Motor control

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

How to configure complementary Mode PWM pulse?

I am using TMS20F28035 Piccolo controller borad.

 

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Answers

  • Isi Matalon_22265
    Isi Matalon_22265 New Altair Community Member
    edited February 2018

    In the ePWM block you need to enable the deadband. You should set the delay mode, the rising and the falling edge value according to your preferences. If you want no deadband keep the values at 0 but I would recommend using it to protect the converter. What is important is to set the polarity to 'Invert Falling Edge Delay on B' and for Input Select DbA in=PWMA, DbB in=PWMA. This way you are inverting the signal of PWMB and both PWMA and PWMB share the same input which is of PWMA (this means you don't need to connect PWMB as it is being triggered by PWMA). Also make sure to set the triggers for PWMA under CMPA.

     

    image.png.d5818591cac9d9ca3b848c1d459823d0.png

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Hi... Using a potentiometer to emulate the inductor/primary current is not the best way to test this. I would like to suggest referring to the Digital Power training Kit software and documentation for correct usage.

    http://percentagescalculator.com/

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