Transient Analysis fails: Timestep too small

[hawkeye11]

I am using MultiSim 12.0

I am trying to run the example given inside the package.

When I tried to simulate the Buck Converter given in examples, it does not converge. I have tried all forums and made all possible changes in the simulater, but problem does not seem to go away.

Please help me with this asap.

[OStep]

That circuit is configured for AC analysis for the purposes of calulating loop gain. It is not meant to run under transient analysis.

If you want to run a transient simulation using an average model of a buck converter, use the slightly modified circuit attached.

Thanks

[zxz]

Hi everyone , can anyone help me please? i get same error , and i cant plot the 2 Curves V(1) Eingang , and V(4) Ausgang --- time ( Transient analyse) , the Grenzfrequez ( limitfrequency is : 828.77Hz

what am i doing wrong and how can i do it right please?

thanks

[Miguel_V]

Hello,

Your opamp isn't powered. There is no connection to the V+ and V- terminals. Take a look at your modified file.

Regards,

[Mishung]

Hello, I am trying to run an analysis of this analog VCO circuit but I keep getting the "Timestep is too small" error.

Any sugestions? 

Messing aroung with timestep value did not help.

[Mishung]

ahh, I had the Vdd instead of Vss on IC4, nevermind 🙂

[aandalv]

I am using MultiSim 12.0

I am trying to run the example given inside the package.

When I tried to simulate I get this: "A simulation error has occurred. Would you like to run the Convergence Assistant to attempt to resolve this problem automatically?". But the assistant doesn't revolve the problem.

I get this error: "Timestep too small. Tran simulation canceled".

I have tried all forums and made all possible changes in the simulater, but problem does not seem to go away.

Please help me.

[OStep]

Hi,

I am simulating your circuit "Primero.ms12" in version 12 of Multisim and I am not getting any convergence problems.

[kb9812]

Hello,

I am having the same issue with Multisim telling me that my timestep is too small. I believe that this is because sometimes the wires do not connect to the components, which I have noticed.

Note: I am still in the process of figuring out the circuit, but the goal is to create a counter that goes from 0 to 80 and counts due to the press of a button rather than a clock and has a reset to 0. However, I need to solve the timestep too small error before I can continue adjusting my circuit.

[kb9812]

I accidentally put my old file in my comment- here is the correct one.