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How to do regenerative braking on DRV 8312 using PM sensorless project?

Karlquisha Sargeant
Intellectual 500 points

I am working on a project in which I have to do regenerative braking using the DRV 8312 kit and a PMSM BLDC motor.

I would like to know if anyone can assist/was successful in doing so. In terms of altering the code itself. Thank you.

  • 0
    TI__Expert 4760 points
    In most cases, you can regenerate by simply commanding a lower speed than the motor is running. In terms of the current in a field-oriented system, this causes the commanded value of the q-axis current to change polarity, which changes the polarity of the torque. So if the speed is one polarity and the torque is a different polarity, then you have energy coming back from the motor into the electric drive. Be careful what you do with this energy, as it can result in an over-voltage situation that can blow up your power supply or bus capacitor.
    Regards,Dave