{"id":234877,"date":"2022-09-09T18:51:51","date_gmt":"2022-09-09T18:51:51","guid":{"rendered":"\/forum\/?post_type=topic&#038;p=234877"},"modified":"2022-09-23T10:12:10","modified_gmt":"2022-09-23T10:12:10","slug":"maxwell-3d-b-h-curve-and-magnetic-saturation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/maxwell-3d-b-h-curve-and-magnetic-saturation\/","title":{"rendered":"Maxwell 3D B-H Curve and Magnetic Saturation"},"content":{"rendered":"<p>I&#8217;m using Maxwell 3D in AEDT 2022R1 to model two windings (yellow) on a core (dark blue) with a nonlinear B-H curve.&nbsp; The magnetic circuit is completed by a linear magnetic box (lighter blue) as shown.&nbsp; I&#8217;m using an external circuit to connect the windings in series, and to excite them with a sinusoidal voltage source (red curve).&nbsp; There&#8217;s enough current flowing (blue curve) that, when it&#8217;s multiplied by the number of turns and divided by the length of the windings, I think the H field should be strong enough that the core should be starting to saturate.&nbsp; However, the current (again, blue curve) looks perfectly sinusoidal.&nbsp;&nbsp;<\/p>\n<p>I&#8217;m therefore wondering if I have something set up incorrectly, such that the transient solver isn&#8217;t taking nonlinear B-H into account.&nbsp; I&#8217;ve attached some screen shots of excitations, etc.<\/p>\n<p>Other notes:<\/p>\n<ol>\n<li>When I solved this in the eddy solver, the matrix inductance and resistance were at least &#8220;in the ballpark&#8221; of what I expected.<\/li>\n<li>I let the mesh get up to 400k tets, which I think should be plenty.<\/li>\n<li>There&#8217;s a small air gap between the core and the linear magnetic material.<\/li>\n<li>Turning on &#8220;Magnetization Computation&#8221; didn&#8217;t seem to make a difference.&nbsp;&nbsp;<\/li>\n<li>The &#8220;AF&#8221; solver makes the output current settle quickly as advertised, but otherwise seemed to have no effect.<\/li>\n<li>It might be obvious, but this is my first time using Maxwell 3D &nbsp;<img decoding=\"async\" class=\"emoji\" role=\"img\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/13.1.0\/svg\/1f609.svg\" alt=\"?\"><\/li>\n<\/ol>\n<p>Any ideas or advice would be appreciated.&nbsp; Thanks!<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" title=\"Model close up\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662745801-Model zoom in.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"Model and transient results\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662748452-Model and transient results.PNG\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"Eddy settings\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662749339-Eddy Settings.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"Winding with coil termina\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662749372-Winding with Coil Terminal.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"Mesh settings\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662749396-Mesh Settings.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"Solver Setup 1\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662747357-Solver Setup 1.PNG\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"Solver Setup 2\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662748235-Solver Setup 2.PNG\" alt=\"\"><\/p>\n<p><img decoding=\"async\" title=\"Solver Setup 3\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/09\/09-09-2022-1662748260-Solver Setup 3.PNG\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-234877","topic","type-topic","status-closed","hentry","topic-tag-3d-maxwell-simulation","topic-tag-ansysmaxwelltransient","topic-tag-non-linear"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["23.56.168.214"],"_bbp_subscription":["262276","94"],"_btv_view_count":["1772"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["234877"],"_bbp_forum_id":["27793"],"_bbp_engagement":["94","262276"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["236141"],"_bbp_last_active_id":["236141"],"_bbp_last_active_time":["2022-09-23 10:11:59"]},"test":"christopher-irwinngc-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/234877","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\/234877\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=234877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}