Why am I getting a different response between real time simulation and VHIL? Also between 2024 and 2025 Typhoon versions

Question

Hi,

 

I am working on a Typhoon HIL simulation: it consists on a DAB converter in Open Loop: file attached to this message.

 

It was working properly in real time simulation as shown in the next pictures with Typhoon version 2024. Since there is a newer version 2025, real time simulation in version 2024 is not running anymore: only in virtual HIL and it continues working correctly.

 

When running the same simulation in real time but in version 2025, the pictures do not match with the proper DAB behavior as before, on version 2024. Only in virtual HIL it seems a more similar behavior and I do not understand why. I have compared Typhoon configuration parameters between versions in order to find any difference but it seems similar.

 

So I have two questions: is possible that simulation works different between versions? Is possible that simulation works different with real time or virtual HIL? 

Answer 1

Hi Pablo,

From what I see in the image, you used IGBT single switch components to build your converter. These should not be used for building of converters. Please refer to HIL Fundamentals course on HIL Academy (https://hil.academy/courses/hil-fundamentals/).

Other than that, I would advise you to take a look at the existing DAB examples in the example library, under "general power electronics" section.

Best,
Jovan