II. How To Use ATILA

4.1 Rosen Type Transformer (Homework 6)
Step-Up Ratio


PROBLEM - Rosen Transformer 25 mm x 8 mm x 2.2 mm t


  • Depending on the external load, the step-up voltage ratio is different.
  • Learn the external load application
1.
Obtain the admittance curves around the first resonance frequency (71 kHz) under the external resistance load for 1 GW (almost open) and 1 MW. Show the resonance frequency shift and the peak broadening, then explain the reason briefly from the physical viewpoint.
2.
Calculate the output voltage under the external load (instead of Floating Condition) from 1 kW to 1 GW under the 1 V input voltage and the frequency (71 kHz) fixed. Draw the step-up voltage ratio as a function of load in a log-log graph.
3.
Calculate the output voltage under the external load from 1 kW to 1 GW under the 1 V input voltage fixed at the peak frequency. Draw the step-up voltage ratio as a function of load in a log-log graph.
4.
Calculate the output power under the external load, and show that the maximum is obtained at the load which corresponds to the impedance of the transformer output (Impedance Matching).

 
HINT:

BOUNDARY CONDITIONS
Potential

Data -> Conditions -> Surfaces -> Loaded Potential: Resistance from 1000 to 1000000000 -> Assign the right side surface

Load assignment Admittance curve under 1 GW load
Step-up ratio versus load resistance Admittance curve under 1MW load