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TMS320F2800157: InstaSpin Observer query

Dev Chandil
Prodigy 210 points
Part Number: TMS320F2800157


Hi Team,

I have following queries related to Observer in Instaspin Framework for BLDC control:

1. What are the tolerances for observer in Instaspin Framework?

  • 0
    TI__Guru** 116090 points
    Dev Chandil said:
    1. What are the tolerances for observer in Instaspin Framework?

    What do you mean the tolerances? The resolution of the estimated angle and speed are related to the current and voltage signals, motor electrical parameters like Rs, Ls and Flux. The better signals and the precise motor parameters will improve the performance of the motor control with sensorless FOC includes using FAST estimator.

  • 0 in reply to Yanming Luo
    Prodigy 210 points

    Hi Yanming,

    I think I did not explain my query correctly. In Instaspin the solution predicts the Resistance, Inductance and other motor related parameters. If there is any difference in the estimated values and the predicted values, what is the effect of this on the motor working. Also, what is the maximum possible error or tolerance for this prediction?

  • 0 in reply to Dev Chandil
    TI__Guru** 116090 points
    Dev Chandil said:
    If there is any difference in the estimated values and the predicted values, what is the effect of this on the motor working.

    As mentioned above. It's also related to the current and voltage sensing circuit on your board.

    Dev Chandil said:
    Also, what is the maximum possible error or tolerance for this prediction?

    Sorry, we don't have a specific data can be shared with you.