simulink ode error message

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mado
mado on 7 Oct 2012
i am applying pwm on dc/dc converter I connected between simulink element and semipower element bu voltage controlled source ,and select ode45 with variable step but it gives bad response so i used ode fixed step but it gave this error message
" Derivative input 2 of 'chee_pv/boost converter1/powergui/EquivalentModel1/State-Space' at time 6.750000000000001 is Inf or NaN. Stopping simulation. 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)."

Answers (2)

mado
mado on 7 Oct 2012
any help ?? errors came when i connect the controlled voltage source to last stage.

Sulaymon Eshkabilov
Sulaymon Eshkabilov on 5 May 2019
Hi,
Maybe you can try to adjust the relative and absolute error tolerances via solver options or simset('reltol', value, 'abstol', value). It is a bit difficult to suggest any idea without seeing your model itself though.

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