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DRV5011: BLDC motor hall sensor.

Samir Nagiyev
Prodigy 25 points
Part Number: DRV5011
Other Parts Discussed in Thread: DRV5015

because of space restriction in my bldc motor design i have to put hall sensor upside down stator slots. Thus magnetic flux direction will reversed. is that gonna work for my application?

  • 0
    TI__Mastermind 27715 points
    Hi Samir,

    Welcome to the E2E Community! Our engineers will reply to your question tomorrow when we return to the office.

    Best regards,

    Ian Williams
    Applications Manager
    Current & Magnetic Sensing
  • 0
    TI__Mastermind 26115 points
    Hello Samir,

    The sensor will still function properly in this situation as long as no ferromagnetic material gets in between the sensor and the magnet. Because the flux direction is reversed, the square wave produced by the sensor as the magnet rotates will be inverted, but will still be a square wave.
  • 0 in reply to Mitch M
    Prodigy 25 points
    Hello Mitch,

    Thank for kind reply.
    i have used hall sensor S5725_E of ABlic company. My BLDC is 24s 28p and i put them in 60mdeg mechanical (every 4 slot space) to get 120edeg. when i use hall sensor-less controller motor works smoothly and very powerful. But, as I connect them to same controller but hall sensor motor controller version it vibrates. different hall sensor configurations it starts moving but in slow speed its ok but higher the rpm more radical it torque ripples shakes very bad. i guess sensor is not right chose and i guess your DRV5011 will solve the issue. please check s5725 form ablic.
  • 0 in reply to Samir Nagiyev
    TI__Mastermind 26115 points
    Hello Samir,

    It is hard to say, based on which version of the S5725_E you are using. If the DRV5011 is not sensitive enough for you, then you could look into using the DRV5015. Also, if the inverted square wave end up being a problem with the device mounted on the back then you may want to use the DRV5015A3, which has an inverted sensitivity.