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DRV10987: DRV10987 current adjust fail

Part Number: DRV10987


my motor can run in sensorless mode

but in close loop when motor load changed ,current can not adjst

for example mortor turn in 100hz  empty load mode  current is 210ma ;when motor load is changed the curren just adjust to max 300ma then stop the motor , current cannot changed with the motor load .

where i can set the current closed loop?

the DRV10987sheet indicate the max curren is 2a, but even in full speed curren just 500ma, load changed curret just adjst to max about 1a, and stop the motor . in actually the motor rated current  is 1800ma.

how i can adjust the closed loop max current ?

  • user3866315 said:

    Part Number: DRV10987

    my motor can run in sensorless mode

    but in close loop when motor load changed ,current can not adjst

    for example mortor turn in 100hz  empty load mode  current is 210ma ;when motor load is changed the curren just adjust to max 300ma then stop the motor , current cannot changed with the motor load .

    where i can set the current closed loop?

    the DRV10987sheet indicate the max curren is 2a, but even in full speed curren just 500ma, load changed curret just adjst to max about 1a, and stop the motor . in actually the motor rated current  is 1800ma.

    how i can adjust the closed loop max current ?

  • Hi,

    have you followed the DRV10987 tuning guide?

    The motor should be taking more current when the motor is loaded more. 

    Can you read the faults that the device is hitting when the motor is stopping?

    Regards,

    Michael W.