An error occurred while running the simulation and the simulation was terminated due to singularities in my Simulink model?

Caused by:

• Derivative of state '1' in block 'pmsm_ini_dc_bus/PID Controller/Integrator/Continuous/Integrator' at time 11.00046 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)

Answer 1

[Salman Ahmed]

Hi Yernagu,

This problem occurs oftenly. This is usually caused because of Inf or NaN output produced at a block. Set the diagnostic "Inf or NaN block output" to error in the configuration settings. If this is the issue, you will get the error as follows:

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

Caused by:

• Block 'BlockName' outputs 'NaN' for element x of output port x at major time step 0

where BlockName is the block in which error is thrown.

You can debug your model from there to bypass NaN or Inf values from reaching the integrator.