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PrincetonUniversity / magnet

Open Source Research Platform for Power Magnetics Modeling
https://mag-net.princeton.edu/
MIT License
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Excitations, data and simulation over 500 kHz? #71

Open GuilleMaese opened 2 years ago

GuilleMaese commented 2 years ago

Dear team,

I can see now that all the database, as well as the options you provide, only allows a frequency range from 50 to 500 kHz.

Nevertheless, many applications require frequencies over 500 kHz.

Are you planning to extend your tool for frequencies over 500 kHz (for those materials that can operate over this frequency) ?

Thank you very much!! Keep up the good work.

ds9056 commented 2 years ago

Thank you for your interest one more time GuilleMaese. We are aware that 500 kHz might be too low for certain applications. However, with the measurement system that we are using, we cannot guarantee the accuracy of the data at very high frequencies, especially for materials with low losses. The problem is we calculate core losses based on direct voltage and current measurements, a technique highly sensitive to delays. Any delay between the voltage and current measurement would be interpreted as losses, and this effect has a larger impact at higher frequencies for any given time delay. We are not planning to change the setup for the measurements; this one does not require hardware changes when measuring different operation points, making it very well suited for automation. To sum up, to ensure that the quality of the data is maintained, we do not plan to increase the frequency. We will update the FAQ section to clarify this limitation.

GuilleMaese commented 2 years ago

Dear Diego Serrano,

Thank you very much for the clarification. I think that is a strong reason. Nevertheless, please keep us posted in case you decide in the future to modify the setup so that higher frequency characterisation can be performed. It will definitely be a great improvement given the constraints that it carries along with this.

Best regards,

Guillermo Salinas López Power Electronics Designer Engineering & Technologies - TSPIE Airbus Crisa C/ Torres Quevedo, 9 28760 – Tres Cantos (Madrid) España

De: Diego Serrano @. Enviado el: martes, 5 de abril de 2022 16:47 Para: PrincetonUniversity/magnet @.> CC: SALINAS LOPEZ, Guillermo @.>; Author @.> Asunto: Re: [PrincetonUniversity/magnet] Excitations, data and simulation over 500 kHz? (Issue #71)

Thank you for your interest one more time GuilleMaese. We are aware that 500 kHz might be too low for certain applications. However, with the measurement system that we are using, we cannot guarantee the accuracy of the data at very high frequencies, especially for materials with low losses. The problem is we calculate core losses based on direct voltage and current measurements, a technique highly sensitive to delays. Any delay between the voltage and current measurement would be interpreted as losses, and this effect has a larger impact at higher frequencies for any given time delay. We are not planning to change the setup for the measurements; this one does not require hardware changes when measuring different operation points, making it very well suited for automation. To sum up, to ensure that the quality of the data is maintained, we do not plan to increase the frequency. We will update the FAQ section to clarify this limitation. — Reply to this email directly, view it on GitHubhttps://github.com/PrincetonUniversity/magnet/issues/71#issuecomment-1088804853, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AYD5UOM466HEPOOM32FWGZDVDRG7RANCNFSM5RHOFHQQ. You are receiving this because you authored the thread.Message ID: @.**@.>>

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