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induction heating

Posted Jul 26, 2013, 8:27 a.m. EDT Low-Frequency Electromagnetics Version 4.3b 2 Replies

Julien Givernaud
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Hello every body,

I want to know if it is possible to measure the impedance of a charge in induction heating process.
I can have lot of informations on the coil parameters (Icoil, Pcoil, Zcoil...) but how can I access to these informations on the charge?
Anyone have a idea?

Thank you very much

Julien
2 Replies Last Post Jul 30, 2013, 5:54 a.m. EDT
Edgar J. Kaiser Certified Consultant
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Posted: 1 decade ago Jul 26, 2013, 9:35 a.m. EDT
Julien,

an impedance is a ratio of field quantitites, in the electromagnetic case this is voltage / current (applicable for lumped components like the coil) or electrical field / magnetic field (applicable for materials with wave propagation far away from boundaries).
This way you can calculate a wave impedance for the material, similar to the way the wave impedance for free space (377 Ohm) is determined.

Have a look at en.wikipedia.org/wiki/Wave_impedance or into a textbook.

Cheers
Edgar

--
Edgar J. Kaiser
emPhys Physical Technology
Julien, an impedance is a ratio of field quantitites, in the electromagnetic case this is voltage / current (applicable for lumped components like the coil) or electrical field / magnetic field (applicable for materials with wave propagation far away from boundaries). This way you can calculate a wave impedance for the material, similar to the way the wave impedance for free space (377 Ohm) is determined. Have a look at http://en.wikipedia.org/wiki/Wave_impedance or into a textbook. Cheers Edgar -- Edgar J. Kaiser emPhys Physical Technology
Julien Givernaud
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Posted: 1 decade ago Jul 30, 2013, 5:54 a.m. EDT
Thank you very much Edgar,

I can try to make my simulation with mef in order to have access to the calculation of the electric field
After that I can calculate

Z=E(x)/H(x) on the different geometries of the model

Best regards Julien
Thank you very much Edgar, I can try to make my simulation with mef in order to have access to the calculation of the electric field After that I can calculate Z=E(x)/H(x) on the different geometries of the model Best regards Julien

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