{"id":238203,"date":"2022-10-20T08:03:07","date_gmt":"2022-10-20T08:03:07","guid":{"rendered":"\/forum\/forums\/topic\/calculation-of-inductance-matrix-without-return-conductor-and-with-return\/"},"modified":"2022-10-20T08:08:19","modified_gmt":"2022-10-20T08:08:19","slug":"calculation-of-inductance-matrix-without-return-conductor-and-with-return","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/calculation-of-inductance-matrix-without-return-conductor-and-with-return\/","title":{"rendered":"Calculation of inductance matrix without return conductor and with return"},"content":{"rendered":"

Hello,<\/p>\n

I am using Eddy current solver to calculate the frequency-dependent impedance for electrical motors.<\/p>\n

I want to calculate the inductance of each conductor and their coupling. <\/p>\n

At first I use one pole simulation as follows. <\/p>\n

<\/a><\/p>\n

Then, I excite two neighboring conductors as follows:<\/p>\n

<\/a><\/p>\n

<\/a><\/p>\n

Then, the inductance matrix will be set as <\/p>\n

<\/a><\/p>\n

I run the simulation at 20 kHz,<\/p>\n

I get the results as follows:<\/p>\n

<\/a><\/p>\n

However,  they values are too small.<\/p>\n

 <\/p>\n

Then, I run the simulation for a pole pair, and the model is <\/p>\n

<\/p>\n

For the excitation this time, I uses winding and coils. <\/p>\n

the first coil <\/p>\n

<\/a><\/p>\n

the second coil <\/p>\n

<\/a><\/p>\n

Then, the inductance matrix is set:<\/p>\n

<\/a><\/p>\n

afte Simulation, the results are<\/p>\n

<\/a><\/p>\n

The results are much larger than the result in the first case. <\/p>\n

However, I suppose a factor of 2 between them because a turn consists of two conductors. <\/p>\n

 <\/p>\n

Therefore, my question is, why there is such a large difference. Which is one is correct for my application, i believe that the second results are more true. <\/p>\n

Thank you. <\/p>\n","protected":false},"template":"","class_list":["post-238203","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["264747","94"],"_bbp_author_ip":["23.56.168.190"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["319"],"_edit_lock":["1666253266:193355"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["238203"],"_bbp_forum_id":["27793"],"_bbp_engagement":["94","264747"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["239718"],"_bbp_last_active_id":["239718"],"_bbp_last_active_time":["2022-11-04 08:40:13"]},"test":"hujun-pengiem-rwth-aachen-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/238203","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\/238203\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=238203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}