Hi everyone,
I´m working on a interleaved three-cell boost converter. During the start-up process I test all the bridges in open loop achieving good results.
Then, I close the loop just with one cell and worked fine.
When I try to perform conventional interleaved (using RTBox, no C2000), several problems arise such as I can not link a C-code with each triangular signal.
When I try to add another cell and do interleave, it appears problems with the syncronization of the carriers with phase shift. A shortcut occurs in the instant the I close the loop, and only one of the cell have current.
Have anyone worked on a similar converter, or in an interleaving type and can help me or give me any tips?
Thank you anyway.
Hi alfmanper, are you able to share your model? That would make it easier to help understand the challenge you are facing.
In the meantime here are a few models that use an interleaving:
- demo model “Single-Phase Battery Charger” uses an interleaved boost PFC
- application example PFC Converter and Controller | Plexim (again an interleaved boost PFC)
- demo model “STATCOM Cascaded H-Bridge Converter“ - uses interleaved H-bridges
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Hi Munadir,
Thanks, i’ll look this demos.
In case, I attach you my model.
2Boost_interleaving.plecs (211.6 KB)
Thanks for sharing the model. Couple of things that popped out straight away:
- repeating cells: so it appears that your DC/DC module are repeated. consider using a model reference block to prevent yourself from having to update each block anytime you need to make a change. With references you only need to make changes to the base module and all other modules that refer to the base module are updated automatically.
- consider using nanostep modules, PWM outputs and capture module, and ADC modules. Have a look at the RT Box demo models “Multiphase Buck Converter” and “Boost Converter”. Those might be good starting points for you. With RT Box1 you have able to model up to 3 boost converters on RT Box1 using the nanostep solver.