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TMS320F28027: PWM frequency settings

Sam Chen79
Intellectual 390 points
Part Number: TMS320F28027
Other Parts Discussed in Thread: MOTORWARE

Hi,

In motorware, would it be possible to change the PWM frequency after initialization and while on the fly/motor runs?

If yes, how to do so?

Thank you.

  • 0
    TI__Genius 17175 points
    No, in general it cannot be done as the CTRL time base is set by the PWM freq. Changing it on the fly can lead to unexpected outcomes on the voltage/current waveforms and loss of efficiency.

    It may be possible to do if you instead use a timer module as the CTRL time base, but we do not offer any examples of this and in general do not recommend this practice

    Sean