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DRV8300DIPW-EVM: DRV8300DIPW-EVM

nimesh shewale
Prodigy 120 points
Part Number: DRV8300DIPW-EVM

I tried to run the motor with PWM (six step trapezoidal method) the motor is taking full current & it's not working properly.

This logic i've followed

do i have to give same pwm on low side as high side , because low side inputs are inverted.

HALL(A,B,C) INHA INLA INHB INLB INHC INLC
4 0 1 PWM !PWM 0 0
6 PWM !PWM 0 1 0 0
2 PWM !PWM 0 0 0 1
3 0 1 0 0 PWM !PWM
1 0 0 0 1 PWM !PWM
5 0 0 PWM !PWM 0 1
  • 0
    TI__Mastermind 23556 points

    Hey Nimesh,

    Thank you for your question. I have assigned a team member to support your thread.

    Best,

    Akshay

  • 0
    TI__Mastermind 26746 points

    Hi Nimesh,

    Thanks for posting your question! If you could refer to the below logic table for trapezoidal control and let me know if that fixes your issue that would be great. Also you want to double check to ensure that the hall and phase wires are corresponding to each other. The order of connecting the phase wires and the hall wires are important for proper motor operation.

    If the low side inputs are inverted then you can give them the same pwm as the high side. 

    Regards,

    Anthony Lodi

  • 0 in reply to Anthony Lodi
    Prodigy 120 points

    Hi Anthony,

    I tried to run motor with above logic the motor is not running also i've checked gate output signals I'm getting expecting output but motor is not working it is taking full current this phenomenon happening with only pwm (30khz) case but if i give the inputs gate  signals with 100% duty cycle (1/0) the motor is running perfectly.

  • 0 in reply to nimesh shewale
    TI__Mastermind 26746 points

    Hi Nimesh, 

    When you mention that it is taking full current could you go into more detail about what you mean by that? Is full current meaning you are hitting the overcurrent limit? Could you provide a waveform showing the GHx, GLx, INHx and INLx signals during operation? I want to see what is happening. Also, if you could show the same thing with 100% duty cycle that would be great. If you could provide one waveform zoomed in and one zoomed out (to see several commutation cycles) that would be helpful.

    Regards,

    Anthony Lodi