BLDC - trapezoidal control

Discussion in 'Automotive Electronics' started by Krzysztof Bieda, Jan 13, 2016.

  1. Krzysztof Bieda

    Thread Starter Member

    Jan 5, 2016
    32
    0
    Hello everyone,

    I am curious if there is any other trapezoidal way of control for BLDC that uses all three Mosfet half-bridges
    all time.

    I have implemented and tested:
    trap.PNG
    Here at every time moment only two branches works.

    But maybe when I will have all branches working then it will be more smooth control.

    I have implemented FOC control too, but this thread is about trapezoidal.

    Best regards,
    Krzysztof
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,548
    2,373
    Normally BLDC is powering any two of the three stator windings at any given time, the motor can also be used a an AC sinusoidal type motor, using all three windings in 3ph mode.
    Microchip has some app notes on them.
    Max.
     
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