Voltage Regulator Problem

[copyynoo]

Hello, I need to create a voltage regulator that has at the input 220 AC and at the output it should be between [7;15] DC, now I already had my first problems with it, because of the Transformer, I ended up using the "PSPICE MODELING APPLICATION" because I was not sure how to use the K_LINEAR thing, but when it comes to the Model Application I am genuinely not sure how to size the whole thing so that might be where the problem lays but I'm not 100% sure, any suggestions on how can I fix the circuit up until this point?(I also used R2 and R3 because if I didn't use them the simulation would just give me an error saying that the nodes for the source are "floating" even though they were not)

 

[KlausST]

Hi,

I think there is a problem with transformer coupling.

Be sure when doing AC measurement to really use "AC" and get the value as "RMS"
Be sure when doing DC measurement to really use "DC" and get the average value.

Also in your text you wrote 200V AC ... which usually is the RMS value.
But in your schematic you used 220V als amplitude = peak value.
Peak value for a 220V RMS sine is 220V x sqrt(2)

Klaus

 

[scopeprobe]

Hello, I need to create a voltage regulator that has at the input 220 AC and at the output it should be between [7;15] DC, now I already had my first problems with it, because of the Transformer, I ended up using the "PSPICE MODELING APPLICATION" because I was not sure how to use the K_LINEAR thing, but when it comes to the Model Application I am genuinely not sure how to size the whole thing so that might be where the problem lays but I'm not 100% sure, any suggestions on how can I fix the circuit up until this point?(I also used R2 and R3 because if I didn't use them the simulation would just give me an error saying that the nodes for the source are "floating" even though they were not)

View attachment 199122

You are shorting R3 using the GND symbol either side of the transformer which may cause issues
You may need a small series Resistor inline with TX1 output to avoid potential initial condition setup
TX1 Inductance would need to be fairly large for 50Hz