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Brushless DC Motor controller ICs

Discussion in 'Electronic Design' started by mark, Oct 21, 2008.

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  1. mark

    mark Guest

    Can anybody recommend any 6-step commutation BLDC motor controller
    ICs; I can't use a microcontroller or DSP as this is a safety critical
    application which precludes the use of software.

    I'm considering UCC2626 from TI, however, I really need something with
    synchronous rectification.
    I'm not that familar with motor control so any help would be much
    appreciated.
     
  2. Jamie

    Jamie Guest

    That kind of controller requires some sort of feed back on the
    angles.
    If you look at the docs, it talks about HALL returns. those are
    HALL pick ups that report back as to where the rotor is.. This
    in turns allows the controller to help maintain the position of the
    rotor to stay in sync.. I don't know if that is what you're referring
    to how ever, it maybe what you're looking for.

    http://webpages.charter.net/jamie_5"
     
  3. Jamie

    Jamie Guest

    Hall sensors are very cheap.
    Normally they are mounted in a group that slightly offsets the
    index notches.. this allows for the drive controllers to jokey the
    the rotor in place.
    Most of the time they are mounted internally, synchronized with
    the stator windings so there is no problem with alignment at
    installation time.
    They make 2 varieties of motors for this application.
    a normal induction motor and a motor with a PM in the rotor.
    the PM has much more torque at lower speeds while other does
    not but deals very good at higher RPM's..

    Today's technology now uses Vector Feed back system which is just a
    AC motor with tightly laminated bonded windings with a larger rotor in
    many cases and potted heat sinked cases for heat extraction.
    When operated in the "Vector Close Loop mode" via (Q encoder), these
    units can step down to very fine moments if so desired and lock them
    self's into position.

    It's a cheaper alternative to other expensive precision controlled
    motors.


    http://webpages.charter.net/jamie_5"
     
  4. Jamie

    Jamie Guest

    Ok, I'll keep that in mind when I'm driving my Hyundai! :))


    http://webpages.charter.net/jamie_5"
     
  5. Jamie

    Jamie Guest

    Well, if that is case it must be junk because I needed my blower
    motor replaced recently! :)


    http://webpages.charter.net/jamie_5"
     
  6. Toshiba TB6575 and others from this "family", sensorless...

    hth
    -
    Michael Wieser
    --
     
  7. BobG

    BobG Guest

    ===============================================
    New chips from Atmel announced 2 days ago
     
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