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  1. Replies
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    Sticky: Change the file to PDF go to advanced on the...

    Change the file to PDF go to advanced on the website and upload the file. I cannot open it with my 7zip file opener

    Silvio
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    Sticky: I cannot see your schematic something is wrong...

    I cannot see your schematic something is wrong with the link.
  3. I am just wondering what kind of batteries are...

    I am just wondering what kind of batteries are you planning to charge, 30v and 40A that is 1200w. Do you really need this power? There are a lot of ready made converters on aliexpress I guess they...
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    Sticky: Hi Stewin, Well as far as the smps is concerned...

    Hi Stewin, Well as far as the smps is concerned this must have a good working short circuit protection. It must sense both high and low side pulses. The one from Ludo is a good example of this. The...
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    Sticky: Hi Stewin, well using EE transformers brings the...

    Hi Stewin, well using EE transformers brings the need to use ecw. Isolation is not so good at 320v, I am saying this is that usually when mosfets blow they tend to short out the gate with the source...
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    Sticky: I think you will be better off using 2 X ir2110...

    I think you will be better off using 2 X ir2110 instead of gate drive. A gate drive transformer is a delicate thing to do and it has to be symmetrical in all ways with the 5 windings. It also needs...
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    Sticky: With 4 capacitors of 1000uF /200v you will have a...

    With 4 capacitors of 1000uF /200v you will have a value of 1000uF across the 320v line with 2 capacitors 680uf/400v you will have a value of 1360uF across the 320v line. 680uf will have more...
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    I see the schematic now, well there is no true...

    I see the schematic now, well there is no true feedback and the output is not sensed for voltage. You only have a means of changing the pulse width with a preset. As the load changes so does the...
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    The output voltage will change with a narrow...

    The output voltage will change with a narrow pulse width if it is loaded enough. It seems that the output is still holding the peak voltage by the output capacitor. Remember that every time the...
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    Do you have a load on the output? Without it the...

    Do you have a load on the output? Without it the output voltage never changes.
  11. Kindly send me this E-book. My mail address is...

    Kindly send me this E-book. My mail address is silviodeleo@gmail.com

    Thanks and regards Silvio
  12. Replies
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    Sticky: Hi Das i think your problem is that until you are...

    Hi Das i think your problem is that until you are testing you should ground pin 10 of sg3525 and not leave it open. This is very sensitive and any interference may cause it to partly trigger your...
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    Sticky: Hi Das As I can see from the photos you sent...

    Hi Das As I can see from the photos you sent that the waveform is getting on top of each other. Once you get this distortion it will not oscillate properly and the transistors will try to switch on...
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    Sticky: Hi Das, I think you may be doing something wrong....

    Hi Das, I think you may be doing something wrong. Post a picture of your PCB From top and also from bottom. I need to see what you done. Post also a picture of the waveform without main power.
    ...
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    Sticky: That is not a proper wave form it must show a...

    That is not a proper wave form it must show a square wave. Power up only auxiliary supply and check wave form. If it is not square then either sg3525 or IR2110 is not good. Try changing SG3525...
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    I can see you make a nice job there. I would...

    I can see you make a nice job there. I would rather see some oscilloscope shots showing how the pulse width is changing.
    The voltage is controlled by changing the pulse width. However the...
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    Hi Res, The circuit looks promising at a first...

    Hi Res, The circuit looks promising at a first glance, from what I have read so far these tend to be a bit sensitive and usually they are used for a constant load. I do not know what are your...
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    Sticky: Can you post a picture of your pcb. I would like...

    Can you post a picture of your pcb. I would like to see it. See that it is large enough so that I can follow the traces.
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    If you are opting for regulation keep in mind...

    If you are opting for regulation keep in mind that this is done in the primary winding. If you have more than one secondary than all the secondary voltages vary together. Having such a high output...
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    Have you tried winding the 64 turn in bifilar...

    Have you tried winding the 64 turn in bifilar fashion? Are you using a layer of tape between each winding. Are you leaving 4mm margin space at the bobbin cheeks? I think your winding is arching and...
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    Well that is your problem my 550w smps with 700w...

    Well that is your problem my 550w smps with 700w peak is not meant to work for a 1000w. The whole set up has to be different. My smps was tailor made and I spent many hours trying to perfect it to...
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    Be careful when using electronic load as no...

    Be careful when using electronic load as no matter how much the voltage drops the load stays the same.

    If you want to build a 1000w smps then there is mine and also ludo's. This power supply has...
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    Hi I do not think you can use both. It will be...

    Hi I do not think you can use both. It will be either short circuit protection and the power supply will stop. You have to switch off and wait for the bulk capacitor to discharge then switch on...
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    It depends on which power supply are you...

    It depends on which power supply are you referring to; Is it the 700w smps or the 1000w? The 700w smps has a current limiter and not a short circuit protection. The 1000w smps uses a current...
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    Very well Sam if you have already a bit of...

    Very well Sam if you have already a bit of experience then this will help you a lot. Ludo's design is more strait forward and please look for the latest version on his tread. That power supply has...
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