Compare two values in a algebraic loop/Loss scaling of an electrical machine

Hello,

i want to compare two signals each in form of a double value. More specific, the second signal should go into the previous cycle where the first signal acts as a start value. I honestly don't know how to realise this issue. Maybe it's not exactly clear what my goal is. I want to scale the losses of an electrical machine. The starting point is a calculated power loss and i want to update this value until the thermally steady state. Maybe anyone could help. Thanks in advance.

[Paresh yeole]

Put a unit delay and initialize the initial value to 95.

[Lennard Schulze]

Which value should i consider for the delay length? The inital condition is 95.

[Paresh yeole]

Between PV neu and PV alt add a delay (may be a unit delay (==delay length)).

Set the initial condition of the unit delay to 95.

[Lennard Schulze]

you mean like this?

[Paresh yeole]

Yeah.

[Lennard Schulze]

Got this error:

An error occurred while running the simulation and the simulation was terminated

Caused by:

• Derivative of state 'thermal_network_PMSM_neu.Subsystem.Thermal_Mass.T' in block 'thermal_network_PMSM_neu/Subsystem/Thermal Mass' at time 600.0 is not finite. The simulation will be stopped. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)

Component:Simulink | Category:Block error

[Lennard Schulze]

These are the two subsystems. mod 1 ist the first one and mod 2 the second one.

[Paresh yeole]

I don't think that the problem is from the subsystem which you have mentioned in the images.

The problem is in the signal fed to derivative block (which is not in the images)

[Lennard Schulze]

I don't know which block you exactly mean.

[Lennard Schulze]

Maybe it's not exactly clear what my goal is. I want to scale the losses of an electrical machine. The starting point is a calculated power loss and i want to update this value until the thermally steady state.

[Lennard Schulze]

Moreover i have no derivative block.