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DRV10963: Drv10963 tuning

Joe Zhu
Intellectual 2540 points
Part Number: DRV10963

Hi Champion,

Some problems occurred when I use DRV10963 to drive my 5V-3phase BLCD motor. It turned out that no matter how I configured the parameters under the guidance of EVM’s user guide in DRV10963EVM GUI, my motor just failed to spin properly. The phenomenon is it starts to spin but quite unsmooth, then some jams occurred and finally the motor stops working. Both  DRV10963JA and DRV10963PD were used in my application but either of them performed well, it all began with a stuck-state spinning and ended up with failure. Is there any possible traps or negligence?

Besides, I’m wondering if a stand by daughter board of the DRV10963 EVM could drive a motor theoretically. As far as I’m concerned, for DRV10963JA or other J-series chips, as long as I input a PWM wave on it, it should have normally worked, however, nothing ever happens when I apply signal on it.

Can anyone offers me some solutions? Really appreciate it!

BR

Joe

  • 0
    TI__Mastermind 18900 points
    Hey Joe,

    Its a little tough understand what the problem might exactly be without more info. Would it be possible to take a picture of a phase current (U, V, or W) during this operation? FG voltage signal helps too.

    Generally, the Open to Closed Loop Threshold might be too small or way too large, or the Start Up Acceleration Rate may be too fast. Try experimenting with these parameters in the GUI.

    As for the JA vs. PD, TI recommends ordering DRV10963PDSNT samples along with the EVM.

    Thanks,
    -Cole
  • 0 in reply to Cole Macias
    Prodigy 90 points

    Hi Cole,

    I'm the exact person who met up with this weird problem and I asked Joe do me a favor to post this issue since he has corresponding authority to label it as urgent so you can just reply to me for later discussion.

    Anyway, the major problem is that neither the phase current nor the voltage of UVW are stable. In term of voltage, it started with a PWM wave with certain duty cycle and became zero for a bit while. As for the phase

    current, unfortunately I'm unavailable of current probe right now but I can send you some screen shots later. According to the display of DC power source, the current seemed to surge in moments and quickly reach the 

    protect value (which is about 500mA or 850mA), even though the operating current of my motor is about 200-350mA.

    Thanks for your feedback and I'll capture some screen shots as soon as possible.

    BS,

    Alan

  • 0 in reply to Alan Xie
    TI__Mastermind 18900 points
    Hey Alan,

    Thanks for reaching out. If you cannot grab the current waveform, I'd recommend grabbing at least FG and a phase voltage (U). VCC could help too. I'll ask more about the unstability and behavior once I see the waveforms.

    In addition, the motor datasheet (if you have one) and your target RPM could be helpful as well.

    Thank you,
    -Cole