{"id":1247,"date":"2023-12-22T12:09:06","date_gmt":"2023-12-22T12:09:06","guid":{"rendered":"https:\/\/epa.de\/filter\/en\/?page_id=1247"},"modified":"2023-12-22T12:21:22","modified_gmt":"2023-12-22T12:21:22","slug":"diffdi-common-mode-current-diagnostic-system","status":"publish","type":"page","link":"https:\/\/epa.de\/filter\/en\/diffdi-common-mode-current-diagnostic-system\/","title":{"rendered":"DiffDi<sup>\u00ae<\/sup> Common Mode Current Diagnostic System"},"content":{"rendered":"<p class=\"lead\">Why is an engine repeatedly defective? How can you ensure extremely high system availability? How can you prevent engine bearing damage in hard-to-reach locations?<\/p>\n<p>Questions that many machine manufacturers and service companies have probably asked themselves more than once. Cause-oriented measures are required, especially when circumstances are challenging. Using the DiffDi\u00ae diagnostic system, it is possible to record, analyze and evaluate high-frequency common mode currents and their effects on inverter-driven motors quickly and easily.<\/p>\n<p>After a short menu-guided software and device driver installation under Windows, the currents in the kHz to MHz range are recorded on the motor side via the measuring device. The application is simple: you place the Rogowski measuring coil around the three motor phases &#8211; it is not necessary to separate the current path.<\/p>\n<p>In the first step of the measurement, the actual state of the machine is recorded. The software DiffDi-Soft, which was specially developed for this purpose, enables snapshots of the high-frequency currents present in the drive system. Peak values can be analyzed, evaluated and documented. The selection of e.g. a motor filter for step two is based on the previously obtained data.<\/p>\n<p>After installing the filter measure, step one is repeated and the effect of the method is confirmed by the measurement.<\/p>\n<p>In the last step, the recorded measurements 1 and 2 can be compared with each other at the push of a button. This allows the recorded periods to be compared and evaluated. A before and after view of the measured values provides important information about the effectiveness of the EMC\/filter measures taken, such as reducing the common mode currents.<\/p>\n<hr \/>\n<p><div id='gallery-1' class='gallery galleryid-1247 gallery-columns-3 gallery-size-medium'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/01_Screenshot_Signal.png' title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"284\" src=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/01_Screenshot_Signal-480x284.png\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1251\" srcset=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/01_Screenshot_Signal-480x284.png 480w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/01_Screenshot_Signal-1024x606.png 1024w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/01_Screenshot_Signal-768x454.png 768w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/01_Screenshot_Signal.png 1532w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1251'>\n\t\t\t\tThis measurement should be carried out first to ensure the correct functioning of the hardware and software. The level of the differential current can also be determined here and the corresponding measuring range can be selected. The time axis is set to 300 \u00b5s by default.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/02_Screenshot_Trend.png' title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"284\" src=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/02_Screenshot_Trend-480x284.png\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1252\" srcset=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/02_Screenshot_Trend-480x284.png 480w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/02_Screenshot_Trend-1024x606.png 1024w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/02_Screenshot_Trend-768x454.png 768w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/02_Screenshot_Trend.png 1532w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1252'>\n\t\t\t\tThe trend display is comparable to the signal display, but the display is over a longer period of time (time axis here at 9.5 ms), so the repetition of current peaks can be better assessed.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/03_Screenshot_Initial_Measurement.png' title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"284\" src=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/03_Screenshot_Initial_Measurement-480x284.png\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1253\" srcset=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/03_Screenshot_Initial_Measurement-480x284.png 480w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/03_Screenshot_Initial_Measurement-1024x606.png 1024w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/03_Screenshot_Initial_Measurement-768x454.png 768w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/03_Screenshot_Initial_Measurement-1536x908.png 1536w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/03_Screenshot_Initial_Measurement.png 1916w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1253'>\n\t\t\t\tThis measurement is used to record the current state. In the \u201cInitial Measurement\u201d menu, a 10-second measurement is started and recorded using the \u201cMeasurement\u201d button. The peak values can be seen in the table on the right. If necessary, the measurement result can be saved in a file and accessed again later.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/04_Screenshot_Final_Measurement.png' title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"284\" src=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/04_Screenshot_Final_Measurement-480x284.png\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1254\" srcset=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/04_Screenshot_Final_Measurement-480x284.png 480w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/04_Screenshot_Final_Measurement-1024x606.png 1024w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/04_Screenshot_Final_Measurement-768x454.png 768w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/04_Screenshot_Final_Measurement-1536x908.png 1536w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/04_Screenshot_Final_Measurement.png 1916w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1254'>\n\t\t\t\tNach der Installation der Filterma\u00dfnahme wird im Men\u00fc \u201eFinal Measurement\u201c \u00fcber den Button \u201eMeasurement\u201c erneut eine 10 Sekunden andauernde Messung gestartet und aufgezeichnet. Auch hier k\u00f6nnen die Spitzenwerte in der Tabelle auf der rechten Seite abgelesen werden. Bei Bedarf kann das Messergebnis auch in einer Datei abgespeichert und sp\u00e4ter erneut aufgerufen werden.