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Type: Posts; User: mituadas

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    Sticky: Please help me for preparing transformer

    Please help me for preparing transformer
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    Sticky: I had made a SMPS 1000w which was already posted...

    I had made a SMPS 1000w which was already posted in this thread. Now i am facing a problem when connect to Audio Amplifier . Some Humming noise is coming. Same Amplifier i have tested with...
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    Sticky: Thanks Silvio for your advise. It works for me....

    Thanks Silvio for your advise. It works for me. My Feedback connection was before the Inductor. I rectified it and now it is working.
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    Sticky: I just disconnected the feed back. Now my SMPS...

    I just disconnected the feed back. Now my SMPS output voltage is good. But it is not regulating the voltage. I will check the feed back section once again and post the results.

    Regards

    S Das
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    Sticky: Hi SILVIO As per your advises i purchased a good...

    Hi SILVIO
    As per your advises i purchased a good Multimeter and output voltage is fine. Now i am facing another problem. Without Load i am getting 160v(80-0-80). After load 220V 25w Bulb voltage...
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    Sticky: I have tested the output with 100w,200w and 500w...

    I have tested the output with 100w,200w and 500w halogen bulbs. every think is fine no fluctuation. Only think is i have not added feedback circuit in PWM board. I checked the frequency at...
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    Sticky: Hi I have made the PCB and assembled it. Now...

    Hi

    I have made the PCB and assembled it. Now i am facing a new problem. When SMPS current is on I am not getting correct voltage. First of all by using multi meter i am getting some random...
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    Sticky: After successful project of Half bridge SMPS 1KV...

    After successful project of Half bridge SMPS 1KV I am going for net project Full bridge 2KV. One doubt is whether to use IR2110 or GDT for mosfet/IGBT driver. I do not have knowledge on GDT. Can any...
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    Sticky: Now my SMPS is working fine.Can anybody please...

    Now my SMPS is working fine.Can anybody please guide me after rectification of 220V which one is better option for Half bridge SMPS using two 4 capacitors of 1000uf/250v or 2 capacitors of...
  10. Kindly send me this E-book. My mail address is...

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

    Regards

    S Das
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    Sticky: Hi Silvio Thanks for giving suggestions....

    Hi Silvio

    Thanks for giving suggestions. Finally I got the success. Only problem i was using 12v from a PC SMPS. for 12v i used one small transformer then every thing fine. I also tested in...
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    Sticky: Hi Today I have test with temporary setup my...

    Hi

    Today I have test with temporary setup my SMPS with 35V power supply.Every thing works well. Attached wave form for your reference.

    Again i connected with 230v then same issue bulb is...
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    Sticky: Thanks Silvio Please find attached pictures....

    Thanks Silvio

    Please find attached pictures. Now I am removing some parts from PCB to check Individually.

    6952

    6953

    6954
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    Sticky: Thanks for quick reply Silivio My wave form...

    Thanks for quick reply Silivio
    My wave form without main power on is very good. But after switch on main power i am getting this type of waves at Mosfet. I have removed transformer also still I am...
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    Sticky: Today I have tested my SMPS . Wave form taken...

    Today I have tested my SMPS . Wave form taken from Mosfet attached. Please guide me what is the issue.

    6949
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    Sticky: Today I add 10K register at Source to Gate of...

    Today I add 10K register at Source to Gate of Mosfet. after that i connect mosfet and it was ok without PWM board and Transformer. Then i connect PWM board and bulb glow continuously. Then i connect...
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    Sticky: Hi Silivo For testing I have detached...

    Hi Silivo

    For testing I have detached Transformer from PCB after that i tested with series again bulb is glowing. After that i remove PWM board then also bulb is glowing ,at last i remove mosfets...
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    Sticky: HI Silivio I forgot to ask you one think that...

    HI Silivio

    I forgot to ask you one think that when i was testing my SMPS in series, 100W bulb was glowing till i switched off. Any mistake or it is normal? My scope model is PC based VDS1022 which...
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    Sticky: Hi Silvio Thanks for your good advice. ...

    Hi Silvio

    Thanks for your good advice.

    Today I have tested my SMPS using 100W bulb in series. It was OK. I got 46-0-46 v output without any load. I have tested it for 1 minute. MOSFETs are...
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    Sticky: Today I have tested my PWM board connected with...

    Today I have tested my PWM board connected with Main PCB.

    This picture taken from gate side of two mosfets with MAIN POWER OFF condition. Please guide me can I POWER on main with this setup.
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    Sticky: Today while I am testing my PWM module i have...

    Today while I am testing my PWM module i have observed the following, which is not looks good.

    1. SG module both the waves are good.
    2. From IR2110 LO side i am getting good wave form as well as...
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    Sticky: Todays work on PCB 6926

    Todays work on PCB

    6926
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    Sticky: Today I am able to complete primary side of Main...

    Today I am able to complete primary side of Main SMPS PCB. I got one Sprint Layout from Internet and modifying as per my requirment
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    Sticky: Today I modified my PWM PCB. Please guide me...

    Today I modified my PWM PCB.

    Please guide me if this is incorrect.

    6923
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    Sticky: This picture is wave of my PWM board. only SG3525...

    This picture is wave of my PWM board. only SG3525 IR2110 not connected.
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