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TMS320F28034: My motor doesn't spin in Level 2

Jack Tan80
Mastermind 7100 points
Part Number: TMS320F28034

Dear c2000 team,

I'm trying to spin PMSM motor based on the firmware HVPM_Enhanced_Sensorless_2803x. I have verified the Level 1, it is OK.

From the description in the docs, the motor should be spin in level 2, but my motor doesn't spin, it seems the motor is only vibrating. Below is my motor parameter, can you please share your comments here?

// Define the electrical motor parametes (Estun Servomotor)
#define RS 0.05 //2.35 // Stator resistance (ohm)
#define RR // Rotor resistance (ohm)
#define LS 0.0004//0.0065 // Stator inductance (H)
#define LR // Rotor inductance (H)
#define LM // Magnatizing inductance (H)
#define POLES 8 // Number of poles

// Define the base quantites
#define BASE_VOLTAGE 27.71 // Base peak phase voltage (volt), Vdc/sqrt(3)
#define BASE_CURRENT 27.5 // Base peak phase current (amp), Max. measurable peak curr.
#define BASE_TORQUE // Base torque (N.m)
#define BASE_FLUX // Base flux linkage (volt.sec/rad)
#define BASE_FREQ 240 // Base electrical frequency (Hz)

  • 0
    TI__Guru** 114200 points
    Hi Jack,

    Level 2 is used to verify ADC, park/clarke, calibrate the offset, the motor was running in open loop without motor parameters. So you need to set appropriate output speed and voltage (SpeedRef, VdTesting, VqTesting) for motor. And you have to check whether the inverter work well first before spin the motor.
  • 0 in reply to Yanming Luo
    Mastermind 7100 points

    Hi Yanming,

    Thanks for your reply.

    After changing the value of SpeedRef and VqTesting, my motor has rounded up. That means my inverter should work properly.

    But the waveform of one phase current is distort. Please see below waveform, do you have any comments on this? 

    Regards,

    Jack Tan

  • 0 in reply to Jack Tan80
    Mastermind 7100 points
    Hi Yanming,

    Any feedback from your side? Can you please share your comment about this distorted current waveform?

    Regards,
    Jack
  • 0 in reply to Jack Tan80
    TI__Guru** 114200 points

    Hi Jack,

    This means the power part of inverter is ok. The current waveform is not pure for the rotor angle is not correct and Vd/Vq is not the best value for motor. Level 2 is only for verify the inverter power module and driver, so it is ok, you can go ahead for next level.

  • 0 in reply to Yanming Luo
    TI__Guru** 114200 points
    Hi Jack,

    What's update on your side? Do you need any further assistance? If no, we would like closing this post.