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/05_Screenshot_Compare_Measurements.png' title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"284\" src=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/05_Screenshot_Compare_Measurements-480x284.png\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1255\" srcset=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/05_Screenshot_Compare_Measurements-480x284.png 480w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/05_Screenshot_Compare_Measurements-1024x606.png 1024w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/05_Screenshot_Compare_Measurements-768x454.png 768w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/05_Screenshot_Compare_Measurements-1536x908.png 1536w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/05_Screenshot_Compare_Measurements.png 1916w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1255'>\n\t\t\t\tThe \u201cGet Measurements\u201d button can be found in the \u201cCompare\u201d menu. By clicking on it, the software begins to load the two previously recorded measurements and display them in the graph below. The illustration serves as a direct comparison between \u201cInitial Measurement\u201d and \u201cFinal Measurement\u201d. The differences are shown in the table on the right.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/06_Screenshot_Compare_Measurements_Envelope_Curves.png' title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"284\" src=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/06_Screenshot_Compare_Measurements_Envelope_Curves-480x284.png\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1256\" srcset=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/06_Screenshot_Compare_Measurements_Envelope_Curves-480x284.png 480w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/06_Screenshot_Compare_Measurements_Envelope_Curves-1024x606.png 1024w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/06_Screenshot_Compare_Measurements_Envelope_Curves-768x454.png 768w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/06_Screenshot_Compare_Measurements_Envelope_Curves-1536x908.png 1536w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/06_Screenshot_Compare_Measurements_Envelope_Curves.png 1916w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1256'>\n\t\t\t\tUsing the \u201cEnvelope\u201d selection, the envelope curves of the two comparison measurements are displayed. This makes it easier to assess the repetition of current peaks in relation to the highest peak value (red dashed line).\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/07_Screenshot_Compare_Columns.png' title=\"\" data-rl_title=\"\" class=\"rl-gallery-link\" data-rl_caption=\"\" data-rel=\"lightbox-gallery-1\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"284\" src=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/07_Screenshot_Compare_Columns-480x284.png\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-1257\" srcset=\"https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/07_Screenshot_Compare_Columns-480x284.png 480w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/07_Screenshot_Compare_Columns-1024x606.png 1024w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/07_Screenshot_Compare_Columns-768x454.png 768w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/07_Screenshot_Compare_Columns-1536x908.png 1536w, https:\/\/epa.de\/filter\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/07_Screenshot_Compare_Columns.png 1916w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-1257'>\n\t\t\t\tIn the \u201cCompare\u201d menu, you can use the \u201cColumns\u201d button to compare both measurements in column form. The peak and RMS values as well as the difference are displayed graphically.\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n<\/p>\n<hr \/>\n<h2>Also available as rental unit!<\/h2>\n<p class=\"rent-a-system-claim\">rent, test and get convinced!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/localhost\/epa-filter\/de\/wp-content\/uploads\/sites\/3\/2022\/11\/DiffDi-v2_freigestellt.png\" alt=\"\" width=\"800\" height=\"800\" class=\"alignnone size-full wp-image-2086\" \/><\/p>\n<hr \/>\n<h2>Contact<\/h2>\n<p><figure id=\"attachment_969\" aria-describedby=\"caption-attachment-969\" style=\"width: 400px\" class=\"wp-caption alignright\"><a href=\"https:\/\/epa.de\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-969\" src=\"https:\/\/epa.de\/filter\/de\/wp-content\/uploads\/sites\/3\/2015\/06\/logo_ohne_r.png\" alt=\"www.epa.de\" width=\"400\" height=\"483\" \/><\/a><figcaption id=\"caption-attachment-969\" class=\"wp-caption-text\"><a href=\"https:\/\/epa.de\" target=\"blank\" rel=\"noopener noreferrer\">www.epa.de<\/a><\/figcaption><\/figure><\/p>\n<p>For inquiries and consultation, please contact:<\/p>\n<address><strong>EPA GmbH<\/strong><br \/>\nFliederstra\u00dfe 8<br \/>\nD-63486 Bruchk\u00f6bel<br \/>\nGermany<\/address>\n<p><strong>Tel.:<\/strong> +49 (0) 6181 &#8211; 9704 &#8211; 0<br \/>\n<strong>Fax:<\/strong> +49 (0) 6181 &#8211; 9704 &#8211; 99<\/p>\n<p><strong>E-Mail:<\/strong> <a href=\"mailto:info@epa.de\">info@epa.de<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why is an engine repeatedly defective? How can you ensure extremely high system availability? How can you prevent engine bearing damage in hard-to-reach locations? Questions that many machine manufacturers and service companies have probably asked themselves more than once. Cause-oriented measures are required, especially when circumstances are challenging. Using the DiffDi\u00ae diagnostic system, it is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1249,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-diffdi.php","meta":{"footnotes":""},"class_list":["post-1247","page","type-page","status-publish","has-post-thumbnail","hentry"],"publishpress_future_action":{"enabled":false,"date":"2026-05-02 08:11:51","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/pages\/1247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/comments?post=1247"}],"version-history":[{"count":3,"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/pages\/1247\/revisions"}],"predecessor-version":[{"id":1258,"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/pages\/1247\/revisions\/1258"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/media\/1249"}],"wp:attachment":[{"href":"https:\/\/epa.de\/filter\/en\/wp-json\/wp\/v2\/media?parent=1247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}