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DRV8301-69M-Kit Current specification: peak, continuous, rms, per phase? regen?

Stephen Purcell
Prodigy 10 points

Other Parts Discussed in Thread: CONTROLSUITE, DRV8301, MOTORWARE

I read 40A continuous, elsewhere 60A.

Do these numbers refer to one or three phase wires? are they peak or RMS?

What are the corresponding braking (regen) current limits?

I have the board, have worked through some programming tutorials and have looked for answers in the documentation, but remain confused.

Thank you.

Steve Purcell

P.S. How can braking/regen be controlled by the GUI interface, or is software programming required? Speed or torque control?

  • 0
    TI__Guru** 119680 points

    Stephen,

    For the InstaSPIN solutions we use the external current sense circuits, and these are scaled to +/- 41.25A peak.  We released some previous projects in controlSUITE with the same DRV8301 board that use two shunt current techniques and use the on-chip DRV8301 PGAs. These are scaled to over +/- 60A peak (don't recal exactly).

    Braking/Regen: it depends on exactly what you want to do.  In basic cases you are controlling the current and can decelerate under control.  If you want to do actual braking by turning on high or low side inverters, that needs to be added on your own in a MotorWare project.  You will need some logic about when you enable.  I suggest keeping FAST running during a brake, it will continue to track and can be useful if you need to take control again.

    You can even go a little more sophisticated where you do a controlled deceleration, while dumping current into -Id (keeping Is < max current).