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TMS320F28055: I have a problem with Sine analyzer

Kiselev Dmitry
Expert 1400 points
Part Number: TMS320F28055
Other Parts Discussed in Thread: CONTROLSUITE

I use DPlib Sine analyzer. In graph, I attached, sine wave that input in Sine analyzer. Sine analyzer invoke at 10000 Hz. Threshold is 0.1. Sine fetching frequency at 80000 Hz.

Problem is a not stable result of out parameters. For example, the frequency constantly jumps between bandb 98 - 102 Hz. Vrms and Vavg have same problem. This introduces instability into the operation of the feedback current loop.

How can I solve this problem?

Dlogger

It's my oscilloscope viewing sine

  • 0
    TI__Mastermind 43730 points
    I am not sure which version of the sine-analyzer you are using, we added some filters in the sine analyzer to mitigate these issues.

    C:\ti\controlSUITE\development_kits\tidm_1000\v1_01_00_00\f2837x\pfc3phvienna

    please look at the updated module in the code pointed to above.