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    How is the value of motor torque (OTR) obtained in the ATV320 drive?

    Issue:   
    How is the value of motor torque (OTR) obtained in the ATV320 drive?
     
    Product Line:   
    ATV320
     
    Environment:  
    All
     
    Cause:   
    Wants to know how motor torque monitoring is achieved. Is it measured or estimated
     
    Resolution:   
    On ATV320, this parameter will be estimated (the torque is estimated based on motor current measured).
    The torque of motor is not measured by the drive. It is calculated from the measurement of motor
    current.
    OTR = (Iq / Iqn) * (PhirdRef / Phirn) in %
    With: Iq : Current torque provide by the command to drive motor
     PhirdRef : Flux provide by the command to drive motor
     Iqn : Nominal Current torque compute with the motor name plate
     Phirn : Nominal flux of the motor

     

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