Synchronous rectification

Discussion in 'General Electronics Chat' started by Gaurav:), Dec 24, 2013.

  1. Gaurav:)

    Thread Starter New Member

    Dec 24, 2013
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    Hi.. I am working on a full wave bridged topology of SMPS. My power requirement is more than 3KW including 200 A of current. I am using IGBT H bridge at the primary of SMPS and MOSFET H bridge at the secondary. I am driving primary side IGBTs using microcontroller generated PWM. I need to drive MOSFETs using these PWM signals. Should I go for the isolation or pulse transformer?
     
  2. crutschow

    Expert

    Mar 14, 2008
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    I would think a pulse transformer is an isolation transformer. So what is your question?
     
  3. Gaurav:)

    Thread Starter New Member

    Dec 24, 2013
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    I mean, Should I go for the pulse transformer or use IR 2110?
     
  4. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    That depends on your topology and if you require isolation, would it not?

    If you require any more detail just ask and I shall consult my magic 8-ball.
     
    Gaurav:) likes this.
  5. Gaurav:)

    Thread Starter New Member

    Dec 24, 2013
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    Thank you for your response sir. I am using Full bridge, the standard isolated topology. Can I vary the output current by varying the duty cycle of the PWM signals at primary? Can output inductor decide the value of the maximum output current?
     
  6. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    Do you really want to try to build a 3kW SMPS with dual switched h-bridges and synchronous rectification, at your level of skill? :eek:
     
  7. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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    Good question.

    Seems some folks are always interested in building UPS's under the false assumption it's cheaper than buying one. I'm assuming this is a UPS and not a power supply.
     
    Last edited: Dec 27, 2013
  8. RamaD

    Active Member

    Dec 4, 2009
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    OnSemi has made a comparison of GDTs and their silicon solutions in an AN, and finally recommended their silicon solutions with a no. of reasons. The top one is :
    We dont make transformers :)
     
  9. Gaurav:)

    Thread Starter New Member

    Dec 24, 2013
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    If you guys can't help me out at you level of skills then whats the use of your so called 'SKILLS'??
     
  10. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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    Okey dokey. What are you building, what's it for? Post your schematic. Some form of 200A, 15V power supply?
     
  11. RobeeJ

    New Member

    Mar 19, 2013
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    I think it's for the Darwin Awards.
     
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