• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 82 subscribers
  • Views 345 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.

TMS320F28035: Request for initial help with DRV8301-HC-C2-KIT

Blake Carpenter
Expert 7055 points
Part Number: TMS320F28035
Other Parts Discussed in Thread: CONTROLSUITE, INSTASPIN-BLDC

Hi, 

I got the DRV8301-HC Kit working with the F28035 control card and the Instaspin GUI.

Had some questions to get us started with evaluation of our motor:

  • The motor is audibly somewhat noisier than expected.  Is there anything we should do in software to make it quieter, we think we have a 10 pole motor, but we notice that is not one of the drop down selections.  Would modifying this selection potentially make it quieter.  Should we be concerned about the pole mismatch.
  • How slow can we expect the motor to run sensorless?  Is there a way to transition to some voltage mode below this threshold to make it run slower- even if it is less controlled.
  • Is the ~80A the kit is rated for steady state, or RMS.
  • what is the best CCS project to use as a base for our software once we graduate from the GUI?
  • Is there an app note or some guidelines for optimiizing Kp and Ki?
  • With the 2803x control card, do we have the best instaspin version for low speed control?  Is there another chip that would give us markedly better low speed performance?
  • App notes for optimizing Kn and Ki

Thanks a bunch!

Blake

  • 0
    TI__Genius 17175 points
    What kind of noise are you hearing? VIbration? High pitch squeal? We would suggest you don't use a GUI project if you have motor parameters that cannot be programmed using the GUI. You should be able to find the same project with and without GUI in ControlSuite. For that kit, it is not intended to run continuously at 80A, that is more of a peak measurement.

    For documentation for InstaSPIN-BLDC, have you gone over the InstaSPIN-BLDC Sensorless Control PDF in C:\ti\controlSUITE\development_kits\DRV830x-HC-C2-KIT_v105\InstaSPIN_BLDC\~Doc?

    Low speed running is really dependent on your motor. Low inductance motors can be challenging, and not run as far low as higher inductance motors. This is a direct consequence of having enough back-EMF to calculate the flux angle (higher inductance leads to higher back-EMF for the same voltage). For low speed performance, the motor and hardware design are more important than the sensorless observer, as you'll want the cleanest back-EMF as possible, with the biggest amplitude.

    Sean