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TIDA-01606: Sensing inductor current in inverter using sigma delta modulator

Part Number: TIDA-01606

I am designing a three phase grid connected inverter by studying the TIDA-01606 reference design. 

In yor design, you use a hall effect current transducer to sense the inverter side inductor current. I find using a closed loop hall effect current sensor very expensive. 

1) Is it possible to use a one of your sigma delta modulators for sensing the inverter side inductor current in place of the hall effect current transducer?

2) Since the switching frequency is 50kHz, will the use of a sigma delta modulator provide satisfactory accuracy when sensing the inductor current at such a high switching frequency? 

  • Mabonga, hello and thank you for your interest in Texas Instruments.  I forwarded your query to our Industrial Systems team for review and disposition. You should hear from the design owner in the next business day.  I noticed that you sent the same question into us today, early morning Dallas time.  I have forwarded this to the design owner team as well.  As is such, I'm going to close this thread, which is now a duplicate question in the system.  Ram will respond on the other thread. 

    Best Regards,

    John Fullilove

    Reference Design Operations. 

    Texas Instruments