• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 83 subscribers
  • Views 1364 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8301-69M-KIT: Torque Control and Regenerative Braking

Rushi Jariwala
Expert 1225 points

Part Number: DRV8301-69M-KIT

Hi,

I plan to run my motor on torque control. But I am wondering how would regenerative braking happen. 

This is my understanding:

1. In speed control, when motor is running at a high speed and I leave the throttle, the speed ref is set to 0. The output of speed PI controller sets a negative reference for Iq current. And that is how the energy will go back to the battery.

2. In current control (torque control), if I leave the throttle, Iq_ref will be 0 and there will be no regenerative braking. 

Is my understanding correct? 

If so, how should I map the throttle value to the Iq_ref to enable regenerative braking?  

  • 0
    TI__Guru** 116860 points

    1. Right. The bus voltage will be boosted and energy will go back to the battery if the motor type is PMSM and apply an opposite torque current.
    2. Not always. The bus voltage will be boosted also if the motor was running in the field-weakening operation region.

    Typically you need to control the boosted voltage and current to the battery that depends on the reference torque current, you might need to add a control loop to implement it, not just simple linearity of throttle value.