Short circuit Battery protection/motor; problem

Discussion in 'General Electronics Chat' started by Vindhyachal Takniki, Aug 6, 2015.

  1. Vindhyachal Takniki

    Thread Starter Member

    Nov 3, 2014
    348
    6
    1. I have a chinese battery with attached protection circuit, need to drive motor from it.
    2. Problem is initially motor inrush current is high & short flag gets set(can read the flag by SMbus protocol)
    3. However when I connect light loads it works fine. Also if slowly I increase motor speed then it works fine.
    4. But in filed motor speed can be any. Can't change any battery paras.
    5. Any solution for ir?
     
  2. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,282
    1,234
    W
    We will need some more detail about the motor and battery, but you may be a to get around it with a large capacitor to supply the inrush current if it is not to high.
     
    #12 likes this.
  3. crutschow

    Expert

    Mar 14, 2008
    12,991
    3,227
    You can also add an electronic limiter to limit the motor startup current to an acceptable value, such as this.
    The limit is approximately 0.7V / R_sense.
    [​IMG]
     
  4. Vindhyachal Takniki

    Thread Starter Member

    Nov 3, 2014
    348
    6
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