Hi,
I see you have tried to introduce delays. Since you say it can only be solved in a loop (so it is not possible to solve the loops manually), then try to check the inital guess. Here i copy what is highlighted in the documentation:
Create Initial Guesses Using the IC and Algebraic Constraint Blocks
Your model might contain loops for which the loop solver cannot converge without a good, initial guess for the algebraic states. You can specify an initial guess for the algebraic state variables, but use this technique only when you think the loop is legitimate.
There are two ways to specify an initial guess:
- Place an IC block in the algebraic loop.
- Specify an initial guess for a signal in an algebraic loop using an Algebraic Constraint block.
Hope it can help you!
