Tool/software: Code Composer Studio
I am trying to do an autotune with a small 1HP AC motor that I successfully tuned with the original HVMTR development kit. I am now using our own hardware with the 28069 and trying to do an autotune of the same motor. The original values that resulted from the autotune were as follows:
Rr .903 Ohm
Rs 2.335 Ohm
Ld 35.500 mH
Lq 35.500 mH
IdRated 1.3 A
Flux V/Hz 3.129
Rated Current 3.2 A
Rated Voltage 230 V
RoverL 65.7
Base Freq 60 Hz
Voltage Scale 625 V
Current Scale 20 A
Max Current 5.0 A
iq Full Scale Current 5.0 A
iq Full Scale Voltage 468.75 V
BusV 322.0 V
With the new hardware, the autotune more often than not will fail at the conclusion of the RatedFlux tuning with a fluxError.
Prior to the error, the motor reacts predictably.
RoverL usually around 83 (which is a little high)
Rs state appears normal
RampUp, motor ramps up as expected
IdRated, 1.0A
RatedFlux, 3.2/3.3 values are shown during the RatedFlux tuning which is reasonable
When the fluxError occurs, the value is suddenly .118; during the IdRated and RatedFlux steps, the motor spins as expected.
The voltage filter pole Hz is 198.3
Thank you in advance for any suggestions or help!
Sandy
