Motor model failed to convege error

So, I have this Simulink EV model using the simscape library and am using the Motor & Drive (Syatem Level), but when i try to input power and torque over a certain treshold the model won't simulate and points to this failed to converge error.

An error occurred during simulation and the simulation was terminated

Caused by:

['EVmodel32024a/Solver Configuration']: Transient initialization at time 1.022823557191944, solving for consistent states and modes, failed to converge.

Nonlinear solver: failed to converge, residual norm too large.

Here is the set of components with unconverged equations:

'EVmodel32024a/Motor & Drive (System Level)'

Equation location is:

'ee.electromech.motor_and_drive_base'(no line number info)

Equation location is:

'ee.electromech.motor_and_drive_base'(no line number info)

Equation location is:

'ee.electromech.motor_and_drive_base'(no line number info)

Component:Simulink | Category:Block error

that's the error log.

At 150 kW and 360 n*M it works fine, but when I tries to input 300kW and 720 n*M it brokes.

Also couldn't make the intermittent over-torque option word.

Answer 1

[Divyanshu]

Hello @Gabriel,

I tried to simulate the model by changing the input to 300kW and 720 n*M but for me it is simulating successfully without any issues.

However, to troubleshoot the issue at your end you can try the following steps:

• Reduce the maximum time step to see if a smaller time step helps the simulation converge.
• Consider adjusting component parameters such as ‘Open resistance’ or ‘Closed Conductance’ that make the model more realistic and less ideal.
• Switch your solver and increase your tolerances, for example if you are using 'Variable Step Auto', try 'ode23t' and if your consistency tolerances are 1e-5 try increasing to 1e-3 in solver configuration.
• Use the Solver Profiler to determine what the solver is doing just before you receive the error. In the step size tab, you should see a graph showing the step spike down as it approaches the time of the error occurring.
• You can refer this MATLAB answer post for more information.