/dist/images/branding/favicon

motor current app accuracy

Discussion in 'ALTA' started by Rolf Ableiter, Mar 2, 2016.

  1. Rolf Ableiter

    Rolf Ableiter Active Member

    Joined:
    Apr 2, 2013
    Messages:
    285
    Likes Received:
    59
    Hi,

    i am a bit confused about the accuracy of the motor current data within the app.
    it shows 20A each motor while hovering (11.5kg).
    with this i would be able to fly about 9 minutes with 20Ah but i flew 12 minutes and loaded 12000mAh in my 20A batteries.
    120A current for hovering 11,5kg is very high. or do i get something wrong?

    best
    Rolf
     
  2. Tabb Firchau

    Tabb Firchau Administrator
    Staff Member

    Joined:
    Jun 28, 2012
    Messages:
    911
    Likes Received:
    472
    Rolf - the app is reporting Phase current, which accounts for your observations. You can check DC current in the data log and also compare to the estimated capacity in the log as well.
     
  3. Rolf Ableiter

    Rolf Ableiter Active Member

    Joined:
    Apr 2, 2013
    Messages:
    285
    Likes Received:
    59
    thanks, Tabb!
    i didn't find DC current in the data viewer when we looked at the data after ESC update. I don't have a PC here in my studio to check again :) only Macs wherever i look :)
    the "real" amp current must be somewhere between 60 and 70A for all motors but i don't want to use a current sensor to check it (for many good reasons :) ).
     
  4. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
    Staff Member

    Joined:
    Jul 31, 2012
    Messages:
    10,383
    Likes Received:
    1,164
    Rolf: The Synapse log files are in .csv file format so you can open them up with Excel if you have that on a Mac.
    Look across the column heading in Row 7, for "Current" (on the log files I have it's column EN).

    Andy
     

Share This Page