II. How To Use ATILA

4.2 Ring-Dot Type Transformer (3)
PROBLEM TYPE VIEW RESULTS


PROBLEM - Ring-Dot Type Transformer with PZT8, INPUT: Ring = 20 mm outer f - 12 mm inner f x 1 mm t, OUTPUT: Dot = 10 mm x 1 mm t


  • We use Modal Analysis to find the first resonance frequency, then use Harmonic Analysis to obtain the Impedance curve.

PROBLEM TYPE

Data -> Problem data -> 3D, Modal Resantires, Number of Modes 30

CALCULATION

Calculate -> Calculate window -> Start

POST PROCESS/VIEW RESULTS
Click for Opening the Post Calculation (Flavia) Domain

Click for obtaining all the Resonance and Antiresonance frequencies. The first 6 modes are trivial translation modes (very low resonance frequencies). The first high Coupling coefficient 31% can be found at 24. 131 kHz, which corresponds to the first meaningful electromechanical resonance.

PROBLEM TYPE

Data -> Problem data -> 3D, Harmonic, Click both Compute Stress and Include Losses

FREQUENCY

Data -> Harmonic -> Interval 2 (120000-140000 Hz)

CALCULATION

Calculate -> Calculate window -> Start

POST PROCESS/VIEW RESULTS

Click for Opening the Post Calculation (Flavia) Domain

Click Admittance/Impedance Result
Admittance Peak Point : 130000 Hz -> This peak corresponds to the First Resonance

Admittance Curve

View Animation - Vibration Mode at a Particular Frequency

View results -> Default Analysis/Step -> Harmonic-Magnitude -> Set a Frequency
(Peak Point : 130000 Hz for Resonance Mode)
Double Click Loading frequency: 130000 Hz Harmonic Case -> Click OK (Single Click and Wait for a while!)

Set Deformation -> Displacement

View results -> Deformation -> Displacement
Other parameter than Displacement
Set Results View -> View results -> Contour Fill -> Electric Potential or Von Mises Stress
After setting both “Results view” and “Deformation” -> Click to see the Animation
130000 Hz - First Resonance
Under 1 voltage applied on the Ring input portion, we obtain 30 V on the Dot output portion -> Step-up voltage ratio under no load (open) is 30.
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