whats the difference between single and 3 phase bldc controllers

Discussion in 'General Electronics Chat' started by daveyjones97, Oct 29, 2011.

  1. daveyjones97

    Thread Starter Active Member

    Oct 21, 2011
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    hi, thanks for looking. im a newbie with an interest in electric vehicles and understand the basics of how bldc works but im curious whats the difference between single and 3 phase bldc controllers? do the 3 phase versions have 3 lots of components and if so which ones, is it just an extra 2 power fets or are the 3 phase ones different from the microprocessor onwards? any help will be greatly appreciated as im a lone hobbyist with no access to any proffesional help and the net has failed me on this. thanks
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    All BLDC motors are three phase. There is no single phase BLDC motor that I'm aware of. A BLDC motor control does not need a microprocessor. There are a bunch of different controller ICs out there to drive the motor,the logic to do it is built into them. A BLDC driver/controller needs six mosfets or IGBTs to create the commutation of the motor.
     
  3. praondevou

    AAC Fanatic!

    Jul 9, 2011
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  4. daveyjones97

    Thread Starter Active Member

    Oct 21, 2011
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    by single phase what i meant was pwm speed controllers for brushed motors.
    can anyone reccomend a book or website about how motor controllers are designed and work? i have so many holes in my knowledge it looks like a piece of cheese and im keen to start tinkering. when my understanding allows i want to build an electric bike, but id prefer 750w to 1000w which is why i havent just paid through the nose for one.
    bloody ameteurs!
    thanks
     
  5. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    Last edited: Oct 30, 2011
    daveyjones97 likes this.
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