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  • TI Thinks Resolved

TINA/Spice: Simulation issues

Tool/software: TINA-TI or Spice Models

I am trying to implement the following circuit which is a model of EMI filter but it is showing error message as in the screenshot below. So let me know what I am supposed to do. (for below circuit)

Sometimes I also get message as floating node when implementing some other circuit randomly. (Not for below circuit)

I want to know whether it is necessary to put a ground to the circuit isolated by coupled inductor coils or transformer with AC supply? If yes, then where do I have to place as AC supply polarity keeps changing. (Not for below circuit)

  • Please attach your TSC file so we can have a look.

    Nikhil Gupta | Product Folder Modeling                                                                                                                                                    

    All TI Spice Models can be found here | New to TINA-TI? Its a free spice simulator! Try out this short Video Training Series

     

  • In reply to Nikhil Gupta (Online Design Tools):

    t10.TSC

    I have attached the TSC file for the schematic screenshot sent in the previous post.

  • In reply to jayanth pasumarthi:

    Jayanth,

    Yes, you will have to add a ground node. You can add it to either side of the inductor N2. 

    The issue arises from the fact when you do DC analysis, inductors are treated as short and capacitors are treated as open. So in your schematic without a GND, there is no return path to GND since C5 and C2 will be open.

    Nikhil Gupta | Product Folder Modeling                                                                                                                                                    

    All TI Spice Models can be found here | New to TINA-TI? Its a free spice simulator! Try out this short Video Training Series

     

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