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UCC28070: UCC28070 multiple current sharing in three phase power application

Paul Simon
Prodigy 70 points
Part Number: UCC28070
Other Parts Discussed in Thread: UCC29002,

Tool/software:

I am using this in a three phase power system, I am looking for current sharing techniques.

  • 0
    TI__Genius 9690 points

    Hi Paul,

    Do you have a block diagram and schematic of your system so I can better support your question? The UCC29002 is our go-to load share controller. We have many resources available to help with your design.

    Regards,

    Jonathan Wong

  • 0 in reply to Jonathan Wong
    Prodigy 70 points

    I have a 3 phase 400Hz, powering 3kw, I am synchronizing and using six current sense transformers. I am implementing a passive current sharing with a droop current share control. I have a 400V bus powered by the three PFCs. I see your datasheet have some on parallel but don't discuss current sharing.

  • 0 in reply to Paul Simon
    TI__Genius 9690 points

    Hi Paul,

    What do you mean by "passive current sharing"? Is this where the UCC29002 comes in?

    I am not sure what you mean by "have some on parallel but don't discuss current sharing". By placing the 3 modules in parallel with each module having a UCC29002 load share controller, you will have an equal load among all three phases.

    The UCC28070 will not mention load sharing since that is a PFC controller. Below are some diagrams that may help with your understanding. The load share controller design will be independent from the power topology design.

    5531.UCC29002 Sharing Blocks2.pdf

    Regards,

    Jonathan Wong