orcad, psipice and viper27L

[abreiteneder9]

Posted on August 18, 2016 at 16:47

Hello,

I've a problem using the Viper27L/Viper17L Spice Model in Orcad 17.2 Lite. I make the same circuit that edesign. I start the simulation and I get no simulation data for marker.

I used vpulse (not vdc) and k_linear.

Any hints?

Thanks

Andrés

[Patrizia BELLITTO]

Posted on August 19, 2016 at 09:14

Hello,

I'm forwarding your issue, we'll answer you as soon as possible.

Best regards,

Patrizia Bellitto

eDesignSuite developers team

Posted on August 23, 2016 at 19:24

Hello,

any news?

Thanks in advance.

[Patrizia BELLITTO]

Posted on August 24, 2016 at 10:14

Sorry but the colleague who could answer you is still in vacation. 

I'll contact him as soon as he comes back.

[Nickname6829_O]

Posted on August 31, 2016 at 12:14

Hello Andres,

we know that OrCAD v17.2 has a bug that does not allow to save the simulation data by selecting the option ''At markers only''. Are you using these settings? If yes, try to save the waveforms by using the option ''All but internal Subcircuts'' in the simulation settings.

If you still experience the same problem, please send me the complete project you are trying to simulate, I will have a look to it and come back to you.

Best Regards,

Carmelo

Posted on September 06, 2016 at 16:22

Hello Carmelo,

Thanks for your help. I had that configuration. I send you a zip. The project issimulacion_fuente.zip\simulacion_fuente\orcad\fuente.opj

Best regards

Andrés

________________

Attachments :

simulacion_fuente.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzDv&d=%2Fa%2F0X0000000bIZ%2FmVJqW6AE6DGTiAqci.P5yXpXw7GVmAJvKdkXW.WZ1fE&asPdf=false

[Nickname6829_O]

Posted on September 07, 2016 at 16:41

Hello Andres,

I had a look at your design.

Firstly, I noticed that the simulation was not starting correctly because to use this model it is necessary to set the option ''Initialize all flip-flops to:'' to 0 in the simulation profile (see slide #1 of the pdf attached). The usage instructions were missing in this model, I apologize for that.

Then I found out that the transformer model E30_15_7_3C90 was not working correctly, causing convergence problems. I tried to run a simulation by replacing the model of the VIPER27 with a simple switch controlled by a VPULSE with constant duty cycle and I did not obtain the expected results (output voltages were not rising).

I was able to simulate the circuit by replacing E30_15_7_3C90 with the K_Linear part from analog lib. You find all the updates in the attached project.

If you should have convergence problems I suggest you to set the Speed Level to 4 and to set the auto-convergence option in the simulation profile (see slide #2).

Finally inside the folders VIPer17_ORCAD and VIPer27_ORCAD you can find the latest versions of the models. They contains only minor changes.

Feel free to contact me for further problems/clarifications.

Best Regards,

Carmelo

________________

Attachments :

SIM_SETTINGS_ORCAD.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzBp&d=%2Fa%2F0X0000000bIb%2F6.ZWr46sh0gGg5bCqC54GWwibEKfe4OfWY9VGdDof.Q&asPdf=false

simulacion_fuente_ST_update.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzDz&d=%2Fa%2F0X0000000bIa%2Fkv2VvPgnAyWRUWqFkLnk3lTG5KHoE.IExn9eM4__oeU&asPdf=false

Posted on September 08, 2016 at 17:34

Hello Carmelo,

Thanks you for help

Unfortunately I have the lite version (75 nodes limit) so I cannot simulate the design.

Is there an option to export the viper pspice model to use it in Ltspice? or Altium?

Best regards

Andrés

[Nickname6829_O]

Posted on September 15, 2016 at 09:24

Hello Andres,

unfortunately we don't have a version for LTSPICE or ALTIUM. We could schedule the implementation of the model for LTSPICE. Do you need it in short time?

Best Regards,

Carmelo

Posted on September 19, 2016 at 16:28

No, it's not necessary, but if i could have it as soon as possible it would be better. Thank you.

[Nickname6829_O]

Posted on September 21, 2016 at 14:20

Hi Andres,

I'll try to provide you the model by the end of next week. Are you interested in the VIPER27L?

Regards,

Carmelo