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TMS320F28069: Vector Control solution for stepping motor

Sh.Sasaki
Guru 13625 points

Part Number: TMS320F28069
Other Parts Discussed in Thread: DRV8880, CONTROLSUITE, DESIGNDRIVE

Hi all,

My customers are considering turning stepping motors with high efficiency.

Is there a C2000 solution for rotating the stepping motor with vector control as shown below?

Or similar to it.

https://www.renesas.com/en-us/promotions/solutions/event/devcon2017/sf-06b.html

Currently customers are using open loop control with C2000 and DRV8880,

but they are troubled because of the large current value at low speed in this method.

Best regards,

Sasaki

  • 0
    TI__Guru** 116790 points
    You can find a stepper motor control example as below directory in C2000 controlSUITE if you downloaded and installed it. The example implement microstepping and current close loop control for a bi-polar stepper motor with dual full bridge inverter. This can help to solve the large current on low speed and high vibration on high speed. Your customer can refer to this example to improve performance.
    \ti\controlSUITE\development_kits\DRV8412-C2-KIT_v131\Stepper
  • 0 in reply to Yanming Luo
    Guru 13625 points
    Hi Yanming-san,

    Thank you for your support!
    I think that it can be realized by monitoring BEMF based on this program and controlling Iref.
    I will think about it.

    Best regards,
    Sasaki
  • 0 in reply to Yanming Luo
    Guru 13625 points
    By the way, is there an example program that monitors BEMF and controls Iref?
  • 0 in reply to Sh.Sasaki
    TI__Guru** 119680 points
    Sasaki,
    We have used InstaSPIN-FOC on 3-ph steppers, but it can't be used on standard 2/4/8-phase. This is controlling the stepper in velocity mode, not position/step mode, and there is not pure control at zero speed of course. So a different use case than most stepper motors.

    Other than that we have only done standard step / microstepping and to be honest a C2000 class device is not really required to do standard stepper control. We usually recommend customers look at our DRV87x integrated stepper drivers.
  • 0 in reply to ChrisClearman
    Guru 13625 points
    Hi Chris-san,

    Thank you for your information.

    By the way, are you planning to release 2-ph stepper demo software using InstaSPIN-FOC or MOTION?
    My customer wants to drive the motor with the following specifications.
    - Using F28069M
    - Field oriented control
    - 2-ph stepper
    - Speed control and position control with incremental encoder

    If SW is not released, are there any advice for realizing that?

    Best regards,
    Sasaki
  • 0 in reply to Sh.Sasaki
    TI__Guru** 119680 points

    Sasaki,

    We are not planning to release ANY Stepper control related example projects. InstaSPIN, DesignDRIVE, or any other. Steppers just aren't a focus for us.

  • 0 in reply to ChrisClearman
    Guru 13625 points

    Hi Chris-san,

    Thank you for your reply.

    I got it.

    Best regards,

    sasaki