• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 82 subscribers
  • Views 724 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS320F28069: Instaspin max conmutation frequency

Borja Gomez88
Intellectual 715 points
Part Number: TMS320F28069

Dear Mr/Mrs,

We want to develop our custom inverter. The controller will be based on Instapin SW (and Texas's uC). We want to use 1200V SiC IGBTs so high commutation frequencies would be desirables. I would like to know what is the maximum PWM frequency for the FOC/MOTION control of Instaspin.

Thank you in advance

Borja Gómez

  • 0
    TI__Guru** 115490 points
    The maximum control frequency can be 20KHz and PWM frequency can be 60kHz if the CPU frequency is 90MHz and the number of event trigger is set to 3.

    You might find more detailed description of instaSPIN-FOC on controller resources.
    www.ti.com/.../spruhi9a.pdf
  • 0 in reply to Yanming Luo
    Intellectual 715 points
    Thank you for the repply.

    May be 60KHz is not too high to manage SiC devices. We usually have worked with Instaspin TMS320F28069 and Si IGBTs. For this case, probably something more powerful is needed (we want a frequencies about 100KHz). I have been revising the Delfino family. These micros are supposed to achive higher frequencies. Is there something equivalent to instaspin for this family of micros?

    Thank you in advance

    Borja
  • 0 in reply to Borja Gomez88
    TI__Guru** 115490 points
    Yes, the Delfino family (TMS320F2837x) has higher CPU frequency to 200mHz, so it's easy to support 100kHz PWM frequency, but it can't support instaSPIN since it doesn't have the instaSPIN core algorithm in its ROM.

    You might try Piccolo F280049C that supports instaSPIN-FOC, you might set the PWM frequency to 100kHz, and control frequency to 20kHz since the number of event trigger can be set to 1~15.