How to Resolve the error message coming in PSIM after loading IGBT Thermal model? One of the output values is out of the numerical range. This is most likely caused by a division operation where the denominator is 0.

Ans Alias
Ans Alias Altair Community Member
edited October 21 in Community Q&A

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Answers

  • VSiddhartha
    VSiddhartha
    Altair Employee
    edited October 7

    Hi,

    The IGBT Thermal model is created by you, or you have selected the existing one?

    Thank you,

    Vishwanatha Siddhartha 

  • Ans Alias
    Ans Alias Altair Community Member
    edited October 7

    Yes the model is created by me. Thermal IGBT Model.

  • VSiddhartha
    VSiddhartha
    Altair Employee
    edited October 7

    1. Is the IGBT model is with anti-parallel diode or without anti-parallel diode?

    2. Whatever may be the model (with/without diode) if it has device xml in plecs, you can convert it to PSIM model by using following articles:

          (i) https://community.altair.com/community/en/converter-for-thermal-device-xml-files-from-plecs-to-   psim?id=kb_article_view&sysparm_article=KB0124054

          (ii) https://community.altair.com/community/en/how-to-import-thermal-device-xml-files-to-psim?          id=kb_article_view&sysparm_article=KB0124132

     3. There is no plecs model available online and the IGBT model is without anti-paralleled diode, then this problem may exist. We already identified this bug and dev team working on it. Meanwhile, there are ways to develop proper PSIM model

               (i) Just make anti-parallel diode as open always. To do this use the Vf vs If characteristics of diode in device database editor. 

     

    Thank you,

    Vishwanatha Siddhartha

     

  • Ans Alias
    Ans Alias Altair Community Member
    edited October 17
    Vishwanatha Siddhartha said:

    1. Is the IGBT model is with anti-parallel diode or without anti-parallel diode?

    2. Whatever may be the model (with/without diode) if it has device xml in plecs, you can convert it to PSIM model by using following articles:

          (i) https://community.altair.com/community/en/converter-for-thermal-device-xml-files-from-plecs-to-   psim?id=kb_article_view&sysparm_article=KB0124054

          (ii) https://community.altair.com/community/en/how-to-import-thermal-device-xml-files-to-psim?          id=kb_article_view&sysparm_article=KB0124132

     3. There is no plecs model available online and the IGBT model is without anti-paralleled diode, then this problem may exist. We already identified this bug and dev team working on it. Meanwhile, there are ways to develop proper PSIM model

               (i) Just make anti-parallel diode as open always. To do this use the Vf vs If characteristics of diode in device database editor. 

     

    Thank you,

    Vishwanatha Siddhartha

     

    Hello Viswanath,

    Thank you for your response.

    I would like to know what you mean by the thermal model having with/without Antiparallel diode. I used the model marked as in green below. Is it the model without antiparallel diode?

    image

     

  • VSiddhartha
    VSiddhartha
    Altair Employee
    edited October 17
    Ans Alias said:

    Hello Viswanath,

    Thank you for your response.

    I would like to know what you mean by the thermal model having with/without Antiparallel diode. I used the model marked as in green below. Is it the model without antiparallel diode?

    image

     

    Hi,

    You have to select New IGBT. It's correct option you have chosen.

    My question is that the datasheet of the device has the information about anti-parallel diode?

    With or without (This information is from datasheet of the device) anti-parallel diode, you have to select "New IGBT". Further process is as explained in previous reply.

    Thank you

    Vishwanatha Siddhartha

  • Ans Alias
    Ans Alias Altair Community Member
    edited October 17
    Vishwanatha Siddhartha said:

    Hi,

    You have to select New IGBT. It's correct option you have chosen.

    My question is that the datasheet of the device has the information about anti-parallel diode?

    With or without (This information is from datasheet of the device) anti-parallel diode, you have to select "New IGBT". Further process is as explained in previous reply.

    Thank you

    Vishwanatha Siddhartha

    Hello,

    The IGBT we selected have antiparallel diode. Vf-If Chara- is available in datasheet of IGBT.

    All points are entered as per datasheet as shown below. 

    image

    But while verifying the switching losses I am getting an error message as shown below. Have any idea on this?

    image

  • VSiddhartha
    VSiddhartha
    Altair Employee
    edited October 21
    Ans Alias said:

    Hello,

    The IGBT we selected have antiparallel diode. Vf-If Chara- is available in datasheet of IGBT.

    All points are entered as per datasheet as shown below. 

    image

    But while verifying the switching losses I am getting an error message as shown below. Have any idea on this?

    image

    Hi,

    Can you check the .xml file of created IGBT?

    I suspect that the Eon vs Tj, Eoff vs Tj curves defined at Ic=0A. 

    if that is the scenario, please follow the steps

    1. open device xml file in "Edit in notepad".

    2. Search for Eon vs Tj, Eoff vs Tj section, change Ic=0 to datasheet mentioned value.

    3. save and close.

    4. restart psim and check once.

     

    Thank you,

    Vishwanatha Siddhartha

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