am-epa-produkte\"\"><thead class=\"table-dark\"><tr><th><i class=\"bi bi-file-earmark-fill\"> File<\/th><th class=\"filesize\"><i class=\"bi bi-hdd-fill\"><\/i> Size<\/th><\/tr><\/thead><tbody><tr class=\"foldername\"><td colspan=\"2\"><i class=\"oi oi-folder\"><\/i> <strong>Data_Sheets <span>\u00bb<\/span> EMC <span>\u00bb<\/span> Absorption_Filters<\/strong><\/td><\/tr><tr><td class=\"filepath\"><i class=\"bi bi-arrow-return-right\"><\/i> <a href=\"\/download\/en\/03_Data_Sheets\/03.01_EMC\/03.01.11_Absorption_Filters\/EPA_Absorption-filters_differential-current-reduction-filters_AF-DSR_data-sheet.pdf\">EPA_Absorption-filters_differential-current-reduction-filters_AF-DSR_data-sheet.pdf<\/a><\/td><td class=\"filesize\">2.93 M<\/td><\/tr><\/table><\/div><\/div><\/div>\n\n\n<div style=\"height:var(--wp--preset--spacing--50)\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Causes of motor bearing damage<\/h2>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">High-frequency voltages from drive controllers are often the cause of accelerated bearing wear on electric motors \u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Due to the constantly increasing integration density of the components in the control cabinets, increased higher <strong>parasitic capacitances<\/strong>, in conjunction with the corresponding wiring, are produced <strong>against the reference potential<\/strong>, such as the control cabinet housings, PE and &#8220;reference ground&#8221;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By the use of electronic drive controllers with an intermediate DC link high &#8220;voltage divisions&#8221; (dV\/dt values), also called <strong>common mode voltage<\/strong>, occur through the short rise times of the fast switching output stages (IGBTs).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In combination with the parasitic capacitances in the system, such as shielded and\/or long motor cables or possibly several motors connected to one controller, considerable <strong>high-frequency residual currents (common mode currents) arise in the kilo- to megahertz range<\/strong>. The effective values of these currents can be in the <strong>double-digit ampere range<\/strong>, depending on the cabinet design and the wiring of the machines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For the most part, they do not flow between the voltage-carrying lines, but on all phases at the same time, galvanically on (shielded) lines or via the bearing of motors, but especially via motor spindles as these have, based on their design, higher capacitance values between the stator and the rotor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The current flow is then returned to the source of interferences via the reference potential such as the housings, earth and PE connections.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Residual currents do not necessarily flow outside the system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is quite possible that a residual current circuit breaker upstream of the supply network operates reliably, but considerable residual currents occur within the machine or facility. Thus, operational faults such as &#8220;bus errors&#8221;, &#8220;rotary encoder errors&#8221; and incorrect input and output signals in controllers, up to the destruction of motor bearings are possible.<\/p>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The best residual currents are those that are not present. However, the currently used products in the drive technology do not permit the avoidance of these parasitic currents technically.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Differential and associated bearing currents are a complex and interesting area! Not the drive controller, the structure, the wiring, or even the motor\/the motor spindle is the problem itself, but the interaction of the components throughout the whole system, including grounding, RF ground connection, and line routing.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">The use of absorbing filter measures to reduce these undesired currents can currently be viewed as a major factor in improving the operational safety of machines and facilities. The motor bearing current reduction filters EPA AF-BCR are connected to the motor cable between frequency inverter and motor. <strong>Easy retrofitting without spending a lot of time and money.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Causes of motor bearing damage High-frequency voltages from drive controllers are often the cause of accelerated bearing wear on electric motors \u2026 Due to the constantly increasing integration density of the components in the control cabinets, increased higher parasitic capacitances, in conjunction with the corresponding wiring, are produced against the reference potential, such as the <a href=\"https:\/\/epa.de\/en\/emc\/products\/absorption-filters\/\" class=\"more-link\">&#8230;<span class=\"screen-reader-text\">  Absorption filters<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3574,"menu_order":7,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3578","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/pages\/3578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/comments?post=3578"}],"version-history":[{"count":1,"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/pages\/3578\/revisions"}],"predecessor-version":[{"id":6071,"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/pages\/3578\/revisions\/6071"}],"up":[{"embeddable":true,"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/pages\/3574"}],"wp:attachment":[{"href":"https:\/\/epa.de\/en\/wp-json\/wp\/v2\/media?parent=3578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}