TMS320F28377S: InstaSPIN vs. ESMO

Dhammika Wijesundera said:

1. Does InstaSPIN use ESMO or some other control method?

InstaSPIN doesn't use ESMO algorithm, it uses another flux observer method.

Dhammika Wijesundera said:

2. I understand InstaSPIN does some adaptive stuff. Does it compensate only for changes in the stator resistance?

No. The InstaSPIN doen't have any comensation for stator resistance and inductance by default. But you can enable Rs online calibration for compensating stator resistance changes.

Dhammika Wijesundera said:

3. InstaSPIN library is available in Q-Math. Can we get a floating point version that runs on F28377x?

You may download and install the latest MotorControlSDK, and the detailed introduction about the lab can be found in the lab user’s guide as the links below. And refer to the lab to implement the instaspin-foc for F28377x.

C2000WARE-MOTORCONTROL-SDK: https://www.ti.com/tool/C2000WARE-MOTORCONTROL-SDK

Universal Project and Lab User’s Guide: https://www.ti.com/lit/spruj26

Example lab project at the folder: C:\ti\c2000\C2000Ware_MotorControl_SDK_3_03_00_00\solutions\universal_motorcontrol_lab\f28002x

Dhammika Wijesundera said:

4. I can get very accurate rotor angle estimations using Hall sensor data and a Kalman filter. Do you think the InstaSPIN adaptive mechanism will be as robust as that? I assume you have done an accuracy check of the estimated angle as the parameter changes.

That depends on the hardware board, motor and your applications. It should be better than hall sensor when the motor is running at a higher speed.

Hi Yanming,

Thanks for the reply. I am still trying to understand the code. One immediate question - does the FAST observer work from zero speed?

Thanks,

Dhammika

Hi Yanming,

Thanks very much. This is very important info. One more thing. I assume the FAST is a full order Luenberger observer. Am I right? Any hint on the type of observer is greatly appreciated.

Thanks,

Dhammika