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AM13E23019: AM13E230x InstaSPIN FAST maximum FOC loop rate

Ray
Prodigy 30 points

Part Number: AM13E23019

Hi,

I’m trying to compare AM13E230x InstaSPIN FAST performance against C2000 devices such as F28003x, F28004x, F280013x, F2837x, and F28P65x. 

-What full FOC ISR rates are realistic on AM13E230x when running FAST every ISR: 40 kHz, 50 kHz, 60 kHz, or 80 kHz? 

-How does AM13E230x FAST performance compare against the C2000 devices listed above? 

-Which TI device is currently the fastest option for sensorless InstaSPIN FAST FOC if the goal is the highest full observer + current-loop rate? 

Thanks,
Ray

  • 0
    TI__Intellectual 1120 points

    Hi Ray,

             Instaspin on AM13E230x can be executed within 7uS giving 30% CPU bandwidth for housekeeping, even for 100KHz FOC. F28P65x can offer much superior rate but eventually it depends on how much CPU loading is required apart for FOC/Motor Control

  • 0 in reply to Venkata Pavan Mahankali
    Prodigy 30 points

    Hi,

    Thank you. I want to clarify one critical point because my question specifically concerns the full observer rate.

    At the stated 100 kHz FOC rate, is the complete FAST estimator executed on every 10 µs interrupt, with no estimator or trajectory decimation?

    Also, does the stated 7 µs include the complete interrupt path, including ADC handling, Clarke/Park transforms, FAST, current PI controllers, inverse Park, SVPWM, PWM register update, and interrupt entry/exit?

    If FAST is decimated relative to the 100 kHz current loop, what are the respective PWM, current-loop, and FAST estimator frequencies used for the 7 µs measurement?

    Thanks,

    Ray

  • 0 in reply to Ray
    TI__Intellectual 1120 points

    Hi Ray, on AM13E2x MC-SDK our ISR for Fast observer including end to end FOC ADC read to SVPWM is executed within 7uS.