Sensorless FOC for ACIM

shuen jan hsu

Hi,

I'm trying to implement FOC sensorless to ACIM with high voltage motor control kit (f28035).

At level 3 test, no matter what Kp and Ki tuned, the output of pi_id and pi_iq didn't track the Ref signal.

Are there something that i miss?

Thanks

0 Ramesh Ramamoorthy over 9 years ago

1. Looks like the PI controllers have saturated, and hence staying put there.

2. Just to verify PI controller, loop the .Out value back in .Fbk and you will see that the PI controller works.

3. Restore it back, and verify if you feed enough DC bus voltage in the system.

0 shuen jan hsu over 9 years ago in reply to Ramesh Ramamoorthy

Thanks for the reply

If i set the id_ref=0.08, iq_ref= 0.05, then my pi controller can track the reference signal.

But the motor won't spin in this situation.

If i set the id_ref=0.1, iq_ref=0.05, then my pi controller will go saturate and never track the ref signal.

However, the motor will start to spin to the reference speed at this time.

0 Ramesh Ramamoorthy over 9 years ago in reply to shuen jan hsu

I don't know what else to say. Did the LEVEL 2 work ok?

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