simulink ode error message

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mado
mado 2012-10-7
回答： Sulaymon Eshkabilov 2019-5-5
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)."

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回答（2 个）

mado
mado 2012-10-7
any help ?? errors came when i connect the controlled voltage source to last stage.
Sulaymon Eshkabilov
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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