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TMS320F28069F: InstaSPIN-FOC : USER_NUM_CURRENT_SENSORS

Geon Kim
Expert 1070 points

Part Number: TMS320F28069F
Other Parts Discussed in Thread: MOTORWARE,

Hello,

I have a question on the InstaSPIN-FOC.

Specifically it is on the user parameter of USER_NUM_CURRENT_SENSORS to be set in the file of user.h of the motorware software package.

Our prototype product uses the TMS320F28069F device for sensorless vector control of the induction motor and it employs two-shunt current measurement.

It is stated in the InstaSPIN-FOC user's guide that USER_NUM_CURRENT_SENSORS should be defined as follows for our prototype product.

#define USER_NUM_CURRENT_SENSORS (2)

Now I am wondering if this is all to employ two-shunt current measurement.

For instance, two-shunt current measurement can be for A and B phases or B and C phases or C and A phases.

However it seems that the InstaSPIN-FOC user's guide does not state on the measured specific phases when two-shunt current measurement is to be employed.

Thank you for your guidance.

With regards,

G. Kim

  • 0
    TI__Guru** 117160 points
    The instaSPIN-FOC will use phase A and B currents by default if the number of current sensors is 2. You might change the code in HAL_readAdcData() in hal.h by using Ia=-(Ib+Ic) instead of reading the Ia from the ADC result if you are using Ib and Ic.