Learning Forum

[Andrew]

Hi 

I am working on magnetics simulation where I am simulating ferrite core transformer.I am calculating core losses and copper losses.Everything is working fine but one thing i noticed is that magnetizing current is not going in negative cycle however my excitation waveform is +/- 800V (50kHz) 

I have attached pictures of both voltage excitation as well as magnetizing current as well.

[GLUO]

Hello,

It seems like the current did not reach a steady state. Could you increase the time step and the end time to see if the current goes to negative later?

GL

[Andrew]

Hi,

I have seen that with inreased time steps as well it does not change anything. And changing simulation time will increase only number of cycles.

Andrew

[GLUO]

Hi,

I saw some similar cases, and usually the time constant is large, it took very long time to reach the steady state. If you can confirm it reached steady state, could you do a test run with a linear core material and see if the current is correct?

GL