I am a newbie in power electronic field. I have a flyback converter which I cannot get the desired result from the simulation in Pspice. I am not sure if the problem is from the transformer or the switching.

The circuit is supposed to convert a 3.7 VDC from a Battery to 200 VDC.

I am using the following parameters for the circuit:

Cin=4.2uF

Chv=0.22uF

The Transformer Parameters would be as followed:

L1=6.2uH

R1=1 Ohm

L2=300uH

R2=42.7Ohm (R1 and R2 are supposed to be the winding resistance)

right now I get 90 VDC regardless of whatever change I make I my circuit (changing the turn ratio, changing the input voltage)

I have tried to simulate it in MatLab simulink and I get the same result.

Could you please help me figure out where the problem is and why I cannot get the 200VDC output?