Webinar: Transformer and Inductor Modeling

Fanny Littmarck January 31, 2013
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Transformers are used to increase the voltage of an alternating current (AC) before moving it along the power grid via power lines. Since power lines lose energy through heating cased by electric currents, you can achieve more economical power transmission by transforming to a high voltage and low current. As a matter of fact, high voltage (HV) power transmission lines transmit portions of its power in the air surrounding it. Furthermore, as the current travels long distances through many transformer stages, small design-changes in transformers can have very large effects in overall power transmission. To show you how these design improvements can be made, we’re holding a webinar on transformer and inductor modeling together with IEEE Spectrum on February 7th.

Transformer and inductor modeling
E-core transformer: the magnetic flux density norm and currents in the winding.

Transformer and Inductor Modeling, Coupling AC/DC and Heat Transfer

A transformer is made up of at least two inductors with coupled magnetic flux. Inductors are simply put passive two-terminal electrical components with energy stored in their magnetic field. High-frequency AC tends to flow through the outer layer of a conductor, referred to as “skin effect“. The skin effect is important in terms of transformer efficiency as the frequency increases. As you can see, electrical and thermal effects are tightly coupled here, rendering this an excellent problem to solve using multiphysics simulation. In the webinar next week, Magnus Olsson, Product Manager of Electromagnetics, will show you how you can use COMSOL Multiphysics together with the AC/DC and Heat Transfer Module to simulate transformers and inductors. As usual, the webinar will begin with an overview of COMSOL, then Magnus will show you some examples specific to the topic. Among other things, you will see a demo video of the inductive heating of a billet as well as the modeling of a single-phase e-core transformer, with some tips and tricks along the way.

The Transformer and Inductor Modeling with COMSOL Multiphysics webinar is free-of-charge, but you will need to register in advance.

Further Reading

Find out how ABB used COMSOL Multiphysics to model transformers in COMSOL News 2012.



  1. Scott Wiedeman October 9, 2016   12:15 am

    Why do I get “Page not Found” when I search COMSOL online documentation as directed to the link: http://spectrum.ieee.org/webinar/transformer-and-inductor-modeling-with-comsol-multiphysics

    And why am I unable to find the “Terminal mode” or “Terminal boundary condition” in the AC/DC module as referenced in more COMSOl documentation?

  2. Fanny Littmarck October 12, 2016   8:30 am

    Hello Scott,

    The webinar you reference was hosted by IEEE Spectrum in 2013 and they do not keep archived webinars indefinitely, hence the 404 error. If you are looking for resources on modeling inductors, you may find this newer blog post useful: https://www.comsol.com/blogs/evaluate-your-3d-inductor-design-with-comsol-multiphysics/

    The domain-level Terminal feature is available within “Electrostatics” and “Electric Currents” in version 5.2a of COMSOL Multiphysics and the AC/DC Module. If you need assistance with your modeling, please contact Support (https://www.comsol.com/support).

  3. rina rimi November 25, 2016   10:07 am

    i want to know how can i make series winding for a transformer in comsol? is it possible?
    i want to connect a voltage source to them and then find the thermal changes , electric and magnetic field in it. is it possible to make so many many separate windings in series?
    thanks in advance
    looking forward to reading from u

  4. Bridget Cunningham November 28, 2016   1:11 pm

    Hello Rina,

    Thank you for your question. This is possible to do with COMSOL Multiphysics.

    If you have additional questions, please contact our support team.

    Online support center: https://www.comsol.com/support
    Email: support@comsol.com


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