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Current sense issue in BLDC motor

Discussion in 'Microcontrollers' started by RenesasT, Aug 9, 2017.

  1. RenesasT

    RenesasT Member

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    Hello All,

    I am developing BLDC motor driver of 24V ,20A current.

    The first situation is,
    Suppose, motor is at full load and POT (Throttle) is at maximum and then motor is trying to start and somebody picks rotor by hand then motor is stopping. It should reach 20 A and then it should stop as 20A set as current protection range. But it is stopping at 1 A or 2 A of current.

    The second situation is if motor is at full load i.e. at 19A (as 20A is shut down of motor). Then I stopped the supply. Then I again starts the supply, at that instance the motor is running and reaching to 19A.

    The third situation is, if motor is running at 19A i.e full load and I stopped the supply and increased some more load using dynamo meter (lets say 25A) and then I started the supply at that time also it is running and once reach 20A it stopps.

    The fourth situation is, if motor is running at 19A i.e full load and I stopped the supply and increased some more load using dynamo meter (lets say 30A) and then I started the supply at that time motor is stopping at 7-10A. But actually motor should stop at 20A.

    The second and third situation is good. But at first and fourth situation, motor actually should run. Once it would reach 20A it should stop.

    What could be the case?
     
  2. Ian Rogers

    Ian Rogers Super Moderator Most Helpful Member

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    Another thread???? There is no need to start another thread.... If you didn't get the answers there, the same guy's will reply here!!!
     
    • Agree Agree x 2
  3. RenesasT

    RenesasT Member

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    Hello That thread is different and this one is different.

    i have to resolve it. Please reply.
     
  4. dave

    Dave New Member

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  5. RenesasT

    RenesasT Member

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    Please guys reply. I have trust on all of you.
     
  6. alec_t

    alec_t Well-Known Member Most Helpful Member

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    You've had replies on the other site.
     
  7. RenesasT

    RenesasT Member

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    Oh Alec_t ... Nice to see here you. Electro-tech and all about circuits is same website?

    Thanks for inform me.

    You asked me the values. I had given over there. Please suggest me the same.
     
  8. alec_t

    alec_t Well-Known Member Most Helpful Member

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    No.
     

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