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Recent content by I_think

  1. I

    Output frequency problem in inverter

    Try removing L1 & C1. See what you get. the switching frequency Should be such that the core should work as LPF. This is what typically done with home sine-wave inverters. I will share the Module (IC) here If I find it. for reference. Found One more hint. Refer EGS003.
  2. I

    Is a snubber circuit required with zero-cross optocoupler

    Zero Crossing is sure happening or then its not firing the gate. Because I am using MOC3063. Please check the schematic pdf attached. But if you still feel there could be other reason for not firing at zerocrossing please let me know. Logically I am eliminating the chance of delayed firing...
  3. I

    Is a snubber circuit required with zero-cross optocoupler

    OK, I guess.... Let me see if I can find out surge because of capacitor. But then the capacitor too gets switched during Zerocrossing.
  4. I

    Is a snubber circuit required with zero-cross optocoupler

    Inductive load of 60W 230VAC( celling fan) . BTA16 Looking at the specs I am still not able to understand that. Triac specifications are surely over rated. Please correct me is I am wrong.
  5. I

    Is a snubber circuit required with zero-cross optocoupler

    I get that. But I am wondering what was that thing or possibly point that I missed while designing that got the triac damaged.
  6. I

    Is a snubber circuit required with zero-cross optocoupler

    I had same type circuit working and the triac blew off (open). I am still wondering why. I use it with ceiling fan. Attaching the schematic.
  7. I

    Xc Saves power when used as resistor ? True?

    ok, Screenshot of result please. Also which simulator did you use? - - - Updated - - - In the above attached graph you will see, Red line which shows that it takes time to charge the cap . But once when its charged , its steady. In the blue graph , which is output (across load 10K)...
  8. I

    Xc Saves power when used as resistor ? True?

    And how did you generate half wave? can you share the screenshot if the schematic ?
  9. I

    Xc Saves power when used as resistor ? True?

    Let me say its conditional. If it is connected to the output of pulse transformer , It would work as you said. But if the half cycle is generated using diode in series, then there would be no discharge path.
  10. I

    Xc Saves power when used as resistor ? True?

    Thanks for the reply Brian. I have designed a few power supply using capacitive drop. And they are amazing and cost effective when you need low current. I was trying to understand how efficient is this method compared to resistive ( using resistor). How much power can really be saved and...
  11. I

    Xc Saves power when used as resistor ? True?

    When we use capacitive drop power supply does it save power ? True? The above way for reference.
  12. I

    Using Plain polyester or Metalized polyester Capacitor in place of polypropylene

    FVM thanks, when ever I put on thread you mostly answer all. :) I am expecting that. Also wondering if it can handle surge. I remember a decade ago when these capacitor regulator swamped the indian market , there were heavy failures. mostly cap blew off. now all of them have stabilized their...
  13. I

    30w flyback not giving output.

    I would with easy peasy. you need to rebuild it. also keep in mind that your transformer is done properly and the snubber is done properly. do you have oscilloscope ? Please share schematic.
  14. I

    Using Plain polyester or Metalized polyester Capacitor in place of polypropylene

    I was trying to understand if I can use Plain polyester capacitors in fan regulator circuit instead of polypropylene. Refrence : regulator type. https://www.indiamart.com/proddetail/fan-regulator-circuit-4705838233.html
  15. I

    6N136 spice not working. (Proteus)

    Unfortunately I can not do that. Because of some administrative restrictions. But will still be trying that again.
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