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TMS320F28375S-Q1: switching complimentary pwm signals between ePWM channels

Ryan Collin
Prodigy 240 points
Part Number: TMS320F28375S-Q1

Hello,

I am wondering if it is possible to operate the ePWM peripheral in complimentary half bridge mode with dead time for channels that are not paired?

For example, I can operate ePWM6A and ePWM6B in complimentary half bridge mode with dead time between the two PWM signals. Can I do the same for, say, ePWM6A and ePWM7A?

Thanks!

  • +1
    TI__Mastermind 20876 points

    Hi Ryan,

    I believe you can achieve this with synchronization between epwm6/7 and making sure epwm7 has the same period/duty cycle as epwm6a. Then applying the same deadband you did for epwm6, but on epwm7a.

    What is the waveform you are trying to generate?

    Best,

    Ryan Ma

  • 0 in reply to Ryan Ma
    Prodigy 240 points

    Thanks, I will give this a shot. I am building a 3 level T Type inverter, but I would like the option to run it as a two level inverter to compare performance. For three level, a power switch is complementary to one of the neutral leg switches, where in two level mode the half bridge power switches are complementary.