{"id":457146,"date":"2026-04-27T09:02:40","date_gmt":"2026-04-27T09:02:40","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/assigning-ac-voltage\/"},"modified":"2026-04-27T09:02:40","modified_gmt":"2026-04-27T09:02:40","slug":"assigning-ac-voltage","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/assigning-ac-voltage\/","title":{"rendered":"Assigning AC voltage"},"content":{"rendered":"<p>&lt;p&gt;Hi All,&nbsp;&lt;br&gt;&lt;br&gt;What&#8217;s the correct way to assign AC voltage to the phase windings in a PCB in HFSS ?&lt;\/p&gt;&lt;p&gt;I connected voltage sources to the desired terminals and gave magnitude 220*sin(2*pi*50*t) , 220*sin(2*pi*50*t &#8211; (2*pi\/3)) and 220*sin(2*pi*50*t + (2*pi\/3)).&nbsp; While putting the board into analysis, it gave error as &#8220;No excitations are defined&#8221;.&nbsp;&lt;br&gt;&lt;br&gt;Is there any option to define time &#8216;t&#8217; in the voltage expression or do I need to provide range for &#8216;t&#8217;?&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-457146","topic","type-topic","status-publish","hentry","topic-tag-ansys-hfss","topic-tag-hfss"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27793"],"_bbp_topic_id":["457146"],"_bbp_subscription":["671463","28551"],"_bbp_author_ip":["14.139.195.212"],"_bbp_last_reply_id":["457222"],"_bbp_last_active_id":["457222"],"_bbp_last_active_time":["2026-04-28 00:52:23"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["671463","28551"],"_btv_view_count":["25"],"_bbp_topic_status":["unanswered"]},"test":"ss135iitbbs-ac-in"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457146","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\/457146\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=457146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}