{"id":398186,"date":"2024-12-21T20:43:52","date_gmt":"2024-12-21T20:43:52","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/"},"modified":"2024-12-21T20:43:52","modified_gmt":"2024-12-21T20:43:52","slug":"alnico-hysteresis-simulation","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/","title":{"rendered":"AlNiCo hysteresis simulation"},"content":{"rendered":"<p>&lt;p&gt;I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.&lt;\/p&gt;&lt;p&gt;I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through the coil, which causes a strong magnetic field to be induced inside the magnet for a few microseconds. The field is sufficiently strong to reverse the magnetization of the cylinder. After the current is removed, I expect the cylinder to reverse its magnetization; however, it just returns to its original state. The behavior of this simple simulation setup does not match the behavior of an actual prototype I assembled on the bench; the reason the prototype was built is to validate the correctness of Maxwell predictions but right now it is failing that.&lt;\/p&gt;&lt;p&gt;The cylinder is made of LNG37 and the same material is selected in the simulation, taken from the RMxpert library; the material definition includes the correct BH curve spanning the first two quadrants, which should be sufficient to simulate the hysteresis effect according to what I read in the help and here on the forum.&lt;\/p&gt;&lt;p&gt;Below are the plots of the solenoid current over time and the magnetic flux magnitude; the magnitude starts from 50 mT and goes back to that as expected, but what is unexpected is that the original magnetization direction is restored.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/21-12-2024-1734813671-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;Can you please share any pointers what is it that I am doing wrong? Thanks!&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-398186","topic","type-topic","status-publish","hentry","topic-tag-ansys-maxwell","topic-tag-ansys-maxwell-3d","topic-tag-ansysmaxwelltransient","topic-tag-bh-curve-1","topic-tag-demagnetization","topic-tag-magnetization-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"AlNiCo hysteresis simulation | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-12-21T20:43:52+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-12-21T20:43:52+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"AlNiCo hysteresis simulation | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/alnico-hysteresis-simulation\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/ansys-maxwell\\\/#listItem\",\"name\":\"ansys-maxwell\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/ansys-maxwell\\\/#listItem\",\"position\":3,\"name\":\"ansys-maxwell\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/ansys-maxwell\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/alnico-hysteresis-simulation\\\/#listItem\",\"name\":\"AlNiCo hysteresis simulation\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/alnico-hysteresis-simulation\\\/#listItem\",\"position\":4,\"name\":\"AlNiCo hysteresis simulation\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/ansys-maxwell\\\/#listItem\",\"name\":\"ansys-maxwell\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/alnico-hysteresis-simulation\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/alnico-hysteresis-simulation\\\/\",\"name\":\"AlNiCo hysteresis simulation | Ansys Learning Forum\",\"description\":\"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/alnico-hysteresis-simulation\\\/#breadcrumblist\"},\"datePublished\":\"2024-12-21T20:43:52+00:00\",\"dateModified\":\"2024-12-21T20:43:52+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"AlNiCo hysteresis simulation | Ansys Learning Forum","description":"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/forum\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/ansys-maxwell\/#listItem","name":"ansys-maxwell"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/ansys-maxwell\/#listItem","position":3,"name":"ansys-maxwell","item":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/ansys-maxwell\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/#listItem","name":"AlNiCo hysteresis simulation"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/#listItem","position":4,"name":"AlNiCo hysteresis simulation","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/ansys-maxwell\/#listItem","name":"ansys-maxwell"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/","name":"AlNiCo hysteresis simulation | Ansys Learning Forum","description":"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/#breadcrumblist"},"datePublished":"2024-12-21T20:43:52+00:00","dateModified":"2024-12-21T20:43:52+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"AlNiCo hysteresis simulation | Ansys Learning Forum","og:description":"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/","article:published_time":"2024-12-21T20:43:52+00:00","article:modified_time":"2024-12-21T20:43:52+00:00","twitter:card":"summary_large_image","twitter:title":"AlNiCo hysteresis simulation | Ansys Learning Forum","twitter:description":"I know this question has been asked many times, but sadly none of the previous discussions I encountered appear to contain a definitive answer on how to make this work.I have a very basic Maxwell 3D transient simulation setup with a cylindrical magnet and a coil wound around it. I apply a current pulse through"},"aioseo_meta_data":{"post_id":"398186","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2025-10-19 10:35:49","updated":"2025-10-19 10:35:49","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/ansys-maxwell\/\" title=\"ansys-maxwell\">ansys-maxwell<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tAlNiCo hysteresis simulation\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"ansys-maxwell","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/ansys-maxwell\/"},{"label":"AlNiCo hysteresis simulation","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/alnico-hysteresis-simulation\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27793"],"_bbp_topic_id":["398186"],"_bbp_subscription":["492515","602"],"_bbp_author_ip":["195.50.210.145"],"_bbp_last_reply_id":["403446"],"_bbp_last_active_id":["403446"],"_bbp_last_active_time":["2025-01-03 18:51:18"],"_bbp_reply_count":["9"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["492515","602"],"_btv_view_count":["878"],"_bbp_topic_status":["unanswered"]},"test":"pavel-kirienkozubax-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/398186\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=398186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}