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Original question:

UCC21530: Inverter output problem with Sine PWM technique using TINA TI

UCC21530: I'm having trouble simulating the output of the inverter Tina TI

Vempuluru Venkata Poorna Sekhar
Prodigy 190 points
Part Number:

Hi,

I simulated inverter circuit with SPWM technique in TINA-TI.

VGS3 is not the desired output,can you please look into it.

And is what is happeing with vout.

Iam attaching related images and files required.

A quick reply would be appreciable.

thank you.

Poorna Sekhar 4137.inverter.TSC

  • 0
    Prodigy 190 points
    Vempuluru Venkata Poorna Sekhar said:

    Part Number: UCC21530

    Hi,

    I simulated inverter circuit with SPWM technique in TINA-TI.

    VGS3 is not the desired output,can you please look into it.

    And is what is happeing with vout.

    Iam attaching related images and files required.

    A quick reply would be appreciable.

    thank you.

    Poorna Sekhar 4137.inverter.TSC

  • 0
    Prodigy 190 points

    and please check the current in load it should be a symmetrical sinusoidal wave. 6765.inverter.TSC

  • 0
    TI__Prodigy 650 points

    Hi Poorna,

    Thank you for your question. I work on the applications team in the high power drivers group.

    I'd first choose a stronger bootstrap diode (D6 and D3). 100V breakdown voltage is not sufficient for the 100V bus voltage you are trying to simulate. Using the 1200V SiC FETs without negative turn off voltage may be causing miller induced noise that adversely affects your waveform. I'd suggest using lower voltage FETs with a lower bus voltage in addition to the stronger bootstrap diode for better results.

    If this answered your question, could you please press the green button? If not, feel free to ask more questions.

    Thank you and best regards,
    Zachary