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DRV8462: Auto Torque setting units in the GUI

Fabio Gou
Expert 4445 points
Part Number: DRV8462

Tool/software:

What is the unite for the initial learning current? mA or what?

The same question is for ATQ_TRQ_MIN, Auto Torque Count Lower Limit.

What is the unit?

  • 0
    TI__Mastermind 44755 points

    Hi Fabio,

    The values marked in yellow in the below snippet are current scaling factors for the set motor current based on VREF voltage. Current IFS (A) = VREF (V) / KV (V/A). These values are 8-bits wide, 0 will correspond to 1/256 x 100% of the set current and 0xFF or 255 will correspond to 256/256 x 100% of the set current. For the initial learning current this scaling factor is calculated as = ATQ_LRN_MIN_CURRENT (register value) * 8. 

    Auto torque initial learn current scaling factor (ATQ_LRN_MIN_CURRENT (register value) * 8) must be > ATQ_TRQ_MIN scaling factor and (Auto torque initial learn current scaling factor + Current steps to learn) must be < ATQ_TRQ_MAX scaling factor. 

    Regards, Murugavel