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eddy current at different frecuencies

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Old   June 2, 2020, 07:29
Default eddy current at different frecuencies
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andrea
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Theory of eddy current frequency
https://cipca.mforos.com/1357867/130...s-frecuencias/
Hello,
I am trying to simulate a magnetic field generated from a coil with a current of 150 mA (solid) with different frequencies to detect defects in metal. I have simulated tree defects of 0.5, 1, and 2 mm of deep. In theory for higher frequencies should be well detected defect smaller, like 0.5 mm, and for lower frequencies should be easy to detect deeper defect, like 2 mm, but when I simulate it is it the opposite. I chose maxwell - solution type - eddy current. How could be?

This is the coil on the top of the sample:

coil on the sample

This is the lateral view:

laterale

The field at 1 mm from the sample with a defect of 2 mm at 1 kHz:

https://cipca.mforos.com/1357867/130...s-frecuencias/

The field at 1 mm from the sample with a defect of 2 mm at 20 kHz:

https://cipca.mforos.com/1357867/130...s-frecuencias/
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