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CCS/TIDA-00778: one shunt DC bus current sensing for TIDA-00778

aihua Liu
Prodigy 20 points
Part Number: TIDA-00778
Other Parts Discussed in Thread: MOTORWARE

Tool/software: Code Composer Studio

Hi,

Recently I found a TI DESIGNS called TIDA-00778 is very useful for my design, especially the single-bus current sampling method used to reconstruct the phase current. The software code mentioned in the design document can be obtained from MOTORWARE, but I found that in the header file user.h, USER_NUM_CURRENT_SENSORS can only select 2 or 3, and cannot select 1. Does this mean that only two or three current sensor solutions can be used at present, and one current sensor solution cannot be used? Where can I find the software code for one shunt current sensor? Thank you!

  • 0
    TI__Intellectual 1520 points
    Hi Aihua,

    Thanks for your interest in TIDA-00778. The reference design shows the current sensing aspects of single shunt FOC current sensing hardware circuit. The design shows how to select the opamps, what is the settling time, sampling points etc.
    The MOTORWARE has provision for only 2-shunt and 3-shunt and as you said it does not have the single shunt algorithm option. Now with 1- or 2- or 3- shunt algorithm, the DC bus current waveform will be similar in each case with SVPWM, as shown in TIDA-00778.
    Sorry to say that there is no single shunt code available for now in MOTORWARE.

    Thanks,
    Manu
  • 0 in reply to Manu Balakrishnan
    Prodigy 20 points
    Thank you for your quick reply. Conveniently, please let me know when there is 1-shunt code！
  • 0 in reply to aihua Liu
    TI__Intellectual 1520 points
    I will do my best to inform you when we have the code in ti.com. I would recommend you to keep check time to time, for the availability of more collaterals or code on single shunt. Thanks for your interest in TI reference designs!!

    Thanks,
    Manu