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LAUNCHXL-F28069M: Inline phase current measurement for FOC using shunt resistor

SHAMEER N
Intellectual 280 points

Part Number: LAUNCHXL-F28069M
Other Parts Discussed in Thread: MOTORWARE

hi,

we are using  launchxl-f28069m TI launchpad to control ac induction motor. we dont have an  inverter from TI,we decided to develop our own inverter board.

we are using  the inline phase current measurement instead of  low side current measurement .

i know that we have to change  the programming side if we are using the positive and negative feedback in current measurement.

we are following the labs examples of motorware.

My question is ,what are the things to be done in the programming side if we are using the inline (phase)current measurement ???....

  • 0
    TI__Guru** 117160 points
    Please change USER_ADC_FULL_SCALE_CURRENT_A, USER_ADC_FULL_SCALE_VOLTAGE_V and USER_VOLTAGE_FILTER_POLE_Hz in user.h based on your hardware. You need to know what sample delay of phase current sensor, and add the delay compensation by setting USER_VOLTAGE_FILTER_POLE_Hz.
  • 0 in reply to Yanming Luo
    Intellectual 280 points
    thank you for the quick reply.I have another doubt,
    we know that while using the low side current sensing the current is measured when the low side mosfet of inverter is turned on,if i am using inline phase current measurement the current measurement will be continuous,is there any difference in the programming side in both the cases??