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Periodicity in current carrying coils and DC current with AC current
Posted 2016年2月2日 GMT-5 19:24 0 Replies
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I am trying to simulate a magnetostrictive SAW device, which is energized by ac current (I am applying external current density domains of Magnetic Fields Physics as in www.comsol.com/model/nonlinear-magnetostrictive-transducer-6063). I have applied a large air domain surrounding my device. And I have two problems:
(1) Like a piezoelectric SAW device, I want to make a unit cell of the SAW device, but the problem is in piezoelectric SAW devices (as in www.comsol.com/model/download/275521/models.mems.saw_gas_sensor.pdf), I want to apply a periodic boundary condition, but this time this is not possible (I believe that is because of the air domain). Can you please give me any idea how to solve this problem.
(2) Along with the ac current, I would like to apply a dc current also, and I have no idea, how to do this. I am using frequency domain study.
(3) Lastly, as in the piezoelectric SAW gas sensor, eigen frequency was applied to calculate the resonant frequency, but are there any other method to determine the resonant frequency? Is there any way to calculate the S-parameters?
Thank you.
Khalid
Hello Khalid Ibne Masood
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