# How do I get the transformer Core Loss?

**URL:** <https://forum.plexim.com/t/how-do-i-get-the-transformer-core-loss/1197>\
**Category:** PLECS\
**Tags:** plecs, core, hysteretic-core\
**Created:** [January 3, 2023, 9:34pm UTC](https://forum.plexim.com/t/how-do-i-get-the-transformer-core-loss/1197 "2023-01-03T21:34:06Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Seonho\_Yang](https://avatars.discourse-cdn.com/v4/letter/s/7cd45c/32.png) [@Seonho\_Yang](https://forum.plexim.com/u/Seonho_Yang)\
**Post date:** [January 3, 2023, 9:34pm UTC](https://forum.plexim.com/t/how-do-i-get-the-transformer-core-loss/1197/1 "2023-01-03T21:34:06Z")

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Hello

I would like to know how to obtain the core loss used in the transformer through the PLECS program.  
Also, I wonder if there is a way to check if the B-H curve of the core matches the actual B-H curve.

It’s a question that’s lacking, but I’d appreciate it if you could answer it.

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**Author:** ![RetoChristen](https://dub1.discourse-cdn.com/flex006/user_avatar/forum.plexim.com/retochristen/32/1225_2.png) [@RetoChristen](https://forum.plexim.com/u/RetoChristen)\
**Post date:** [January 9, 2023, 2:07am UTC](https://forum.plexim.com/t/how-do-i-get-the-transformer-core-loss/1197/2 "2023-01-09T02:07:48Z")

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Dear Seonho Yang,

the “Hysteretic Core” block has “Loss Energy” as an output that you can probe.  
I have attached a small model probing this core to get the core loss and BH curve using an XY plot.

If you need further assistance, please write to [support@plexim.com](mailto:support@plexim.com).

Best regards,  
Reto

[HystereticCore.plecs](https://forum.plexim.com/uploads/short-url/uF10n7LElf4YIFjatnJTMvDjxHJ.plecs) (9.99 KB)

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<div class="post-metadata">

**Author:** ![Seonho\_Yang](https://avatars.discourse-cdn.com/v4/letter/s/7cd45c/32.png) [@Seonho\_Yang](https://forum.plexim.com/u/Seonho_Yang)\
**Post date:** [January 9, 2023, 9:41pm UTC](https://forum.plexim.com/t/how-do-i-get-the-transformer-core-loss/1197/3 "2023-01-09T21:41:38Z")

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Thank you for your reply.

What is the principle of drawing the B-H curve in the PLECS program?

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<div class="post-metadata">

**Author:** ![RetoChristen](https://dub1.discourse-cdn.com/flex006/user_avatar/forum.plexim.com/retochristen/32/1225_2.png) [@RetoChristen](https://forum.plexim.com/u/RetoChristen)\
**Post date:** [January 11, 2023, 4:57am UTC](https://forum.plexim.com/t/how-do-i-get-the-transformer-core-loss/1197/4 "2023-01-11T04:57:57Z")

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You are welcome!

PLECS uses the Preisach model ([https://en.wikipedia.org/wiki/Preisach\_model\_of\_hysteresis](https://en.wikipedia.org/wiki/Preisach_model_of_hysteresis)).