Sunday, March 31, 2019

Simple 4 Volt DC to 400 Volt AC output circuit using mini step up transformer

Simplest DC to AC inverter circuit using 2 Phase primary 1 phase secondary mini step-up transformer powered by TIP41C NPN transistor. This circuit can step up 4 Volt DC to 400 Volt AC





39 comments:

  1. I have some queries related to this experiment:

    1. What is the turns-ratio of the transformer being used?

    2. How can I use this transformer in my Simulink model?

    3. What is the frequency of the output AC voltage and current? Is it pure sine? If not, what is its Total Harmonic Distortion (THD)?

    4. Can you explain how the circuit is actually working? (waveforms at the all the three terminals of the transformer etc.)

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    1. I have some queries related to this experiment:

      1. What is the turns-ratio of the transformer being used?

      ** I am not sure the turn ratio because that is factory made transformer salvaged from power supply but i can tell you the inductance value

      Phase 1A = 25 micro Henry
      Phase 1B = 325 micro Henry
      Phase 2 (High Voltage = 0.67 Henry

      2. How can I use this transformer in my Simulink model? -- To be honest i am not familiar with simulink software

      3. What is the frequency of the output AC voltage and current? Is it pure sine? If not, what is its Total Harmonic Distortion (THD)?
      **Frequency around 3500 Khz

      4. Can you explain how the circuit is actually working? (waveforms at the all the three terminals of the transformer etc.)

      * Very simple the transistor is the switching component. Because of the switch turn on and off the low voltage side transfer its energy to the high voltage side

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    2. 3500 khz? Do you mean 3500 Hz?

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    3. 3500khz is a lot--3500000hz.
      Can you explain the need for 2 Phase primary 1 phase secondary? What is the principle of operation?
      Thank you for the answers and explanations.

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    4. The transistor switching back and forth that is all that make the frequency

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    5. Ok. Let me ask this way: Why does there NEED to be Two primaries?

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    6. If the transformer using 1 primary the voltage step generation will be much less..compare to two phase primary. 1 phase primary transformer probably generates around 100 volt or so while two phases can go up to 500 volt...not that the primary winding for each is not exactly the same some are 1 is more while another is less -- you can know this by measuring the inductance value and here is the video you can learn from How to identify step up transformer

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    7. #1 How can I lower frequency to 3000 Hz?
      #2 How can I make 300 volt output using just One 1.2 volt rechargeable AA battery?
      Thank you.

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    8. Lower the frequency will take more circuit involved that need precision research. However to make 1.2 volt to 300 volt depends on the transformer and also the transistor capability...this you have to experiment yourself because the variable is too general.

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    9. I'm researching the use of inductive flyback voltage. Thank you.

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  2. can i use 9v transformer in place of mini transformer

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  3. hi, if my steup transformer that i got from a pc ahas 3 phases, could i use just 2 of them, is the output voltaje minor effcient? thanks

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    Replies
    1. You need to find out the connected pins of the transformer and also the high voltage and low voltage side of the transformer before you can use it properly...watch this video https://www.youtube.com/watch?v=e1wXJY42mzM

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  4. Is it possible to have a lower ac voltage produced? And how would i go about this?

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    1. Hi, in AC you don't really need a lower voltage because high voltage AC cover all the low voltage...for example 220 volt AC can power up anything that is 220 volt and below it...the voltage doesn't really matter...which you can also power up a device that uses 20 volt AC...do you mind what voltage you need and device do you intend to power up

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    2. I am looking to power a 12v electromagnet with ac current to repel aluminium. Will a higher voltage fry the magnet?

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    3. Aaaa...that's very easy...you don't need to lower the voltage...and it doesn't matter if your electromagnet only need 12...voltage won't do any harm to it..

      Usually why fry anything in electricity is the amp...

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    4. Two questions:
      1) I am using a 12v lipo to power the magnets, is there anything in your inverter that needs to change to cope with the higher voltage?
      2) Where did you source your transformer from?

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    5. change the resistor to 5 KOhm and you might need heatsink for the transistor

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    6. And also add a 1uF capacitor at the output to regulate the voltage spike. Maybe this circuit suit you best http://howtodosteps.blogspot.my/2016/12/12-dc-battery-to-220-ac-inverter-circuit.html

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    7. Where did you get your transformer from?

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    8. I couldn't recall either that was purchased from ebay or aliexpress or salvaged somewhere from faulty electronic devices -- caused there are bunch of them and i just took it to test on the video.

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  5. Hi, could i use a 9v batt to get on a 5w lamp? thanks

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    Replies
    1. Yes definitely you can also use 2 AA batteries = 3 Volt see this video https://www.youtube.com/watch?v=n-TpfTEtHH0 it can still light up even at 0.9 volt although not so bright

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  6. please add me as friend. abante.marvinkaye@gmail.com
    I'm trying to reach you. tnx

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  7. hi can i use 12 volt transformer?

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    Replies
    1. Yes u can but you may need more power like 12 Volt to power it.

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  8. I have a 12 volt dc motor for a hydroelectric project, and I want to convert the electricity (about 3 volts)from that to power a small aquarium water pump. Is that possible with this inverter?

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    Replies
    1. This is not the appropriate circuit to use but this one yes

      https://www.youtube.com/watch?v=P--ueJvVTVg&t=46s

      https://www.youtube.com/watch?v=xXIxvY9rQjI

      https://www.youtube.com/watch?v=hOYNfOKOauw&t=63s

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  10. hi, i want to use a 12V to create a over 1000W inverter with your circuit. Any help for me on which transformer to use?

    Thanks.

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    Replies
    1. That would drain the battery really fast - but anyway look for mosfet and high power transformer

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  12. I had those circuit on hand they are abundant on moquito zapper from Chin nes manufacturer and i teardown it, i found out thet primary 8 tuns of. 3mm diameter copper wire and feed back. 1 mm i guess and the same phasing of winding

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