zvs full bridge converter

Discussion in 'The Projects Forum' started by free2kamal, Apr 1, 2006.

  1. free2kamal

    Thread Starter New Member

    Apr 1, 2006
    Hai every one.......

    i want to build a 1kw float charger ..... i deside to use zvs variable frequency

    control full bridge converter to convert 230 V AC to 48 V DC.i reffered some

    application notes regarding the full bridge transformer design and the resonant

    tank circuit (i want to know how to choose the resonant frequency for the resonant

    tank circuit and the tank elements L & C) but still i am not sure about it........

    Please give me your valuable suggestions for the transformer and resonant tank

    element design, give me a design example i will be very much thankful to you,,.

    Please let me know,,,,,,,

    Thanks & Regards

  2. thingmaker3

    Retired Moderator

    May 16, 2005
    ISBN 0 8306 1665 9

    Power Supplies, Switching Regulators, Inverters & Converters
    by Irving M. Gottlieb

    Although SMPS seems overkill for a float charger. Why not rectify, filter, and regulate the o/p of a 36vac transformer?
  3. switcher

    New Member

    Apr 4, 2006
    Hi, I can give you the option of half bridge too, if you want it. I have an Internet group where I have uploaded some files explaining how I have designed and bench tested a version of a half-bridge ZVS circuit that can be done with not a whole lot of only common parts. It uses variable frequency and the LC tank on the secondary side. I have done the concept in LTspice.

    One nice thing about ZVS is that the EMI is much lower. I have observed high efficiency as well. I have no plans of ever going back to hard switching for off-line SMPS. I had to throw in my $.02 since I like it so much. :)