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PMSM FOC Build level 2 is not working

Rohith Bhandaru
Prodigy 90 points
Other Parts Discussed in Thread: DRV8332, CONTROLSUITE

Hi,

I'm working on f28035 + drv8332 motor control kit.

I have followed build level 1 of sensored foc of pmsm successfully. However, in build level 2, Motor is not rotating, its moving back and forth once i increase the speed, and once i decrease, its rotating. 

I'm not getting sinusoid current profiles when i run this build level. 

Request for help ASAP

  • 0
    TI__Guru** 118800 points
    Which kit are you referring to?

    there are no controlSUITE sensored FOC projects for the DRV83x kits. Are you using the project for the HVKIT?

    Post the exact path of the project you are using.
  • 0 in reply to ChrisClearman
    Prodigy 90 points

    Hi,

    Yes, there is no project for drv 83x kit. I'm using a modified version of 

    C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.0\HVPM_Sensored. I've modified it for the drv 8332 motor controller.

  • 0 in reply to Rohith Bhandaru
    TI__Guru** 118800 points
    I would suggest reviewing the modifications, especially in the pin-mapping, ADC channels, and scaling variables.
  • 0 in reply to ChrisClearman
    TI__Mastermind 27240 points

    As you increase the speed reference, you should increase the voltage reference also. Try increasing VqTesting.

    rgds,

    ramesh

  • 0 in reply to Ramesh Ramamoorthy
    Prodigy 90 points

    Hi,

    I've tried to implement your suggestion. But I couldn't see any result. The problem is motor is not running smoothly.

    PFA my pwm code. f2803xpwm.h

  • 0 in reply to Rohith Bhandaru
    TI__Mastermind 27240 points

    Make sure that in build level 1, you see sinusoidal voltage output from the inverter across line to line. You can put an RC filter at the inverter outputs to GND, and then probe any two outputs of inverter using a scope and use its MATH feature to find the difference between these two signals. if you get a sinusoid, then the PWM logic is ok.

    The problem you mention seem to be a symptom of inappropriate Voltage and Frequency. If you see the motor spinning at low speed commands, it means that the voltage setting seem to tally with the speed setting.

    Probably, if you spend some more time digging through the issue, you may find the answer.