{"id":215930,"date":"2022-06-10T18:02:46","date_gmt":"2022-06-10T18:02:46","guid":{"rendered":"\/forum\/forums\/topic\/question-on-how-q3d-calculate-cg-matrix\/"},"modified":"2022-09-28T17:38:19","modified_gmt":"2022-09-28T17:38:19","slug":"question-on-how-q3d-calculate-cg-matrix","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/question-on-how-q3d-calculate-cg-matrix\/","title":{"rendered":"Question on how Q3D calculate CG matrix"},"content":{"rendered":"<p><span style=\"color: #494954;font-family: 'Open Sans';font-size: 15px;background-color: #ffffff\">Hello,&nbsp;<\/span><br style=\"color: #494954;font-family: 'Open Sans';font-size: 15px\" \/><span style=\"color: #494954;font-family: 'Open Sans';font-size: 15px;background-color: #ffffff\">I am currently trying to extract some cable parameters using Q3D, but I am confused by how Q3D generates the CG matrix. The capacitance extraction should correspond to the potential differences between conductor and shield mathematically. However, in my simulation, I did not see any difference in the CG matrix of my Conductor and Shield neither the shield floating nor being assigned Sink and Source of the surface for parameter extraction.<\/span><br style=\"color: #494954;font-family: 'Open Sans';font-size: 15px\" \/><span style=\"color: #494954;font-family: 'Open Sans';font-size: 15px;background-color: #ffffff\">Therefore, I am wondering if the CG matrix is voltage-dependent or if it only depends on the geometrics of the cable layout values. And if it is voltage-dependent, what is the correct way to perform the simulation.<\/span><br style=\"color: #494954;font-family: 'Open Sans';font-size: 15px\" \/><span style=\"color: #494954;font-family: 'Open Sans';font-size: 15px;background-color: #ffffff\">I hope someone can help me better understand the theory behind the Q3D. Thanks ahead!<\/span><\/p>\n","protected":false},"template":"","class_list":["post-215930","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["573"]," _bbp_likes_count":["0"]," _bbp_last_reply_id":["0"],"_bbp_author_ip":["23.218.93.53"],"_bbp_subscription":["8930","23"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["215930"],"_bbp_forum_id":["27793"],"_bbp_engagement":["23","8930"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["236571"],"_bbp_last_active_id":["236571"],"_bbp_last_active_time":["2022-09-28 16:14:42"]},"test":"yuxuan-wustonybrook-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/215930","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\/215930\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=215930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}