Tapped Inductor in Cuk-Buck 2

Hi there

I am trying to reproduce the recently popularized Cuk-Buck 2 topology in PSIM and facing a little problem with the tapped inductor model. Can anyone please guide me a little. Moreover, I believe Albert was also working on this topology, it would be a great help if you can share your simulation file.

Sahil Chawla

Hi Sahil,

2 circuits attached, one cuk-buck2 has deadtime and some caps parallel to the switches to try and get some ZVS and ZVC, these caps are not really well thought out and need to tuned.

The other cuk-buck 2 is a straight reproduction of his circuit with component values visible from these videos.


https://youtu.be/Wp9WsqAyAKQ- you can see the component values in this video

Dr. Cuk claims a number of things, like 99% efficiency and fast transient response. I don’t see how any of these are true.

Hi Albert

Thank you for your reply.

I am sorry to inform you that I have PSIM version 9.0. Can you please save these schematics to the previous version and attach again?

Thanking in advance.

Sahil Chawla

Hi Sahil,

Please see the attached. Also, if you are a student your instructor can request free teaching licenses:


99% efficiency sounds wonderful but not practical.