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TMS320F28377S: PWM Phase Synchronization.

SY Yoon
Genius 3381 points
Part Number: TMS320F28377S


Hi,

I have a question about start points of phase shift.

I want to make PWM waveform like below. 

Each PWMs have 120deg phase.

PWM1 is master, and slaves don't start until phase are reached. 

Figure 14-71 in TRM, 

The PWM output appeared in the red box.

I want the slave's waveform to be output from when the counter is zero.

  • 0
    TI__Mastermind 25230 points

    Hi SY Yoon,

    SY Yoon said:
    and slaves don't start until phase are reached. 
    SY Yoon said:
    I want the slave's waveform to be output from when the counter is zero.

    Just to clarify, you would like to have the output low until the phase is achieved, is this correct? If so, there is no native way to configure this in the ePWM module, you will need to change your action qualifier settings to do nothing or output low until you provide the initial sync signal for epwm 3. 

    Best Regards,

    Marlyn