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300W, 3Ph PFC

A.S.Bhushan
Expert 1060 points
Other Parts Discussed in Thread: TIDM-1000, UCC2818
Hi 
We have to design (AC-DC converter) 3 phase, 115Vac (Phase to neutral) to 24V, 10A DC output.
Every thing fine but we struggled  with THD and particularly 3rd, 5th and 7th harmonics at the input.
 
I request you to Please suggest us any reference circuit/ design/ IC to solve the above issue.
 
Regards,
A.S.Bhushan
VEPL
  • 0
    TI__Mastermind 34465 points

    Hello A.S.Bhushan,

    Can you please supply some more details of your requirements?

    Why are you running such a small load from a 3 phase supply when you have a line to neutral voltage available of 115V ?
    What is the application and your line distortion requirements ?

    Regards

    John

  • 0 in reply to John Griffin1
    Expert 1060 points

    Thanks for your reply Mr.John.

    It is the submarine application. Available supply is 100-180Vac , 3 phase, 4 wire only.
    The module will be subjected to CE101 and CE102 tests of MIL-STD-461E.

    Regards,
    A.S.bhushan
    VEPL.

  • 0 in reply to A.S.Bhushan
    TI__Mastermind 34465 points
    Hi A.S.bhushan,
    From previous queries I know that we do not have an analogue solution to your 3 phase requirements.
    However there is a C2000 based solution that may be of interest.
    www.ti.com/.../TIDM-1000
    You should contact the forum that handles queries on this part for further details

    Regards
    John
  • 0 in reply to John Griffin1
    Expert 1060 points
    Thanks Mr. John,
    I have seen "www.ti.com/.../TIDM-1000" in TI website. This is 2.4KW PFC.
    But we need only 300W PFC. Any calculator or worksheet to simulate this for 300W?

    Regards,
    A.S.Bhushan
    VEPL.
  • 0 in reply to A.S.Bhushan
    TI__Mastermind 31580 points

    Hi

    The TI analogue PFC controller portfolio does not support three phase applications.

    Normally three phase application are higher power level and customers are happy to use more sophisticated controllers like C2000.

    An alternative approach for lower power three phase could be to use a three phase rectifier and use a single phase PFC controller like UCC2818 to boost the voltage to a constant DC voltage.

    Have you seen this article,

    Regards

    Peter

  • 0 in reply to Peter Meaney
    Expert 1060 points
    Thanks Mr. John and peter. For this low power applications, I tried three individual PFCs in three phases. It works. Fine. Thank you.
    But , due Space constraint in my module, I am not able to use this.

    Finally, I used Valleyfil rectifier circuit. This helped me in reduction of harmonics upto 80%.

    Regards,
    A.S.Bhushan