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    yoosefheidar

    Problem with half bridge

    it seems at first step i should replace secondary winding with copper sheet to see what happend.hope that solves snubber problem!
    in case of increase

    yoosefheidar 12-05-2019, 09:51 PM Go to last post
    Silvio

    Problem with half bridge

    I think you are referring for the snubber across the primary winding. This is there to suppress any spikes generated during switch off of every cycle.

    Silvio 12-05-2019, 09:39 PM Go to last post
    yoosefheidar

    Problem with half bridge

    thank you again
    i going to use copper sheet instead of round wire for test
    i think about another way:increase freqquency to 100 KHz and reduce

    yoosefheidar 12-05-2019, 03:52 PM Go to last post
    Marshall

    SMPS with PFC

    About this project , i checked separately every stage , NCP1653 in Data Sheet has same conections as on this schematic only inductor everywhere is 600uH,

    Marshall 12-05-2019, 11:18 AM Go to last post
    Silvio

    Problem with half bridge

    At the current of 20A these effects will surely come out and that is the reason of the extreme heat. I suggest you wrap 4 wires at a time and make 6 bundles.

    Silvio 12-05-2019, 09:28 AM Go to last post
    yoosefheidar

    Problem with half bridge

    thank you very much Silvio
    wire is made of one bundle of 22 strands.but they are not parallel and they wrapped together so for example in one strand

    yoosefheidar 12-04-2019, 10:24 PM Go to last post
    Silvio

    SMPS with PFC

    I guess you want to check the schematic for any errors correct? If that is so please post a larger image of the schematic as it is too small to see it

    Silvio 12-04-2019, 09:56 PM Go to last post
    Silvio

    Problem with half bridge

    The wire for secondary with 22 wires 0.55mm can surely carry the 20 amps needed. I am assuming that the winding get hot during a load of 20 amps. I

    Silvio 12-04-2019, 09:49 PM Go to last post
    Marshall

    SMPS with PFC

    Hello, i think everything is ok about power supply , there is no errors, you can see on this one ..

    Marshall 12-04-2019, 01:13 AM Go to last post
    yoosefheidar

    Problem with half bridge

    HI
    I use this schematic for a 700 watt power supply.output voltage is 36v and current is 20amps.the core is etd44/freq is 50KHZ/primary is 30 turns

    yoosefheidar 12-03-2019, 06:17 PM Go to last post

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    Rookiex

    SMPS with PFC

    Thread Starter: Rookiex

    https://www.youtube.com/watch?v=WKIbWAQ3-NI&feature=player_embedded&fbclid=IwAR143j5fEtZ0lVbPvy1cxARg0yrtNDngCbAxts0yCRyCO8ZPHE1bKTfSbrY Thanks...

    Last Post By: Marshall 12-05-2019, 11:18 AM Go to last post
    yoosefheidar

    Problem with half bridge

    Thread Starter: yoosefheidar

    HI I use this schematic for a 700 watt power supply.output voltage is 36v and current is 20amps.the core is etd44/freq is 50KHZ/primary is 30 turns...

    Last Post By: yoosefheidar 12-05-2019, 09:51 PM Go to last post