How to create a DC-AC converter using MOSFETS?

Discussion in 'Homework Help' started by Halim.Akiki, Jan 1, 2015.

  1. Halim.Akiki

    Thread Starter Member

    Dec 29, 2014
    44
    1
    Hello! I have a small project and i want to create a DC-AC inverter using only MOSFETS and diodes. Any ideas about the circuit?
     
  2. ScottWang

    Moderator

    Aug 23, 2012
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    Too less infos, so nobody could help you.
    1. Input V/I
    2. Output V/I
    3. What is the load?
    3. How many components that you limited?
    4. Sometimes you will need coil to help to generate the AC, do you inhibit to do that?
     
    Halim.Akiki likes this.
  3. Halim.Akiki

    Thread Starter Member

    Dec 29, 2014
    44
    1
    My input is a 14 V DC voltage resulting from an AC-DC converter connected to a 12 V battery. The output can be anything because this is a mini project for a lab at university and the purpose is only for us to understand the concept of the backup power system. I already made the full wave rectifier (diode bridge) and added a capacitor on it's output to make it DC. No load will be added we will just use an oscilloscope to verify the result. A hint was given that we have to use 4 MOSFETS and 4 diodes.
     
  4. ScottWang

    Moderator

    Aug 23, 2012
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    Your title and first post shown that you have to create a DC-AC inverter, but your post in #3 said these :
    My input is a 14 V DC voltage resulting from an AC-DC converter connected to a 12 V battery.
    What do you really want, DC-AC,AC-DC,DC-DC?
     
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  5. Halim.Akiki

    Thread Starter Member

    Dec 29, 2014
    44
    1
    No. It's an AD-DC followed by a DC-AC. Te AC-DC charges the battery and the DC-AC converts the 12V of the battery to AC to be used while power breakdown.
     
  6. ScottWang

    Moderator

    Aug 23, 2012
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    Do they like these:
    AC-DC : converts AC220V to 14V?
    14V charging 12V battery?
    DC-AC : converts the 12V battery to AC220V?

    So what want is to converts 12V to AC220V, in this situation you will need a transformer, but you said that you only can used 4 mosfets and 4 diodes?
     
  7. Halim.Akiki

    Thread Starter Member

    Dec 29, 2014
    44
    1
    I
    I want to transform 14 V DC to 14 V AC using 4 mosfets and 4 diodes.
     
  8. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    From DC to AC, you will need transformer or coil, inductance, I haven't see the way no such components ...

    The mosfet as a switch, but it needs transformer to generate the power from secondary.
     
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