TMS320F28034: My motor can't spin in LEVLE 3 based on HVPM project

What rated current and speed is your motor? You may change the SpeedRef and IqRef based on the motor specification, to spin the motor smoothly.
Could you please check the offsetA/offsetB/offsetC in expression? Why the phase current of motor is always positive on your scope waveform?

Hi Yanming,

The peak current is about 1A, and rated speed is 100HZ.

The value of offsetA is 0x007E948D, and offsetB is 0x007E3904, I have converted it into 12BITS adc value, they are 2025 and 2019 respectively. I think those 2 values should be OK.

I don't know why the current is always positive, I have tried with different SpeedRef and IqRef values, it still failed and the current are always positive. Sometimes it triggers OCP that makes the TZ signal pull low, and sometime the motor is vibrating. I still can't get what I expected.
How to set the appropriate SpeedRef and IqRef? Is there any guideline?

When I goes back to LEVEL2, the motor could spins in very slow speed, and I can see the negative current.

Hi Yanming,

May I have your comments here?

Thanks...

Were you using the TI HV kit or your own board? What's pi_id.Ref set? You'd better to set the pi_id.Ref to ZERO if you are running a PMSM. And you may run a ACIM with set pi_id.Ref to a positive value.

Hi Yanming,

I'm running the code on my board, and PMSM are used.

Yes, pi_id.Ref set to 0.

Hey Yanming,

When I goes back to LEVEL1, the graph on CCS shows as below, I think this should be OK. Right?

Here is the offset value of current sense amplifier.